./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1184872718
<...>
[ 16.779348][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #80!!!
[ 16.782567][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #80!!!
Warning: Permanently added '10.128.1.181' (ECDSA) to the list of known hosts.
execve("./syz-executor1184872718", ["./syz-executor1184872718"], 0x7fffe5abc7a0 /* 10 vars */) = 0
brk(NULL) = 0x555556086000
brk(0x555556086c40) = 0x555556086c40
arch_prctl(ARCH_SET_FS, 0x555556086300) = 0
uname({sysname="Linux", nodename="syzkaller", ...}) = 0
set_tid_address(0x5555560865d0) = 371
set_robust_list(0x5555560865e0, 24) = 0
rt_sigaction(SIGRTMIN, {sa_handler=0x7f236e497210, sa_mask=[], sa_flags=SA_RESTORER|SA_SIGINFO, sa_restorer=0x7f236e4978e0}, NULL, 8) = 0
rt_sigaction(SIGRT_1, {sa_handler=0x7f236e4972b0, sa_mask=[], sa_flags=SA_RESTORER|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f236e4978e0}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor1184872718", 4096) = 28
brk(0x5555560a7c40) = 0x5555560a7c40
brk(0x5555560a8000) = 0x5555560a8000
mprotect(0x7f236e557000, 16384, PROT_READ) = 0
mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000
mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000
mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 372
./strace-static-x86_64: Process 372 attached
[pid 372] set_robust_list(0x5555560865e0, 24) = 0
[pid 372] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 372] setpgid(0, 0) = 0
[pid 372] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 372] write(3, "1000", 4) = 4
[pid 372] close(3) = 0
[pid 372] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 372] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 372] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 372] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[373], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 373
[pid 372] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 372] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 373 attached
<unfinished ...>
[pid 373] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 373] mkdir("./file0", 000) = 0
[pid 373] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 372] <... futex resumed>) = 0
[pid 372] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 372] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 373] <... futex resumed>) = 1
[pid 373] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 373] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 372] <... futex resumed>) = 0
[pid 372] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 372] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 373] <... futex resumed>) = 1
[pid 373] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 373] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 372] <... futex resumed>) = 0
[pid 372] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 372] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 372] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 372] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 372] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[374], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 374
[pid 372] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 372] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 373] <... futex resumed>) = 1
[pid 373] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 374 attached
<unfinished ...>
[pid 374] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 374] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 373] <... umount2 resumed>) = 0
[pid 373] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 373] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 374] <... umount2 resumed>) = 0
[pid 374] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 372] <... futex resumed>) = 0
[pid 372] exit_group(0) = ?
[pid 373] <... futex resumed>) = ?
[pid 373] +++ exited with 0 +++
[pid 374] <... futex resumed>) = ?
[pid 374] +++ exited with 0 +++
[pid 372] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=372, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 375
./strace-static-x86_64: Process 375 attached
[pid 375] set_robust_list(0x5555560865e0, 24) = 0
[pid 375] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 375] setpgid(0, 0) = 0
[pid 375] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 375] write(3, "1000", 4) = 4
[pid 375] close(3) = 0
[pid 375] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 375] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 375] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 375] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[376], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 376
[pid 375] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[ 19.756275][ T23] audit: type=1400 audit(1677366140.560:73): avc: denied { execmem } for pid=371 comm="syz-executor118" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1
[ 19.775869][ T23] audit: type=1400 audit(1677366140.570:74): avc: denied { mounton } for pid=372 comm="syz-executor118" path="/root/file0" dev="sda1" ino=1138 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1
[pid 375] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 376 attached
<unfinished ...>
[pid 376] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 376] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 376] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 375] <... futex resumed>) = 0
[pid 375] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 375] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 376] <... futex resumed>) = 1
[pid 376] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 376] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 375] <... futex resumed>) = 0
[pid 375] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 375] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 376] <... futex resumed>) = 1
[pid 376] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 376] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 375] <... futex resumed>) = 0
[pid 375] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 375] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 375] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 375] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 375] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[377], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 377
[pid 375] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 375] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 376] <... futex resumed>) = 1
[pid 376] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 377 attached
<unfinished ...>
[pid 377] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 377] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 376] <... umount2 resumed>) = 0
[pid 376] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 376] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 377] <... umount2 resumed>) = 0
[pid 377] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 375] <... futex resumed>) = 0
[pid 375] exit_group(0) = ?
[pid 376] <... futex resumed>) = ?
[pid 376] +++ exited with 0 +++
[pid 377] <... futex resumed>) = ?
[pid 377] +++ exited with 0 +++
[pid 375] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=375, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 378
./strace-static-x86_64: Process 378 attached
[pid 378] set_robust_list(0x5555560865e0, 24) = 0
[pid 378] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 378] setpgid(0, 0) = 0
[pid 378] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 378] write(3, "1000", 4) = 4
[pid 378] close(3) = 0
[pid 378] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 378] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 378] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 378] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[379], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 379
[pid 378] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 378] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 379 attached
<unfinished ...>
[pid 379] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 379] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 379] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 378] <... futex resumed>) = 0
[pid 378] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 378] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 379] <... futex resumed>) = 1
[ 19.799879][ T23] audit: type=1400 audit(1677366140.570:75): avc: denied { mount } for pid=372 comm="syz-executor118" name="/" dev="ramfs" ino=1022 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:ramfs_t tclass=filesystem permissive=1
[ 19.822977][ T23] audit: type=1400 audit(1677366140.570:76): avc: denied { mounton } for pid=372 comm="syz-executor118" path="/root/file0" dev="ramfs" ino=1022 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:ramfs_t tclass=dir permissive=1
[pid 379] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 379] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 378] <... futex resumed>) = 0
[pid 378] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 378] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 379] <... futex resumed>) = 1
[pid 379] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 379] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 378] <... futex resumed>) = 0
[pid 378] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 378] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 378] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 378] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 378] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[380], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 380
[pid 378] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 378] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 379] <... futex resumed>) = 1
[pid 379] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 380 attached
<unfinished ...>
[pid 380] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 380] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 379] <... umount2 resumed>) = 0
[pid 379] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 379] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 380] <... umount2 resumed>) = 0
[pid 380] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 378] <... futex resumed>) = 0
[pid 378] exit_group(0) = ?
[pid 379] <... futex resumed>) = ?
[pid 379] +++ exited with 0 +++
[pid 380] <... futex resumed>) = ?
[pid 380] +++ exited with 0 +++
[pid 378] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=378, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 381
./strace-static-x86_64: Process 381 attached
[pid 381] set_robust_list(0x5555560865e0, 24) = 0
[pid 381] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 381] setpgid(0, 0) = 0
[pid 381] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 381] write(3, "1000", 4) = 4
[pid 381] close(3) = 0
[pid 381] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 381] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 381] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 381] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[382], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 382
[pid 381] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 381] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 382 attached
<unfinished ...>
[pid 382] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 382] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 382] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 381] <... futex resumed>) = 0
[pid 381] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 381] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 382] <... futex resumed>) = 1
[pid 382] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 382] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 381] <... futex resumed>) = 0
[pid 381] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 381] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 382] <... futex resumed>) = 1
[pid 382] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 382] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 381] <... futex resumed>) = 0
[pid 381] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 381] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 381] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 381] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 381] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[383], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 383
[pid 381] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 381] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 382] <... futex resumed>) = 1
[pid 382] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 383 attached
<unfinished ...>
[pid 383] set_robust_list(0x7f236e4669e0, 24) = 0
[ 19.846197][ T23] audit: type=1400 audit(1677366140.570:77): avc: denied { mount } for pid=372 comm="syz-executor118" name="/" dev="incremental-fs" ino=1022 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=filesystem permissive=1
[ 19.870561][ T23] audit: type=1400 audit(1677366140.570:78): avc: denied { unmount } for pid=372 comm="syz-executor118" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=filesystem permissive=1
[pid 383] umount2("./file0", MNT_DETACH) = 0
[pid 382] <... umount2 resumed>) = 0
[pid 383] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 381] <... futex resumed>) = 0
[pid 383] <... futex resumed>) = 1
[pid 383] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 382] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 382] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 381] exit_group(0) = ?
[pid 382] <... futex resumed>) = ?
[pid 382] +++ exited with 0 +++
[pid 383] <... futex resumed>) = ?
[pid 383] +++ exited with 0 +++
[pid 381] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=381, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 384
./strace-static-x86_64: Process 384 attached
[pid 384] set_robust_list(0x5555560865e0, 24) = 0
[pid 384] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 384] setpgid(0, 0) = 0
[pid 384] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 384] write(3, "1000", 4) = 4
[pid 384] close(3) = 0
[pid 384] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 384] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 384] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 384] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 385 attached
<unfinished ...>
[pid 385] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 385] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 384] <... clone resumed>, parent_tid=[385], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 385
[pid 384] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 385] <... futex resumed>) = 0
[pid 385] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 384] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 385] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 385] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 384] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 384] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 385] <... futex resumed>) = 0
[pid 385] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 385] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 385] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 384] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 384] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 385] <... futex resumed>) = 0
[pid 385] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 384] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 385] <... mount resumed>) = 0
[pid 385] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 385] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 384] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 384] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 385] <... futex resumed>) = 0
[pid 385] umount2("./file0", MNT_DETACH) = 0
[pid 385] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 385] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 384] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 385] <... futex resumed>) = 0
[pid 384] <... futex resumed>) = 1
[pid 385] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 384] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 385] <... umount2 resumed>) = 0
[pid 385] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 385] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 384] <... futex resumed>) = 0
[pid 384] exit_group(0) = ?
[pid 385] <... futex resumed>) = ?
[pid 385] +++ exited with 0 +++
[pid 384] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=384, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 386 attached
, child_tidptr=0x5555560865d0) = 386
[pid 386] set_robust_list(0x5555560865e0, 24) = 0
[pid 386] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 386] setpgid(0, 0) = 0
[pid 386] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 386] write(3, "1000", 4) = 4
[pid 386] close(3) = 0
[pid 386] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 386] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 386] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 386] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[387], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 387
[pid 386] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 386] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 387 attached
<unfinished ...>
[pid 387] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 387] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 387] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 386] <... futex resumed>) = 0
[pid 386] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 386] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 387] <... futex resumed>) = 1
[pid 387] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 387] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 386] <... futex resumed>) = 0
[pid 386] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 386] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 387] <... futex resumed>) = 1
[pid 387] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 387] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 386] <... futex resumed>) = 0
[pid 386] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 386] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 386] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 386] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 386] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[388], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 388
[pid 386] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 386] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 387] <... futex resumed>) = 1
[pid 387] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 388 attached
<unfinished ...>
[pid 388] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 387] <... umount2 resumed>) = 0
[pid 387] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 388] <... set_robust_list resumed>) = 0
[pid 387] <... futex resumed>) = 0
[pid 388] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 387] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 388] <... umount2 resumed>) = 0
[pid 388] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 386] <... futex resumed>) = 0
[pid 388] <... futex resumed>) = 1
[pid 386] exit_group(0 <unfinished ...>
[pid 388] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 386] <... exit_group resumed>) = ?
[pid 387] <... futex resumed>) = ?
[pid 387] +++ exited with 0 +++
[pid 388] <... futex resumed>) = ?
[pid 388] +++ exited with 0 +++
[pid 386] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=386, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 389
./strace-static-x86_64: Process 389 attached
[pid 389] set_robust_list(0x5555560865e0, 24) = 0
[pid 389] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 389] setpgid(0, 0) = 0
[pid 389] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 389] write(3, "1000", 4) = 4
[pid 389] close(3) = 0
[pid 389] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 389] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 389] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 389] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 390 attached
, parent_tid=[390], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 390
[pid 390] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 390] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 389] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 389] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 390] <... futex resumed>) = 0
[pid 390] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 390] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[ 19.891087][ T23] audit: type=1400 audit(1677366140.570:79): avc: denied { unmount } for pid=372 comm="syz-executor118" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:ramfs_t tclass=filesystem permissive=1
[pid 390] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 389] <... futex resumed>) = 0
[pid 389] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 390] <... futex resumed>) = 0
[pid 390] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 389] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 390] <... mount resumed>) = 0
[pid 390] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 390] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 389] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 389] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 390] <... futex resumed>) = 0
[pid 390] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 389] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 390] <... mount resumed>) = 0
[pid 390] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 390] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 389] <... futex resumed>) = 0
[pid 389] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 390] <... futex resumed>) = 0
[pid 390] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 389] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 389] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 390] <... umount2 resumed>) = 0
[pid 390] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 390] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 389] <... mmap resumed>) = 0x7f236e446000
[pid 389] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 389] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 391 attached
, parent_tid=[391], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 391
[pid 391] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 389] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 391] <... set_robust_list resumed>) = 0
[pid 389] <... futex resumed>) = 0
[pid 391] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 389] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 391] <... umount2 resumed>) = 0
[pid 391] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 391] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 389] <... futex resumed>) = 0
[pid 389] exit_group(0 <unfinished ...>
[pid 390] <... futex resumed>) = ?
[pid 390] +++ exited with 0 +++
[pid 389] <... exit_group resumed>) = ?
[pid 391] <... futex resumed>) = ?
[pid 391] +++ exited with 0 +++
[pid 389] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=389, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 392
./strace-static-x86_64: Process 392 attached
[pid 392] set_robust_list(0x5555560865e0, 24) = 0
[pid 392] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 392] setpgid(0, 0) = 0
[pid 392] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 392] write(3, "1000", 4) = 4
[pid 392] close(3) = 0
[pid 392] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 392] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 392] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 392] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[393], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 393
[pid 392] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 392] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 393 attached
<unfinished ...>
[pid 393] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 393] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 393] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 392] <... futex resumed>) = 0
[pid 392] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 392] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 393] <... futex resumed>) = 1
[pid 393] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 393] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 392] <... futex resumed>) = 0
[pid 392] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 392] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 393] <... futex resumed>) = 1
[pid 393] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 393] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 392] <... futex resumed>) = 0
[pid 392] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 392] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 392] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 392] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 392] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[394], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 394
[pid 392] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 392] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 393] <... futex resumed>) = 1
[pid 393] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 394 attached
) = 0
[pid 393] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 393] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 394] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 394] umount2("./file0", MNT_DETACH) = 0
[pid 394] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 392] <... futex resumed>) = 0
[pid 392] exit_group(0) = ?
[pid 393] <... futex resumed>) = ?
[pid 393] +++ exited with 0 +++
[pid 394] <... futex resumed>) = ?
[pid 394] +++ exited with 0 +++
[pid 392] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=392, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 395
./strace-static-x86_64: Process 395 attached
[pid 395] set_robust_list(0x5555560865e0, 24) = 0
[pid 395] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 395] setpgid(0, 0) = 0
[pid 395] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 395] write(3, "1000", 4) = 4
[pid 395] close(3) = 0
[pid 395] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 395] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 395] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 395] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[396], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 396
[pid 395] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 395] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 396 attached
<unfinished ...>
[pid 396] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 396] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 396] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 395] <... futex resumed>) = 0
[pid 395] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 395] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 396] <... futex resumed>) = 1
[pid 396] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 396] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 395] <... futex resumed>) = 0
[pid 395] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 395] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 396] <... futex resumed>) = 1
[pid 396] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 396] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 395] <... futex resumed>) = 0
[pid 395] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 395] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 395] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 395] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 395] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[397], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 397
[pid 395] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 395] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 396] <... futex resumed>) = 1
[pid 396] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 397 attached
) = 0
[pid 396] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 396] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 397] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 397] umount2("./file0", MNT_DETACH) = 0
[pid 397] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 395] <... futex resumed>) = 0
[pid 395] exit_group(0) = ?
[pid 396] <... futex resumed>) = ?
[pid 396] +++ exited with 0 +++
[pid 397] <... futex resumed>) = ?
[pid 397] +++ exited with 0 +++
[pid 395] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=395, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 398 attached
, child_tidptr=0x5555560865d0) = 398
[pid 398] set_robust_list(0x5555560865e0, 24) = 0
[pid 398] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 398] setpgid(0, 0) = 0
[pid 398] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 398] write(3, "1000", 4) = 4
[pid 398] close(3) = 0
[pid 398] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 398] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 398] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 398] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[399], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 399
./strace-static-x86_64: Process 399 attached
[pid 398] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 399] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 399] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 399] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 399] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 398] <... futex resumed>) = 1
[pid 398] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 398] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 398] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 399] <... futex resumed>) = 0
[pid 399] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 399] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 398] <... futex resumed>) = 0
[pid 398] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 398] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 399] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 399] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 398] <... futex resumed>) = 0
[pid 399] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 398] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 399] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 398] <... futex resumed>) = 0
[pid 399] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 398] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 399] <... umount2 resumed>) = 0
[pid 398] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 399] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 398] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 399] <... futex resumed>) = 0
[pid 398] <... mprotect resumed>) = 0
[pid 399] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 398] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 400 attached
, parent_tid=[400], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 400
[pid 398] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 400] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 398] <... futex resumed>) = 0
[pid 400] <... set_robust_list resumed>) = 0
[pid 398] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 400] umount2("./file0", MNT_DETACH) = 0
[pid 400] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 398] <... futex resumed>) = 0
[pid 400] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 398] exit_group(0) = ?
[pid 399] <... futex resumed>) = ?
[pid 399] +++ exited with 0 +++
[pid 400] <... futex resumed>) = ?
[pid 400] +++ exited with 0 +++
[pid 398] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=398, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 401
./strace-static-x86_64: Process 401 attached
[pid 401] set_robust_list(0x5555560865e0, 24) = 0
[pid 401] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 401] setpgid(0, 0) = 0
[pid 401] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 401] write(3, "1000", 4) = 4
[pid 401] close(3) = 0
[pid 401] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 401] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 401] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 401] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 402 attached
<unfinished ...>
[pid 402] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 402] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 401] <... clone resumed>, parent_tid=[402], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 402
[pid 401] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 402] <... futex resumed>) = 0
[pid 401] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 402] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 402] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 402] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 401] <... futex resumed>) = 0
[pid 401] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 402] <... futex resumed>) = 0
[pid 402] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 401] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 402] <... mount resumed>) = 0
[pid 402] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 402] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 401] <... futex resumed>) = 0
[pid 401] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 402] <... futex resumed>) = 0
[pid 401] <... futex resumed>) = 1
[pid 402] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 401] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 402] <... mount resumed>) = 0
[pid 402] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 401] <... futex resumed>) = 0
[pid 402] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 401] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 402] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 401] <... futex resumed>) = 0
[pid 402] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 401] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 401] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 401] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 401] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 402] <... umount2 resumed>) = 0
[pid 402] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 401] <... clone resumed>, parent_tid=[403], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 403
[pid 402] <... futex resumed>) = 0
[pid 401] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 401] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 402] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 403 attached
<unfinished ...>
[pid 403] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 403] umount2("./file0", MNT_DETACH) = 0
[pid 403] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 403] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 401] <... futex resumed>) = 0
[pid 401] exit_group(0) = ?
[pid 402] <... futex resumed>) = ?
[pid 403] <... futex resumed>) = ?
[pid 402] +++ exited with 0 +++
[pid 403] +++ exited with 0 +++
[pid 401] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=401, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 404
./strace-static-x86_64: Process 404 attached
[pid 404] set_robust_list(0x5555560865e0, 24) = 0
[pid 404] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 404] setpgid(0, 0) = 0
[pid 404] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 404] write(3, "1000", 4) = 4
[pid 404] close(3) = 0
[pid 404] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 404] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 404] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 404] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[405], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 405
[pid 404] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 404] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 405 attached
<unfinished ...>
[pid 405] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 405] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 405] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 404] <... futex resumed>) = 0
[pid 404] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 404] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 405] <... futex resumed>) = 1
[pid 405] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 405] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 404] <... futex resumed>) = 0
[pid 404] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 404] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 405] <... futex resumed>) = 1
[pid 405] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 405] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 404] <... futex resumed>) = 0
[pid 405] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 404] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 405] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 404] <... futex resumed>) = 0
[pid 405] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 404] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 404] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 404] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 404] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 405] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 406 attached
[pid 405] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 404] <... clone resumed>, parent_tid=[406], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 406
[pid 406] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 405] <... futex resumed>) = 0
[pid 404] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 406] <... set_robust_list resumed>) = 0
[pid 405] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 404] <... futex resumed>) = 0
[pid 406] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 404] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 406] <... umount2 resumed>) = 0
[pid 406] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 404] <... futex resumed>) = 0
[pid 406] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 404] exit_group(0 <unfinished ...>
[pid 405] <... futex resumed>) = ?
[pid 406] <... futex resumed>) = 231
[pid 404] <... exit_group resumed>) = ?
[pid 405] +++ exited with 0 +++
[pid 406] +++ exited with 0 +++
[pid 404] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=404, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 407
./strace-static-x86_64: Process 407 attached
[pid 407] set_robust_list(0x5555560865e0, 24) = 0
[pid 407] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 407] setpgid(0, 0) = 0
[pid 407] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 407] write(3, "1000", 4) = 4
[pid 407] close(3) = 0
[pid 407] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 407] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 407] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 407] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[408], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 408
[pid 407] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 407] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 408 attached
<unfinished ...>
[pid 408] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 408] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 408] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 407] <... futex resumed>) = 0
[pid 407] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 407] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 408] <... futex resumed>) = 1
[pid 408] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 408] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 407] <... futex resumed>) = 0
[pid 407] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 407] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 408] <... futex resumed>) = 1
[pid 408] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 408] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 407] <... futex resumed>) = 0
[pid 408] <... futex resumed>) = 1
[pid 407] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 408] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 407] <... futex resumed>) = 0
[pid 407] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 407] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 407] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 408] <... umount2 resumed>) = 0
[pid 407] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 408] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 409 attached
[pid 408] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 407] <... clone resumed>, parent_tid=[409], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 409
[pid 409] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 407] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 409] <... set_robust_list resumed>) = 0
[pid 407] <... futex resumed>) = 0
[pid 409] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 407] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 409] <... umount2 resumed>) = 0
[pid 409] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 407] <... futex resumed>) = 0
[pid 407] exit_group(0 <unfinished ...>
[pid 409] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 407] <... exit_group resumed>) = ?
[pid 408] <... futex resumed>) = ?
[pid 409] <... futex resumed>) = ?
[pid 408] +++ exited with 0 +++
[pid 409] +++ exited with 0 +++
[pid 407] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=407, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 410
./strace-static-x86_64: Process 410 attached
[pid 410] set_robust_list(0x5555560865e0, 24) = 0
[pid 410] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 410] setpgid(0, 0) = 0
[pid 410] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 410] write(3, "1000", 4) = 4
[pid 410] close(3) = 0
[pid 410] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 410] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 410] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 410] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[411], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 411
[pid 410] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 410] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 411 attached
<unfinished ...>
[pid 411] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 411] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 411] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 410] <... futex resumed>) = 0
[pid 410] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 410] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 411] <... futex resumed>) = 1
[pid 411] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 411] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 410] <... futex resumed>) = 0
[pid 410] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 410] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 411] <... futex resumed>) = 1
[pid 411] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 411] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 410] <... futex resumed>) = 0
[pid 410] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 410] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 410] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 410] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 410] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 411] <... futex resumed>) = 1
./strace-static-x86_64: Process 412 attached
[pid 411] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 410] <... clone resumed>, parent_tid=[412], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 412
[pid 412] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 412] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 411] <... umount2 resumed>) = 0
[pid 410] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 412] <... futex resumed>) = 0
[pid 410] <... futex resumed>) = 1
[pid 412] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 410] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 411] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 411] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 412] <... umount2 resumed>) = 0
[pid 412] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 410] <... futex resumed>) = 0
[pid 410] exit_group(0) = ?
[pid 411] <... futex resumed>) = ?
[pid 411] +++ exited with 0 +++
[pid 412] +++ exited with 0 +++
[pid 410] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=410, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 413
./strace-static-x86_64: Process 413 attached
[pid 413] set_robust_list(0x5555560865e0, 24) = 0
[pid 413] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 413] setpgid(0, 0) = 0
[pid 413] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 413] write(3, "1000", 4) = 4
[pid 413] close(3) = 0
[pid 413] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 413] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 413] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 413] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 414 attached
, parent_tid=[414], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 414
[pid 414] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 413] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 414] <... set_robust_list resumed>) = 0
[pid 413] <... futex resumed>) = 0
[pid 413] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 414] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 414] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 413] <... futex resumed>) = 0
[pid 414] <... futex resumed>) = 1
[pid 414] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 413] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 413] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 414] <... mount resumed>) = 0
[pid 414] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 413] <... futex resumed>) = 0
[pid 414] <... futex resumed>) = 1
[pid 413] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 414] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 413] <... futex resumed>) = 0
[pid 413] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 414] <... mount resumed>) = 0
[pid 414] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 413] <... futex resumed>) = 0
[pid 413] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 413] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 413] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 413] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 413] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[415], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 415
./strace-static-x86_64: Process 415 attached
[pid 413] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 415] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 413] <... futex resumed>) = 0
[pid 415] <... set_robust_list resumed>) = 0
[pid 413] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 415] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 414] umount2("./file0", MNT_DETACH) = 0
[pid 415] <... umount2 resumed>) = 0
[pid 414] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 415] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 413] <... futex resumed>) = 0
[pid 415] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 413] exit_group(0) = ?
[pid 415] <... futex resumed>) = ?
[pid 414] <... futex resumed>) = -1 (errno 18446744073709551555)
[pid 415] +++ exited with 0 +++
[pid 414] +++ exited with 0 +++
[pid 413] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=413, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 416
./strace-static-x86_64: Process 416 attached
[pid 416] set_robust_list(0x5555560865e0, 24) = 0
[pid 416] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 416] setpgid(0, 0) = 0
[pid 416] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 416] write(3, "1000", 4) = 4
[pid 416] close(3) = 0
[pid 416] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 416] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 416] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 416] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 417 attached
, parent_tid=[417], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 417
[pid 417] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 416] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 417] <... set_robust_list resumed>) = 0
[pid 416] <... futex resumed>) = 0
[pid 416] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 417] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 417] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 416] <... futex resumed>) = 0
[pid 417] <... futex resumed>) = 1
[pid 416] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 417] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 416] <... futex resumed>) = 0
[pid 416] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 417] <... mount resumed>) = 0
[pid 417] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 416] <... futex resumed>) = 0
[pid 416] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 417] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 416] <... futex resumed>) = 0
[pid 416] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 417] <... mount resumed>) = 0
[pid 417] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 416] <... futex resumed>) = 0
[pid 417] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 416] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 416] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 416] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 416] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 416] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 417] <... umount2 resumed>) = 0
[pid 417] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 416] <... clone resumed>, parent_tid=[418], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 418
[pid 417] <... futex resumed>) = 0
[pid 416] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 417] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 416] <... futex resumed>) = 0
./strace-static-x86_64: Process 418 attached
[pid 418] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 416] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 418] <... set_robust_list resumed>) = 0
[pid 418] umount2("./file0", MNT_DETACH) = 0
[pid 418] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 416] <... futex resumed>) = 0
[pid 418] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 416] exit_group(0) = ?
[pid 417] <... futex resumed>) = ?
[pid 417] +++ exited with 0 +++
[pid 418] <... futex resumed>) = ?
[pid 418] +++ exited with 0 +++
[pid 416] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=416, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 419
./strace-static-x86_64: Process 419 attached
[pid 419] set_robust_list(0x5555560865e0, 24) = 0
[pid 419] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 419] setpgid(0, 0) = 0
[pid 419] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 419] write(3, "1000", 4) = 4
[pid 419] close(3) = 0
[pid 419] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 419] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 419] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 419] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 420 attached
, parent_tid=[420], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 420
[pid 420] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 419] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 420] <... set_robust_list resumed>) = 0
[pid 419] <... futex resumed>) = 0
[pid 419] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 420] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 420] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 419] <... futex resumed>) = 0
[pid 420] <... futex resumed>) = 1
[pid 419] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 420] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 419] <... futex resumed>) = 0
[pid 419] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 420] <... mount resumed>) = 0
[pid 420] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 419] <... futex resumed>) = 0
[pid 419] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 419] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 420] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 420] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 419] <... futex resumed>) = 0
[pid 420] <... futex resumed>) = 1
[pid 419] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 420] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 419] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 419] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 419] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 419] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 421 attached
, parent_tid=[421], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 421
[pid 420] <... umount2 resumed>) = 0
[pid 419] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 421] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 419] <... futex resumed>) = 0
[pid 420] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 419] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 421] <... set_robust_list resumed>) = 0
[pid 420] <... futex resumed>) = 0
[pid 421] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 420] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 421] <... umount2 resumed>) = 0
[pid 421] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 419] <... futex resumed>) = 0
[pid 419] exit_group(0) = ?
[pid 420] <... futex resumed>) = ?
[pid 420] +++ exited with 0 +++
[pid 421] +++ exited with 0 +++
[pid 419] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=419, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 422
./strace-static-x86_64: Process 422 attached
[pid 422] set_robust_list(0x5555560865e0, 24) = 0
[pid 422] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 422] setpgid(0, 0) = 0
[pid 422] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 422] write(3, "1000", 4) = 4
[pid 422] close(3) = 0
[pid 422] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 422] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 422] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 422] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[423], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 423
[pid 422] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 422] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 423 attached
<unfinished ...>
[pid 423] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 423] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 423] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 422] <... futex resumed>) = 0
[pid 422] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 422] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 423] <... futex resumed>) = 1
[pid 423] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 423] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 422] <... futex resumed>) = 0
[pid 422] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 422] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 423] <... futex resumed>) = 1
[pid 423] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 423] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 422] <... futex resumed>) = 0
[pid 423] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 422] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 423] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 422] <... futex resumed>) = 0
[pid 423] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 422] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 422] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 422] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 423] <... umount2 resumed>) = 0
[pid 422] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 423] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 424 attached
) = 0
[pid 422] <... clone resumed>, parent_tid=[424], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 424
[pid 424] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 423] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 422] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 424] <... set_robust_list resumed>) = 0
[pid 422] <... futex resumed>) = 0
[pid 424] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 422] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 424] <... umount2 resumed>) = 0
[pid 424] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 422] <... futex resumed>) = 0
[pid 424] <... futex resumed>) = 1
[pid 422] exit_group(0 <unfinished ...>
[pid 424] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 422] <... exit_group resumed>) = ?
[pid 423] <... futex resumed>) = ?
[pid 424] <... futex resumed>) = ?
[pid 423] +++ exited with 0 +++
[pid 424] +++ exited with 0 +++
[pid 422] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=422, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 425
./strace-static-x86_64: Process 425 attached
[pid 425] set_robust_list(0x5555560865e0, 24) = 0
[pid 425] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 425] setpgid(0, 0) = 0
[pid 425] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 425] write(3, "1000", 4) = 4
[pid 425] close(3) = 0
[pid 425] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 425] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 425] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 425] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 426 attached
, parent_tid=[426], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 426
[pid 426] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 426] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 425] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 426] <... futex resumed>) = 0
[pid 425] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 426] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 426] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 426] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 425] <... futex resumed>) = 0
[pid 425] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 426] <... futex resumed>) = 0
[pid 426] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 425] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 426] <... mount resumed>) = 0
[pid 426] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 426] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 425] <... futex resumed>) = 0
[pid 425] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 426] <... futex resumed>) = 0
[pid 425] <... futex resumed>) = 1
[pid 426] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 425] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 426] <... mount resumed>) = 0
[pid 426] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 426] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 425] <... futex resumed>) = 0
[pid 425] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 425] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 426] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 425] <... futex resumed>) = 0
[pid 426] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 425] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 425] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 425] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 426] <... umount2 resumed>) = 0
[pid 426] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 425] <... clone resumed>, parent_tid=[427], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 427
[pid 426] <... futex resumed>) = 0
[pid 425] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 425] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 427 attached
<unfinished ...>
[pid 426] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 427] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 427] umount2("./file0", MNT_DETACH) = 0
[pid 427] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 425] <... futex resumed>) = 0
[pid 425] exit_group(0) = ?
[pid 426] <... futex resumed>) = ?
[pid 426] +++ exited with 0 +++
[pid 427] +++ exited with 0 +++
[pid 425] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=425, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 428
./strace-static-x86_64: Process 428 attached
[pid 428] set_robust_list(0x5555560865e0, 24) = 0
[pid 428] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 428] setpgid(0, 0) = 0
[pid 428] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 428] write(3, "1000", 4) = 4
[pid 428] close(3) = 0
[pid 428] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 428] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 428] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 428] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 429 attached
, parent_tid=[429], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 429
[pid 428] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 428] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 429] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 429] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 429] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 428] <... futex resumed>) = 0
[pid 428] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 428] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 429] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 429] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 428] <... futex resumed>) = 0
[pid 429] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 428] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 428] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 429] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 429] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 429] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 428] <... futex resumed>) = 0
[pid 428] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 428] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 428] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 428] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 428] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 429] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 428] <... clone resumed>, parent_tid=[430], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 430
[pid 428] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 428] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 430 attached
<unfinished ...>
[pid 430] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 430] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 429] <... umount2 resumed>) = 0
[pid 430] <... umount2 resumed>) = 0
[pid 429] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 430] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 428] <... futex resumed>) = 0
[pid 428] exit_group(0) = ?
[pid 429] <... futex resumed>) = ?
[pid 430] <... futex resumed>) = ?
[pid 430] +++ exited with 0 +++
[pid 429] +++ exited with 0 +++
[pid 428] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=428, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 431
./strace-static-x86_64: Process 431 attached
[pid 431] set_robust_list(0x5555560865e0, 24) = 0
[pid 431] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 431] setpgid(0, 0) = 0
[pid 431] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 431] write(3, "1000", 4) = 4
[pid 431] close(3) = 0
[pid 431] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 431] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 431] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 431] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 432 attached
, parent_tid=[432], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 432
[pid 432] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 431] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 432] <... set_robust_list resumed>) = 0
[pid 431] <... futex resumed>) = 0
[pid 431] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 432] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 432] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 431] <... futex resumed>) = 0
[pid 432] <... futex resumed>) = 1
[pid 431] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 432] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 431] <... futex resumed>) = 0
[pid 431] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 432] <... mount resumed>) = 0
[pid 432] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 431] <... futex resumed>) = 0
[pid 432] <... futex resumed>) = 1
[pid 431] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 432] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 431] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 432] <... mount resumed>) = 0
[pid 432] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 431] <... futex resumed>) = 0
[pid 432] <... futex resumed>) = 1
[pid 431] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 432] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 431] <... futex resumed>) = 0
[pid 431] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 431] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 431] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 431] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 432] <... umount2 resumed>) = 0
[pid 432] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 431] <... clone resumed>, parent_tid=[433], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 433
[pid 432] <... futex resumed>) = 0
[pid 431] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 432] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 431] <... futex resumed>) = 0
[pid 431] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 433 attached
<unfinished ...>
[pid 433] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 433] umount2("./file0", MNT_DETACH) = 0
[pid 433] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 431] <... futex resumed>) = 0
[pid 431] exit_group(0) = ?
[pid 432] <... futex resumed>) = ?
[pid 432] +++ exited with 0 +++
[pid 433] +++ exited with 0 +++
[pid 431] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=431, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 434 attached
<unfinished ...>
[pid 434] set_robust_list(0x5555560865e0, 24 <unfinished ...>
[pid 371] <... clone resumed>, child_tidptr=0x5555560865d0) = 434
[pid 434] <... set_robust_list resumed>) = 0
[pid 434] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 434] setpgid(0, 0) = 0
[pid 434] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 434] write(3, "1000", 4) = 4
[pid 434] close(3) = 0
[pid 434] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 434] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 434] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 434] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[435], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 435
./strace-static-x86_64: Process 435 attached
[pid 435] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 435] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 434] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 435] <... futex resumed>) = 0
[pid 435] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 435] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 435] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 434] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 434] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 435] <... futex resumed>) = 0
[pid 435] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 435] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 435] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 434] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 434] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 435] <... futex resumed>) = 0
[pid 435] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 434] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 435] <... mount resumed>) = 0
[pid 435] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 435] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 434] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 434] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 435] <... futex resumed>) = 0
[pid 435] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 434] <... futex resumed>) = 1
[pid 434] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 435] <... umount2 resumed>) = 0
[pid 434] <... futex resumed>) = 0
[pid 435] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 435] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 434] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 434] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 434] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 436 attached
, parent_tid=[436], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 436
[pid 436] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 436] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 434] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 434] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 436] <... futex resumed>) = 0
[pid 436] umount2("./file0", MNT_DETACH) = 0
[pid 436] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 436] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 434] <... futex resumed>) = 0
[pid 434] exit_group(0 <unfinished ...>
[pid 435] <... futex resumed>) = ?
[pid 434] <... exit_group resumed>) = ?
[pid 435] +++ exited with 0 +++
[pid 436] <... futex resumed>) = ?
[pid 436] +++ exited with 0 +++
[pid 434] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=434, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 437
./strace-static-x86_64: Process 437 attached
[pid 437] set_robust_list(0x5555560865e0, 24) = 0
[pid 437] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 437] setpgid(0, 0) = 0
[pid 437] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 437] write(3, "1000", 4) = 4
[pid 437] close(3) = 0
[pid 437] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 437] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 437] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 437] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 438 attached
, parent_tid=[438], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 438
[pid 438] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 437] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 438] <... set_robust_list resumed>) = 0
[pid 437] <... futex resumed>) = 0
[pid 437] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 438] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 438] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 437] <... futex resumed>) = 0
[pid 438] <... futex resumed>) = 1
[pid 437] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 438] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 437] <... futex resumed>) = 0
[pid 437] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 438] <... mount resumed>) = 0
[pid 438] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 437] <... futex resumed>) = 0
[pid 438] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 437] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 438] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 437] <... futex resumed>) = 0
[pid 438] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 437] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 438] <... mount resumed>) = 0
[pid 438] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 437] <... futex resumed>) = 0
[pid 438] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 437] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 437] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 437] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 437] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 438] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 437] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 439 attached
<unfinished ...>
[pid 438] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 437] <... clone resumed>, parent_tid=[439], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 439
[pid 437] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 437] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 438] <... umount2 resumed>) = 0
[pid 439] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 438] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 439] <... set_robust_list resumed>) = 0
[pid 438] <... futex resumed>) = 0
[pid 439] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 438] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 439] <... umount2 resumed>) = 0
[pid 439] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 437] <... futex resumed>) = 0
[pid 437] exit_group(0 <unfinished ...>
[pid 439] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 437] <... exit_group resumed>) = ?
[pid 439] <... futex resumed>) = ?
[pid 438] <... futex resumed>) = ?
[pid 438] +++ exited with 0 +++
[pid 439] +++ exited with 0 +++
[pid 437] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=437, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 440
./strace-static-x86_64: Process 440 attached
[pid 440] set_robust_list(0x5555560865e0, 24) = 0
[pid 440] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 440] setpgid(0, 0) = 0
[pid 440] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 440] write(3, "1000", 4) = 4
[pid 440] close(3) = 0
[pid 440] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 440] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 440] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 440] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[441], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 441
[pid 440] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 440] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 441 attached
<unfinished ...>
[pid 441] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 441] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 441] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 440] <... futex resumed>) = 0
[pid 440] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 440] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 441] <... futex resumed>) = 1
[pid 441] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 441] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 440] <... futex resumed>) = 0
[pid 440] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 440] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 441] <... futex resumed>) = 1
[pid 441] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 441] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 440] <... futex resumed>) = 0
[pid 440] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 440] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 440] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 440] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 440] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[442], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 442
[pid 440] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 440] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 441] <... futex resumed>) = 1
[pid 441] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 442 attached
) = 0
[pid 441] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 442] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 441] <... futex resumed>) = 0
[pid 442] <... set_robust_list resumed>) = 0
[pid 441] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 442] umount2("./file0", MNT_DETACH) = 0
[pid 442] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 440] <... futex resumed>) = 0
[pid 442] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 440] exit_group(0) = ?
[pid 442] <... futex resumed>) = ?
[pid 441] <... futex resumed>) = ?
[pid 441] +++ exited with 0 +++
[pid 442] +++ exited with 0 +++
[pid 440] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=440, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 443
./strace-static-x86_64: Process 443 attached
[pid 443] set_robust_list(0x5555560865e0, 24) = 0
[pid 443] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 443] setpgid(0, 0) = 0
[pid 443] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 443] write(3, "1000", 4) = 4
[pid 443] close(3) = 0
[pid 443] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 443] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 443] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 443] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 444 attached
, parent_tid=[444], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 444
[pid 444] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 443] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 444] <... set_robust_list resumed>) = 0
[pid 443] <... futex resumed>) = 0
[pid 443] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 444] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 444] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 443] <... futex resumed>) = 0
[pid 443] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 443] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 444] <... futex resumed>) = 1
[pid 444] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 444] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 443] <... futex resumed>) = 0
[pid 443] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 443] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 444] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 444] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 443] <... futex resumed>) = 0
[pid 444] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 443] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 443] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 443] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 443] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 443] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 444] <... umount2 resumed>) = 0
[pid 444] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 445 attached
<unfinished ...>
[pid 443] <... clone resumed>, parent_tid=[445], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 445
[pid 443] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 445] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 443] <... futex resumed>) = 0
[pid 445] <... set_robust_list resumed>) = 0
[pid 444] <... futex resumed>) = 0
[pid 443] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 445] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 444] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 445] <... umount2 resumed>) = 0
[pid 445] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 443] <... futex resumed>) = 0
[pid 445] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 443] exit_group(0 <unfinished ...>
[pid 445] <... futex resumed>) = ?
[pid 444] <... futex resumed>) = ?
[pid 443] <... exit_group resumed>) = ?
[pid 445] +++ exited with 0 +++
[pid 444] +++ exited with 0 +++
[pid 443] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=443, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 446
./strace-static-x86_64: Process 446 attached
[pid 446] set_robust_list(0x5555560865e0, 24) = 0
[pid 446] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 446] setpgid(0, 0) = 0
[pid 446] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 446] write(3, "1000", 4) = 4
[pid 446] close(3) = 0
[pid 446] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 446] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 446] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 446] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[447], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 447
[pid 446] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 446] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 447 attached
<unfinished ...>
[pid 447] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 447] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 447] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 446] <... futex resumed>) = 0
[pid 446] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 446] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 447] <... futex resumed>) = 1
[pid 447] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 447] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 446] <... futex resumed>) = 0
[pid 446] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 446] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 447] <... futex resumed>) = 1
[pid 447] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 447] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 446] <... futex resumed>) = 0
[pid 447] <... futex resumed>) = 1
[pid 446] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 447] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 446] <... futex resumed>) = 0
[pid 446] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 446] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 446] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 446] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 447] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 448 attached
[pid 447] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 446] <... clone resumed>, parent_tid=[448], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 448
[pid 448] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 447] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 448] <... set_robust_list resumed>) = 0
[pid 446] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 448] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 446] <... futex resumed>) = 0
[pid 446] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 448] <... umount2 resumed>) = 0
[pid 448] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 446] <... futex resumed>) = 0
[pid 448] <... futex resumed>) = 1
[pid 446] exit_group(0 <unfinished ...>
[pid 448] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 446] <... exit_group resumed>) = ?
[pid 447] <... futex resumed>) = -1 (errno 18446744073709551414)
[pid 448] <... futex resumed>) = ?
[pid 447] +++ exited with 0 +++
[pid 448] +++ exited with 0 +++
[pid 446] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=446, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 449
./strace-static-x86_64: Process 449 attached
[pid 449] set_robust_list(0x5555560865e0, 24) = 0
[pid 449] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 449] setpgid(0, 0) = 0
[pid 449] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 449] write(3, "1000", 4) = 4
[pid 449] close(3) = 0
[pid 449] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 449] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 449] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 449] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 450 attached
, parent_tid=[450], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 450
[pid 450] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 450] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 449] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 450] <... futex resumed>) = 0
[pid 449] <... futex resumed>) = 1
[pid 450] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 449] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 450] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 449] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 449] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 450] <... futex resumed>) = 0
[pid 450] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 449] <... futex resumed>) = 0
[pid 449] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 450] <... mount resumed>) = 0
[pid 450] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 449] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 450] <... futex resumed>) = 0
[pid 450] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 449] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 450] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 449] <... futex resumed>) = 0
[pid 450] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 449] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 450] <... mount resumed>) = 0
[pid 450] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 450] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 449] <... futex resumed>) = 0
[pid 449] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 450] <... futex resumed>) = 0
[pid 449] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 450] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 449] <... futex resumed>) = 0
[pid 449] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 449] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 449] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 450] <... umount2 resumed>) = 0
[pid 450] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 449] <... clone resumed>, parent_tid=[451], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 451
[pid 450] <... futex resumed>) = 0
[pid 449] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 449] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 450] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 451 attached
<unfinished ...>
[pid 451] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 451] umount2("./file0", MNT_DETACH) = 0
[pid 451] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 449] <... futex resumed>) = 0
[pid 451] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 449] exit_group(0) = ?
[pid 450] <... futex resumed>) = ?
[pid 450] +++ exited with 0 +++
[pid 451] <... futex resumed>) = ?
[pid 451] +++ exited with 0 +++
[pid 449] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=449, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 452
./strace-static-x86_64: Process 452 attached
[pid 452] set_robust_list(0x5555560865e0, 24) = 0
[pid 452] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 452] setpgid(0, 0) = 0
[pid 452] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 452] write(3, "1000", 4) = 4
[pid 452] close(3) = 0
[pid 452] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 452] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 452] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 452] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 453 attached
, parent_tid=[453], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 453
[pid 452] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 452] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 453] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 453] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 453] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 452] <... futex resumed>) = 0
[pid 452] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 452] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 453] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 453] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 452] <... futex resumed>) = 0
[pid 452] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 452] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 453] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 453] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 452] <... futex resumed>) = 0
[pid 452] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 452] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 452] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 453] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 452] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 452] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[454], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 454
[pid 452] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 452] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 454 attached
<unfinished ...>
[pid 454] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 453] <... umount2 resumed>) = 0
[pid 454] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 453] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 454] <... umount2 resumed>) = 0
[pid 453] <... futex resumed>) = 0
[pid 454] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 452] <... futex resumed>) = 0
[pid 452] exit_group(0 <unfinished ...>
[pid 453] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 452] <... exit_group resumed>) = ?
[pid 454] <... futex resumed>) = ?
[pid 453] <... futex resumed>) = ?
[pid 454] +++ exited with 0 +++
[pid 453] +++ exited with 0 +++
[pid 452] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=452, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 455 attached
, child_tidptr=0x5555560865d0) = 455
[pid 455] set_robust_list(0x5555560865e0, 24) = 0
[pid 455] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 455] setpgid(0, 0) = 0
[pid 455] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 455] write(3, "1000", 4) = 4
[pid 455] close(3) = 0
[pid 455] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 455] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 455] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 455] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[456], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 456
[pid 455] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 455] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 456 attached
<unfinished ...>
[pid 456] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 456] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 456] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 455] <... futex resumed>) = 0
[pid 455] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 455] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 456] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 456] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 455] <... futex resumed>) = 0
[pid 455] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 455] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 456] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 456] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 455] <... futex resumed>) = 0
[pid 455] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 455] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 455] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 456] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 455] <... mmap resumed>) = 0x7f236e446000
[pid 455] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 455] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[457], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 457
[pid 456] <... umount2 resumed>) = 0
[pid 455] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 455] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 457 attached
<unfinished ...>
[pid 457] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 457] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 456] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 457] <... umount2 resumed>) = 0
[pid 457] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 455] <... futex resumed>) = 0
[pid 455] exit_group(0 <unfinished ...>
[pid 456] <... futex resumed>) = 0
[pid 455] <... exit_group resumed>) = ?
[pid 457] <... futex resumed>) = ?
[pid 457] +++ exited with 0 +++
[pid 456] +++ exited with 0 +++
[pid 455] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=455, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 458
./strace-static-x86_64: Process 458 attached
[pid 458] set_robust_list(0x5555560865e0, 24) = 0
[pid 458] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 458] setpgid(0, 0) = 0
[pid 458] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 458] write(3, "1000", 4) = 4
[pid 458] close(3) = 0
[pid 458] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 458] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 458] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 458] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[459], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 459
[pid 458] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 458] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 459 attached
<unfinished ...>
[pid 459] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 459] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 459] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 458] <... futex resumed>) = 0
[pid 458] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 458] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 459] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 459] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 458] <... futex resumed>) = 0
[pid 459] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 458] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 458] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 459] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 459] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 459] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 458] <... futex resumed>) = 0
[pid 458] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 458] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 459] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 458] <... futex resumed>) = 0
[pid 459] <... umount2 resumed>) = 0
[pid 458] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 458] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 458] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[460], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 460
./strace-static-x86_64: Process 460 attached
[pid 459] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 458] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 458] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 460] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 459] <... futex resumed>) = 0
[pid 460] <... set_robust_list resumed>) = 0
[pid 459] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 460] umount2("./file0", MNT_DETACH) = 0
[pid 460] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 458] <... futex resumed>) = 0
[pid 458] exit_group(0) = ?
[pid 459] <... futex resumed>) = ?
[pid 459] +++ exited with 0 +++
[pid 460] +++ exited with 0 +++
[pid 458] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=458, si_uid=0, si_status=0, si_utime=0, si_stime=1} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 461
./strace-static-x86_64: Process 461 attached
[pid 461] set_robust_list(0x5555560865e0, 24) = 0
[pid 461] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 461] setpgid(0, 0) = 0
[pid 461] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 461] write(3, "1000", 4) = 4
[pid 461] close(3) = 0
[pid 461] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 461] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 461] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 461] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 462 attached
, parent_tid=[462], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 462
[pid 462] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 462] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 461] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 462] <... futex resumed>) = 0
[pid 462] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 461] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 462] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 462] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 461] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 461] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 462] <... futex resumed>) = 0
[pid 462] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 461] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 462] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 461] <... futex resumed>) = 0
[pid 461] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 461] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 462] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 462] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 461] <... futex resumed>) = 0
[pid 462] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 461] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 462] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 461] <... futex resumed>) = 0
[pid 462] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 461] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 462] <... umount2 resumed>) = 0
[pid 461] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 462] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 461] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 462] <... futex resumed>) = 0
[pid 462] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 461] <... mprotect resumed>) = 0
[pid 461] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 463 attached
<unfinished ...>
[pid 463] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 463] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 461] <... clone resumed>, parent_tid=[463], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 463
[pid 461] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 463] <... futex resumed>) = 0
[pid 461] <... futex resumed>) = 1
[pid 463] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 461] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 463] <... umount2 resumed>) = 0
[pid 463] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 461] <... futex resumed>) = 0
[pid 463] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 461] exit_group(0) = ?
[pid 462] <... futex resumed>) = ?
[pid 463] <... futex resumed>) = ?
[pid 463] +++ exited with 0 +++
[pid 462] +++ exited with 0 +++
[pid 461] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=461, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 464
./strace-static-x86_64: Process 464 attached
[pid 464] set_robust_list(0x5555560865e0, 24) = 0
[pid 464] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 464] setpgid(0, 0) = 0
[pid 464] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 464] write(3, "1000", 4) = 4
[pid 464] close(3) = 0
[pid 464] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 464] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 464] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 464] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 465 attached
, parent_tid=[465], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 465
[pid 465] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 464] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 465] <... set_robust_list resumed>) = 0
[pid 464] <... futex resumed>) = 0
[pid 464] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 465] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 465] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 464] <... futex resumed>) = 0
[pid 465] <... futex resumed>) = 1
[pid 464] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 465] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 464] <... futex resumed>) = 0
[pid 464] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 465] <... mount resumed>) = 0
[pid 465] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 464] <... futex resumed>) = 0
[pid 465] <... futex resumed>) = 1
[pid 464] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 465] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 464] <... futex resumed>) = 0
[pid 464] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 465] <... mount resumed>) = 0
[pid 465] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 464] <... futex resumed>) = 0
[pid 464] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 465] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 464] <... futex resumed>) = 0
[pid 464] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 464] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 464] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 464] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 465] <... umount2 resumed>) = 0
[pid 464] <... clone resumed>, parent_tid=[466], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 466
[pid 465] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 464] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 465] <... futex resumed>) = 0
[pid 464] <... futex resumed>) = 0
[pid 465] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 464] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 466 attached
<unfinished ...>
[pid 466] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 466] umount2("./file0", MNT_DETACH) = 0
[pid 466] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 464] <... futex resumed>) = 0
[pid 464] exit_group(0) = ?
[pid 465] <... futex resumed>) = ?
[pid 465] +++ exited with 0 +++
[pid 466] +++ exited with 0 +++
[pid 464] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=464, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 467
./strace-static-x86_64: Process 467 attached
[pid 467] set_robust_list(0x5555560865e0, 24) = 0
[pid 467] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 467] setpgid(0, 0) = 0
[pid 467] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 467] write(3, "1000", 4) = 4
[pid 467] close(3) = 0
[pid 467] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 467] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 467] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 467] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[468], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 468
[pid 467] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 467] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 468 attached
<unfinished ...>
[pid 468] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 468] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 468] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 467] <... futex resumed>) = 0
[pid 467] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 467] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 468] <... futex resumed>) = 1
[pid 468] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 468] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 467] <... futex resumed>) = 0
[pid 467] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 467] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 468] <... futex resumed>) = 1
[pid 468] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 468] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 467] <... futex resumed>) = 0
[pid 467] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 467] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 467] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 467] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 467] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[469], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 469
[pid 467] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 467] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 468] <... futex resumed>) = 1
[pid 468] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 469 attached
) = 0
[pid 468] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 468] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 469] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 469] umount2("./file0", MNT_DETACH) = 0
[pid 469] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 467] <... futex resumed>) = 0
[pid 467] exit_group(0) = ?
[pid 468] <... futex resumed>) = ?
[pid 468] +++ exited with 0 +++
[pid 469] <... futex resumed>) = ?
[pid 469] +++ exited with 0 +++
[pid 467] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=467, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 470
./strace-static-x86_64: Process 470 attached
[pid 470] set_robust_list(0x5555560865e0, 24) = 0
[pid 470] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 470] setpgid(0, 0) = 0
[pid 470] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 470] write(3, "1000", 4) = 4
[pid 470] close(3) = 0
[pid 470] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 470] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 470] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 470] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 471 attached
, parent_tid=[471], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 471
[pid 471] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 470] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 471] <... set_robust_list resumed>) = 0
[pid 470] <... futex resumed>) = 0
[pid 470] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 471] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 471] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 470] <... futex resumed>) = 0
[pid 471] <... futex resumed>) = 1
[pid 470] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 471] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 470] <... futex resumed>) = 0
[pid 470] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 471] <... mount resumed>) = 0
[pid 471] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 470] <... futex resumed>) = 0
[pid 471] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 470] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 471] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 470] <... futex resumed>) = 0
[pid 470] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 471] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 471] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 470] <... futex resumed>) = 0
[pid 471] <... futex resumed>) = 1
[pid 470] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 471] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 470] <... futex resumed>) = 0
[pid 470] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 470] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 471] <... umount2 resumed>) = 0
[pid 470] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 471] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 470] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 471] <... futex resumed>) = 0
[pid 471] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 470] <... clone resumed>, parent_tid=[472], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 472
[pid 470] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 470] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 472 attached
<unfinished ...>
[pid 472] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 472] umount2("./file0", MNT_DETACH) = 0
[pid 472] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 470] <... futex resumed>) = 0
[pid 472] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 470] exit_group(0 <unfinished ...>
[pid 471] <... futex resumed>) = ?
[pid 470] <... exit_group resumed>) = ?
[pid 472] <... futex resumed>) = ?
[pid 472] +++ exited with 0 +++
[pid 471] +++ exited with 0 +++
[pid 470] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=470, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 473
./strace-static-x86_64: Process 473 attached
[pid 473] set_robust_list(0x5555560865e0, 24) = 0
[pid 473] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 473] setpgid(0, 0) = 0
[pid 473] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 473] write(3, "1000", 4) = 4
[pid 473] close(3) = 0
[pid 473] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 473] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 473] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 473] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 474 attached
, parent_tid=[474], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 474
[pid 474] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 474] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 473] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 474] <... futex resumed>) = 0
[pid 474] mkdir("./file0", 000 <unfinished ...>
[pid 473] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 474] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 474] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 473] <... futex resumed>) = 0
[pid 474] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 473] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 474] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 473] <... futex resumed>) = 0
[pid 474] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 473] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 474] <... mount resumed>) = 0
[pid 474] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 473] <... futex resumed>) = 0
[pid 473] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 474] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 473] <... futex resumed>) = 0
[pid 473] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 474] <... mount resumed>) = 0
[pid 474] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 473] <... futex resumed>) = 0
[pid 474] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 473] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 473] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 473] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 474] <... umount2 resumed>) = 0
[pid 474] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 473] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 474] <... futex resumed>) = 0
[pid 473] <... mprotect resumed>) = 0
[pid 474] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 473] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 475 attached
, parent_tid=[475], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 475
[pid 475] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 475] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 473] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 475] <... futex resumed>) = 0
[pid 475] umount2("./file0", MNT_DETACH) = 0
[pid 475] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 473] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 475] <... futex resumed>) = 0
[pid 475] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 473] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 473] exit_group(0 <unfinished ...>
[pid 474] <... futex resumed>) = 231
[pid 473] <... exit_group resumed>) = ?
[pid 475] <... futex resumed>) = ?
[pid 475] +++ exited with 0 +++
[pid 474] +++ exited with 0 +++
[pid 473] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=473, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 476
./strace-static-x86_64: Process 476 attached
[pid 476] set_robust_list(0x5555560865e0, 24) = 0
[pid 476] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 476] setpgid(0, 0) = 0
[pid 476] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 476] write(3, "1000", 4) = 4
[pid 476] close(3) = 0
[pid 476] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 476] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 476] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 476] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[477], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 477
[pid 476] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 476] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 477 attached
<unfinished ...>
[pid 477] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 477] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 477] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 476] <... futex resumed>) = 0
[pid 476] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 476] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 477] <... futex resumed>) = 1
[pid 477] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 477] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 476] <... futex resumed>) = 0
[pid 476] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 476] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 477] <... futex resumed>) = 1
[pid 477] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 477] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 476] <... futex resumed>) = 0
[pid 476] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 476] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 476] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 476] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 476] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 478 attached
, parent_tid=[478], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 478
[pid 476] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 476] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 477] <... futex resumed>) = 1
[pid 477] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 478] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 477] <... umount2 resumed>) = 0
[pid 478] <... set_robust_list resumed>) = 0
[pid 477] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 477] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 478] umount2("./file0", MNT_DETACH) = 0
[pid 478] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 476] <... futex resumed>) = 0
[pid 476] exit_group(0) = ?
[pid 478] +++ exited with 0 +++
[pid 477] <... futex resumed>) = ?
[pid 477] +++ exited with 0 +++
[pid 476] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=476, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 479
./strace-static-x86_64: Process 479 attached
[pid 479] set_robust_list(0x5555560865e0, 24) = 0
[pid 479] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 479] setpgid(0, 0) = 0
[pid 479] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 479] write(3, "1000", 4) = 4
[pid 479] close(3) = 0
[pid 479] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 479] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 479] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 479] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 480 attached
, parent_tid=[480], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 480
[pid 480] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 480] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 479] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 480] <... futex resumed>) = 0
[pid 480] mkdir("./file0", 000 <unfinished ...>
[pid 479] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 480] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 480] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 479] <... futex resumed>) = 0
[pid 479] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 479] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 480] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 480] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 479] <... futex resumed>) = 0
[pid 480] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 479] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 479] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 480] <... mount resumed>) = 0
[pid 480] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 479] <... futex resumed>) = 0
[pid 479] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 479] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 480] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 479] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 479] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 479] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[481], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 481
[pid 479] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 479] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 480] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 481 attached
[pid 480] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 481] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 480] <... futex resumed>) = 0
[pid 481] <... set_robust_list resumed>) = 0
[pid 480] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 481] umount2("./file0", MNT_DETACH) = 0
[pid 481] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 479] <... futex resumed>) = 0
[pid 479] exit_group(0 <unfinished ...>
[pid 480] <... futex resumed>) = ?
[pid 479] <... exit_group resumed>) = ?
[pid 480] +++ exited with 0 +++
[pid 481] +++ exited with 0 +++
[pid 479] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=479, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 482 attached
, child_tidptr=0x5555560865d0) = 482
[pid 482] set_robust_list(0x5555560865e0, 24) = 0
[pid 482] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 482] setpgid(0, 0) = 0
[pid 482] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 482] write(3, "1000", 4) = 4
[pid 482] close(3) = 0
[pid 482] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 482] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 482] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 482] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 483 attached
<unfinished ...>
[pid 483] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 482] <... clone resumed>, parent_tid=[483], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 483
[pid 483] <... set_robust_list resumed>) = 0
[pid 483] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 482] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 482] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 483] <... futex resumed>) = 0
[pid 483] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 483] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 482] <... futex resumed>) = 0
[pid 482] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 482] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 483] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 483] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 482] <... futex resumed>) = 0
[pid 482] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 482] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 483] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 483] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 482] <... futex resumed>) = 0
[pid 482] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 482] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 482] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 482] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 482] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[484], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 484
[pid 482] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 482] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 483] umount2("./file0", MNT_DETACH) = 0
[pid 483] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 483] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 484 attached
<unfinished ...>
[pid 484] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 484] umount2("./file0", MNT_DETACH) = 0
[pid 484] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 482] <... futex resumed>) = 0
[pid 482] exit_group(0) = ?
[pid 483] <... futex resumed>) = ?
[pid 483] +++ exited with 0 +++
[pid 484] +++ exited with 0 +++
[pid 482] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=482, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 485
./strace-static-x86_64: Process 485 attached
[pid 485] set_robust_list(0x5555560865e0, 24) = 0
[pid 485] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 485] setpgid(0, 0) = 0
[pid 485] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 485] write(3, "1000", 4) = 4
[pid 485] close(3) = 0
[pid 485] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 485] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 485] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 485] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[486], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 486
[pid 485] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 485] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 486 attached
<unfinished ...>
[pid 486] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 486] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 486] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 485] <... futex resumed>) = 0
[pid 485] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 485] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 486] <... futex resumed>) = 1
[pid 486] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 486] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 485] <... futex resumed>) = 0
[pid 485] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 485] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 486] <... futex resumed>) = 1
[pid 486] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 486] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 485] <... futex resumed>) = 0
[pid 485] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 485] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 485] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 485] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 485] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[487], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 487
[pid 485] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 485] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 486] <... futex resumed>) = 1
[pid 486] umount2("./file0", MNT_DETACH) = 0
[pid 486] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 486] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 487 attached
<unfinished ...>
[pid 487] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 487] umount2("./file0", MNT_DETACH) = 0
[pid 487] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 485] <... futex resumed>) = 0
[pid 485] exit_group(0) = ?
[pid 486] <... futex resumed>) = ?
[pid 486] +++ exited with 0 +++
[pid 487] <... futex resumed>) = ?
[pid 487] +++ exited with 0 +++
[pid 485] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=485, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 488
./strace-static-x86_64: Process 488 attached
[pid 488] set_robust_list(0x5555560865e0, 24) = 0
[pid 488] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 488] setpgid(0, 0) = 0
[pid 488] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 488] write(3, "1000", 4) = 4
[pid 488] close(3) = 0
[pid 488] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 488] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 488] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 488] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[489], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 489
[pid 488] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 488] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 489 attached
<unfinished ...>
[pid 489] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 489] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 489] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 488] <... futex resumed>) = 0
[pid 488] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 488] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 489] <... futex resumed>) = 1
[pid 489] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 489] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 488] <... futex resumed>) = 0
[pid 489] <... futex resumed>) = 1
[pid 488] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 489] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 488] <... futex resumed>) = 0
[pid 488] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 489] <... mount resumed>) = 0
[pid 489] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 488] <... futex resumed>) = 0
[pid 489] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 488] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 489] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 488] <... futex resumed>) = 0
[pid 488] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 489] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 488] <... futex resumed>) = 0
[pid 488] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 488] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 488] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 489] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 490 attached
[pid 489] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 488] <... clone resumed>, parent_tid=[490], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 490
[pid 490] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 489] <... futex resumed>) = 0
[pid 488] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 489] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 490] <... set_robust_list resumed>) = 0
[pid 488] <... futex resumed>) = 0
[pid 490] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 488] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 490] <... umount2 resumed>) = 0
[pid 490] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 488] <... futex resumed>) = 0
[pid 490] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 488] exit_group(0) = ?
[pid 489] <... futex resumed>) = ?
[pid 490] <... futex resumed>) = ?
[pid 489] +++ exited with 0 +++
[pid 490] +++ exited with 0 +++
[pid 488] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=488, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 491 attached
, child_tidptr=0x5555560865d0) = 491
[pid 491] set_robust_list(0x5555560865e0, 24) = 0
[pid 491] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 491] setpgid(0, 0) = 0
[pid 491] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 491] write(3, "1000", 4) = 4
[pid 491] close(3) = 0
[pid 491] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 491] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 491] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 491] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[492], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 492
./strace-static-x86_64: Process 492 attached
[pid 491] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 492] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 492] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 492] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 492] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 491] <... futex resumed>) = 1
[pid 492] <... futex resumed>) = 0
[pid 492] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 491] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 491] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 492] <... futex resumed>) = 0
[pid 491] <... futex resumed>) = 1
[pid 492] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 491] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 492] <... mount resumed>) = 0
[pid 492] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 491] <... futex resumed>) = 0
[pid 492] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 491] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 492] <... futex resumed>) = 0
[pid 491] <... futex resumed>) = 1
[pid 492] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 491] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 492] <... mount resumed>) = 0
[pid 492] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 491] <... futex resumed>) = 0
[pid 492] <... futex resumed>) = 1
[pid 491] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 492] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 491] <... futex resumed>) = 0
[pid 491] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 491] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 491] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 492] <... umount2 resumed>) = 0
[pid 491] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 492] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 493 attached
) = 0
[pid 493] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 492] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 491] <... clone resumed>, parent_tid=[493], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 493
[pid 493] <... set_robust_list resumed>) = 0
[pid 491] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 493] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 491] <... futex resumed>) = 0
[pid 491] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 493] <... umount2 resumed>) = 0
[pid 493] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 491] <... futex resumed>) = 0
[pid 493] <... futex resumed>) = 1
[pid 493] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 491] exit_group(0) = ?
[pid 492] <... futex resumed>) = 231
[pid 493] <... futex resumed>) = ?
[pid 492] +++ exited with 0 +++
[pid 493] +++ exited with 0 +++
[pid 491] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=491, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 494
./strace-static-x86_64: Process 494 attached
[pid 494] set_robust_list(0x5555560865e0, 24) = 0
[pid 494] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 494] setpgid(0, 0) = 0
[pid 494] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 494] write(3, "1000", 4) = 4
[pid 494] close(3) = 0
[pid 494] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 494] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 494] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 494] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 495 attached
, parent_tid=[495], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 495
[pid 495] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 494] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 495] <... set_robust_list resumed>) = 0
[pid 494] <... futex resumed>) = 0
[pid 494] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 495] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 495] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 494] <... futex resumed>) = 0
[pid 495] <... futex resumed>) = 1
[pid 494] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 495] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 494] <... futex resumed>) = 0
[pid 494] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 495] <... mount resumed>) = 0
[pid 495] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 494] <... futex resumed>) = 0
[pid 495] <... futex resumed>) = 1
[pid 494] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 495] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 494] <... futex resumed>) = 0
[pid 494] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 495] <... mount resumed>) = 0
[pid 495] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 494] <... futex resumed>) = 0
[pid 495] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 494] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 495] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 494] <... futex resumed>) = 0
[pid 495] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 494] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 494] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 494] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 494] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[496], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 496
./strace-static-x86_64: Process 496 attached
[pid 495] <... umount2 resumed>) = 0
[pid 494] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 496] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 495] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 494] <... futex resumed>) = 0
[pid 496] <... set_robust_list resumed>) = 0
[pid 495] <... futex resumed>) = 0
[pid 494] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 496] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 495] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 496] <... umount2 resumed>) = 0
[pid 496] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 494] <... futex resumed>) = 0
[pid 494] exit_group(0) = ?
[pid 495] <... futex resumed>) = ?
[pid 495] +++ exited with 0 +++
[pid 496] +++ exited with 0 +++
[pid 494] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=494, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 497 attached
, child_tidptr=0x5555560865d0) = 497
[pid 497] set_robust_list(0x5555560865e0, 24) = 0
[pid 497] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 497] setpgid(0, 0) = 0
[pid 497] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 497] write(3, "1000", 4) = 4
[pid 497] close(3) = 0
[pid 497] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 497] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 497] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 497] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 498 attached
, parent_tid=[498], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 498
[pid 498] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 497] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 498] <... set_robust_list resumed>) = 0
[pid 497] <... futex resumed>) = 0
[pid 497] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 498] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 498] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 497] <... futex resumed>) = 0
[pid 498] <... futex resumed>) = 1
[pid 497] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 498] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 497] <... futex resumed>) = 0
[pid 497] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 498] <... mount resumed>) = 0
[pid 498] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 497] <... futex resumed>) = 0
[pid 498] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 497] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 497] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 498] <... mount resumed>) = 0
[pid 498] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 497] <... futex resumed>) = 0
[pid 497] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 498] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 497] <... futex resumed>) = 0
[pid 497] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 498] <... umount2 resumed>) = 0
[pid 497] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 498] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 497] <... mmap resumed>) = 0x7f236e446000
[pid 498] <... futex resumed>) = 0
[pid 497] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 498] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 497] <... mprotect resumed>) = 0
[pid 497] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[499], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 499
[pid 497] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 499 attached
[pid 497] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 499] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 499] umount2("./file0", MNT_DETACH) = 0
[pid 499] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 497] <... futex resumed>) = 0
[pid 497] exit_group(0) = ?
[pid 498] <... futex resumed>) = ?
[pid 498] +++ exited with 0 +++
[pid 499] +++ exited with 0 +++
[pid 497] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=497, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 500
./strace-static-x86_64: Process 500 attached
[pid 500] set_robust_list(0x5555560865e0, 24) = 0
[pid 500] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 500] setpgid(0, 0) = 0
[pid 500] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 500] write(3, "1000", 4) = 4
[pid 500] close(3) = 0
[pid 500] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 500] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 500] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 500] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[501], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 501
./strace-static-x86_64: Process 501 attached
[pid 501] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 501] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 500] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 501] <... futex resumed>) = 0
[pid 501] mkdir("./file0", 000 <unfinished ...>
[pid 500] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 501] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 501] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 501] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 500] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 500] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 501] <... futex resumed>) = 0
[pid 501] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 500] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 501] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 501] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 500] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 500] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 501] <... futex resumed>) = 0
[pid 501] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 500] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 501] <... mount resumed>) = 0
[pid 501] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 501] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 500] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 500] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 501] <... futex resumed>) = 0
[pid 501] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 500] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 501] <... umount2 resumed>) = 0
[pid 501] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 501] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 500] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 500] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 500] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 502 attached
, parent_tid=[502], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 502
[pid 502] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 502] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 500] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 502] <... futex resumed>) = 0
[pid 502] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 500] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 502] <... umount2 resumed>) = 0
[pid 502] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 502] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 500] <... futex resumed>) = 0
[pid 500] exit_group(0 <unfinished ...>
[pid 501] <... futex resumed>) = ?
[pid 500] <... exit_group resumed>) = ?
[pid 501] +++ exited with 0 +++
[pid 502] <... futex resumed>) = ?
[pid 502] +++ exited with 0 +++
[pid 500] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=500, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 503
./strace-static-x86_64: Process 503 attached
[pid 503] set_robust_list(0x5555560865e0, 24) = 0
[pid 503] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 503] setpgid(0, 0) = 0
[pid 503] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 503] write(3, "1000", 4) = 4
[pid 503] close(3) = 0
[pid 503] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 503] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 503] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 503] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 504 attached
, parent_tid=[504], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 504
[pid 503] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 503] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 504] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 504] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 504] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 503] <... futex resumed>) = 0
[pid 503] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 503] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 504] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 504] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 503] <... futex resumed>) = 0
[pid 503] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 503] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 504] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 504] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 503] <... futex resumed>) = 0
[pid 503] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 503] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 503] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 503] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 503] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 505 attached
, parent_tid=[505], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 505
[pid 505] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 503] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 505] <... set_robust_list resumed>) = 0
[pid 503] <... futex resumed>) = 0
[pid 505] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 503] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 504] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 505] <... umount2 resumed>) = 0
[pid 505] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 505] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 503] <... futex resumed>) = 0
[pid 504] <... umount2 resumed>) = 0
[pid 504] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 503] exit_group(0 <unfinished ...>
[pid 504] ????( <unfinished ...>
[pid 503] <... exit_group resumed>) = ?
[pid 505] <... futex resumed>) = ?
[pid 505] +++ exited with 0 +++
[pid 504] <... ???? resumed>) = ?
[pid 504] +++ exited with 0 +++
[pid 503] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=503, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 506
./strace-static-x86_64: Process 506 attached
[pid 506] set_robust_list(0x5555560865e0, 24) = 0
[pid 506] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 506] setpgid(0, 0) = 0
[pid 506] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 506] write(3, "1000", 4) = 4
[pid 506] close(3) = 0
[pid 506] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 506] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 506] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 506] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 507 attached
, parent_tid=[507], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 507
[pid 507] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 506] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 507] <... set_robust_list resumed>) = 0
[pid 506] <... futex resumed>) = 0
[pid 506] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 507] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 507] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 506] <... futex resumed>) = 0
[pid 507] <... futex resumed>) = 1
[pid 506] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 507] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 506] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 507] <... mount resumed>) = 0
[pid 507] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 506] <... futex resumed>) = 0
[pid 507] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 506] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 507] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 506] <... futex resumed>) = 0
[pid 507] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 506] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 507] <... mount resumed>) = 0
[pid 507] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 506] <... futex resumed>) = 0
[pid 507] <... futex resumed>) = 1
[pid 506] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 507] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 506] <... futex resumed>) = 0
[pid 506] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 506] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 506] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 507] <... umount2 resumed>) = 0
[pid 506] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 507] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 508 attached
) = 0
[pid 507] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 506] <... clone resumed>, parent_tid=[508], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 508
[pid 508] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 506] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 508] <... set_robust_list resumed>) = 0
[pid 506] <... futex resumed>) = 0
[pid 508] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 506] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 508] <... umount2 resumed>) = 0
[pid 508] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 506] <... futex resumed>) = 0
[pid 508] <... futex resumed>) = 1
[pid 506] exit_group(0 <unfinished ...>
[pid 508] ????( <unfinished ...>
[pid 506] <... exit_group resumed>) = ?
[pid 508] <... ???? resumed>) = ?
[pid 507] <... futex resumed>) = ?
[pid 507] +++ exited with 0 +++
[pid 508] +++ exited with 0 +++
[pid 506] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=506, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 509
./strace-static-x86_64: Process 509 attached
[pid 509] set_robust_list(0x5555560865e0, 24) = 0
[pid 509] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 509] setpgid(0, 0) = 0
[pid 509] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 509] write(3, "1000", 4) = 4
[pid 509] close(3) = 0
[pid 509] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 509] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 509] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 509] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 510 attached
, parent_tid=[510], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 510
[pid 510] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 509] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 510] <... set_robust_list resumed>) = 0
[pid 509] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 510] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 510] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 509] <... futex resumed>) = 0
[pid 510] <... futex resumed>) = 1
[pid 509] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 510] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 509] <... futex resumed>) = 0
[pid 509] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 510] <... mount resumed>) = 0
[pid 510] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 509] <... futex resumed>) = 0
[pid 510] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 509] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 510] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 509] <... futex resumed>) = 0
[pid 509] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 510] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 510] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 509] <... futex resumed>) = 0
[pid 510] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 509] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 509] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 509] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 509] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 510] <... umount2 resumed>) = 0
[pid 509] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 510] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 510] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 511 attached
<unfinished ...>
[pid 511] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 509] <... clone resumed>, parent_tid=[511], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 511
[pid 511] <... set_robust_list resumed>) = 0
[pid 509] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 511] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 509] <... futex resumed>) = 0
[pid 509] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 511] <... umount2 resumed>) = 0
[pid 511] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 511] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 509] <... futex resumed>) = 0
[pid 509] exit_group(0) = ?
[pid 510] <... futex resumed>) = ?
[pid 511] <... futex resumed>) = 231
[pid 510] +++ exited with 0 +++
[pid 511] +++ exited with 0 +++
[pid 509] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=509, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 512
./strace-static-x86_64: Process 512 attached
[pid 512] set_robust_list(0x5555560865e0, 24) = 0
[pid 512] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 512] setpgid(0, 0) = 0
[pid 512] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 512] write(3, "1000", 4) = 4
[pid 512] close(3) = 0
[pid 512] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 512] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 512] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 512] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[513], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 513
./strace-static-x86_64: Process 513 attached
[pid 513] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 513] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 512] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 513] <... futex resumed>) = 0
[pid 512] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 513] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 513] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 513] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 512] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 512] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 512] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 513] <... futex resumed>) = 0
[pid 513] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 513] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 513] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 512] <... futex resumed>) = 0
[pid 512] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 513] <... futex resumed>) = 0
[pid 513] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 512] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 513] <... mount resumed>) = 0
[pid 513] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 513] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 512] <... futex resumed>) = 0
[pid 512] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 513] <... futex resumed>) = 0
[pid 513] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 512] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 513] <... umount2 resumed>) = 0
[pid 512] <... futex resumed>) = 0
[pid 513] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 513] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 512] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 512] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 512] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 514 attached
, parent_tid=[514], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 514
[pid 514] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 512] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 514] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 512] <... futex resumed>) = 0
[pid 512] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 514] <... umount2 resumed>) = 0
[pid 514] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 512] <... futex resumed>) = 0
[pid 512] exit_group(0) = ?
[pid 513] <... futex resumed>) = ?
[pid 513] +++ exited with 0 +++
[pid 514] +++ exited with 0 +++
[pid 512] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=512, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 515
./strace-static-x86_64: Process 515 attached
[pid 515] set_robust_list(0x5555560865e0, 24) = 0
[pid 515] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 515] setpgid(0, 0) = 0
[pid 515] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 515] write(3, "1000", 4) = 4
[pid 515] close(3) = 0
[pid 515] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 515] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 515] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 515] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 516 attached
<unfinished ...>
[pid 516] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 516] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 515] <... clone resumed>, parent_tid=[516], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 516
[pid 515] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 516] <... futex resumed>) = 0
[pid 516] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 516] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 516] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 515] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 515] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 516] <... futex resumed>) = 0
[pid 516] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 516] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 516] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 515] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 515] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 516] <... futex resumed>) = 0
[pid 516] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 515] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 516] <... mount resumed>) = 0
[pid 516] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 516] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 515] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 515] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 516] <... futex resumed>) = 0
[pid 516] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 515] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 516] <... umount2 resumed>) = 0
[pid 516] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 516] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 515] <... futex resumed>) = 0
[pid 515] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 515] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 515] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 517 attached
, parent_tid=[517], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 517
[pid 517] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 515] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 517] <... set_robust_list resumed>) = 0
[pid 517] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 515] <... futex resumed>) = 0
[pid 517] <... umount2 resumed>) = 0
[pid 515] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 517] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 517] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 515] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 515] exit_group(0 <unfinished ...>
[pid 516] <... futex resumed>) = ?
[pid 515] <... exit_group resumed>) = ?
[pid 516] +++ exited with 0 +++
[pid 517] <... futex resumed>) = ?
[pid 517] +++ exited with 0 +++
[pid 515] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=515, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 518
./strace-static-x86_64: Process 518 attached
[pid 518] set_robust_list(0x5555560865e0, 24) = 0
[pid 518] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 518] setpgid(0, 0) = 0
[pid 518] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 518] write(3, "1000", 4) = 4
[pid 518] close(3) = 0
[pid 518] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 518] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 518] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 518] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[519], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 519
./strace-static-x86_64: Process 519 attached
[pid 518] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 519] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 519] mkdir("./file0", 000 <unfinished ...>
[pid 518] <... futex resumed>) = 0
[pid 519] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 519] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 518] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 519] <... futex resumed>) = 0
[pid 518] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 519] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 518] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 519] <... futex resumed>) = 0
[pid 518] <... futex resumed>) = 1
[pid 519] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 518] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 519] <... mount resumed>) = 0
[pid 519] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 518] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 519] <... futex resumed>) = 0
[pid 518] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 519] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 518] <... futex resumed>) = 0
[pid 518] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 519] <... mount resumed>) = 0
[pid 519] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 518] <... futex resumed>) = 0
[pid 518] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 518] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 518] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 518] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 518] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[520], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 520
[pid 518] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 518] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 520 attached
<unfinished ...>
[pid 520] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 520] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 519] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 520] <... umount2 resumed>) = 0
[pid 520] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 518] <... futex resumed>) = 0
[pid 520] <... futex resumed>) = 1
[pid 520] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 519] <... umount2 resumed>) = 0
[pid 519] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 519] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 518] exit_group(0) = ?
[pid 519] <... futex resumed>) = ?
[pid 520] <... futex resumed>) = ?
[pid 519] +++ exited with 0 +++
[pid 520] +++ exited with 0 +++
[pid 518] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=518, si_uid=0, si_status=0, si_utime=0, si_stime=1} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 521
./strace-static-x86_64: Process 521 attached
[pid 521] set_robust_list(0x5555560865e0, 24) = 0
[pid 521] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 521] setpgid(0, 0) = 0
[pid 521] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 521] write(3, "1000", 4) = 4
[pid 521] close(3) = 0
[pid 521] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 521] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 521] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 521] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 522 attached
, parent_tid=[522], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 522
[pid 522] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 521] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 522] <... set_robust_list resumed>) = 0
[pid 521] <... futex resumed>) = 0
[pid 521] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 522] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 522] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 521] <... futex resumed>) = 0
[pid 522] <... futex resumed>) = 1
[pid 521] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 522] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 521] <... futex resumed>) = 0
[pid 521] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 522] <... mount resumed>) = 0
[pid 522] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 521] <... futex resumed>) = 0
[pid 521] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 522] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 521] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 522] <... mount resumed>) = 0
[pid 522] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 521] <... futex resumed>) = 0
[pid 521] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 521] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 521] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 521] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 521] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 522] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 521] <... clone resumed>, parent_tid=[523], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 523
[pid 521] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 521] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 522] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 523 attached
[pid 522] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 523] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 523] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 522] <... futex resumed>) = 0
[pid 522] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 523] <... umount2 resumed>) = 0
[pid 523] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 521] <... futex resumed>) = 0
[pid 521] exit_group(0) = ?
[pid 522] <... futex resumed>) = ?
[pid 522] +++ exited with 0 +++
[pid 523] +++ exited with 0 +++
[pid 521] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=521, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 524 attached
, child_tidptr=0x5555560865d0) = 524
[pid 524] set_robust_list(0x5555560865e0, 24) = 0
[pid 524] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 524] setpgid(0, 0) = 0
[pid 524] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 524] write(3, "1000", 4) = 4
[pid 524] close(3) = 0
[pid 524] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 524] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 524] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 524] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[525], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 525
[pid 524] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 524] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 525 attached
<unfinished ...>
[pid 525] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 525] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 525] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 524] <... futex resumed>) = 0
[pid 524] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 524] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 525] <... futex resumed>) = 1
[pid 525] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 525] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 524] <... futex resumed>) = 0
[pid 524] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 524] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 525] <... futex resumed>) = 1
[pid 525] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 525] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 524] <... futex resumed>) = 0
[pid 525] <... futex resumed>) = 1
[pid 524] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 524] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 524] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 524] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 524] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[526], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 526
[pid 524] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 524] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 525] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 526 attached
) = 0
[pid 525] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 525] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 526] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 526] umount2("./file0", MNT_DETACH) = 0
[pid 526] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 524] <... futex resumed>) = 0
[pid 524] exit_group(0) = ?
[pid 525] <... futex resumed>) = ?
[pid 525] +++ exited with 0 +++
[pid 526] <... futex resumed>) = ?
[pid 526] +++ exited with 0 +++
[pid 524] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=524, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 527
./strace-static-x86_64: Process 527 attached
[pid 527] set_robust_list(0x5555560865e0, 24) = 0
[pid 527] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 527] setpgid(0, 0) = 0
[pid 527] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 527] write(3, "1000", 4) = 4
[pid 527] close(3) = 0
[pid 527] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 527] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 527] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 527] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 528 attached
, parent_tid=[528], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 528
[pid 527] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 527] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 528] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 528] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 528] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 527] <... futex resumed>) = 0
[pid 528] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 527] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 528] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 527] <... futex resumed>) = 0
[pid 527] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 528] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 528] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 527] <... futex resumed>) = 0
[pid 527] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 528] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 527] <... futex resumed>) = 0
[pid 527] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 528] <... mount resumed>) = 0
[pid 528] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 527] <... futex resumed>) = 0
[pid 527] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 527] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 527] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 528] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 527] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 527] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 528] <... umount2 resumed>) = 0
[pid 527] <... clone resumed>, parent_tid=[529], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 529
[pid 527] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 527] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 529 attached
<unfinished ...>
[pid 529] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 529] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 528] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 529] <... umount2 resumed>) = 0
[pid 529] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 527] <... futex resumed>) = 0
[pid 528] <... futex resumed>) = 0
[pid 528] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 527] exit_group(0) = ?
[pid 529] <... futex resumed>) = ?
[pid 529] +++ exited with 0 +++
[pid 528] <... futex resumed>) = ?
[pid 528] +++ exited with 0 +++
[pid 527] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=527, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 530 attached
, child_tidptr=0x5555560865d0) = 530
[pid 530] set_robust_list(0x5555560865e0, 24) = 0
[pid 530] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 530] setpgid(0, 0) = 0
[pid 530] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 530] write(3, "1000", 4) = 4
[pid 530] close(3) = 0
[pid 530] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 530] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 530] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 530] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[531], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 531
./strace-static-x86_64: Process 531 attached
[pid 530] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 531] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 530] <... futex resumed>) = 0
[pid 531] <... set_robust_list resumed>) = 0
[pid 531] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 531] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 531] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 530] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 530] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 531] <... futex resumed>) = 0
[pid 530] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 531] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 531] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 531] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 530] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 530] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 531] <... futex resumed>) = 0
[pid 530] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 531] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 531] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 530] <... futex resumed>) = 0
[pid 531] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 530] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 530] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 530] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 530] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 531] <... umount2 resumed>) = 0
[pid 530] <... mprotect resumed>) = 0
[pid 531] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 530] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 531] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 532 attached
<unfinished ...>
[pid 530] <... clone resumed>, parent_tid=[532], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 532
[pid 532] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 530] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 532] <... set_robust_list resumed>) = 0
[pid 530] <... futex resumed>) = 0
[pid 532] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 530] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 532] <... umount2 resumed>) = 0
[pid 532] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 530] <... futex resumed>) = 0
[pid 532] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 530] exit_group(0) = ?
[pid 531] <... futex resumed>) = ?
[pid 531] +++ exited with 0 +++
[pid 532] <... futex resumed>) = ?
[pid 532] +++ exited with 0 +++
[pid 530] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=530, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 533
./strace-static-x86_64: Process 533 attached
[pid 533] set_robust_list(0x5555560865e0, 24) = 0
[pid 533] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 533] setpgid(0, 0) = 0
[pid 533] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 533] write(3, "1000", 4) = 4
[pid 533] close(3) = 0
[pid 533] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 533] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 533] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 533] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 534 attached
, parent_tid=[534], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 534
[pid 533] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 534] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 533] <... futex resumed>) = 0
[pid 534] <... set_robust_list resumed>) = 0
[pid 533] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 534] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 534] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 533] <... futex resumed>) = 0
[pid 534] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 533] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 533] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 534] <... mount resumed>) = 0
[pid 534] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 533] <... futex resumed>) = 0
[pid 534] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 533] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 533] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 534] <... mount resumed>) = 0
[pid 534] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 533] <... futex resumed>) = 0
[pid 533] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 533] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 533] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 533] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 534] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 533] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 534] <... umount2 resumed>) = 0
[pid 533] <... clone resumed>, parent_tid=[535], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 535
[pid 533] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 533] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 535 attached
<unfinished ...>
[pid 535] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 535] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 534] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 535] <... umount2 resumed>) = 0
[pid 535] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 534] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 533] <... futex resumed>) = 0
[pid 533] exit_group(0) = ?
[pid 534] <... futex resumed>) = ?
[pid 535] <... futex resumed>) = ?
[pid 535] +++ exited with 0 +++
[pid 534] +++ exited with 0 +++
[pid 533] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=533, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
[ 20.503504][ T519] VFS: Busy inodes after unmount of ramfs. Self-destruct in 5 seconds. Have a nice day...
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 536
./strace-static-x86_64: Process 536 attached
[pid 536] set_robust_list(0x5555560865e0, 24) = 0
[pid 536] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 536] setpgid(0, 0) = 0
[pid 536] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 536] write(3, "1000", 4) = 4
[pid 536] close(3) = 0
[pid 536] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 536] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 536] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 536] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 537 attached
<unfinished ...>
[pid 537] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 536] <... clone resumed>, parent_tid=[537], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 537
[pid 537] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 536] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 537] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 536] <... futex resumed>) = 0
[pid 537] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 537] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 537] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 536] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 536] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 537] <... futex resumed>) = 0
[pid 536] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 537] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 537] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 537] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 536] <... futex resumed>) = 0
[pid 536] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 537] <... futex resumed>) = 0
[pid 537] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 536] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 537] <... mount resumed>) = 0
[pid 537] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 536] <... futex resumed>) = 0
[pid 537] <... futex resumed>) = 1
[pid 536] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 537] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 536] <... futex resumed>) = 0
[pid 536] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 536] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 536] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 536] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 537] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 538 attached
[pid 537] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 536] <... clone resumed>, parent_tid=[538], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 538
[pid 538] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 537] <... futex resumed>) = 0
[pid 538] <... set_robust_list resumed>) = 0
[pid 537] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 536] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 538] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 536] <... futex resumed>) = 0
[pid 536] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 538] <... umount2 resumed>) = 0
[pid 538] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 536] <... futex resumed>) = 0
[pid 536] exit_group(0 <unfinished ...>
[pid 538] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 537] <... futex resumed>) = ?
[pid 536] <... exit_group resumed>) = ?
[pid 538] +++ exited with 0 +++
[pid 537] +++ exited with 0 +++
[pid 536] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=536, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 539
./strace-static-x86_64: Process 539 attached
[pid 539] set_robust_list(0x5555560865e0, 24) = 0
[pid 539] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 539] setpgid(0, 0) = 0
[pid 539] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 539] write(3, "1000", 4) = 4
[pid 539] close(3) = 0
[pid 539] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 539] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 539] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 539] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 540 attached
, parent_tid=[540], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 540
[pid 540] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 540] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 539] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 540] <... futex resumed>) = 0
[pid 540] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 540] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 540] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 539] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 539] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 540] <... futex resumed>) = 0
[pid 540] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 540] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 540] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 539] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 539] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 540] <... futex resumed>) = 0
[pid 540] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 539] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 540] <... mount resumed>) = 0
[pid 540] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 540] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 539] <... futex resumed>) = 0
[pid 539] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 540] <... futex resumed>) = 0
[pid 540] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 539] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 539] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 540] <... umount2 resumed>) = 0
[pid 539] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 539] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 540] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 539] <... clone resumed>, parent_tid=[541], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 541
[pid 540] <... futex resumed>) = 0
[pid 540] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 541 attached
<unfinished ...>
[pid 541] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 541] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 539] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 541] <... futex resumed>) = 0
[pid 541] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 539] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 541] <... umount2 resumed>) = 0
[pid 541] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 539] <... futex resumed>) = 0
[pid 541] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 539] exit_group(0 <unfinished ...>
[pid 541] <... futex resumed>) = ?
[pid 540] <... futex resumed>) = ?
[pid 539] <... exit_group resumed>) = ?
[pid 540] +++ exited with 0 +++
[pid 541] +++ exited with 0 +++
[pid 539] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=539, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 542
./strace-static-x86_64: Process 542 attached
[pid 542] set_robust_list(0x5555560865e0, 24) = 0
[pid 542] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 542] setpgid(0, 0) = 0
[pid 542] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 542] write(3, "1000", 4) = 4
[pid 542] close(3) = 0
[pid 542] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 542] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 542] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 542] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 543 attached
, parent_tid=[543], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 543
[pid 542] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 542] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 543] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 543] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 543] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 542] <... futex resumed>) = 0
[pid 542] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 542] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 543] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 543] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 542] <... futex resumed>) = 0
[pid 542] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 542] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 543] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 543] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 542] <... futex resumed>) = 0
[pid 542] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 542] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 542] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 542] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 542] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 543] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 542] <... clone resumed>, parent_tid=[544], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 544
[pid 542] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 542] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 544 attached
<unfinished ...>
[pid 544] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 544] umount2("./file0", MNT_DETACH) = 0
[pid 544] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 542] <... futex resumed>) = 0
[pid 544] <... futex resumed>) = 1
[pid 544] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 543] <... umount2 resumed>) = 0
[pid 543] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 543] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 542] exit_group(0) = ?
[pid 544] <... futex resumed>) = ?
[pid 544] +++ exited with 0 +++
[pid 543] <... futex resumed>) = ?
[pid 543] +++ exited with 0 +++
[pid 542] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=542, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 545
./strace-static-x86_64: Process 545 attached
[pid 545] set_robust_list(0x5555560865e0, 24) = 0
[pid 545] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 545] setpgid(0, 0) = 0
[pid 545] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 545] write(3, "1000", 4) = 4
[pid 545] close(3) = 0
[pid 545] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 545] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 545] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 545] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 546 attached
, parent_tid=[546], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 546
[pid 546] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 546] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 545] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 546] <... futex resumed>) = 0
[pid 546] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 546] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 546] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 545] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 545] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 546] <... futex resumed>) = 0
[pid 546] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 545] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 546] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 546] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 545] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 545] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 546] <... futex resumed>) = 0
[pid 545] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 546] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 546] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 545] <... futex resumed>) = 0
[pid 546] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 545] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 546] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 546] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 545] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 545] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 545] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 545] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 546] <... umount2 resumed>) = 0
[pid 545] <... clone resumed>, parent_tid=[547], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 547
[pid 545] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 545] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 547 attached
<unfinished ...>
[pid 546] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 547] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 546] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 547] <... set_robust_list resumed>) = 0
[pid 547] umount2("./file0", MNT_DETACH) = 0
[pid 547] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 547] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 545] <... futex resumed>) = 0
[pid 545] exit_group(0) = ?
[pid 547] <... futex resumed>) = 231
[pid 546] <... futex resumed>) = ?
[pid 546] +++ exited with 0 +++
[pid 547] +++ exited with 0 +++
[pid 545] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=545, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 548
./strace-static-x86_64: Process 548 attached
[pid 548] set_robust_list(0x5555560865e0, 24) = 0
[pid 548] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 548] setpgid(0, 0) = 0
[pid 548] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 548] write(3, "1000", 4) = 4
[pid 548] close(3) = 0
[pid 548] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 548] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 548] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 548] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 549 attached
, parent_tid=[549], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 549
[pid 548] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 548] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 549] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 549] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 549] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 548] <... futex resumed>) = 0
[pid 548] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 549] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 548] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 549] <... mount resumed>) = 0
[pid 549] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 548] <... futex resumed>) = 0
[pid 549] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 548] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 549] <... futex resumed>) = 0
[pid 548] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 549] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 549] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 548] <... futex resumed>) = 0
[pid 548] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 548] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 549] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 548] <... futex resumed>) = 0
[pid 548] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 548] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 548] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 549] <... umount2 resumed>) = 0
[pid 549] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 550 attached
<unfinished ...>
[pid 550] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 550] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 549] <... futex resumed>) = 0
[pid 548] <... clone resumed>, parent_tid=[550], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 550
[pid 549] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 548] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 550] <... futex resumed>) = 0
[pid 550] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 548] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 550] <... umount2 resumed>) = 0
[pid 550] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 550] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 548] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 548] exit_group(0) = ?
[pid 549] <... futex resumed>) = ?
[pid 550] <... futex resumed>) = ?
[pid 550] +++ exited with 0 +++
[pid 549] +++ exited with 0 +++
[pid 548] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=548, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 551
./strace-static-x86_64: Process 551 attached
[pid 551] set_robust_list(0x5555560865e0, 24) = 0
[pid 551] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 551] setpgid(0, 0) = 0
[pid 551] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 551] write(3, "1000", 4) = 4
[pid 551] close(3) = 0
[pid 551] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 551] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 551] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 551] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[552], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 552
[pid 551] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 551] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 552 attached
<unfinished ...>
[pid 552] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 552] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 552] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 551] <... futex resumed>) = 0
[pid 551] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 551] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 552] <... futex resumed>) = 1
[pid 552] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 552] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 551] <... futex resumed>) = 0
[pid 551] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 551] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 552] <... futex resumed>) = 1
[pid 552] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 552] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 551] <... futex resumed>) = 0
[pid 551] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 551] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 551] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 551] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 551] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[553], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 553
[pid 551] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 551] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 552] <... futex resumed>) = 1
[pid 552] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 553 attached
) = 0
[pid 553] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 552] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 553] <... set_robust_list resumed>) = 0
[pid 552] <... futex resumed>) = 0
[pid 553] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 552] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 553] <... umount2 resumed>) = 0
[pid 553] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 551] <... futex resumed>) = 0
[pid 553] <... futex resumed>) = 1
[pid 551] exit_group(0) = ?
[pid 552] <... futex resumed>) = ?
[pid 552] +++ exited with 0 +++
[pid 553] +++ exited with 0 +++
[pid 551] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=551, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 554
./strace-static-x86_64: Process 554 attached
[pid 554] set_robust_list(0x5555560865e0, 24) = 0
[pid 554] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 554] setpgid(0, 0) = 0
[pid 554] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 554] write(3, "1000", 4) = 4
[pid 554] close(3) = 0
[pid 554] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 554] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 554] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 554] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 555 attached
, parent_tid=[555], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 555
[pid 555] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 554] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 554] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 555] <... set_robust_list resumed>) = 0
[pid 555] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 555] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 554] <... futex resumed>) = 0
[pid 555] <... futex resumed>) = 1
[pid 554] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 554] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 555] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 555] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 554] <... futex resumed>) = 0
[pid 554] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 554] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 555] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 555] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 554] <... futex resumed>) = 0
[pid 554] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 554] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 554] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 554] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 554] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 556 attached
, parent_tid=[556], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 556
[pid 556] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 554] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 556] <... set_robust_list resumed>) = 0
[pid 556] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 554] <... futex resumed>) = 0
[pid 554] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 555] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 556] <... umount2 resumed>) = 0
[pid 556] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 554] <... futex resumed>) = 0
[pid 556] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 555] <... umount2 resumed>) = 0
[pid 555] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 555] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 554] exit_group(0) = ?
[pid 556] <... futex resumed>) = ?
[pid 556] +++ exited with 0 +++
[pid 555] <... futex resumed>) = ?
[pid 555] +++ exited with 0 +++
[pid 554] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=554, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 557
./strace-static-x86_64: Process 557 attached
[pid 557] set_robust_list(0x5555560865e0, 24) = 0
[pid 557] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 557] setpgid(0, 0) = 0
[pid 557] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 557] write(3, "1000", 4) = 4
[pid 557] close(3) = 0
[pid 557] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 557] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 557] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 557] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[558], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 558
[pid 557] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 557] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 558 attached
<unfinished ...>
[pid 558] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 558] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 558] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 557] <... futex resumed>) = 0
[pid 557] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 557] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 558] <... futex resumed>) = 1
[pid 558] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 558] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 557] <... futex resumed>) = 0
[pid 557] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 557] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 558] <... futex resumed>) = 1
[pid 558] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 558] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 557] <... futex resumed>) = 0
[pid 557] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 557] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 557] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 557] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 557] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 558] <... futex resumed>) = 1
./strace-static-x86_64: Process 559 attached
[pid 557] <... clone resumed>, parent_tid=[559], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 559
[pid 559] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 558] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 557] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 559] <... set_robust_list resumed>) = 0
[pid 558] <... umount2 resumed>) = 0
[pid 557] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 559] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 558] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 558] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 559] <... umount2 resumed>) = 0
[pid 559] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 557] <... futex resumed>) = 0
[pid 557] exit_group(0 <unfinished ...>
[pid 558] <... futex resumed>) = 231
[pid 557] <... exit_group resumed>) = ?
[pid 559] +++ exited with 0 +++
[pid 558] +++ exited with 0 +++
[pid 557] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=557, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 560
./strace-static-x86_64: Process 560 attached
[pid 560] set_robust_list(0x5555560865e0, 24) = 0
[pid 560] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 560] setpgid(0, 0) = 0
[pid 560] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 560] write(3, "1000", 4) = 4
[pid 560] close(3) = 0
[pid 560] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 560] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 560] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 560] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 561 attached
, parent_tid=[561], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 561
[pid 561] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 560] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 561] <... set_robust_list resumed>) = 0
[pid 560] <... futex resumed>) = 0
[pid 560] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 561] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 561] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 560] <... futex resumed>) = 0
[pid 561] <... futex resumed>) = 1
[pid 560] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 561] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 560] <... futex resumed>) = 0
[pid 560] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 561] <... mount resumed>) = 0
[pid 561] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 560] <... futex resumed>) = 0
[pid 560] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 561] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 560] <... futex resumed>) = 0
[pid 560] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 561] <... mount resumed>) = 0
[pid 561] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 560] <... futex resumed>) = 0
[pid 560] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 561] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 560] <... futex resumed>) = 0
[pid 560] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 560] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 561] <... umount2 resumed>) = 0
[pid 560] <... mmap resumed>) = 0x7f236e446000
[pid 560] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 560] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 561] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 562 attached
<unfinished ...>
[pid 560] <... clone resumed>, parent_tid=[562], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 562
[pid 560] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 560] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 561] <... futex resumed>) = 0
[pid 562] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 561] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 562] <... set_robust_list resumed>) = 0
[pid 562] umount2("./file0", MNT_DETACH) = 0
[pid 562] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 560] <... futex resumed>) = 0
[pid 560] exit_group(0) = ?
[pid 561] <... futex resumed>) = ? <unavailable>
[pid 561] +++ exited with 0 +++
[pid 562] +++ exited with 0 +++
[pid 560] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=560, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 563
./strace-static-x86_64: Process 563 attached
[pid 563] set_robust_list(0x5555560865e0, 24) = 0
[pid 563] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 563] setpgid(0, 0) = 0
[pid 563] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 563] write(3, "1000", 4) = 4
[pid 563] close(3) = 0
[pid 563] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 563] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 563] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 563] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 564 attached
<unfinished ...>
[pid 564] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 564] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 563] <... clone resumed>, parent_tid=[564], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 564
[pid 563] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 564] <... futex resumed>) = 0
[pid 564] mkdir("./file0", 000 <unfinished ...>
[pid 563] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 564] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 564] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 563] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 564] <... futex resumed>) = 0
[pid 563] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 564] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 563] <... futex resumed>) = 0
[pid 564] <... mount resumed>) = 0
[pid 564] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 564] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 563] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 563] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 564] <... futex resumed>) = 0
[pid 563] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 564] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 564] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 564] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 563] <... futex resumed>) = 0
[pid 563] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 564] <... futex resumed>) = 0
[pid 563] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 564] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 563] <... futex resumed>) = 0
[pid 563] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 564] <... umount2 resumed>) = 0
[pid 564] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 563] <... mmap resumed>) = 0x7f236e446000
[pid 564] <... futex resumed>) = 0
[pid 564] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 563] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 563] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 565 attached
, parent_tid=[565], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 565
[pid 565] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 565] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 563] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 565] <... futex resumed>) = 0
[pid 563] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 565] umount2("./file0", MNT_DETACH) = 0
[pid 565] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 563] <... futex resumed>) = 0
[pid 565] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 563] exit_group(0 <unfinished ...>
[pid 564] <... futex resumed>) = ?
[pid 563] <... exit_group resumed>) = ?
[pid 564] +++ exited with 0 +++
[pid 565] <... futex resumed>) = ?
[pid 565] +++ exited with 0 +++
[pid 563] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=563, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 566
./strace-static-x86_64: Process 566 attached
[pid 566] set_robust_list(0x5555560865e0, 24) = 0
[pid 566] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 566] setpgid(0, 0) = 0
[pid 566] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 566] write(3, "1000", 4) = 4
[pid 566] close(3) = 0
[pid 566] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 566] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 566] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 566] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[567], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 567
[pid 566] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 566] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 567 attached
<unfinished ...>
[pid 567] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 567] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 567] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 566] <... futex resumed>) = 0
[pid 566] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 566] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 567] <... futex resumed>) = 1
[pid 567] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 567] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 566] <... futex resumed>) = 0
[pid 567] <... futex resumed>) = 1
[pid 566] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 567] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 566] <... futex resumed>) = 0
[pid 566] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 567] <... mount resumed>) = 0
[pid 567] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 566] <... futex resumed>) = 0
[pid 567] <... futex resumed>) = 1
[pid 566] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 567] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 566] <... futex resumed>) = 0
[pid 566] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 566] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 566] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 566] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 567] <... umount2 resumed>) = 0
[pid 567] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 568 attached
) = 0
[pid 566] <... clone resumed>, parent_tid=[568], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 568
[pid 568] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 567] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 566] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 568] <... set_robust_list resumed>) = 0
[pid 566] <... futex resumed>) = 0
[pid 568] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 566] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 568] <... umount2 resumed>) = 0
[pid 568] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 566] <... futex resumed>) = 0
[pid 568] <... futex resumed>) = 1
[pid 566] exit_group(0 <unfinished ...>
[pid 568] ????( <unfinished ...>
[pid 566] <... exit_group resumed>) = ?
[pid 567] <... futex resumed>) = ?
[pid 567] +++ exited with 0 +++
[pid 568] <... ???? resumed>) = ?
[pid 568] +++ exited with 0 +++
[pid 566] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=566, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 569
./strace-static-x86_64: Process 569 attached
[pid 569] set_robust_list(0x5555560865e0, 24) = 0
[pid 569] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 569] setpgid(0, 0) = 0
[pid 569] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 569] write(3, "1000", 4) = 4
[pid 569] close(3) = 0
[pid 569] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 569] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 569] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 569] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 570 attached
, parent_tid=[570], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 570
[pid 570] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 569] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 569] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 570] <... set_robust_list resumed>) = 0
[pid 570] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 570] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 569] <... futex resumed>) = 0
[pid 569] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 569] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 570] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 570] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 569] <... futex resumed>) = 0
[pid 569] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 570] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 569] <... futex resumed>) = 0
[pid 569] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 570] <... mount resumed>) = 0
[pid 570] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 569] <... futex resumed>) = 0
[pid 569] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 570] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 569] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 569] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 570] <... umount2 resumed>) = 0
[pid 569] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 570] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 569] <... mprotect resumed>) = 0
[pid 569] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 570] <... futex resumed>) = 0
[pid 570] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 571 attached
<unfinished ...>
[pid 571] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 571] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 569] <... clone resumed>, parent_tid=[571], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 571
[pid 569] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 571] <... futex resumed>) = 0
[pid 569] <... futex resumed>) = 1
[pid 571] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 569] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 571] <... umount2 resumed>) = 0
[pid 571] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 569] <... futex resumed>) = 0
[pid 571] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 569] exit_group(0) = ?
[pid 570] <... futex resumed>) = ?
[pid 571] <... futex resumed>) = ?
[pid 571] +++ exited with 0 +++
[pid 570] +++ exited with 0 +++
[pid 569] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=569, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 572
./strace-static-x86_64: Process 572 attached
[pid 572] set_robust_list(0x5555560865e0, 24) = 0
[pid 572] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 572] setpgid(0, 0) = 0
[pid 572] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 572] write(3, "1000", 4) = 4
[pid 572] close(3) = 0
[pid 572] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 572] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 572] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 572] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 573 attached
, parent_tid=[573], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 573
[pid 573] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 572] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 573] <... set_robust_list resumed>) = 0
[pid 572] <... futex resumed>) = 0
[pid 572] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 573] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 573] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 572] <... futex resumed>) = 0
[pid 573] <... futex resumed>) = 1
[pid 572] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 573] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 572] <... futex resumed>) = 0
[pid 572] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 573] <... mount resumed>) = 0
[pid 573] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 572] <... futex resumed>) = 0
[pid 573] <... futex resumed>) = 1
[pid 572] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 573] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 572] <... futex resumed>) = 0
[pid 572] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 573] <... mount resumed>) = 0
[pid 573] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 572] <... futex resumed>) = 0
[pid 572] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 572] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 572] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 572] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 572] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[574], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 574
[pid 573] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 572] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 572] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 574 attached
<unfinished ...>
[pid 574] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 574] umount2("./file0", MNT_DETACH) = 0
[pid 574] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 572] <... futex resumed>) = 0
[pid 573] <... umount2 resumed>) = 0
[pid 574] <... futex resumed>) = 1
[pid 573] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 574] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 573] <... futex resumed>) = 0
[pid 573] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 572] exit_group(0) = ?
[pid 574] <... futex resumed>) = ?
[pid 573] <... futex resumed>) = ?
[pid 574] +++ exited with 0 +++
[pid 573] +++ exited with 0 +++
[pid 572] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=572, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 575
./strace-static-x86_64: Process 575 attached
[pid 575] set_robust_list(0x5555560865e0, 24) = 0
[pid 575] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 575] setpgid(0, 0) = 0
[pid 575] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 575] write(3, "1000", 4) = 4
[pid 575] close(3) = 0
[pid 575] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 575] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 575] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 575] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 576 attached
, parent_tid=[576], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 576
[pid 576] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 576] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 575] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 576] <... futex resumed>) = 0
[pid 575] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 576] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 576] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 576] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 575] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 575] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 576] <... futex resumed>) = 0
[pid 575] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 576] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 576] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 575] <... futex resumed>) = 0
[pid 575] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 575] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 576] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 576] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 575] <... futex resumed>) = 0
[pid 575] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 575] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 575] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 575] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 576] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 575] <... mprotect resumed>) = 0
[pid 575] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 576] <... umount2 resumed>) = 0
[pid 575] <... clone resumed>, parent_tid=[577], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 577
[pid 575] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 575] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 577 attached
<unfinished ...>
[pid 577] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 577] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 576] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 577] <... umount2 resumed>) = 0
[pid 577] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 575] <... futex resumed>) = 0
[pid 576] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 575] exit_group(0 <unfinished ...>
[pid 576] <... futex resumed>) = ?
[pid 575] <... exit_group resumed>) = ?
[pid 576] +++ exited with 0 +++
[pid 577] <... futex resumed>) = ?
[pid 577] +++ exited with 0 +++
[pid 575] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=575, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 578
./strace-static-x86_64: Process 578 attached
[pid 578] set_robust_list(0x5555560865e0, 24) = 0
[pid 578] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 578] setpgid(0, 0) = 0
[pid 578] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 578] write(3, "1000", 4) = 4
[pid 578] close(3) = 0
[pid 578] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 578] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 578] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 578] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[579], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 579
[pid 578] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 578] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 579 attached
<unfinished ...>
[pid 579] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 579] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 579] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 578] <... futex resumed>) = 0
[pid 578] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 578] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 579] <... futex resumed>) = 1
[pid 579] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 579] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 578] <... futex resumed>) = 0
[pid 579] <... futex resumed>) = 1
[pid 578] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 579] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 578] <... futex resumed>) = 0
[pid 578] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 579] <... mount resumed>) = 0
[pid 579] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 578] <... futex resumed>) = 0
[pid 579] <... futex resumed>) = 1
[pid 578] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 579] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 578] <... futex resumed>) = 0
[pid 578] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 578] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 578] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 579] <... umount2 resumed>) = 0
[pid 578] <... mprotect resumed>) = 0
[pid 579] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 578] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 579] <... futex resumed>) = 0
./strace-static-x86_64: Process 580 attached
[pid 579] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 578] <... clone resumed>, parent_tid=[580], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 580
[pid 580] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 578] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 580] <... set_robust_list resumed>) = 0
[pid 578] <... futex resumed>) = 0
[pid 580] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 578] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 580] <... umount2 resumed>) = 0
[pid 580] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 578] <... futex resumed>) = 0
[pid 578] exit_group(0 <unfinished ...>
[pid 580] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 578] <... exit_group resumed>) = ?
[pid 579] <... futex resumed>) = ?
[pid 580] <... futex resumed>) = ?
[pid 579] +++ exited with 0 +++
[pid 580] +++ exited with 0 +++
[pid 578] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=578, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 581 attached
, child_tidptr=0x5555560865d0) = 581
[pid 581] set_robust_list(0x5555560865e0, 24) = 0
[pid 581] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 581] setpgid(0, 0) = 0
[pid 581] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 581] write(3, "1000", 4) = 4
[pid 581] close(3) = 0
[pid 581] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 581] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 581] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 581] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[582], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 582
[pid 581] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 581] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 582 attached
<unfinished ...>
[pid 582] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 582] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 582] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 581] <... futex resumed>) = 0
[pid 581] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 581] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 582] <... futex resumed>) = 1
[pid 582] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 582] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 581] <... futex resumed>) = 0
[pid 581] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 581] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 582] <... futex resumed>) = 1
[pid 582] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 582] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 581] <... futex resumed>) = 0
[pid 582] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 581] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 582] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 581] <... futex resumed>) = 0
[pid 582] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 581] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 581] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 581] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 582] <... umount2 resumed>) = 0
[pid 581] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 582] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 583 attached
[pid 582] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 581] <... clone resumed>, parent_tid=[583], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 583
[pid 583] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 581] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 583] <... set_robust_list resumed>) = 0
[pid 581] <... futex resumed>) = 0
[pid 583] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 581] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 583] <... umount2 resumed>) = 0
[pid 583] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 581] <... futex resumed>) = 0
[pid 583] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 581] exit_group(0) = ?
[pid 582] <... futex resumed>) = ?
[pid 582] +++ exited with 0 +++
[pid 583] <... futex resumed>) = ?
[pid 583] +++ exited with 0 +++
[pid 581] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=581, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 584
./strace-static-x86_64: Process 584 attached
[pid 584] set_robust_list(0x5555560865e0, 24) = 0
[pid 584] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 584] setpgid(0, 0) = 0
[pid 584] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 584] write(3, "1000", 4) = 4
[pid 584] close(3) = 0
[pid 584] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 584] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 584] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 584] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[585], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 585
[pid 584] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 584] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 585 attached
<unfinished ...>
[pid 585] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 585] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 585] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 584] <... futex resumed>) = 0
[pid 584] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 584] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 585] <... futex resumed>) = 1
[pid 585] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 585] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 584] <... futex resumed>) = 0
[pid 584] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 584] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 585] <... futex resumed>) = 1
[pid 585] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 585] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 584] <... futex resumed>) = 0
[pid 584] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 584] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 584] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 584] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 584] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[586], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 586
[pid 584] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 584] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 585] <... futex resumed>) = 1
[pid 585] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 586 attached
) = 0
[pid 585] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 585] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 586] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 586] umount2("./file0", MNT_DETACH) = 0
[pid 586] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 584] <... futex resumed>) = 0
[pid 584] exit_group(0) = ?
[pid 585] <... futex resumed>) = ?
[pid 585] +++ exited with 0 +++
[pid 586] +++ exited with 0 +++
[pid 584] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=584, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 587
./strace-static-x86_64: Process 587 attached
[pid 587] set_robust_list(0x5555560865e0, 24) = 0
[pid 587] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 587] setpgid(0, 0) = 0
[pid 587] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 587] write(3, "1000", 4) = 4
[pid 587] close(3) = 0
[pid 587] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 587] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 587] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 587] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[588], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 588
[pid 587] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 587] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 588 attached
<unfinished ...>
[pid 588] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 588] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 588] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 587] <... futex resumed>) = 0
[pid 588] <... futex resumed>) = 1
[pid 587] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 588] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 587] <... futex resumed>) = 0
[pid 587] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 588] <... mount resumed>) = 0
[pid 588] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 587] <... futex resumed>) = 0
[pid 588] <... futex resumed>) = 1
[pid 587] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 588] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 587] <... futex resumed>) = 0
[pid 587] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 588] <... mount resumed>) = 0
[pid 588] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 587] <... futex resumed>) = 0
[pid 587] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 587] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 587] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 588] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 587] <... mmap resumed>) = 0x7f236e446000
[pid 587] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 587] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[589], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 589
[pid 587] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 587] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 589 attached
<unfinished ...>
[pid 589] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 589] umount2("./file0", MNT_DETACH) = 0
[pid 589] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 587] <... futex resumed>) = 0
[pid 589] <... futex resumed>) = 1
[pid 589] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 588] <... umount2 resumed>) = 0
[pid 588] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 588] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 587] exit_group(0) = ?
[pid 589] <... futex resumed>) = ?
[pid 589] +++ exited with 0 +++
[pid 588] <... futex resumed>) = ?
[pid 588] +++ exited with 0 +++
[pid 587] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=587, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 590
./strace-static-x86_64: Process 590 attached
[pid 590] set_robust_list(0x5555560865e0, 24) = 0
[pid 590] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 590] setpgid(0, 0) = 0
[pid 590] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 590] write(3, "1000", 4) = 4
[pid 590] close(3) = 0
[pid 590] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 590] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 590] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 590] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 591 attached
, parent_tid=[591], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 591
[pid 590] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 591] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 590] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 591] <... set_robust_list resumed>) = 0
[pid 591] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 591] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 590] <... futex resumed>) = 0
[pid 591] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 590] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 591] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 590] <... futex resumed>) = 0
[pid 590] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 591] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 591] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 590] <... futex resumed>) = 0
[pid 590] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 590] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 591] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 591] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 590] <... futex resumed>) = 0
[pid 591] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 590] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 590] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 590] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 591] <... umount2 resumed>) = 0
[pid 590] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 590] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[592], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 592
[pid 590] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 590] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 592 attached
<unfinished ...>
[pid 592] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 592] umount2("./file0", MNT_DETACH) = 0
[pid 591] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 592] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 591] <... futex resumed>) = 0
[pid 591] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 590] <... futex resumed>) = 0
[pid 590] exit_group(0) = ?
[pid 592] <... futex resumed>) = ?
[pid 592] +++ exited with 0 +++
[pid 591] <... futex resumed>) = ?
[pid 591] +++ exited with 0 +++
[pid 590] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=590, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 593
./strace-static-x86_64: Process 593 attached
[pid 593] set_robust_list(0x5555560865e0, 24) = 0
[pid 593] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 593] setpgid(0, 0) = 0
[pid 593] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 593] write(3, "1000", 4) = 4
[pid 593] close(3) = 0
[pid 593] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 593] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 593] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 593] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 594 attached
, parent_tid=[594], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 594
[pid 594] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 593] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 594] <... set_robust_list resumed>) = 0
[pid 593] <... futex resumed>) = 0
[pid 594] mkdir("./file0", 000 <unfinished ...>
[pid 593] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 594] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 594] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 593] <... futex resumed>) = 0
[pid 594] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 593] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 593] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 594] <... mount resumed>) = 0
[pid 594] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 594] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 593] <... futex resumed>) = 0
[pid 593] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 593] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 594] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 594] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 594] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 593] <... futex resumed>) = 0
[pid 594] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 593] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 593] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 593] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 594] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 594] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 593] <... mmap resumed>) = 0x7f236e446000
[pid 593] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 594] <... umount2 resumed>) = 0
[pid 593] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 594] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 593] <... clone resumed>, parent_tid=[595], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 595
[pid 593] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 593] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 595 attached
<unfinished ...>
[pid 595] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 594] <... futex resumed>) = 0
[pid 595] <... set_robust_list resumed>) = 0
[pid 595] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 594] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 595] <... umount2 resumed>) = 0
[pid 595] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 593] <... futex resumed>) = 0
[pid 593] exit_group(0) = ?
[pid 594] <... futex resumed>) = ?
[pid 594] +++ exited with 0 +++
[pid 595] <... futex resumed>) = ?
[pid 595] +++ exited with 0 +++
[pid 593] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=593, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 596
./strace-static-x86_64: Process 596 attached
[pid 596] set_robust_list(0x5555560865e0, 24) = 0
[pid 596] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 596] setpgid(0, 0) = 0
[pid 596] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 596] write(3, "1000", 4) = 4
[pid 596] close(3) = 0
[pid 596] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 596] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 596] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 596] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[597], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 597
./strace-static-x86_64: Process 597 attached
[pid 597] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 597] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 596] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 597] <... futex resumed>) = 0
[pid 597] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 596] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 597] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 597] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 596] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 596] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 597] <... futex resumed>) = 0
[pid 596] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 597] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 597] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 596] <... futex resumed>) = 0
[pid 596] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 596] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 597] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 597] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 596] <... futex resumed>) = 0
[pid 596] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 596] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 596] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 596] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 596] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 598 attached
, parent_tid=[598], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 598
[pid 596] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 596] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 597] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 598] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 597] <... umount2 resumed>) = 0
[pid 597] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 597] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 598] umount2("./file0", MNT_DETACH) = 0
[pid 598] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 596] <... futex resumed>) = 0
[pid 598] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 596] exit_group(0) = ?
[pid 598] <... futex resumed>) = ?
[pid 597] <... futex resumed>) = ?
[pid 597] +++ exited with 0 +++
[pid 598] +++ exited with 0 +++
[pid 596] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=596, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 599
./strace-static-x86_64: Process 599 attached
[pid 599] set_robust_list(0x5555560865e0, 24) = 0
[pid 599] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 599] setpgid(0, 0) = 0
[pid 599] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 599] write(3, "1000", 4) = 4
[pid 599] close(3) = 0
[pid 599] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 599] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 599] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 599] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[600], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 600
[pid 599] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 599] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 600 attached
<unfinished ...>
[pid 600] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 600] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 600] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 599] <... futex resumed>) = 0
[pid 599] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 599] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 600] <... futex resumed>) = 1
[pid 600] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 600] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 599] <... futex resumed>) = 0
[pid 599] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 599] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 600] <... futex resumed>) = 1
[pid 600] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 600] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 599] <... futex resumed>) = 0
[pid 599] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 599] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 599] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 599] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 599] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[601], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 601
[pid 599] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 599] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 600] <... futex resumed>) = 1
[pid 600] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 601 attached
) = 0
[pid 600] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 600] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 601] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 601] umount2("./file0", MNT_DETACH) = 0
[pid 601] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 599] <... futex resumed>) = 0
[pid 599] exit_group(0) = ?
[pid 600] <... futex resumed>) = ?
[pid 600] +++ exited with 0 +++
[pid 601] +++ exited with 0 +++
[pid 599] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=599, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 602
./strace-static-x86_64: Process 602 attached
[pid 602] set_robust_list(0x5555560865e0, 24) = 0
[pid 602] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 602] setpgid(0, 0) = 0
[pid 602] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 602] write(3, "1000", 4) = 4
[pid 602] close(3) = 0
[pid 602] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 602] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 602] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 602] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 603 attached
, parent_tid=[603], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 603
[pid 603] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 603] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 602] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 603] <... futex resumed>) = 0
[pid 603] mkdir("./file0", 000 <unfinished ...>
[pid 602] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 603] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 603] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 603] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 602] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 602] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 603] <... futex resumed>) = 0
[pid 603] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 602] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 603] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 603] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 602] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 602] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 602] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 603] <... futex resumed>) = 0
[pid 603] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 603] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 602] <... futex resumed>) = 0
[pid 602] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 602] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 602] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 602] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 603] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 602] <... mprotect resumed>) = 0
[pid 602] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 603] <... umount2 resumed>) = 0
[pid 602] <... clone resumed>, parent_tid=[604], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 604
[pid 602] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 602] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 604 attached
<unfinished ...>
[pid 604] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 604] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 603] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 604] <... umount2 resumed>) = 0
[pid 603] <... futex resumed>) = 0
[pid 604] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 603] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 602] <... futex resumed>) = 0
[pid 602] exit_group(0) = ?
[pid 604] <... futex resumed>) = ?
[pid 603] <... futex resumed>) = ?
[pid 604] +++ exited with 0 +++
[pid 603] +++ exited with 0 +++
[pid 602] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=602, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 605
./strace-static-x86_64: Process 605 attached
[pid 605] set_robust_list(0x5555560865e0, 24) = 0
[pid 605] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 605] setpgid(0, 0) = 0
[pid 605] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 605] write(3, "1000", 4) = 4
[pid 605] close(3) = 0
[pid 605] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 605] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 605] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 605] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[606], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 606
[pid 605] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 605] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 606 attached
<unfinished ...>
[pid 606] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 606] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 606] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 605] <... futex resumed>) = 0
[pid 605] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 605] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 606] <... futex resumed>) = 1
[pid 606] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 606] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 605] <... futex resumed>) = 0
[pid 605] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 605] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 606] <... futex resumed>) = 1
[pid 606] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 606] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 605] <... futex resumed>) = 0
[pid 605] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 605] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 605] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 605] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 605] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 607 attached
, parent_tid=[607], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 607
[pid 605] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 607] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 605] <... futex resumed>) = 0
[pid 605] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 606] <... futex resumed>) = 1
[pid 606] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 607] <... set_robust_list resumed>) = 0
[pid 607] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 606] <... umount2 resumed>) = 0
[pid 606] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 606] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 607] <... umount2 resumed>) = 0
[pid 607] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 605] <... futex resumed>) = 0
[pid 607] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 605] exit_group(0) = ?
[pid 607] <... futex resumed>) = ?
[pid 606] <... futex resumed>) = ?
[pid 606] +++ exited with 0 +++
[pid 607] +++ exited with 0 +++
[pid 605] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=605, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 608
./strace-static-x86_64: Process 608 attached
[pid 608] set_robust_list(0x5555560865e0, 24) = 0
[pid 608] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 608] setpgid(0, 0) = 0
[pid 608] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 608] write(3, "1000", 4) = 4
[pid 608] close(3) = 0
[pid 608] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 608] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 608] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 608] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 609 attached
<unfinished ...>
[pid 609] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 609] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 608] <... clone resumed>, parent_tid=[609], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 609
[pid 608] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 609] <... futex resumed>) = 0
[pid 609] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 608] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 609] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 609] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 608] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 608] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 609] <... futex resumed>) = 0
[pid 609] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 608] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 609] <... mount resumed>) = 0
[pid 609] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 609] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 608] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 608] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 609] <... futex resumed>) = 0
[pid 609] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 608] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 609] <... mount resumed>) = 0
[pid 609] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 609] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 608] <... futex resumed>) = 0
[pid 608] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 609] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 609] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 608] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 608] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 608] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 608] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[610], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 610
[pid 609] <... umount2 resumed>) = 0
[pid 608] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 608] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 610 attached
<unfinished ...>
[pid 609] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 610] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 609] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 610] umount2("./file0", MNT_DETACH) = 0
[pid 610] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 608] <... futex resumed>) = 0
[pid 610] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 608] exit_group(0 <unfinished ...>
[pid 609] <... futex resumed>) = ?
[pid 609] +++ exited with 0 +++
[pid 608] <... exit_group resumed>) = ?
[pid 610] <... futex resumed>) = ?
[pid 610] +++ exited with 0 +++
[pid 608] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=608, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 611
./strace-static-x86_64: Process 611 attached
[pid 611] set_robust_list(0x5555560865e0, 24) = 0
[pid 611] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 611] setpgid(0, 0) = 0
[pid 611] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 611] write(3, "1000", 4) = 4
[pid 611] close(3) = 0
[pid 611] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 611] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 611] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 611] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 612 attached
<unfinished ...>
[pid 612] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 611] <... clone resumed>, parent_tid=[612], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 612
[pid 612] <... set_robust_list resumed>) = 0
[pid 611] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 612] mkdir("./file0", 000 <unfinished ...>
[pid 611] <... futex resumed>) = 0
[pid 612] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 611] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 612] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 611] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 611] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 611] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 612] <... futex resumed>) = 1
[pid 611] <... futex resumed>) = 0
[pid 611] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 612] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 612] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 611] <... futex resumed>) = 0
[pid 611] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 611] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 612] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 612] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 611] <... futex resumed>) = 0
[pid 612] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 611] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 611] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 611] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 612] <... umount2 resumed>) = 0
[pid 612] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 611] <... mmap resumed>) = 0x7f236e446000
[pid 612] <... futex resumed>) = 0
[pid 611] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 612] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 611] <... mprotect resumed>) = 0
[pid 611] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 613 attached
, parent_tid=[613], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 613
[pid 613] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 613] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 611] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 613] <... futex resumed>) = 0
[pid 613] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 611] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 613] <... umount2 resumed>) = 0
[pid 613] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 611] <... futex resumed>) = 0
[pid 611] exit_group(0) = ?
[pid 612] <... futex resumed>) = ?
[pid 612] +++ exited with 0 +++
[pid 613] +++ exited with 0 +++
[pid 611] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=611, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 614 attached
, child_tidptr=0x5555560865d0) = 614
[pid 614] set_robust_list(0x5555560865e0, 24) = 0
[pid 614] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 614] setpgid(0, 0) = 0
[pid 614] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 614] write(3, "1000", 4) = 4
[pid 614] close(3) = 0
[pid 614] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 614] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 614] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 614] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 615 attached
<unfinished ...>
[pid 615] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 614] <... clone resumed>, parent_tid=[615], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 615
[pid 615] <... set_robust_list resumed>) = 0
[pid 614] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 614] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 615] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 615] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 614] <... futex resumed>) = 0
[pid 614] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 615] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 614] <... futex resumed>) = 0
[pid 615] <... mount resumed>) = 0
[pid 614] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 615] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 615] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 614] <... futex resumed>) = 0
[pid 614] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 615] <... futex resumed>) = 0
[pid 615] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 614] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 615] <... mount resumed>) = 0
[pid 615] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 614] <... futex resumed>) = 0
[pid 614] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 614] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 614] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 614] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 614] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[616], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 616
[pid 614] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 614] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 616 attached
<unfinished ...>
[pid 616] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 616] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 615] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 616] <... umount2 resumed>) = 0
[pid 616] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 614] <... futex resumed>) = 0
[pid 616] <... futex resumed>) = 1
[pid 616] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 615] <... umount2 resumed>) = 0
[pid 615] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 615] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 614] exit_group(0) = ?
[pid 615] <... futex resumed>) = ?
[pid 615] +++ exited with 0 +++
[pid 616] <... futex resumed>) = ?
[pid 616] +++ exited with 0 +++
[pid 614] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=614, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 617
./strace-static-x86_64: Process 617 attached
[pid 617] set_robust_list(0x5555560865e0, 24) = 0
[pid 617] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 617] setpgid(0, 0) = 0
[pid 617] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 617] write(3, "1000", 4) = 4
[pid 617] close(3) = 0
[pid 617] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 617] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 617] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 617] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 618 attached
, parent_tid=[618], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 618
[pid 618] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 618] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 617] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 618] <... futex resumed>) = 0
[pid 618] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 618] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 618] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 617] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 617] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 618] <... futex resumed>) = 0
[pid 618] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 617] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 618] <... mount resumed>) = 0
[pid 618] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 618] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 617] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 617] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 618] <... futex resumed>) = 0
[pid 618] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 617] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 618] <... mount resumed>) = 0
[pid 618] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 618] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 617] <... futex resumed>) = 0
[pid 617] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 618] <... futex resumed>) = 0
[pid 617] <... futex resumed>) = 1
[pid 618] umount2("./file0", MNT_DETACH) = 0
[pid 618] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 618] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 617] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 618] <... futex resumed>) = 0
[pid 618] umount2("./file0", MNT_DETACH) = 0
[pid 617] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 618] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 618] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 617] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 617] exit_group(0) = ?
[pid 618] <... futex resumed>) = ?
[pid 618] +++ exited with 0 +++
[pid 617] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=617, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 619
./strace-static-x86_64: Process 619 attached
[pid 619] set_robust_list(0x5555560865e0, 24) = 0
[pid 619] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 619] setpgid(0, 0) = 0
[pid 619] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 619] write(3, "1000", 4) = 4
[pid 619] close(3) = 0
[pid 619] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 619] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 619] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 619] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 620 attached
, parent_tid=[620], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 620
[pid 620] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 619] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 620] <... set_robust_list resumed>) = 0
[pid 619] <... futex resumed>) = 0
[pid 620] mkdir("./file0", 000 <unfinished ...>
[pid 619] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 620] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 620] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 619] <... futex resumed>) = 0
[pid 620] <... futex resumed>) = 1
[pid 619] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 619] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 620] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 620] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 619] <... futex resumed>) = 0
[pid 619] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 619] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 620] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 620] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 619] <... futex resumed>) = 0
[pid 619] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 619] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 619] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 619] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 620] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 619] <... mprotect resumed>) = 0
[pid 619] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[621], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 621
[pid 619] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 619] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 620] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 621 attached
[pid 621] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 621] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 620] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 621] <... umount2 resumed>) = 0
[pid 620] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 621] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 619] <... futex resumed>) = 0
[pid 619] exit_group(0 <unfinished ...>
[pid 620] <... futex resumed>) = ?
[pid 619] <... exit_group resumed>) = ?
[pid 620] +++ exited with 0 +++
[pid 621] <... futex resumed>) = ?
[pid 621] +++ exited with 0 +++
[pid 619] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=619, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 622
./strace-static-x86_64: Process 622 attached
[pid 622] set_robust_list(0x5555560865e0, 24) = 0
[pid 622] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 622] setpgid(0, 0) = 0
[pid 622] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 622] write(3, "1000", 4) = 4
[pid 622] close(3) = 0
[pid 622] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 622] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 622] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 622] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 623 attached
, parent_tid=[623], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 623
[pid 623] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 623] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 622] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 623] <... futex resumed>) = 0
[pid 622] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 623] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 623] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 623] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 622] <... futex resumed>) = 0
[pid 622] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 623] <... futex resumed>) = 0
[pid 623] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 622] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 623] <... mount resumed>) = 0
[pid 623] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 622] <... futex resumed>) = 0
[pid 622] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 622] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 623] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 623] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 622] <... futex resumed>) = 0
[pid 623] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 622] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 622] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 622] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 623] <... umount2 resumed>) = 0
[pid 622] <... mmap resumed>) = 0x7f236e446000
[pid 622] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 623] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 623] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 622] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[624], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 624
[pid 622] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 622] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 624 attached
<unfinished ...>
[pid 624] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 624] umount2("./file0", MNT_DETACH) = 0
[pid 624] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 622] <... futex resumed>) = 0
[pid 622] exit_group(0) = ?
[pid 623] <... futex resumed>) = ?
[pid 624] <... futex resumed>) = ?
[pid 623] +++ exited with 0 +++
[pid 624] +++ exited with 0 +++
[pid 622] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=622, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 625 attached
, child_tidptr=0x5555560865d0) = 625
[pid 625] set_robust_list(0x5555560865e0, 24) = 0
[pid 625] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 625] setpgid(0, 0) = 0
[pid 625] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 625] write(3, "1000", 4) = 4
[pid 625] close(3) = 0
[pid 625] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 625] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 625] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 625] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[626], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 626
./strace-static-x86_64: Process 626 attached
[pid 626] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 626] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 625] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 626] <... futex resumed>) = 0
[pid 626] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 626] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 626] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 625] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 625] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 626] <... futex resumed>) = 0
[pid 626] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 625] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 626] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 626] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 625] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 625] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 626] <... futex resumed>) = 0
[pid 625] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 626] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 626] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 626] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 625] <... futex resumed>) = 0
[pid 625] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 626] <... futex resumed>) = 0
[pid 626] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 625] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 625] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 626] <... umount2 resumed>) = 0
[pid 626] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 625] <... mmap resumed>) = 0x7f236e446000
[pid 626] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 625] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 625] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 627 attached
, parent_tid=[627], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 627
[pid 627] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 627] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 625] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 627] <... futex resumed>) = 0
[pid 625] <... futex resumed>) = 1
[pid 627] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 625] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 627] <... umount2 resumed>) = 0
[pid 627] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 627] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 625] <... futex resumed>) = 0
[pid 625] exit_group(0 <unfinished ...>
[pid 626] <... futex resumed>) = ?
[pid 625] <... exit_group resumed>) = ?
[pid 626] +++ exited with 0 +++
[pid 627] <... futex resumed>) = ?
[pid 627] +++ exited with 0 +++
[pid 625] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=625, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 628
./strace-static-x86_64: Process 628 attached
[pid 628] set_robust_list(0x5555560865e0, 24) = 0
[pid 628] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 628] setpgid(0, 0) = 0
[pid 628] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 628] write(3, "1000", 4) = 4
[pid 628] close(3) = 0
[pid 628] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 628] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 628] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 628] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[629], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 629
[pid 628] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 628] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 629 attached
<unfinished ...>
[pid 629] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 629] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 629] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 628] <... futex resumed>) = 0
[pid 628] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 628] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 629] <... futex resumed>) = 1
[pid 629] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 629] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 628] <... futex resumed>) = 0
[pid 628] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 628] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 629] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 629] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 628] <... futex resumed>) = 0
[pid 628] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 628] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 628] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 628] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 628] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 629] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 628] <... clone resumed>, parent_tid=[630], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 630
[pid 628] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 628] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 630 attached
<unfinished ...>
[pid 630] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 630] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 629] <... umount2 resumed>) = 0
[pid 630] <... umount2 resumed>) = 0
[pid 630] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 628] <... futex resumed>) = 0
[pid 629] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 630] <... futex resumed>) = 1
[pid 629] <... futex resumed>) = 0
[pid 630] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 629] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 628] exit_group(0) = ?
[pid 629] <... futex resumed>) = ?
[pid 629] +++ exited with 0 +++
[pid 630] <... futex resumed>) = ?
[pid 630] +++ exited with 0 +++
[pid 628] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=628, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 631
./strace-static-x86_64: Process 631 attached
[pid 631] set_robust_list(0x5555560865e0, 24) = 0
[pid 631] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 631] setpgid(0, 0) = 0
[pid 631] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 631] write(3, "1000", 4) = 4
[pid 631] close(3) = 0
[pid 631] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 631] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 631] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 631] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 632 attached
<unfinished ...>
[pid 632] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 631] <... clone resumed>, parent_tid=[632], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 632
[pid 632] <... set_robust_list resumed>) = 0
[pid 631] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 632] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 632] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 632] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 631] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 631] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 632] <... futex resumed>) = 0
[pid 632] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 631] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 632] <... mount resumed>) = 0
[pid 632] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 632] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 631] <... futex resumed>) = 0
[pid 631] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 632] <... futex resumed>) = 0
[pid 632] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 631] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 632] <... mount resumed>) = 0
[pid 632] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 632] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 631] <... futex resumed>) = 0
[pid 631] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 632] <... futex resumed>) = 0
[pid 631] <... futex resumed>) = 1
[pid 632] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 631] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 631] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 631] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 631] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 632] <... umount2 resumed>) = 0
[pid 632] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 631] <... clone resumed>, parent_tid=[633], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 633
[pid 632] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 633 attached
<unfinished ...>
[pid 631] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 633] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 631] <... futex resumed>) = 0
[pid 633] <... set_robust_list resumed>) = 0
[pid 631] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 633] umount2("./file0", MNT_DETACH) = 0
[pid 633] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 631] <... futex resumed>) = 0
[pid 633] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 631] exit_group(0) = ?
[pid 632] <... futex resumed>) = ?
[pid 632] +++ exited with 0 +++
[pid 633] <... futex resumed>) = ?
[pid 633] +++ exited with 0 +++
[pid 631] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=631, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 634
./strace-static-x86_64: Process 634 attached
[pid 634] set_robust_list(0x5555560865e0, 24) = 0
[pid 634] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 634] setpgid(0, 0) = 0
[pid 634] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 634] write(3, "1000", 4) = 4
[pid 634] close(3) = 0
[pid 634] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 634] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 634] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 634] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 635 attached
<unfinished ...>
[pid 635] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 634] <... clone resumed>, parent_tid=[635], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 635
[pid 635] <... set_robust_list resumed>) = 0
[pid 634] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 635] mkdir("./file0", 000 <unfinished ...>
[pid 634] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 635] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 635] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 634] <... futex resumed>) = 0
[pid 635] <... futex resumed>) = 1
[pid 634] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 635] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 634] <... futex resumed>) = 0
[pid 634] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 635] <... mount resumed>) = 0
[pid 635] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 634] <... futex resumed>) = 0
[pid 634] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 634] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 635] <... futex resumed>) = 1
[pid 635] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 635] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 634] <... futex resumed>) = 0
[pid 634] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 634] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 634] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 634] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 634] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 636 attached
, parent_tid=[636], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 636
[pid 634] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 634] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 636] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 635] <... futex resumed>) = 1
[pid 635] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 636] <... set_robust_list resumed>) = 0
[pid 636] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 635] <... umount2 resumed>) = 0
[pid 635] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 635] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 636] <... umount2 resumed>) = 0
[pid 636] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 634] <... futex resumed>) = 0
[pid 634] exit_group(0) = ?
[pid 635] <... futex resumed>) = ?
[pid 636] +++ exited with 0 +++
[pid 635] +++ exited with 0 +++
[pid 634] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=634, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 637
./strace-static-x86_64: Process 637 attached
[pid 637] set_robust_list(0x5555560865e0, 24) = 0
[pid 637] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 637] setpgid(0, 0) = 0
[pid 637] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 637] write(3, "1000", 4) = 4
[pid 637] close(3) = 0
[pid 637] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 637] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 637] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 637] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 638 attached
<unfinished ...>
[pid 638] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 638] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 637] <... clone resumed>, parent_tid=[638], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 638
[pid 637] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 638] <... futex resumed>) = 0
[pid 638] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 638] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 638] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 637] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 637] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 638] <... futex resumed>) = 0
[pid 637] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 638] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 638] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 638] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 637] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 637] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 638] <... futex resumed>) = 0
[pid 638] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 637] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 638] <... mount resumed>) = 0
[pid 638] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 638] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 637] <... futex resumed>) = 0
[pid 637] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 638] <... futex resumed>) = 0
[pid 637] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 638] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 637] <... futex resumed>) = 0
[pid 637] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 638] <... umount2 resumed>) = 0
[pid 637] <... mmap resumed>) = 0x7f236e446000
[pid 638] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 637] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 638] <... futex resumed>) = 0
[pid 638] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 637] <... mprotect resumed>) = 0
[pid 637] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 639 attached
, parent_tid=[639], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 639
[pid 639] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 637] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 639] <... set_robust_list resumed>) = 0
[pid 637] <... futex resumed>) = 0
[pid 639] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 637] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 639] <... umount2 resumed>) = 0
[pid 639] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 637] <... futex resumed>) = 0
[pid 639] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 637] exit_group(0) = ?
[pid 639] <... futex resumed>) = ?
[pid 638] <... futex resumed>) = ?
[pid 638] +++ exited with 0 +++
[pid 639] +++ exited with 0 +++
[pid 637] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=637, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 640 attached
, child_tidptr=0x5555560865d0) = 640
[pid 640] set_robust_list(0x5555560865e0, 24) = 0
[pid 640] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 640] setpgid(0, 0) = 0
[pid 640] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 640] write(3, "1000", 4) = 4
[pid 640] close(3) = 0
[pid 640] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 640] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 640] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 640] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 641 attached
, parent_tid=[641], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 641
[pid 641] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 641] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 640] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 641] <... futex resumed>) = 0
[pid 641] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 641] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 641] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 640] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 640] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 641] <... futex resumed>) = 0
[pid 641] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 640] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 641] <... mount resumed>) = 0
[pid 641] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 641] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 640] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 640] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 641] <... futex resumed>) = 0
[pid 641] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 640] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 641] <... mount resumed>) = 0
[pid 641] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 641] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 640] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 640] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 641] <... futex resumed>) = 0
[pid 641] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 640] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 641] <... umount2 resumed>) = 0
[pid 640] <... futex resumed>) = 0
[pid 641] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 641] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 640] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 640] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 640] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 642 attached
<unfinished ...>
[pid 642] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 640] <... clone resumed>, parent_tid=[642], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 642
[pid 642] <... set_robust_list resumed>) = 0
[pid 640] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 642] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 640] <... futex resumed>) = 0
[pid 640] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 642] <... umount2 resumed>) = 0
[pid 642] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 640] <... futex resumed>) = 0
[pid 642] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 640] exit_group(0) = ?
[pid 642] <... futex resumed>) = ?
[pid 641] <... futex resumed>) = ?
[pid 641] +++ exited with 0 +++
[pid 642] +++ exited with 0 +++
[pid 640] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=640, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 643
./strace-static-x86_64: Process 643 attached
[pid 643] set_robust_list(0x5555560865e0, 24) = 0
[pid 643] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 643] setpgid(0, 0) = 0
[pid 643] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 643] write(3, "1000", 4) = 4
[pid 643] close(3) = 0
[pid 643] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 643] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 643] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 643] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[644], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 644
[pid 643] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 643] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 644 attached
<unfinished ...>
[pid 644] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 644] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 644] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 643] <... futex resumed>) = 0
[pid 643] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 643] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 644] <... futex resumed>) = 1
[pid 644] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 644] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 643] <... futex resumed>) = 0
[pid 644] <... futex resumed>) = 1
[pid 643] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 644] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 643] <... futex resumed>) = 0
[pid 643] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 644] <... mount resumed>) = 0
[pid 644] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 643] <... futex resumed>) = 0
[pid 644] <... futex resumed>) = 1
[pid 643] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 644] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 643] <... futex resumed>) = 0
[pid 643] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 643] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 643] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 643] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 645 attached
<unfinished ...>
[pid 644] <... umount2 resumed>) = 0
[pid 643] <... clone resumed>, parent_tid=[645], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 645
[pid 645] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 644] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 643] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 645] <... set_robust_list resumed>) = 0
[pid 644] <... futex resumed>) = 0
[pid 645] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 644] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 643] <... futex resumed>) = 0
[pid 643] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 645] <... umount2 resumed>) = 0
[pid 645] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 643] <... futex resumed>) = 0
[pid 643] exit_group(0) = ?
[pid 644] <... futex resumed>) = 231
[pid 644] +++ exited with 0 +++
[pid 645] +++ exited with 0 +++
[pid 643] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=643, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 646
./strace-static-x86_64: Process 646 attached
[pid 646] set_robust_list(0x5555560865e0, 24) = 0
[pid 646] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 646] setpgid(0, 0) = 0
[pid 646] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 646] write(3, "1000", 4) = 4
[pid 646] close(3) = 0
[pid 646] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 646] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 646] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 646] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 647 attached
, parent_tid=[647], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 647
[pid 647] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 646] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 647] <... set_robust_list resumed>) = 0
[pid 646] <... futex resumed>) = 0
[pid 646] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 647] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 647] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 646] <... futex resumed>) = 0
[pid 646] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 646] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 647] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 647] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 646] <... futex resumed>) = 0
[pid 646] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 646] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 647] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 647] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 646] <... futex resumed>) = 0
[pid 647] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 646] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 646] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 646] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 646] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 647] <... umount2 resumed>) = 0
[pid 646] <... mprotect resumed>) = 0
[pid 646] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 647] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 648 attached
[pid 647] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 646] <... clone resumed>, parent_tid=[648], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 648
[pid 648] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 646] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 648] <... set_robust_list resumed>) = 0
[pid 646] <... futex resumed>) = 0
[pid 648] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 646] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 648] <... umount2 resumed>) = 0
[pid 648] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 646] <... futex resumed>) = 0
[pid 648] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 646] exit_group(0) = ?
[pid 647] <... futex resumed>) = ?
[pid 648] <... futex resumed>) = 231
[pid 647] +++ exited with 0 +++
[pid 648] +++ exited with 0 +++
[pid 646] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=646, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 649 attached
, child_tidptr=0x5555560865d0) = 649
[pid 649] set_robust_list(0x5555560865e0, 24) = 0
[pid 649] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 649] setpgid(0, 0) = 0
[pid 649] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 649] write(3, "1000", 4) = 4
[pid 649] close(3) = 0
[pid 649] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 649] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 649] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 649] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[650], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 650
[pid 649] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 649] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 650 attached
<unfinished ...>
[pid 650] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 650] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 650] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 649] <... futex resumed>) = 0
[pid 649] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 649] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 650] <... futex resumed>) = 1
[pid 650] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 650] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 649] <... futex resumed>) = 0
[pid 649] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 649] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 650] <... futex resumed>) = 1
[pid 650] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 650] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 649] <... futex resumed>) = 0
[pid 649] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 649] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 649] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 649] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 649] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[651], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 651
[pid 649] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 649] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 650] <... futex resumed>) = 1
[pid 650] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 651 attached
<unfinished ...>
[pid 651] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 650] <... umount2 resumed>) = 0
[pid 651] <... set_robust_list resumed>) = 0
[pid 650] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 651] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 650] <... futex resumed>) = 0
[pid 650] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 651] <... umount2 resumed>) = 0
[pid 651] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 649] <... futex resumed>) = 0
[pid 651] <... futex resumed>) = 1
[pid 651] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 649] exit_group(0) = ?
[pid 651] <... futex resumed>) = ?
[pid 650] <... futex resumed>) = ?
[pid 650] +++ exited with 0 +++
[pid 651] +++ exited with 0 +++
[pid 649] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=649, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 652
./strace-static-x86_64: Process 652 attached
[pid 652] set_robust_list(0x5555560865e0, 24) = 0
[pid 652] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 652] setpgid(0, 0) = 0
[pid 652] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 652] write(3, "1000", 4) = 4
[pid 652] close(3) = 0
[pid 652] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 652] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 652] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 652] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[653], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 653
[pid 652] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 652] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 653 attached
<unfinished ...>
[pid 653] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 653] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 653] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 652] <... futex resumed>) = 0
[pid 652] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 652] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 653] <... futex resumed>) = 1
[pid 653] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 653] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 652] <... futex resumed>) = 0
[pid 652] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 652] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 653] <... futex resumed>) = 1
[pid 653] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 653] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 652] <... futex resumed>) = 0
[pid 653] <... futex resumed>) = 1
[pid 652] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 653] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 652] <... futex resumed>) = 0
[pid 652] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 652] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 652] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 652] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 653] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 654 attached
[pid 653] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 654] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 652] <... clone resumed>, parent_tid=[654], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 654
[pid 654] <... set_robust_list resumed>) = 0
[pid 653] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 654] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 652] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 652] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 654] <... umount2 resumed>) = 0
[pid 654] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 652] <... futex resumed>) = 0
[pid 654] <... futex resumed>) = 1
[pid 652] exit_group(0 <unfinished ...>
[pid 654] ????( <unfinished ...>
[pid 652] <... exit_group resumed>) = ?
[pid 653] <... futex resumed>) = ?
[pid 653] +++ exited with 0 +++
[pid 654] <... ???? resumed>) = ?
[pid 654] +++ exited with 0 +++
[pid 652] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=652, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 655
./strace-static-x86_64: Process 655 attached
[pid 655] set_robust_list(0x5555560865e0, 24) = 0
[pid 655] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 655] setpgid(0, 0) = 0
[pid 655] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 655] write(3, "1000", 4) = 4
[pid 655] close(3) = 0
[pid 655] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 655] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 655] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 655] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 656 attached
<unfinished ...>
[pid 656] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 655] <... clone resumed>, parent_tid=[656], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 656
[pid 655] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 655] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 656] <... set_robust_list resumed>) = 0
[pid 656] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 656] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 655] <... futex resumed>) = 0
[pid 655] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 655] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 656] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 656] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 655] <... futex resumed>) = 0
[pid 656] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 655] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 655] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 656] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 656] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 656] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 656] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 655] <... futex resumed>) = 0
[pid 655] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 655] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 655] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 655] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 655] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 656] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 656] umount2("./file0", MNT_DETACH) = 0
[pid 656] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 655] <... clone resumed>, parent_tid=[657], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 657
[pid 656] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 655] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 655] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 657 attached
<unfinished ...>
[pid 657] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 657] umount2("./file0", MNT_DETACH) = 0
[pid 657] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 655] <... futex resumed>) = 0
[pid 655] exit_group(0) = ?
[pid 656] <... futex resumed>) = ?
[pid 656] +++ exited with 0 +++
[pid 657] +++ exited with 0 +++
[pid 655] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=655, si_uid=0, si_status=0, si_utime=0, si_stime=1} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 658
./strace-static-x86_64: Process 658 attached
[pid 658] set_robust_list(0x5555560865e0, 24) = 0
[pid 658] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 658] setpgid(0, 0) = 0
[pid 658] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 658] write(3, "1000", 4) = 4
[pid 658] close(3) = 0
[pid 658] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 658] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 658] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 658] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[659], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 659
[pid 658] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 658] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 659 attached
<unfinished ...>
[pid 659] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 659] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 659] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 658] <... futex resumed>) = 0
[pid 658] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 658] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 659] <... futex resumed>) = 1
[pid 659] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 659] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 658] <... futex resumed>) = 0
[pid 658] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 658] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 659] <... futex resumed>) = 1
[pid 659] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 659] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 658] <... futex resumed>) = 0
[pid 658] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 658] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 658] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 658] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 658] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 659] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 658] <... clone resumed>, parent_tid=[660], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 660
[pid 658] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 658] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 660 attached
<unfinished ...>
[pid 659] <... umount2 resumed>) = 0
[pid 660] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 660] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 659] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 660] <... umount2 resumed>) = 0
[pid 659] <... futex resumed>) = 0
[pid 660] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 658] <... futex resumed>) = 0
[pid 658] exit_group(0) = ?
[pid 659] +++ exited with 0 +++
[pid 660] <... futex resumed>) = ?
[pid 660] +++ exited with 0 +++
[pid 658] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=658, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 661
./strace-static-x86_64: Process 661 attached
[pid 661] set_robust_list(0x5555560865e0, 24) = 0
[pid 661] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 661] setpgid(0, 0) = 0
[pid 661] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 661] write(3, "1000", 4) = 4
[pid 661] close(3) = 0
[pid 661] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 661] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 661] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 661] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 662 attached
, parent_tid=[662], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 662
[pid 662] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 662] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 661] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 662] <... futex resumed>) = 0
[pid 661] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 662] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 662] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 662] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 661] <... futex resumed>) = 0
[pid 661] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 662] <... futex resumed>) = 0
[pid 661] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 662] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 662] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 661] <... futex resumed>) = 0
[pid 662] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 661] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 662] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 661] <... futex resumed>) = 0
[pid 662] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 661] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 662] <... mount resumed>) = 0
[pid 662] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 661] <... futex resumed>) = 0
[pid 662] <... futex resumed>) = 1
[pid 661] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 662] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 661] <... futex resumed>) = 0
[pid 661] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 661] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 661] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 661] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 662] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 663 attached
[pid 663] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 661] <... clone resumed>, parent_tid=[663], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 663
[pid 661] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 661] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 662] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 662] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 663] umount2("./file0", MNT_DETACH) = 0
[pid 663] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 661] <... futex resumed>) = 0
[pid 661] exit_group(0) = ?
[pid 662] <... futex resumed>) = ?
[pid 662] +++ exited with 0 +++
[pid 663] +++ exited with 0 +++
[pid 661] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=661, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 664
./strace-static-x86_64: Process 664 attached
[pid 664] set_robust_list(0x5555560865e0, 24) = 0
[pid 664] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 664] setpgid(0, 0) = 0
[pid 664] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 664] write(3, "1000", 4) = 4
[pid 664] close(3) = 0
[pid 664] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 664] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 664] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 664] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[665], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 665
[pid 664] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 664] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 665 attached
<unfinished ...>
[pid 665] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 665] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 665] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 664] <... futex resumed>) = 0
[pid 664] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 664] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 665] <... futex resumed>) = 1
[pid 665] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 665] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 664] <... futex resumed>) = 0
[pid 664] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 664] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 665] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 665] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 664] <... futex resumed>) = 0
[pid 664] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 664] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 664] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 664] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 664] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[666], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 666
./strace-static-x86_64: Process 666 attached
[pid 664] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 666] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 664] <... futex resumed>) = 0
[pid 666] <... set_robust_list resumed>) = 0
[pid 665] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 664] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 666] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 665] <... umount2 resumed>) = 0
[pid 665] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 665] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 666] <... umount2 resumed>) = 0
[pid 666] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 664] <... futex resumed>) = 0
[pid 666] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 664] exit_group(0) = ?
[pid 665] <... futex resumed>) = ?
[pid 665] +++ exited with 0 +++
[pid 666] <... futex resumed>) = ?
[pid 666] +++ exited with 0 +++
[pid 664] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=664, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 667
./strace-static-x86_64: Process 667 attached
[pid 667] set_robust_list(0x5555560865e0, 24) = 0
[pid 667] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 667] setpgid(0, 0) = 0
[pid 667] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 667] write(3, "1000", 4) = 4
[pid 667] close(3) = 0
[pid 667] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 667] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 667] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 667] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 668 attached
, parent_tid=[668], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 668
[pid 668] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 668] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 667] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 668] <... futex resumed>) = 0
[pid 668] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 668] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 668] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 667] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 667] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 668] <... futex resumed>) = 0
[pid 667] <... futex resumed>) = 1
[pid 668] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 667] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 668] <... mount resumed>) = 0
[pid 668] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 668] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 667] <... futex resumed>) = 0
[pid 667] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 668] <... futex resumed>) = 0
[pid 667] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 668] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 668] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 668] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 667] <... futex resumed>) = 0
[pid 667] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 668] <... futex resumed>) = 0
[pid 668] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 667] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 667] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 668] <... umount2 resumed>) = 0
[pid 668] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 668] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 667] <... mmap resumed>) = 0x7f236e446000
[pid 667] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 667] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[669], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 669
./strace-static-x86_64: Process 669 attached
[pid 669] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 669] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 667] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 669] <... futex resumed>) = 0
[pid 669] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 667] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 669] <... umount2 resumed>) = 0
[pid 669] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 667] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 669] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 667] exit_group(0 <unfinished ...>
[pid 668] <... futex resumed>) = ?
[pid 667] <... exit_group resumed>) = ?
[pid 668] +++ exited with 0 +++
[pid 669] <... futex resumed>) = ?
[pid 669] +++ exited with 0 +++
[pid 667] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=667, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 670
./strace-static-x86_64: Process 670 attached
[pid 670] set_robust_list(0x5555560865e0, 24) = 0
[pid 670] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 670] setpgid(0, 0) = 0
[pid 670] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 670] write(3, "1000", 4) = 4
[pid 670] close(3) = 0
[pid 670] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 670] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 670] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 670] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 671 attached
<unfinished ...>
[pid 671] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 671] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 670] <... clone resumed>, parent_tid=[671], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 671
[pid 670] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 671] <... futex resumed>) = 0
[pid 670] <... futex resumed>) = 1
[pid 671] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 671] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 671] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 670] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 670] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 671] <... futex resumed>) = 0
[pid 670] <... futex resumed>) = 1
[pid 671] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 670] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 671] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 671] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 670] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 670] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 671] <... futex resumed>) = 0
[pid 670] <... futex resumed>) = 1
[pid 671] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 670] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 671] <... mount resumed>) = 0
[pid 671] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 670] <... futex resumed>) = 0
[pid 671] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 670] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 670] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 670] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 671] <... umount2 resumed>) = 0
[pid 671] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 670] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 671] <... futex resumed>) = 0
[pid 671] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 670] <... mprotect resumed>) = 0
[pid 670] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 672 attached
, parent_tid=[672], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 672
[pid 672] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 670] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 672] <... set_robust_list resumed>) = 0
[pid 670] <... futex resumed>) = 0
[pid 672] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 670] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 672] <... umount2 resumed>) = 0
[pid 672] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 672] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 670] <... futex resumed>) = 0
[pid 670] exit_group(0) = ?
[pid 671] <... futex resumed>) = ?
[pid 671] +++ exited with 0 +++
[pid 672] <... futex resumed>) = ?
[pid 672] +++ exited with 0 +++
[pid 670] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=670, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 673
./strace-static-x86_64: Process 673 attached
[pid 673] set_robust_list(0x5555560865e0, 24) = 0
[pid 673] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 673] setpgid(0, 0) = 0
[pid 673] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 673] write(3, "1000", 4) = 4
[pid 673] close(3) = 0
[pid 673] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 673] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 673] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 673] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 674 attached
, parent_tid=[674], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 674
[pid 674] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 673] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 674] <... set_robust_list resumed>) = 0
[pid 673] <... futex resumed>) = 0
[pid 674] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 674] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 674] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 673] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 673] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 673] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 674] <... futex resumed>) = 0
[pid 674] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 674] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 673] <... futex resumed>) = 0
[pid 674] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 673] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 674] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 673] <... futex resumed>) = 0
[pid 674] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 673] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 674] <... mount resumed>) = 0
[pid 674] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 673] <... futex resumed>) = 0
[pid 673] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 674] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 673] <... futex resumed>) = 0
[pid 673] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 674] <... umount2 resumed>) = 0
[pid 673] <... futex resumed>) = 0
[pid 674] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 673] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 674] <... futex resumed>) = 0
[pid 674] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 673] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 673] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 675 attached
, parent_tid=[675], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 675
[pid 673] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 673] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 675] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 675] umount2("./file0", MNT_DETACH) = 0
[pid 675] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 673] <... futex resumed>) = 0
[pid 673] exit_group(0) = ?
[pid 674] <... futex resumed>) = ?
[pid 674] +++ exited with 0 +++
[pid 675] +++ exited with 0 +++
[pid 673] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=673, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 676
./strace-static-x86_64: Process 676 attached
[pid 676] set_robust_list(0x5555560865e0, 24) = 0
[pid 676] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 676] setpgid(0, 0) = 0
[pid 676] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 676] write(3, "1000", 4) = 4
[pid 676] close(3) = 0
[pid 676] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 676] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 676] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 676] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 677 attached
<unfinished ...>
[pid 677] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 677] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 676] <... clone resumed>, parent_tid=[677], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 677
[pid 676] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 677] <... futex resumed>) = 0
[pid 677] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 677] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 677] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 676] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 676] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 677] <... futex resumed>) = 0
[pid 676] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 677] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 677] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 676] <... futex resumed>) = 0
[pid 677] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 676] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 676] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 677] <... mount resumed>) = 0
[pid 677] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 676] <... futex resumed>) = 0
[pid 677] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 676] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 676] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 676] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 676] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 676] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 677] <... umount2 resumed>) = 0
[pid 677] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 676] <... clone resumed>, parent_tid=[678], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 678
[pid 677] <... futex resumed>) = 0
[pid 676] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 677] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 676] <... futex resumed>) = 0
./strace-static-x86_64: Process 678 attached
[pid 676] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 678] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 678] umount2("./file0", MNT_DETACH) = 0
[pid 678] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 676] <... futex resumed>) = 0
[pid 678] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 676] exit_group(0) = ?
[pid 677] <... futex resumed>) = ?
[pid 677] +++ exited with 0 +++
[pid 678] <... futex resumed>) = ?
[pid 678] +++ exited with 0 +++
[pid 676] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=676, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 679
./strace-static-x86_64: Process 679 attached
[pid 679] set_robust_list(0x5555560865e0, 24) = 0
[pid 679] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 679] setpgid(0, 0) = 0
[pid 679] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 679] write(3, "1000", 4) = 4
[pid 679] close(3) = 0
[pid 679] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 679] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 679] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 679] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 680 attached
, parent_tid=[680], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 680
[pid 680] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 679] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 680] <... set_robust_list resumed>) = 0
[pid 679] <... futex resumed>) = 0
[pid 679] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 680] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 680] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 679] <... futex resumed>) = 0
[pid 680] <... futex resumed>) = 1
[pid 679] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 680] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 679] <... futex resumed>) = 0
[pid 679] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 680] <... mount resumed>) = 0
[pid 680] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 679] <... futex resumed>) = 0
[pid 679] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 680] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 679] <... futex resumed>) = 0
[pid 679] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 680] <... mount resumed>) = 0
[pid 680] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 679] <... futex resumed>) = 0
[pid 680] <... futex resumed>) = 1
[pid 679] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 680] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 679] <... futex resumed>) = 0
[pid 679] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 679] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 679] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 679] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 680] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 681 attached
[pid 680] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 679] <... clone resumed>, parent_tid=[681], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 681
[pid 681] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 680] <... futex resumed>) = 0
[pid 681] <... set_robust_list resumed>) = 0
[pid 679] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 680] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 681] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 679] <... futex resumed>) = 0
[pid 679] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 681] <... umount2 resumed>) = 0
[pid 681] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 679] <... futex resumed>) = 0
[pid 679] exit_group(0 <unfinished ...>
[pid 681] ????( <unfinished ...>
[pid 679] <... exit_group resumed>) = ?
[pid 680] <... futex resumed>) = ?
[pid 680] +++ exited with 0 +++
[pid 681] <... ???? resumed>) = ?
[pid 681] +++ exited with 0 +++
[pid 679] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=679, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 682
./strace-static-x86_64: Process 682 attached
[pid 682] set_robust_list(0x5555560865e0, 24) = 0
[pid 682] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 682] setpgid(0, 0) = 0
[pid 682] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 682] write(3, "1000", 4) = 4
[pid 682] close(3) = 0
[pid 682] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 682] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 682] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 682] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 683 attached
, parent_tid=[683], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 683
[pid 682] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 682] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 683] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 683] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 683] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 683] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 682] <... futex resumed>) = 0
[pid 682] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 682] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 683] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 683] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 683] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 683] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 682] <... futex resumed>) = 0
[pid 682] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 682] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 683] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 683] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 683] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 682] <... futex resumed>) = 0
[pid 682] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 682] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 682] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 682] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 683] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 682] <... mprotect resumed>) = 0
[pid 682] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[684], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 684
[pid 682] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 682] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 684 attached
<unfinished ...>
[pid 684] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 684] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 683] <... umount2 resumed>) = 0
[pid 683] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 684] <... umount2 resumed>) = 0
[pid 684] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 682] <... futex resumed>) = 0
[pid 683] <... futex resumed>) = 0
[pid 682] exit_group(0) = ?
[pid 684] <... futex resumed>) = ?
[pid 683] +++ exited with 0 +++
[pid 684] +++ exited with 0 +++
[pid 682] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=682, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 685
./strace-static-x86_64: Process 685 attached
[pid 685] set_robust_list(0x5555560865e0, 24) = 0
[pid 685] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 685] setpgid(0, 0) = 0
[pid 685] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 685] write(3, "1000", 4) = 4
[pid 685] close(3) = 0
[pid 685] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 685] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 685] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 685] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 686 attached
, parent_tid=[686], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 686
[pid 686] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 686] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 685] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 686] <... futex resumed>) = 0
[pid 686] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 686] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 686] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 685] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 685] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 686] <... futex resumed>) = 0
[pid 686] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 685] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 686] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 686] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 685] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 685] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 686] <... futex resumed>) = 0
[pid 686] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 685] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 686] <... mount resumed>) = 0
[pid 686] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 686] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 685] <... futex resumed>) = 0
[pid 685] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 686] <... futex resumed>) = 0
[pid 686] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 685] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 686] <... umount2 resumed>) = 0
[pid 686] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 686] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 685] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 685] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 685] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 687 attached
<unfinished ...>
[pid 687] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 687] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 685] <... clone resumed>, parent_tid=[687], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 687
[pid 685] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 687] <... futex resumed>) = 0
[pid 687] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 685] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 687] <... umount2 resumed>) = 0
[pid 687] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 687] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 685] <... futex resumed>) = 0
[pid 685] exit_group(0) = ?
[pid 686] <... futex resumed>) = ?
[pid 686] +++ exited with 0 +++
[pid 687] <... futex resumed>) = ?
[pid 687] +++ exited with 0 +++
[pid 685] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=685, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 688
./strace-static-x86_64: Process 688 attached
[pid 688] set_robust_list(0x5555560865e0, 24) = 0
[pid 688] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 688] setpgid(0, 0) = 0
[pid 688] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 688] write(3, "1000", 4) = 4
[pid 688] close(3) = 0
[pid 688] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 688] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 688] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 688] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 689 attached
, parent_tid=[689], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 689
[pid 689] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 688] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 688] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 689] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 689] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 688] <... futex resumed>) = 0
[pid 689] <... futex resumed>) = 1
[pid 688] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 689] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 688] <... futex resumed>) = 0
[pid 688] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 689] <... mount resumed>) = 0
[pid 689] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 688] <... futex resumed>) = 0
[pid 689] <... futex resumed>) = 1
[pid 688] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 689] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 688] <... futex resumed>) = 0
[pid 688] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 689] <... mount resumed>) = 0
[pid 689] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 688] <... futex resumed>) = 0
[pid 689] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 688] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 689] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 688] <... futex resumed>) = 0
[pid 688] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 689] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 688] <... futex resumed>) = 0
[pid 688] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 688] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 688] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 690 attached
<unfinished ...>
[pid 690] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 688] <... clone resumed>, parent_tid=[690], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 690
[pid 689] <... umount2 resumed>) = 0
[pid 688] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 690] <... set_robust_list resumed>) = 0
[pid 689] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 688] <... futex resumed>) = 0
[pid 690] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 689] <... futex resumed>) = 0
[pid 688] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 689] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 690] <... umount2 resumed>) = 0
[pid 690] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 688] <... futex resumed>) = 0
[pid 690] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 688] exit_group(0) = ?
[pid 689] <... futex resumed>) = ?
[pid 690] <... futex resumed>) = ?
[pid 689] +++ exited with 0 +++
[pid 690] +++ exited with 0 +++
[pid 688] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=688, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 691
./strace-static-x86_64: Process 691 attached
[pid 691] set_robust_list(0x5555560865e0, 24) = 0
[pid 691] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 691] setpgid(0, 0) = 0
[pid 691] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 691] write(3, "1000", 4) = 4
[pid 691] close(3) = 0
[pid 691] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 691] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 691] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 691] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 692 attached
, parent_tid=[692], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 692
[pid 692] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 692] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 691] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 692] <... futex resumed>) = 0
[pid 691] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 692] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 692] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 691] <... futex resumed>) = 0
[pid 692] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 691] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 692] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 691] <... futex resumed>) = 0
[pid 692] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 691] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 692] <... mount resumed>) = 0
[pid 692] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 691] <... futex resumed>) = 0
[pid 691] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 692] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 691] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 692] <... mount resumed>) = 0
[pid 692] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 691] <... futex resumed>) = 0
[pid 691] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 691] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 691] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 691] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 691] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 692] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 691] <... clone resumed>, parent_tid=[693], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 693
[pid 691] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 691] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 693 attached
<unfinished ...>
[pid 693] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 693] umount2("./file0", MNT_DETACH) = 0
[pid 692] <... umount2 resumed>) = 0
[pid 693] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 692] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 691] <... futex resumed>) = 0
[pid 691] exit_group(0) = ?
[pid 693] <... futex resumed>) = ?
[pid 693] +++ exited with 0 +++
[pid 692] +++ exited with 0 +++
[pid 691] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=691, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 694
./strace-static-x86_64: Process 694 attached
[pid 694] set_robust_list(0x5555560865e0, 24) = 0
[pid 694] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 694] setpgid(0, 0) = 0
[pid 694] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 694] write(3, "1000", 4) = 4
[pid 694] close(3) = 0
[pid 694] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 694] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 694] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 694] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 695 attached
<unfinished ...>
[pid 695] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 695] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 694] <... clone resumed>, parent_tid=[695], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 695
[pid 694] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 695] <... futex resumed>) = 0
[pid 695] mkdir("./file0", 000 <unfinished ...>
[pid 694] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 695] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 695] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 694] <... futex resumed>) = 0
[pid 694] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 694] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 695] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 695] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 694] <... futex resumed>) = 0
[pid 694] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 694] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 695] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 695] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 694] <... futex resumed>) = 0
[pid 694] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 694] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 694] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 694] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 694] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[696], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 696
./strace-static-x86_64: Process 696 attached
[pid 694] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 694] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 695] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 696] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 695] <... umount2 resumed>) = 0
[pid 695] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 695] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 696] <... set_robust_list resumed>) = 0
[pid 696] umount2("./file0", MNT_DETACH) = 0
[pid 696] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 694] <... futex resumed>) = 0
[pid 696] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 694] exit_group(0 <unfinished ...>
[pid 696] <... futex resumed>) = 231
[pid 695] <... futex resumed>) = ?
[pid 694] <... exit_group resumed>) = ?
[pid 695] +++ exited with 0 +++
[pid 696] +++ exited with 0 +++
[pid 694] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=694, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 697
./strace-static-x86_64: Process 697 attached
[pid 697] set_robust_list(0x5555560865e0, 24) = 0
[pid 697] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 697] setpgid(0, 0) = 0
[pid 697] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 697] write(3, "1000", 4) = 4
[pid 697] close(3) = 0
[pid 697] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 697] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 697] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 697] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 698 attached
<unfinished ...>
[pid 698] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 698] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 697] <... clone resumed>, parent_tid=[698], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 698
[pid 697] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 698] <... futex resumed>) = 0
[pid 698] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 698] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 698] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 697] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 697] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 698] <... futex resumed>) = 0
[pid 697] <... futex resumed>) = 1
[pid 698] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 697] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 698] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 698] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 697] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 697] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 698] <... futex resumed>) = 0
[pid 698] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 697] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 698] <... mount resumed>) = 0
[pid 698] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 698] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 697] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 697] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 698] <... futex resumed>) = 0
[pid 698] umount2("./file0", MNT_DETACH) = 0
[pid 697] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 698] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 698] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 697] <... futex resumed>) = 0
[pid 697] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 697] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 697] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 699 attached
<unfinished ...>
[pid 699] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 699] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 697] <... clone resumed>, parent_tid=[699], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 699
[pid 697] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 699] <... futex resumed>) = 0
[pid 697] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 699] umount2("./file0", MNT_DETACH) = 0
[pid 699] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 699] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 697] <... futex resumed>) = 0
[pid 697] exit_group(0) = ?
[pid 698] <... futex resumed>) = ?
[pid 698] +++ exited with 0 +++
[pid 699] <... futex resumed>) = ?
[pid 699] +++ exited with 0 +++
[pid 697] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=697, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 700
./strace-static-x86_64: Process 700 attached
[pid 700] set_robust_list(0x5555560865e0, 24) = 0
[pid 700] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 700] setpgid(0, 0) = 0
[pid 700] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 700] write(3, "1000", 4) = 4
[pid 700] close(3) = 0
[pid 700] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 700] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 700] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 700] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 701 attached
<unfinished ...>
[pid 701] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 701] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 700] <... clone resumed>, parent_tid=[701], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 701
[pid 700] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 701] <... futex resumed>) = 0
[pid 701] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 701] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 700] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 701] <... futex resumed>) = 0
[pid 701] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 700] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 700] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 701] <... futex resumed>) = 0
[pid 701] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 700] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 701] <... mount resumed>) = 0
[pid 701] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 700] <... futex resumed>) = 0
[pid 700] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 700] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 701] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 701] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 700] <... futex resumed>) = 0
[pid 700] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 700] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 700] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 700] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 700] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[702], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 702
[pid 700] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 700] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 701] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 702 attached
<unfinished ...>
[pid 702] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 702] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 701] <... umount2 resumed>) = 0
[pid 701] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 701] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 702] <... umount2 resumed>) = 0
[pid 702] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 700] <... futex resumed>) = 0
[pid 700] exit_group(0) = ?
[pid 702] <... futex resumed>) = ?
[pid 702] +++ exited with 0 +++
[pid 701] <... futex resumed>) = ?
[pid 701] +++ exited with 0 +++
[pid 700] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=700, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 703
./strace-static-x86_64: Process 703 attached
[pid 703] set_robust_list(0x5555560865e0, 24) = 0
[pid 703] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 703] setpgid(0, 0) = 0
[pid 703] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 703] write(3, "1000", 4) = 4
[pid 703] close(3) = 0
[pid 703] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 703] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 703] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 703] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 704 attached
, parent_tid=[704], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 704
[pid 704] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 704] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 703] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 704] <... futex resumed>) = 0
[pid 704] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 703] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 704] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 704] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 703] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 703] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 704] <... futex resumed>) = 0
[pid 703] <... futex resumed>) = 1
[pid 704] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 703] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 704] <... mount resumed>) = 0
[pid 704] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 704] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 703] <... futex resumed>) = 0
[pid 703] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 704] <... futex resumed>) = 0
[pid 704] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 703] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 704] <... mount resumed>) = 0
[pid 704] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 703] <... futex resumed>) = 0
[pid 704] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 703] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 704] <... futex resumed>) = 0
[pid 703] <... futex resumed>) = 1
[pid 704] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 703] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 703] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 704] <... umount2 resumed>) = 0
[pid 704] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 703] <... mmap resumed>) = 0x7f236e446000
[pid 704] <... futex resumed>) = 0
[pid 703] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 704] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 703] <... mprotect resumed>) = 0
[pid 703] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 705 attached
, parent_tid=[705], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 705
[pid 705] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 705] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 703] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 705] <... futex resumed>) = 0
[pid 703] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 705] umount2("./file0", MNT_DETACH) = 0
[pid 705] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 705] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 703] <... futex resumed>) = 0
[pid 703] exit_group(0 <unfinished ...>
[pid 704] <... futex resumed>) = ? <unavailable>
[pid 703] <... exit_group resumed>) = ?
[pid 705] <... futex resumed>) = ?
[pid 705] +++ exited with 0 +++
[pid 704] +++ exited with 0 +++
[pid 703] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=703, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 706
./strace-static-x86_64: Process 706 attached
[pid 706] set_robust_list(0x5555560865e0, 24) = 0
[pid 706] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 706] setpgid(0, 0) = 0
[pid 706] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 706] write(3, "1000", 4) = 4
[pid 706] close(3) = 0
[pid 706] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 706] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 706] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 706] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 707 attached
, parent_tid=[707], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 707
[pid 707] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 706] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 707] <... set_robust_list resumed>) = 0
[pid 706] <... futex resumed>) = 0
[pid 706] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 707] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 707] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 706] <... futex resumed>) = 0
[pid 707] <... futex resumed>) = 1
[pid 706] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 707] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 706] <... futex resumed>) = 0
[pid 706] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 707] <... mount resumed>) = 0
[pid 707] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 706] <... futex resumed>) = 0
[pid 707] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 706] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 707] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 706] <... futex resumed>) = 0
[pid 707] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 706] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 707] <... mount resumed>) = 0
[pid 707] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 706] <... futex resumed>) = 0
[pid 706] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 707] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 706] <... futex resumed>) = 0
[pid 706] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 706] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 706] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 706] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 707] <... umount2 resumed>) = 0
[pid 707] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 706] <... clone resumed>, parent_tid=[708], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 708
[pid 706] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 707] <... futex resumed>) = 0
[pid 706] <... futex resumed>) = 0
[pid 707] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 706] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 708 attached
<unfinished ...>
[pid 708] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 708] umount2("./file0", MNT_DETACH) = 0
[pid 708] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 706] <... futex resumed>) = 0
[pid 706] exit_group(0) = ?
[pid 707] <... futex resumed>) = ?
[pid 707] +++ exited with 0 +++
[pid 708] +++ exited with 0 +++
[pid 706] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=706, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 709
./strace-static-x86_64: Process 709 attached
[pid 709] set_robust_list(0x5555560865e0, 24) = 0
[pid 709] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 709] setpgid(0, 0) = 0
[pid 709] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 709] write(3, "1000", 4) = 4
[pid 709] close(3) = 0
[pid 709] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 709] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 709] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 709] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 710 attached
<unfinished ...>
[pid 710] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 709] <... clone resumed>, parent_tid=[710], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 710
[pid 710] <... set_robust_list resumed>) = 0
[pid 710] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 709] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 710] <... futex resumed>) = 0
[pid 709] <... futex resumed>) = 1
[pid 710] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 710] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 710] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 709] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 709] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 710] <... futex resumed>) = 0
[pid 709] <... futex resumed>) = 1
[pid 710] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 710] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 710] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 709] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 709] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 710] <... futex resumed>) = 0
[pid 709] <... futex resumed>) = 1
[pid 710] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 709] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 710] <... mount resumed>) = 0
[pid 710] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 709] <... futex resumed>) = 0
[pid 709] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 709] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 710] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 709] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 709] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 710] <... umount2 resumed>) = 0
[pid 709] <... mprotect resumed>) = 0
[pid 709] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 711 attached
<unfinished ...>
[pid 710] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 709] <... clone resumed>, parent_tid=[711], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 711
[pid 711] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 710] <... futex resumed>) = 0
[pid 709] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 711] <... set_robust_list resumed>) = 0
[pid 710] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 709] <... futex resumed>) = 0
[pid 711] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 709] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 711] <... umount2 resumed>) = 0
[pid 711] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 709] <... futex resumed>) = 0
[pid 709] exit_group(0 <unfinished ...>
[pid 710] <... futex resumed>) = ?
[pid 710] +++ exited with 0 +++
[pid 709] <... exit_group resumed>) = ?
[pid 711] +++ exited with 0 +++
[pid 709] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=709, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 712 attached
, child_tidptr=0x5555560865d0) = 712
[pid 712] set_robust_list(0x5555560865e0, 24) = 0
[pid 712] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 712] setpgid(0, 0) = 0
[pid 712] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 712] write(3, "1000", 4) = 4
[pid 712] close(3) = 0
[pid 712] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 712] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 712] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 712] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 713 attached
<unfinished ...>
[pid 713] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 712] <... clone resumed>, parent_tid=[713], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 713
[pid 713] <... set_robust_list resumed>) = 0
[pid 713] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 712] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 712] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 713] <... futex resumed>) = 0
[pid 713] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 713] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 713] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 712] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 712] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 713] <... futex resumed>) = 0
[pid 713] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 712] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 713] <... mount resumed>) = 0
[pid 713] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 713] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 712] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 712] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 713] <... futex resumed>) = 0
[pid 713] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 712] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 713] <... mount resumed>) = 0
[pid 713] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 713] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 712] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 712] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 713] <... futex resumed>) = 0
[pid 713] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 712] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 713] <... umount2 resumed>) = 0
[pid 713] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 713] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 712] <... futex resumed>) = 0
[pid 712] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 712] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 712] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[714], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 714
./strace-static-x86_64: Process 714 attached
[pid 714] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 714] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 712] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 714] <... futex resumed>) = 0
[pid 714] umount2("./file0", MNT_DETACH) = 0
[pid 712] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 714] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 714] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 712] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 712] exit_group(0 <unfinished ...>
[pid 713] <... futex resumed>) = ?
[pid 712] <... exit_group resumed>) = ?
[pid 713] +++ exited with 0 +++
[pid 714] <... futex resumed>) = ?
[pid 714] +++ exited with 0 +++
[pid 712] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=712, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 715
./strace-static-x86_64: Process 715 attached
[pid 715] set_robust_list(0x5555560865e0, 24) = 0
[pid 715] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 715] setpgid(0, 0) = 0
[pid 715] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 715] write(3, "1000", 4) = 4
[pid 715] close(3) = 0
[pid 715] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 715] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 715] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 715] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 716 attached
, parent_tid=[716], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 716
[pid 716] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 716] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 715] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 716] <... futex resumed>) = 0
[pid 715] <... futex resumed>) = 1
[pid 716] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 716] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 716] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 715] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 715] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 716] <... futex resumed>) = 0
[pid 715] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 716] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 716] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 716] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 715] <... futex resumed>) = 0
[pid 715] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 716] <... futex resumed>) = 0
[pid 715] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 716] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 716] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 716] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 715] <... futex resumed>) = 0
[pid 715] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 716] <... futex resumed>) = 0
[pid 715] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 716] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 715] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 715] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 716] <... umount2 resumed>) = 0
[pid 715] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 716] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 716] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 717 attached
<unfinished ...>
[pid 715] <... clone resumed>, parent_tid=[717], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 717
[pid 717] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 715] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 717] <... set_robust_list resumed>) = 0
[pid 715] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 717] umount2("./file0", MNT_DETACH) = 0
[pid 717] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 715] <... futex resumed>) = 0
[pid 715] exit_group(0 <unfinished ...>
[pid 716] <... futex resumed>) = ?
[pid 715] <... exit_group resumed>) = ?
[pid 716] +++ exited with 0 +++
[pid 717] +++ exited with 0 +++
[pid 715] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=715, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 718
./strace-static-x86_64: Process 718 attached
[pid 718] set_robust_list(0x5555560865e0, 24) = 0
[pid 718] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 718] setpgid(0, 0) = 0
[pid 718] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 718] write(3, "1000", 4) = 4
[pid 718] close(3) = 0
[pid 718] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 718] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 718] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 718] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 719 attached
<unfinished ...>
[pid 719] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 719] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 718] <... clone resumed>, parent_tid=[719], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 719
[pid 718] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 719] <... futex resumed>) = 0
[pid 719] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 719] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 719] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 718] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 718] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 719] <... futex resumed>) = 0
[pid 719] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 718] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 719] <... mount resumed>) = 0
[pid 719] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 719] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 718] <... futex resumed>) = 0
[pid 718] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 719] <... futex resumed>) = 0
[pid 719] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 718] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 719] <... mount resumed>) = 0
[pid 719] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 719] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 718] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 718] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 719] <... futex resumed>) = 0
[pid 719] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 718] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 719] <... umount2 resumed>) = 0
[pid 719] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 719] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 718] <... futex resumed>) = 0
[pid 718] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 718] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 718] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 720 attached
, parent_tid=[720], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 720
[pid 720] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 720] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 718] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 720] <... futex resumed>) = 0
[pid 720] umount2("./file0", MNT_DETACH) = 0
[pid 720] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 720] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 718] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 718] exit_group(0 <unfinished ...>
[pid 719] <... futex resumed>) = ?
[pid 718] <... exit_group resumed>) = ?
[pid 719] +++ exited with 0 +++
[pid 720] <... futex resumed>) = ?
[pid 720] +++ exited with 0 +++
[pid 718] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=718, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 721
./strace-static-x86_64: Process 721 attached
[pid 721] set_robust_list(0x5555560865e0, 24) = 0
[pid 721] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 721] setpgid(0, 0) = 0
[pid 721] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 721] write(3, "1000", 4) = 4
[pid 721] close(3) = 0
[pid 721] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 721] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 721] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 721] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 722 attached
<unfinished ...>
[pid 722] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 722] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 721] <... clone resumed>, parent_tid=[722], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 722
[pid 721] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 722] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 721] <... futex resumed>) = 0
[pid 722] mkdir("./file0", 000 <unfinished ...>
[pid 721] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 722] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 722] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 722] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 721] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 721] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 722] <... futex resumed>) = 0
[pid 721] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 722] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 722] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 722] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 721] <... futex resumed>) = 0
[pid 721] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 722] <... futex resumed>) = 0
[pid 721] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 722] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 722] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 721] <... futex resumed>) = 0
[pid 722] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 721] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 721] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 721] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 721] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 721] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 722] <... umount2 resumed>) = 0
[pid 722] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 721] <... clone resumed>, parent_tid=[723], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 723
[pid 722] <... futex resumed>) = 0
[pid 721] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 722] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 721] <... futex resumed>) = 0
./strace-static-x86_64: Process 723 attached
[pid 721] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 723] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 723] umount2("./file0", MNT_DETACH) = 0
[pid 723] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 723] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 721] <... futex resumed>) = 0
[pid 721] exit_group(0) = ?
[pid 722] <... futex resumed>) = ?
[pid 723] <... futex resumed>) = ?
[pid 722] +++ exited with 0 +++
[pid 723] +++ exited with 0 +++
[pid 721] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=721, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 724
./strace-static-x86_64: Process 724 attached
[pid 724] set_robust_list(0x5555560865e0, 24) = 0
[pid 724] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 724] setpgid(0, 0) = 0
[pid 724] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 724] write(3, "1000", 4) = 4
[pid 724] close(3) = 0
[pid 724] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 724] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 724] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 724] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 725 attached
, parent_tid=[725], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 725
[pid 725] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 725] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 724] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 725] <... futex resumed>) = 0
[pid 725] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 725] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 725] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 724] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 724] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 725] <... futex resumed>) = 0
[pid 725] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 724] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 725] <... mount resumed>) = 0
[pid 725] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 725] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 724] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 724] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 725] <... futex resumed>) = 0
[pid 725] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 724] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 725] <... mount resumed>) = 0
[pid 725] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 725] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 724] <... futex resumed>) = 0
[pid 724] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 725] <... futex resumed>) = 0
[pid 724] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 725] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 724] <... futex resumed>) = 0
[pid 724] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 725] <... umount2 resumed>) = 0
[pid 724] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 725] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 724] <... mprotect resumed>) = 0
[pid 724] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 725] <... futex resumed>) = 0
./strace-static-x86_64: Process 726 attached
[pid 725] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 724] <... clone resumed>, parent_tid=[726], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 726
[pid 724] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 724] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 726] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 726] umount2("./file0", MNT_DETACH) = 0
[pid 726] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 724] <... futex resumed>) = 0
[pid 724] exit_group(0 <unfinished ...>
[pid 725] <... futex resumed>) = ?
[pid 724] <... exit_group resumed>) = ?
[pid 725] +++ exited with 0 +++
[pid 726] +++ exited with 0 +++
[pid 724] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=724, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 727
./strace-static-x86_64: Process 727 attached
[pid 727] set_robust_list(0x5555560865e0, 24) = 0
[pid 727] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 727] setpgid(0, 0) = 0
[pid 727] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 727] write(3, "1000", 4) = 4
[pid 727] close(3) = 0
[pid 727] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 727] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 727] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 727] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 728 attached
, parent_tid=[728], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 728
[pid 727] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 728] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 727] <... futex resumed>) = 0
[pid 728] <... set_robust_list resumed>) = 0
[pid 727] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 728] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 728] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 727] <... futex resumed>) = 0
[pid 728] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 727] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 727] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 728] <... mount resumed>) = 0
[pid 728] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 727] <... futex resumed>) = 0
[pid 727] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 727] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 728] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 728] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 727] <... futex resumed>) = 0
[pid 727] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 727] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 727] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 728] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 727] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 727] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[729], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 729
[pid 727] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 727] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 728] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 729 attached
[pid 729] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 729] umount2("./file0", MNT_DETACH) = 0
[pid 729] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 727] <... futex resumed>) = 0
[pid 729] <... futex resumed>) = 1
[pid 729] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 728] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 728] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 727] exit_group(0) = ?
[pid 729] <... futex resumed>) = ?
[pid 728] <... futex resumed>) = ?
[pid 729] +++ exited with 0 +++
[pid 728] +++ exited with 0 +++
[pid 727] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=727, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 730
./strace-static-x86_64: Process 730 attached
[pid 730] set_robust_list(0x5555560865e0, 24) = 0
[pid 730] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 730] setpgid(0, 0) = 0
[pid 730] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 730] write(3, "1000", 4) = 4
[pid 730] close(3) = 0
[pid 730] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 730] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 730] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 730] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[731], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 731
[pid 730] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 730] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 731 attached
<unfinished ...>
[pid 731] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 731] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 731] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 730] <... futex resumed>) = 0
[pid 730] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 730] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 731] <... futex resumed>) = 1
[pid 731] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 731] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 730] <... futex resumed>) = 0
[pid 730] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 730] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 731] <... futex resumed>) = 1
[pid 731] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 731] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 730] <... futex resumed>) = 0
[pid 731] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 730] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 730] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 730] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 730] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 731] <... umount2 resumed>) = 0
[pid 730] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 731] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 732 attached
) = 0
[pid 730] <... clone resumed>, parent_tid=[732], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 732
[pid 732] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 730] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 731] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 730] <... futex resumed>) = 0
[pid 732] <... set_robust_list resumed>) = 0
[pid 730] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 732] umount2("./file0", MNT_DETACH) = 0
[pid 732] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 730] <... futex resumed>) = 0
[pid 732] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 730] exit_group(0) = ?
[pid 731] <... futex resumed>) = ?
[pid 731] +++ exited with 0 +++
[pid 732] <... futex resumed>) = ?
[pid 732] +++ exited with 0 +++
[pid 730] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=730, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 733
./strace-static-x86_64: Process 733 attached
[pid 733] set_robust_list(0x5555560865e0, 24) = 0
[pid 733] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 733] setpgid(0, 0) = 0
[pid 733] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 733] write(3, "1000", 4) = 4
[pid 733] close(3) = 0
[pid 733] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 733] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 733] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 733] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[734], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 734
[pid 733] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 733] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 734 attached
<unfinished ...>
[pid 734] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 734] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 734] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 733] <... futex resumed>) = 0
[pid 733] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 733] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 734] <... futex resumed>) = 1
[pid 734] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 734] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 733] <... futex resumed>) = 0
[pid 733] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 733] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 734] <... futex resumed>) = 1
[pid 734] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 734] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 733] <... futex resumed>) = 0
[pid 733] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 733] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 733] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 733] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 734] <... futex resumed>) = 1
[pid 733] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 734] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 735 attached
<unfinished ...>
[pid 733] <... clone resumed>, parent_tid=[735], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 735
[pid 733] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 733] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 734] <... umount2 resumed>) = 0
[pid 735] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 734] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 735] <... set_robust_list resumed>) = 0
[pid 734] <... futex resumed>) = 0
[pid 735] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 734] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 735] <... umount2 resumed>) = 0
[pid 735] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 733] <... futex resumed>) = 0
[pid 735] <... futex resumed>) = 1
[pid 733] exit_group(0 <unfinished ...>
[pid 735] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 733] <... exit_group resumed>) = ?
[pid 734] <... futex resumed>) = -1 (errno 18446744073709551414)
[pid 735] <... futex resumed>) = ?
[pid 734] +++ exited with 0 +++
[pid 735] +++ exited with 0 +++
[pid 733] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=733, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 736
./strace-static-x86_64: Process 736 attached
[pid 736] set_robust_list(0x5555560865e0, 24) = 0
[pid 736] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 736] setpgid(0, 0) = 0
[pid 736] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 736] write(3, "1000", 4) = 4
[pid 736] close(3) = 0
[pid 736] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 736] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 736] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 736] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 737 attached
<unfinished ...>
[pid 737] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 737] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 736] <... clone resumed>, parent_tid=[737], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 737
[pid 736] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 737] <... futex resumed>) = 0
[pid 737] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 737] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 737] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 736] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 736] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 737] <... futex resumed>) = 0
[pid 737] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 736] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 737] <... mount resumed>) = 0
[pid 737] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 737] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 736] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 736] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 737] <... futex resumed>) = 0
[pid 737] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 736] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 737] <... mount resumed>) = 0
[pid 737] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 737] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 736] <... futex resumed>) = 0
[pid 736] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 737] <... futex resumed>) = 0
[pid 736] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 737] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 736] <... futex resumed>) = 0
[pid 736] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 737] <... umount2 resumed>) = 0
[pid 736] <... mmap resumed>) = 0x7f236e446000
[pid 736] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 737] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 736] <... mprotect resumed>) = 0
[pid 737] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 736] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 738 attached
, parent_tid=[738], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 738
[pid 738] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 736] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 738] <... set_robust_list resumed>) = 0
[pid 736] <... futex resumed>) = 0
[pid 738] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 736] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 738] <... umount2 resumed>) = 0
[pid 738] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 736] <... futex resumed>) = 0
[pid 738] <... futex resumed>) = 1
[pid 736] exit_group(0 <unfinished ...>
[pid 738] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL) = ?
[pid 737] <... futex resumed>) = ?
[pid 736] <... exit_group resumed>) = ?
[pid 737] +++ exited with 0 +++
[pid 738] +++ exited with 0 +++
[pid 736] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=736, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 739
./strace-static-x86_64: Process 739 attached
[pid 739] set_robust_list(0x5555560865e0, 24) = 0
[pid 739] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 739] setpgid(0, 0) = 0
[pid 739] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 739] write(3, "1000", 4) = 4
[pid 739] close(3) = 0
[pid 739] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 739] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 739] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 739] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 740 attached
, parent_tid=[740], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 740
[pid 740] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 740] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 739] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 740] <... futex resumed>) = 0
[pid 739] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 740] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 740] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 740] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 739] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 739] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 740] <... futex resumed>) = 0
[pid 739] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 740] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 740] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 740] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 739] <... futex resumed>) = 0
[pid 739] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 740] <... futex resumed>) = 0
[pid 739] <... futex resumed>) = 1
[pid 740] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 739] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 740] <... mount resumed>) = 0
[pid 740] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 739] <... futex resumed>) = 0
[pid 740] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 739] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 739] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 739] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 739] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 740] <... umount2 resumed>) = 0
[pid 739] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 740] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 740] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 741 attached
<unfinished ...>
[pid 741] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 739] <... clone resumed>, parent_tid=[741], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 741
[pid 741] <... set_robust_list resumed>) = 0
[pid 739] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 741] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 739] <... futex resumed>) = 0
[pid 739] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 741] <... umount2 resumed>) = 0
[pid 741] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 739] <... futex resumed>) = 0
[pid 741] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 739] exit_group(0) = ?
[pid 740] <... futex resumed>) = ?
[pid 740] +++ exited with 0 +++
[pid 741] <... futex resumed>) = ?
[pid 741] +++ exited with 0 +++
[pid 739] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=739, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 742
./strace-static-x86_64: Process 742 attached
[pid 742] set_robust_list(0x5555560865e0, 24) = 0
[pid 742] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 742] setpgid(0, 0) = 0
[pid 742] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 742] write(3, "1000", 4) = 4
[pid 742] close(3) = 0
[pid 742] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 742] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 742] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 742] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[743], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 743
[pid 742] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 742] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 743 attached
<unfinished ...>
[pid 743] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 743] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 743] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 742] <... futex resumed>) = 0
[pid 742] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 742] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 743] <... futex resumed>) = 1
[pid 743] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 743] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 742] <... futex resumed>) = 0
[pid 742] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 742] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 743] <... futex resumed>) = 1
[pid 743] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 743] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 742] <... futex resumed>) = 0
[pid 742] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 742] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 742] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 742] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 742] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[744], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 744
[pid 742] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 742] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 743] <... futex resumed>) = 1
[pid 743] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 744 attached
) = 0
[pid 744] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 743] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 744] <... set_robust_list resumed>) = 0
[pid 743] <... futex resumed>) = 0
[pid 744] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 743] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 744] <... umount2 resumed>) = 0
[pid 744] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 742] <... futex resumed>) = 0
[pid 742] exit_group(0) = ?
[pid 743] <... futex resumed>) = ?
[pid 744] +++ exited with 0 +++
[pid 743] +++ exited with 0 +++
[pid 742] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=742, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 745
./strace-static-x86_64: Process 745 attached
[pid 745] set_robust_list(0x5555560865e0, 24) = 0
[pid 745] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 745] setpgid(0, 0) = 0
[pid 745] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 745] write(3, "1000", 4) = 4
[pid 745] close(3) = 0
[pid 745] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 745] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 745] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 745] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 746 attached
<unfinished ...>
[pid 746] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 746] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 745] <... clone resumed>, parent_tid=[746], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 746
[pid 745] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 746] <... futex resumed>) = 0
[pid 745] <... futex resumed>) = 1
[pid 746] mkdir("./file0", 000 <unfinished ...>
[pid 745] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 746] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 746] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 746] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 745] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 745] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 746] <... futex resumed>) = 0
[pid 745] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 746] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 746] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 745] <... futex resumed>) = 0
[pid 745] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 745] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 746] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 746] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 746] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 745] <... futex resumed>) = 0
[pid 745] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 745] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 746] <... futex resumed>) = 0
[pid 746] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 745] <... futex resumed>) = 0
[pid 745] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 745] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 746] <... umount2 resumed>) = 0
[pid 745] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[747], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 747
[pid 745] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 745] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 747 attached
<unfinished ...>
[pid 747] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 747] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 746] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 746] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 747] <... umount2 resumed>) = 0
[pid 747] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 745] <... futex resumed>) = 0
[pid 745] exit_group(0) = ?
[pid 746] <... futex resumed>) = ?
[pid 746] +++ exited with 0 +++
[pid 747] <... futex resumed>) = ?
[pid 747] +++ exited with 0 +++
[pid 745] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=745, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 748
./strace-static-x86_64: Process 748 attached
[pid 748] set_robust_list(0x5555560865e0, 24) = 0
[pid 748] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 748] setpgid(0, 0) = 0
[pid 748] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 748] write(3, "1000", 4) = 4
[pid 748] close(3) = 0
[pid 748] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 748] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 748] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 748] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 749 attached
, parent_tid=[749], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 749
[pid 749] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 748] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 749] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 749] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 749] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 748] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 748] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 749] <... futex resumed>) = 0
[pid 748] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 749] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 749] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 749] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 748] <... futex resumed>) = 0
[pid 748] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 748] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 749] <... futex resumed>) = 0
[pid 749] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 749] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 748] <... futex resumed>) = 0
[pid 749] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 748] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 748] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 748] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 749] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 749] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 748] <... mmap resumed>) = 0x7f236e446000
[pid 748] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 748] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[750], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 750
[pid 748] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 748] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 749] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 750 attached
[pid 750] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 750] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 749] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 749] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 750] <... umount2 resumed>) = 0
[pid 750] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 748] <... futex resumed>) = 0
[pid 748] exit_group(0) = ?
[pid 749] <... futex resumed>) = ?
[pid 750] <... futex resumed>) = ?
[pid 749] +++ exited with 0 +++
[pid 750] +++ exited with 0 +++
[pid 748] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=748, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 751
./strace-static-x86_64: Process 751 attached
[pid 751] set_robust_list(0x5555560865e0, 24) = 0
[pid 751] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 751] setpgid(0, 0) = 0
[pid 751] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 751] write(3, "1000", 4) = 4
[pid 751] close(3) = 0
[pid 751] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 751] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 751] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 751] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 752 attached
, parent_tid=[752], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 752
[pid 752] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 751] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 752] <... set_robust_list resumed>) = 0
[pid 751] <... futex resumed>) = 0
[pid 751] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 752] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 752] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 751] <... futex resumed>) = 0
[pid 751] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 751] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 752] <... futex resumed>) = 1
[pid 752] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 752] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 751] <... futex resumed>) = 0
[pid 751] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 751] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 752] <... futex resumed>) = 1
[pid 752] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 752] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 751] <... futex resumed>) = 0
[pid 752] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 751] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 751] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 751] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 751] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 751] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 753 attached
<unfinished ...>
[pid 752] <... umount2 resumed>) = 0
[pid 751] <... clone resumed>, parent_tid=[753], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 753
[pid 753] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 752] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 751] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 753] <... set_robust_list resumed>) = 0
[pid 753] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 752] <... futex resumed>) = 0
[pid 751] <... futex resumed>) = 0
[pid 751] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 752] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 753] <... umount2 resumed>) = 0
[pid 753] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 751] <... futex resumed>) = 0
[pid 751] exit_group(0) = ?
[pid 753] +++ exited with 0 +++
[pid 752] <... futex resumed>) = ?
[pid 752] +++ exited with 0 +++
[pid 751] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=751, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 754
./strace-static-x86_64: Process 754 attached
[pid 754] set_robust_list(0x5555560865e0, 24) = 0
[pid 754] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 754] setpgid(0, 0) = 0
[pid 754] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 754] write(3, "1000", 4) = 4
[pid 754] close(3) = 0
[pid 754] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 754] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 754] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 754] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 755 attached
<unfinished ...>
[pid 755] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 755] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 754] <... clone resumed>, parent_tid=[755], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 755
[pid 754] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 755] <... futex resumed>) = 0
[pid 754] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 755] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 755] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 755] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 754] <... futex resumed>) = 0
[pid 754] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 755] <... futex resumed>) = 0
[pid 755] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 754] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 755] <... mount resumed>) = 0
[pid 755] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 755] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 754] <... futex resumed>) = 0
[pid 754] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 755] <... futex resumed>) = 0
[pid 755] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 754] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 755] <... mount resumed>) = 0
[pid 755] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 754] <... futex resumed>) = 0
[pid 755] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 754] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 754] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 754] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 754] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 754] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 755] <... umount2 resumed>) = 0
[pid 755] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 754] <... clone resumed>, parent_tid=[756], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 756
[pid 755] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 754] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 756 attached
) = 0
[pid 756] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 756] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 754] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 756] <... umount2 resumed>) = 0
[pid 756] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 754] <... futex resumed>) = 0
[pid 756] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 754] exit_group(0) = ?
[pid 755] <... futex resumed>) = ?
[pid 755] +++ exited with 0 +++
[pid 756] <... futex resumed>) = ?
[pid 756] +++ exited with 0 +++
[pid 754] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=754, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 757
./strace-static-x86_64: Process 757 attached
[pid 757] set_robust_list(0x5555560865e0, 24) = 0
[pid 757] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 757] setpgid(0, 0) = 0
[pid 757] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 757] write(3, "1000", 4) = 4
[pid 757] close(3) = 0
[pid 757] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 757] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 757] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 757] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 758 attached
, parent_tid=[758], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 758
[pid 758] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 757] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 758] <... set_robust_list resumed>) = 0
[pid 757] <... futex resumed>) = 0
[pid 757] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 758] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 758] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 757] <... futex resumed>) = 0
[pid 758] <... futex resumed>) = 1
[pid 757] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 758] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 757] <... futex resumed>) = 0
[pid 757] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 758] <... mount resumed>) = 0
[pid 758] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 757] <... futex resumed>) = 0
[pid 758] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 757] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 757] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 758] <... mount resumed>) = 0
[pid 758] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 757] <... futex resumed>) = 0
[pid 758] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 757] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 757] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 757] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 757] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 758] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 757] <... mprotect resumed>) = 0
[pid 758] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 757] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 758] <... umount2 resumed>) = 0
[pid 757] <... clone resumed>, parent_tid=[759], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 759
[pid 757] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 757] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 759 attached
<unfinished ...>
[pid 758] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 759] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 758] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 759] umount2("./file0", MNT_DETACH) = 0
[pid 759] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 757] <... futex resumed>) = 0
[pid 759] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 757] exit_group(0) = ?
[pid 758] <... futex resumed>) = ?
[pid 758] +++ exited with 0 +++
[pid 759] <... futex resumed>) = ?
[pid 759] +++ exited with 0 +++
[pid 757] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=757, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 760
./strace-static-x86_64: Process 760 attached
[pid 760] set_robust_list(0x5555560865e0, 24) = 0
[pid 760] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 760] setpgid(0, 0) = 0
[pid 760] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 760] write(3, "1000", 4) = 4
[pid 760] close(3) = 0
[pid 760] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 760] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 760] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 760] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 761 attached
<unfinished ...>
[pid 761] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 761] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 760] <... clone resumed>, parent_tid=[761], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 761
[pid 760] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 761] <... futex resumed>) = 0
[pid 760] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 761] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 761] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 761] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 760] <... futex resumed>) = 0
[pid 760] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 761] <... futex resumed>) = 0
[pid 760] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 761] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 761] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 761] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 760] <... futex resumed>) = 0
[pid 760] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 761] <... futex resumed>) = 0
[pid 761] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 760] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 761] <... mount resumed>) = 0
[pid 761] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 761] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 760] <... futex resumed>) = 0
[pid 760] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 761] <... futex resumed>) = 0
[pid 761] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 760] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 760] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 761] <... umount2 resumed>) = 0
[pid 761] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 761] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 760] <... mmap resumed>) = 0x7f236e446000
[pid 760] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 760] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 762 attached
<unfinished ...>
[pid 762] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 762] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 760] <... clone resumed>, parent_tid=[762], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 762
[pid 760] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 762] <... futex resumed>) = 0
[pid 760] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 762] umount2("./file0", MNT_DETACH) = 0
[pid 762] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 762] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 760] <... futex resumed>) = 0
[pid 760] exit_group(0) = ?
[pid 761] <... futex resumed>) = ?
[pid 761] +++ exited with 0 +++
[pid 762] <... futex resumed>) = ?
[pid 762] +++ exited with 0 +++
[pid 760] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=760, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 763
./strace-static-x86_64: Process 763 attached
[pid 763] set_robust_list(0x5555560865e0, 24) = 0
[pid 763] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 763] setpgid(0, 0) = 0
[pid 763] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 763] write(3, "1000", 4) = 4
[pid 763] close(3) = 0
[pid 763] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 763] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 763] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 763] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 764 attached
, parent_tid=[764], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 764
[pid 764] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 764] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 763] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 764] <... futex resumed>) = 0
[pid 764] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 764] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 764] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 763] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 763] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 764] <... futex resumed>) = 0
[pid 763] <... futex resumed>) = 1
[pid 764] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 763] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 764] <... mount resumed>) = 0
[pid 764] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 764] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 763] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 763] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 764] <... futex resumed>) = 0
[pid 764] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 763] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 764] <... mount resumed>) = 0
[pid 764] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 764] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 763] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 763] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 764] <... futex resumed>) = 0
[pid 764] umount2("./file0", MNT_DETACH) = 0
[pid 764] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 764] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 763] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 764] <... futex resumed>) = 0
[pid 764] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 763] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 764] <... umount2 resumed>) = 0
[pid 764] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 764] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 763] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 763] exit_group(0) = ?
[pid 764] <... futex resumed>) = ?
[pid 764] +++ exited with 0 +++
[pid 763] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=763, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 765
./strace-static-x86_64: Process 765 attached
[pid 765] set_robust_list(0x5555560865e0, 24) = 0
[pid 765] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 765] setpgid(0, 0) = 0
[pid 765] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 765] write(3, "1000", 4) = 4
[pid 765] close(3) = 0
[pid 765] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 765] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 765] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 765] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 766 attached
, parent_tid=[766], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 766
[pid 766] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 765] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 766] <... set_robust_list resumed>) = 0
[pid 765] <... futex resumed>) = 0
[pid 765] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 766] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 766] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 765] <... futex resumed>) = 0
[pid 766] <... futex resumed>) = 1
[pid 765] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 766] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 765] <... futex resumed>) = 0
[pid 765] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 766] <... mount resumed>) = 0
[pid 766] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 765] <... futex resumed>) = 0
[pid 765] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 766] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 765] <... futex resumed>) = 0
[pid 765] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 766] <... mount resumed>) = 0
[pid 766] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 765] <... futex resumed>) = 0
[pid 766] <... futex resumed>) = 1
[pid 765] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 766] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 765] <... futex resumed>) = 0
[pid 765] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 765] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 765] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 765] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 766] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 767 attached
[pid 766] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 765] <... clone resumed>, parent_tid=[767], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 767
[pid 767] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 766] <... futex resumed>) = 0
[pid 765] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 767] <... set_robust_list resumed>) = 0
[pid 766] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 765] <... futex resumed>) = 0
[pid 767] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 765] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 767] <... umount2 resumed>) = 0
[pid 767] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 765] <... futex resumed>) = 0
[pid 767] <... futex resumed>) = 1
[pid 765] exit_group(0 <unfinished ...>
[pid 767] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 765] <... exit_group resumed>) = ?
[pid 766] <... futex resumed>) = ?
[pid 767] <... futex resumed>) = ?
[pid 766] +++ exited with 0 +++
[pid 767] +++ exited with 0 +++
[pid 765] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=765, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 768 attached
, child_tidptr=0x5555560865d0) = 768
[pid 768] set_robust_list(0x5555560865e0, 24) = 0
[pid 768] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 768] setpgid(0, 0) = 0
[pid 768] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 768] write(3, "1000", 4) = 4
[pid 768] close(3) = 0
[pid 768] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 768] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 768] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 768] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 769 attached
, parent_tid=[769], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 769
[pid 768] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 768] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 769] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 769] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 769] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 768] <... futex resumed>) = 0
[pid 768] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 768] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 769] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 769] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 768] <... futex resumed>) = 0
[pid 769] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 768] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 768] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 769] <... mount resumed>) = 0
[pid 769] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 769] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 768] <... futex resumed>) = 0
[pid 768] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 768] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 768] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 768] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 769] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 768] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 769] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 768] <... clone resumed>, parent_tid=[770], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 770
[pid 768] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 768] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 770 attached
<unfinished ...>
[pid 770] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 770] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 769] <... umount2 resumed>) = 0
[pid 769] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 770] <... umount2 resumed>) = 0
[pid 769] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 770] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 768] <... futex resumed>) = 0
[pid 768] exit_group(0) = ?
[pid 769] <... futex resumed>) = ?
[pid 770] <... futex resumed>) = ?
[pid 770] +++ exited with 0 +++
[pid 769] +++ exited with 0 +++
[pid 768] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=768, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 771
./strace-static-x86_64: Process 771 attached
[pid 771] set_robust_list(0x5555560865e0, 24) = 0
[pid 771] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 771] setpgid(0, 0) = 0
[pid 771] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 771] write(3, "1000", 4) = 4
[pid 771] close(3) = 0
[pid 771] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 771] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 771] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 771] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 772 attached
, parent_tid=[772], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 772
[pid 772] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 771] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 772] <... set_robust_list resumed>) = 0
[pid 771] <... futex resumed>) = 0
[pid 771] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 772] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 772] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 771] <... futex resumed>) = 0
[pid 772] <... futex resumed>) = 1
[pid 771] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 772] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 771] <... futex resumed>) = 0
[pid 771] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 772] <... mount resumed>) = 0
[pid 772] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 771] <... futex resumed>) = 0
[pid 771] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 771] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 772] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 772] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 771] <... futex resumed>) = 0
[pid 771] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 771] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 771] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 771] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 771] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[773], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 773
[pid 771] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 772] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 771] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 773 attached
<unfinished ...>
[pid 773] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 773] umount2("./file0", MNT_DETACH) = 0
[pid 772] <... umount2 resumed>) = 0
[pid 773] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 771] <... futex resumed>) = 0
[pid 773] <... futex resumed>) = 1
[pid 773] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 772] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 772] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 771] exit_group(0) = ?
[pid 773] <... futex resumed>) = ?
[pid 772] <... futex resumed>) = ?
[pid 773] +++ exited with 0 +++
[pid 772] +++ exited with 0 +++
[pid 771] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=771, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 774
./strace-static-x86_64: Process 774 attached
[pid 774] set_robust_list(0x5555560865e0, 24) = 0
[pid 774] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 774] setpgid(0, 0) = 0
[pid 774] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 774] write(3, "1000", 4) = 4
[pid 774] close(3) = 0
[pid 774] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 774] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 774] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 774] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[775], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 775
[pid 774] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 774] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 775 attached
<unfinished ...>
[pid 775] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 775] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 775] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 774] <... futex resumed>) = 0
[pid 774] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 774] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 775] <... futex resumed>) = 1
[pid 775] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 775] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 774] <... futex resumed>) = 0
[pid 774] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 774] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 775] <... futex resumed>) = 1
[pid 775] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 775] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 774] <... futex resumed>) = 0
[pid 775] <... futex resumed>) = 1
[pid 774] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 775] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 774] <... futex resumed>) = 0
[pid 774] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 774] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 774] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 774] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[776], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 776
[pid 774] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 775] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 776 attached
[pid 774] <... futex resumed>) = 0
[pid 776] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 775] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 776] <... set_robust_list resumed>) = 0
[pid 774] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 775] <... futex resumed>) = 0
[pid 776] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 775] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 776] <... umount2 resumed>) = 0
[pid 776] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 774] <... futex resumed>) = 0
[pid 776] <... futex resumed>) = 1
[pid 776] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 774] exit_group(0) = ?
[pid 775] <... futex resumed>) = ?
[pid 776] <... futex resumed>) = ?
[pid 775] +++ exited with 0 +++
[pid 776] +++ exited with 0 +++
[pid 774] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=774, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 777
./strace-static-x86_64: Process 777 attached
[pid 777] set_robust_list(0x5555560865e0, 24) = 0
[pid 777] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 777] setpgid(0, 0) = 0
[pid 777] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 777] write(3, "1000", 4) = 4
[pid 777] close(3) = 0
[pid 777] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 777] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 777] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 777] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 778 attached
, parent_tid=[778], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 778
[pid 778] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 778] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 777] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 778] <... futex resumed>) = 0
[pid 778] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 777] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 778] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 778] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 777] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 777] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 778] <... futex resumed>) = 0
[pid 778] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 777] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 778] <... mount resumed>) = 0
[pid 778] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 777] <... futex resumed>) = 0
[pid 777] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 777] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 778] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 778] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 777] <... futex resumed>) = 0
[pid 777] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 777] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 777] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 777] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 778] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 777] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 778] <... umount2 resumed>) = 0
[pid 778] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 777] <... clone resumed>, parent_tid=[779], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 779
[pid 778] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 777] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 777] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 779 attached
<unfinished ...>
[pid 779] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 779] umount2("./file0", MNT_DETACH) = 0
[pid 779] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 777] <... futex resumed>) = 0
[pid 777] exit_group(0) = ?
[pid 778] <... futex resumed>) = ?
[pid 778] +++ exited with 0 +++
[pid 779] +++ exited with 0 +++
[pid 777] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=777, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 780
./strace-static-x86_64: Process 780 attached
[pid 780] set_robust_list(0x5555560865e0, 24) = 0
[pid 780] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 780] setpgid(0, 0) = 0
[pid 780] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 780] write(3, "1000", 4) = 4
[pid 780] close(3) = 0
[pid 780] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 780] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 780] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 780] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[781], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 781
[pid 780] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 780] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 781 attached
<unfinished ...>
[pid 781] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 781] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 781] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 780] <... futex resumed>) = 0
[pid 780] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 780] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 781] <... futex resumed>) = 1
[pid 781] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 781] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 780] <... futex resumed>) = 0
[pid 781] <... futex resumed>) = 1
[pid 780] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 781] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 780] <... futex resumed>) = 0
[pid 780] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 781] <... mount resumed>) = 0
[pid 781] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 780] <... futex resumed>) = 0
[pid 780] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 781] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 780] <... futex resumed>) = 0
[pid 780] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 780] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 780] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 781] <... umount2 resumed>) = 0
[pid 780] <... mprotect resumed>) = 0
[pid 781] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 780] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 781] <... futex resumed>) = 0
[pid 781] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 782 attached
<unfinished ...>
[pid 780] <... clone resumed>, parent_tid=[782], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 782
[pid 782] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 780] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 782] <... set_robust_list resumed>) = 0
[pid 780] <... futex resumed>) = 0
[pid 782] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 780] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 782] <... umount2 resumed>) = 0
[pid 782] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 780] <... futex resumed>) = 0
[pid 782] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 780] exit_group(0) = ?
[pid 781] <... futex resumed>) = 231
[pid 781] +++ exited with 0 +++
[pid 782] <... futex resumed>) = ?
[pid 782] +++ exited with 0 +++
[pid 780] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=780, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 783
./strace-static-x86_64: Process 783 attached
[pid 783] set_robust_list(0x5555560865e0, 24) = 0
[pid 783] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 783] setpgid(0, 0) = 0
[pid 783] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 783] write(3, "1000", 4) = 4
[pid 783] close(3) = 0
[pid 783] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 783] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 783] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 783] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 784 attached
<unfinished ...>
[pid 784] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 784] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 783] <... clone resumed>, parent_tid=[784], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 784
[pid 783] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 784] <... futex resumed>) = 0
[pid 784] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 784] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 784] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 783] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 783] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 784] <... futex resumed>) = 0
[pid 784] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 783] <... futex resumed>) = 1
[pid 783] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 784] <... mount resumed>) = 0
[pid 784] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 784] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 783] <... futex resumed>) = 0
[pid 783] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 784] <... futex resumed>) = 0
[pid 784] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 783] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 784] <... mount resumed>) = 0
[pid 784] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 783] <... futex resumed>) = 0
[pid 784] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 783] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 783] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 783] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 783] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 784] <... umount2 resumed>) = 0
[pid 783] <... mprotect resumed>) = 0
[pid 784] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 783] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 784] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 785 attached
<unfinished ...>
[pid 783] <... clone resumed>, parent_tid=[785], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 785
[pid 785] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 783] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 785] <... set_robust_list resumed>) = 0
[pid 783] <... futex resumed>) = 0
[pid 785] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 783] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 785] <... umount2 resumed>) = 0
[pid 785] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 783] <... futex resumed>) = 0
[pid 785] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 783] exit_group(0) = ?
[pid 784] <... futex resumed>) = ?
[pid 784] +++ exited with 0 +++
[pid 785] <... futex resumed>) = ?
[pid 785] +++ exited with 0 +++
[pid 783] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=783, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 786 attached
, child_tidptr=0x5555560865d0) = 786
[pid 786] set_robust_list(0x5555560865e0, 24) = 0
[pid 786] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 786] setpgid(0, 0) = 0
[pid 786] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 786] write(3, "1000", 4) = 4
[pid 786] close(3) = 0
[pid 786] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 786] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 786] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 786] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 787 attached
<unfinished ...>
[pid 787] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 787] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 786] <... clone resumed>, parent_tid=[787], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 787
[pid 786] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 787] <... futex resumed>) = 0
[pid 787] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 787] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 787] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 786] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 786] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 787] <... futex resumed>) = 0
[pid 787] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 787] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 787] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 786] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 786] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 787] <... futex resumed>) = 0
[pid 787] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 786] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 787] <... mount resumed>) = 0
[pid 787] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 787] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 786] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 786] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 787] <... futex resumed>) = 0
[pid 787] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 786] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 787] <... umount2 resumed>) = 0
[pid 787] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 787] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 786] <... futex resumed>) = 0
[pid 786] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 786] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 786] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[788], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 788
./strace-static-x86_64: Process 788 attached
[pid 788] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 788] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 786] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 788] <... futex resumed>) = 0
[pid 788] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 786] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 788] <... umount2 resumed>) = 0
[pid 788] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 788] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 786] <... futex resumed>) = 0
[pid 786] exit_group(0 <unfinished ...>
[pid 787] <... futex resumed>) = ?
[pid 786] <... exit_group resumed>) = ?
[pid 787] +++ exited with 0 +++
[pid 788] <... futex resumed>) = ?
[pid 788] +++ exited with 0 +++
[pid 786] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=786, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 789
./strace-static-x86_64: Process 789 attached
[pid 789] set_robust_list(0x5555560865e0, 24) = 0
[pid 789] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 789] setpgid(0, 0) = 0
[pid 789] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 789] write(3, "1000", 4) = 4
[pid 789] close(3) = 0
[pid 789] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 789] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 789] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 789] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 790 attached
<unfinished ...>
[pid 790] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 789] <... clone resumed>, parent_tid=[790], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 790
[pid 790] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 789] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 789] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 790] <... futex resumed>) = 0
[pid 790] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 790] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 789] <... futex resumed>) = 0
[pid 789] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 789] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 790] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 790] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 789] <... futex resumed>) = 0
[pid 789] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 789] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 790] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 790] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 789] <... futex resumed>) = 0
[pid 789] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 789] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 789] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 789] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 789] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 790] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 791 attached
<unfinished ...>
[pid 791] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 789] <... clone resumed>, parent_tid=[791], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 791
[pid 790] <... umount2 resumed>) = 0
[pid 789] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 791] umount2("./file0", MNT_DETACH) = 0
[pid 790] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 789] <... futex resumed>) = 0
[pid 791] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 791] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 790] <... futex resumed>) = 0
[pid 789] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 790] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 789] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 789] exit_group(0) = ?
[pid 791] <... futex resumed>) = ?
[pid 790] <... futex resumed>) = ?
[pid 791] +++ exited with 0 +++
[pid 790] +++ exited with 0 +++
[pid 789] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=789, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 792
./strace-static-x86_64: Process 792 attached
[pid 792] set_robust_list(0x5555560865e0, 24) = 0
[pid 792] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 792] setpgid(0, 0) = 0
[pid 792] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 792] write(3, "1000", 4) = 4
[pid 792] close(3) = 0
[pid 792] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 792] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 792] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 792] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 793 attached
, parent_tid=[793], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 793
[pid 793] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 793] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 792] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 793] <... futex resumed>) = 0
[pid 793] mkdir("./file0", 000 <unfinished ...>
[pid 792] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 793] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 793] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 793] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 792] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 792] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 793] <... futex resumed>) = 0
[pid 792] <... futex resumed>) = 1
[pid 793] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 792] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 793] <... mount resumed>) = 0
[pid 793] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 792] <... futex resumed>) = 0
[pid 793] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 792] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 792] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 793] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 793] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 793] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 792] <... futex resumed>) = 0
[pid 792] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 792] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 792] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 792] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 792] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[794], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 794
[pid 793] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 792] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 792] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 794 attached
<unfinished ...>
[pid 794] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 794] umount2("./file0", MNT_DETACH) = 0
[pid 793] <... umount2 resumed>) = 0
[pid 794] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 792] <... futex resumed>) = 0
[pid 794] <... futex resumed>) = 1
[pid 793] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 794] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 793] <... futex resumed>) = 0
[pid 793] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 792] exit_group(0) = ?
[pid 794] <... futex resumed>) = ?
[pid 794] +++ exited with 0 +++
[pid 793] <... futex resumed>) = ?
[pid 793] +++ exited with 0 +++
[pid 792] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=792, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 795
./strace-static-x86_64: Process 795 attached
[pid 795] set_robust_list(0x5555560865e0, 24) = 0
[pid 795] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 795] setpgid(0, 0) = 0
[pid 795] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 795] write(3, "1000", 4) = 4
[pid 795] close(3) = 0
[pid 795] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 795] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 795] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 795] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[796], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 796
[pid 795] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 795] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 796 attached
<unfinished ...>
[pid 796] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 796] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 796] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 795] <... futex resumed>) = 0
[pid 795] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 795] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 796] <... futex resumed>) = 1
[pid 796] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 796] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 795] <... futex resumed>) = 0
[pid 796] <... futex resumed>) = 1
[pid 795] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 796] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 795] <... futex resumed>) = 0
[pid 795] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 796] <... mount resumed>) = 0
[pid 796] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 795] <... futex resumed>) = 0
[pid 796] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 795] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 796] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 795] <... futex resumed>) = 0
[pid 796] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 795] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 795] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 795] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 795] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[797], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 797
[pid 795] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 797 attached
<unfinished ...>
[pid 796] <... umount2 resumed>) = 0
[pid 795] <... futex resumed>) = 0
[pid 797] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 796] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 797] <... set_robust_list resumed>) = 0
[pid 795] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 796] <... futex resumed>) = 0
[pid 797] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 796] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 797] <... umount2 resumed>) = 0
[pid 797] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 795] <... futex resumed>) = 0
[pid 797] <... futex resumed>) = 1
[pid 795] exit_group(0 <unfinished ...>
[pid 797] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 795] <... exit_group resumed>) = ?
[pid 796] <... futex resumed>) = ?
[pid 796] +++ exited with 0 +++
[pid 797] <... futex resumed>) = ?
[pid 797] +++ exited with 0 +++
[pid 795] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=795, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 798
./strace-static-x86_64: Process 798 attached
[pid 798] set_robust_list(0x5555560865e0, 24) = 0
[pid 798] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 798] setpgid(0, 0) = 0
[pid 798] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 798] write(3, "1000", 4) = 4
[pid 798] close(3) = 0
[pid 798] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 798] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 798] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 798] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[799], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 799
./strace-static-x86_64: Process 799 attached
[pid 798] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 799] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 799] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 798] <... futex resumed>) = 0
[pid 799] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 799] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 798] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 798] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 799] <... futex resumed>) = 0
[pid 799] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 798] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 799] <... mount resumed>) = 0
[pid 799] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 799] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 798] <... futex resumed>) = 0
[pid 798] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 799] <... futex resumed>) = 0
[pid 798] <... futex resumed>) = 1
[pid 799] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 798] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 799] <... mount resumed>) = 0
[pid 799] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 799] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 798] <... futex resumed>) = 0
[pid 798] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 798] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 798] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 798] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 799] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 798] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 799] umount2("./file0", MNT_DETACH) = 0
[pid 798] <... clone resumed>, parent_tid=[800], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 800
[pid 799] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 798] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 798] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 800 attached
<unfinished ...>
[pid 800] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 800] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 799] <... futex resumed>) = 0
[pid 799] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 800] <... umount2 resumed>) = 0
[pid 800] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 798] <... futex resumed>) = 0
[pid 798] exit_group(0) = ?
[pid 799] <... futex resumed>) = ?
[pid 799] +++ exited with 0 +++
[pid 800] +++ exited with 0 +++
[pid 798] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=798, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 801
./strace-static-x86_64: Process 801 attached
[pid 801] set_robust_list(0x5555560865e0, 24) = 0
[pid 801] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 801] setpgid(0, 0) = 0
[pid 801] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 801] write(3, "1000", 4) = 4
[pid 801] close(3) = 0
[pid 801] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 801] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 801] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 801] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 802 attached
, parent_tid=[802], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 802
[pid 802] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 802] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 801] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 802] <... futex resumed>) = 0
[pid 801] <... futex resumed>) = 1
[pid 802] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 802] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 802] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 801] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 801] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 802] <... futex resumed>) = 0
[pid 801] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 802] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 802] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 802] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 801] <... futex resumed>) = 0
[pid 801] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 802] <... futex resumed>) = 0
[pid 801] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 802] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 802] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 802] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 801] <... futex resumed>) = 0
[pid 801] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 802] <... futex resumed>) = 0
[pid 801] <... futex resumed>) = 1
[pid 802] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 801] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 801] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 801] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 801] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 802] <... umount2 resumed>) = 0
[pid 802] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 802] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 803 attached
<unfinished ...>
[pid 803] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 803] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 801] <... clone resumed>, parent_tid=[803], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 803
[pid 801] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 801] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 803] <... futex resumed>) = 0
[pid 803] umount2("./file0", MNT_DETACH) = 0
[pid 803] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 803] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 801] <... futex resumed>) = 0
[pid 801] exit_group(0) = ?
[pid 802] <... futex resumed>) = ?
[pid 802] +++ exited with 0 +++
[pid 803] <... futex resumed>) = ?
[pid 803] +++ exited with 0 +++
[pid 801] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=801, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 804
./strace-static-x86_64: Process 804 attached
[pid 804] set_robust_list(0x5555560865e0, 24) = 0
[pid 804] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 804] setpgid(0, 0) = 0
[pid 804] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 804] write(3, "1000", 4) = 4
[pid 804] close(3) = 0
[pid 804] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 804] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 804] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 804] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 805 attached
, parent_tid=[805], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 805
[pid 805] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 805] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 804] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 805] <... futex resumed>) = 0
[pid 804] <... futex resumed>) = 1
[pid 805] mkdir("./file0", 000 <unfinished ...>
[pid 804] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 805] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 805] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 804] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 804] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 805] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 804] <... futex resumed>) = 0
[pid 805] <... mount resumed>) = 0
[pid 804] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 805] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 805] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 804] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 804] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 805] <... futex resumed>) = 0
[pid 805] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 804] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 805] <... mount resumed>) = 0
[pid 805] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 804] <... futex resumed>) = 0
[pid 804] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 804] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 804] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 805] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 804] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 805] <... umount2 resumed>) = 0
[pid 804] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 805] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 806 attached
[pid 805] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 804] <... clone resumed>, parent_tid=[806], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 806
[pid 804] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 804] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 806] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 806] umount2("./file0", MNT_DETACH) = 0
[pid 806] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 804] <... futex resumed>) = 0
[pid 804] exit_group(0 <unfinished ...>
[pid 806] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 805] <... futex resumed>) = ?
[pid 806] <... futex resumed>) = ?
[pid 805] +++ exited with 0 +++
[pid 804] <... exit_group resumed>) = ?
[pid 806] +++ exited with 0 +++
[pid 804] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=804, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 807
./strace-static-x86_64: Process 807 attached
[pid 807] set_robust_list(0x5555560865e0, 24) = 0
[pid 807] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 807] setpgid(0, 0) = 0
[pid 807] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 807] write(3, "1000", 4) = 4
[pid 807] close(3) = 0
[pid 807] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 807] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 807] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 807] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[808], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 808
./strace-static-x86_64: Process 808 attached
[pid 808] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 808] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 807] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 808] <... futex resumed>) = 0
[pid 808] mkdir("./file0", 000 <unfinished ...>
[pid 807] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 808] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 808] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 808] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 807] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 807] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 808] <... futex resumed>) = 0
[pid 808] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 807] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 808] <... mount resumed>) = 0
[pid 808] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 808] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 807] <... futex resumed>) = 0
[pid 807] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 808] <... futex resumed>) = 0
[pid 808] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 807] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 808] <... mount resumed>) = 0
[pid 808] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 808] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 807] <... futex resumed>) = 0
[pid 807] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 808] <... futex resumed>) = 0
[pid 807] <... futex resumed>) = 1
[pid 808] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 807] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 807] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 808] <... umount2 resumed>) = 0
[pid 807] <... mmap resumed>) = 0x7f236e446000
[pid 808] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 808] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 807] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 807] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 809 attached
, parent_tid=[809], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 809
[pid 809] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 807] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 809] <... set_robust_list resumed>) = 0
[pid 807] <... futex resumed>) = 0
[pid 809] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 807] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 809] <... umount2 resumed>) = 0
[pid 809] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 807] <... futex resumed>) = 0
[pid 809] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 807] exit_group(0) = ?
[pid 809] <... futex resumed>) = ?
[pid 808] <... futex resumed>) = ?
[pid 808] +++ exited with 0 +++
[pid 809] +++ exited with 0 +++
[pid 807] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=807, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 810 attached
, child_tidptr=0x5555560865d0) = 810
[pid 810] set_robust_list(0x5555560865e0, 24) = 0
[pid 810] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 810] setpgid(0, 0) = 0
[pid 810] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 810] write(3, "1000", 4) = 4
[pid 810] close(3) = 0
[pid 810] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 810] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 810] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 810] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[811], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 811
./strace-static-x86_64: Process 811 attached
[pid 811] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 811] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 810] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 811] <... futex resumed>) = 0
[pid 811] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 811] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 811] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 810] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 810] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 811] <... futex resumed>) = 0
[pid 811] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 810] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 811] <... mount resumed>) = 0
[pid 811] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 810] <... futex resumed>) = 0
[pid 810] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 810] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 811] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 811] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 810] <... futex resumed>) = 0
[pid 810] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 810] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 810] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 810] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 811] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 810] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[812], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 812
[pid 810] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 810] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 812 attached
<unfinished ...>
[pid 812] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 811] <... umount2 resumed>) = 0
[pid 812] <... set_robust_list resumed>) = 0
[pid 812] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 811] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 812] <... umount2 resumed>) = 0
[pid 812] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 810] <... futex resumed>) = 0
[pid 810] exit_group(0 <unfinished ...>
[pid 811] <... futex resumed>) = 0
[pid 810] <... exit_group resumed>) = ?
[pid 812] <... futex resumed>) = ?
[pid 812] +++ exited with 0 +++
[pid 811] +++ exited with 0 +++
[pid 810] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=810, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 813
./strace-static-x86_64: Process 813 attached
[pid 813] set_robust_list(0x5555560865e0, 24) = 0
[pid 813] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 813] setpgid(0, 0) = 0
[pid 813] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 813] write(3, "1000", 4) = 4
[pid 813] close(3) = 0
[pid 813] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 813] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 813] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 813] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 814 attached
<unfinished ...>
[pid 814] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 814] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 813] <... clone resumed>, parent_tid=[814], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 814
[pid 813] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 814] <... futex resumed>) = 0
[pid 814] mkdir("./file0", 000 <unfinished ...>
[pid 813] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 814] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 814] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 814] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 813] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 813] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 814] <... futex resumed>) = 0
[pid 814] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 813] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 814] <... mount resumed>) = 0
[pid 814] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 814] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 813] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 813] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 814] <... futex resumed>) = 0
[pid 814] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 813] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 814] <... mount resumed>) = 0
[pid 814] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 814] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 813] <... futex resumed>) = 0
[pid 813] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 814] <... futex resumed>) = 0
[pid 814] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 813] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 814] <... umount2 resumed>) = 0
[pid 813] <... futex resumed>) = 0
[pid 814] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 814] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 813] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 813] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 813] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[815], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 815
[pid 813] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 813] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 815 attached
<unfinished ...>
[pid 815] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 815] umount2("./file0", MNT_DETACH) = 0
[pid 815] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 813] <... futex resumed>) = 0
[pid 813] exit_group(0 <unfinished ...>
[pid 814] <... futex resumed>) = ?
[pid 813] <... exit_group resumed>) = ?
[pid 814] +++ exited with 0 +++
[pid 815] <... futex resumed>) = ?
[pid 815] +++ exited with 0 +++
[pid 813] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=813, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 816
./strace-static-x86_64: Process 816 attached
[pid 816] set_robust_list(0x5555560865e0, 24) = 0
[pid 816] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 816] setpgid(0, 0) = 0
[pid 816] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 816] write(3, "1000", 4) = 4
[pid 816] close(3) = 0
[pid 816] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 816] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 816] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 816] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[817], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 817
[pid 816] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 816] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 817 attached
<unfinished ...>
[pid 817] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 817] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 817] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 816] <... futex resumed>) = 0
[pid 816] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 816] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 817] <... futex resumed>) = 1
[pid 817] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 817] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 816] <... futex resumed>) = 0
[pid 816] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 816] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 817] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 817] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 816] <... futex resumed>) = 0
[pid 816] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 816] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 816] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 816] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 816] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 818 attached
, parent_tid=[818], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 818
[pid 818] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 816] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 818] <... set_robust_list resumed>) = 0
[pid 816] <... futex resumed>) = 0
[pid 818] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 816] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 817] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 818] <... umount2 resumed>) = 0
[pid 818] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 816] <... futex resumed>) = 0
[pid 818] <... futex resumed>) = 1
[pid 818] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 817] <... umount2 resumed>) = 0
[pid 817] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 816] exit_group(0 <unfinished ...>
[pid 817] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 816] <... exit_group resumed>) = ?
[pid 818] <... futex resumed>) = ?
[pid 818] +++ exited with 0 +++
[pid 817] <... futex resumed>) = ?
[pid 817] +++ exited with 0 +++
[pid 816] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=816, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 819
./strace-static-x86_64: Process 819 attached
[pid 819] set_robust_list(0x5555560865e0, 24) = 0
[pid 819] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 819] setpgid(0, 0) = 0
[pid 819] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 819] write(3, "1000", 4) = 4
[pid 819] close(3) = 0
[pid 819] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 819] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 819] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 819] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[820], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 820
[pid 819] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 819] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 820 attached
<unfinished ...>
[pid 820] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 820] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 820] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 819] <... futex resumed>) = 0
[pid 819] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 819] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 820] <... futex resumed>) = 1
[pid 820] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 820] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 819] <... futex resumed>) = 0
[pid 819] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 819] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 820] <... futex resumed>) = 1
[pid 820] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 820] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 819] <... futex resumed>) = 0
[pid 819] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 819] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 819] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 819] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 819] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[821], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 821
[pid 819] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 819] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 820] <... futex resumed>) = 1
[pid 820] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 821 attached
<unfinished ...>
[pid 821] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 820] <... umount2 resumed>) = 0
[pid 820] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 820] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 821] <... set_robust_list resumed>) = 0
[pid 821] umount2("./file0", MNT_DETACH) = 0
[pid 821] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 819] <... futex resumed>) = 0
[pid 819] exit_group(0) = ?
[pid 820] <... futex resumed>) = ?
[pid 820] +++ exited with 0 +++
[pid 821] +++ exited with 0 +++
[pid 819] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=819, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 822
./strace-static-x86_64: Process 822 attached
[pid 822] set_robust_list(0x5555560865e0, 24) = 0
[pid 822] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 822] setpgid(0, 0) = 0
[pid 822] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 822] write(3, "1000", 4) = 4
[pid 822] close(3) = 0
[pid 822] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 822] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 822] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 822] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[823], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 823
[pid 822] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 822] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 823 attached
<unfinished ...>
[pid 823] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 823] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 823] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 822] <... futex resumed>) = 0
[pid 822] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 822] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 823] <... futex resumed>) = 1
[pid 823] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 823] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 822] <... futex resumed>) = 0
[pid 822] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 822] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 823] <... futex resumed>) = 1
[pid 823] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 823] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 822] <... futex resumed>) = 0
[pid 822] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 822] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 822] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 822] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 822] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[824], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 824
[pid 822] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 822] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 823] <... futex resumed>) = 1
[pid 823] umount2("./file0", MNT_DETACH) = 0
[pid 823] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 823] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 824 attached
<unfinished ...>
[pid 824] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 824] umount2("./file0", MNT_DETACH) = 0
[pid 824] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 822] <... futex resumed>) = 0
[pid 822] exit_group(0) = ?
[pid 823] <... futex resumed>) = ?
[pid 823] +++ exited with 0 +++
[pid 824] +++ exited with 0 +++
[pid 822] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=822, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 825
./strace-static-x86_64: Process 825 attached
[pid 825] set_robust_list(0x5555560865e0, 24) = 0
[pid 825] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 825] setpgid(0, 0) = 0
[pid 825] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 825] write(3, "1000", 4) = 4
[pid 825] close(3) = 0
[pid 825] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 825] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 825] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 825] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 826 attached
<unfinished ...>
[pid 826] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 826] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 825] <... clone resumed>, parent_tid=[826], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 826
[pid 825] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 826] <... futex resumed>) = 0
[pid 826] mkdir("./file0", 000 <unfinished ...>
[pid 825] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 826] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 826] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 826] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 825] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 825] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 826] <... futex resumed>) = 0
[pid 826] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 825] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 826] <... mount resumed>) = 0
[pid 826] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 826] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 825] <... futex resumed>) = 0
[pid 825] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 826] <... futex resumed>) = 0
[pid 825] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 826] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 826] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 825] <... futex resumed>) = 0
[pid 825] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 825] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 826] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 825] <... futex resumed>) = 0
[pid 825] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 825] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 826] <... umount2 resumed>) = 0
[pid 825] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 826] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 826] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 827 attached
<unfinished ...>
[pid 825] <... clone resumed>, parent_tid=[827], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 827
[pid 827] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 827] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 825] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 827] <... futex resumed>) = 0
[pid 825] <... futex resumed>) = 1
[pid 825] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 827] umount2("./file0", MNT_DETACH) = 0
[pid 827] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 825] <... futex resumed>) = 0
[pid 827] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 825] exit_group(0) = ?
[pid 826] <... futex resumed>) = ?
[pid 826] +++ exited with 0 +++
[pid 827] <... futex resumed>) = ?
[pid 827] +++ exited with 0 +++
[pid 825] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=825, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 828
./strace-static-x86_64: Process 828 attached
[pid 828] set_robust_list(0x5555560865e0, 24) = 0
[pid 828] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 828] setpgid(0, 0) = 0
[pid 828] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 828] write(3, "1000", 4) = 4
[pid 828] close(3) = 0
[pid 828] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 828] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 828] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 828] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 829 attached
<unfinished ...>
[pid 829] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 828] <... clone resumed>, parent_tid=[829], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 829
[pid 829] <... set_robust_list resumed>) = 0
[pid 829] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 828] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 829] <... futex resumed>) = 0
[pid 829] mkdir("./file0", 000 <unfinished ...>
[pid 828] <... futex resumed>) = 1
[pid 829] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 828] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 829] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 828] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 829] <... futex resumed>) = 0
[pid 829] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 828] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 829] <... futex resumed>) = 0
[pid 829] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 828] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 829] <... mount resumed>) = 0
[pid 829] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 828] <... futex resumed>) = 0
[pid 829] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 828] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 828] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 829] <... mount resumed>) = 0
[pid 829] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 828] <... futex resumed>) = 0
[pid 829] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 828] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 828] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 828] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 828] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 828] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 829] <... umount2 resumed>) = 0
[pid 829] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 828] <... clone resumed>, parent_tid=[830], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 830
[pid 829] <... futex resumed>) = 0
[pid 828] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 829] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 828] <... futex resumed>) = 0
./strace-static-x86_64: Process 830 attached
[pid 828] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 830] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 830] umount2("./file0", MNT_DETACH) = 0
[pid 830] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 830] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 828] <... futex resumed>) = 0
[pid 828] exit_group(0) = ?
[pid 829] <... futex resumed>) = ?
[pid 829] +++ exited with 0 +++
[pid 830] <... futex resumed>) = ?
[pid 830] +++ exited with 0 +++
[pid 828] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=828, si_uid=0, si_status=0, si_utime=0, si_stime=1} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 831
./strace-static-x86_64: Process 831 attached
[pid 831] set_robust_list(0x5555560865e0, 24) = 0
[pid 831] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 831] setpgid(0, 0) = 0
[pid 831] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 831] write(3, "1000", 4) = 4
[pid 831] close(3) = 0
[pid 831] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 831] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 831] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 831] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 832 attached
, parent_tid=[832], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 832
[pid 832] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 832] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 831] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 832] <... futex resumed>) = 0
[pid 831] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 832] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 832] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 832] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 831] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 831] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 832] <... futex resumed>) = 0
[pid 831] <... futex resumed>) = 1
[pid 832] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 831] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 832] <... mount resumed>) = 0
[pid 832] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 832] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 831] <... futex resumed>) = 0
[pid 831] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 832] <... futex resumed>) = 0
[pid 831] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 832] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 832] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 831] <... futex resumed>) = 0
[pid 832] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 831] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 832] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 831] <... futex resumed>) = 0
[pid 832] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 831] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 831] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 832] <... umount2 resumed>) = 0
[pid 831] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 832] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 831] <... mprotect resumed>) = 0
[pid 832] <... futex resumed>) = 0
[pid 831] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 832] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 833 attached
<unfinished ...>
[pid 831] <... clone resumed>, parent_tid=[833], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 833
[pid 833] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 831] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 833] <... set_robust_list resumed>) = 0
[pid 831] <... futex resumed>) = 0
[pid 833] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 831] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 833] <... umount2 resumed>) = 0
[pid 833] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 831] <... futex resumed>) = 0
[pid 833] <... futex resumed>) = 1
[pid 831] exit_group(0 <unfinished ...>
[pid 833] ????( <unfinished ...>
[pid 831] <... exit_group resumed>) = ?
[pid 833] <... ???? resumed>) = ?
[pid 832] <... futex resumed>) = ?
[pid 832] +++ exited with 0 +++
[pid 833] +++ exited with 0 +++
[pid 831] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=831, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 834
./strace-static-x86_64: Process 834 attached
[pid 834] set_robust_list(0x5555560865e0, 24) = 0
[pid 834] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 834] setpgid(0, 0) = 0
[pid 834] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 834] write(3, "1000", 4) = 4
[pid 834] close(3) = 0
[pid 834] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 834] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 834] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 834] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 835 attached
, parent_tid=[835], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 835
[pid 835] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 834] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 834] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 835] <... set_robust_list resumed>) = 0
[pid 835] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 835] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 834] <... futex resumed>) = 0
[pid 834] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 834] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 835] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 835] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 834] <... futex resumed>) = 0
[pid 834] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 834] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 835] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 835] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 834] <... futex resumed>) = 0
[pid 834] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 834] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 834] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 834] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 834] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[836], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 836
[pid 834] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 834] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 836 attached
<unfinished ...>
[pid 836] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 836] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 835] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 836] <... umount2 resumed>) = 0
[pid 835] <... umount2 resumed>) = 0
[pid 836] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 834] <... futex resumed>) = 0
[pid 836] <... futex resumed>) = 1
[pid 836] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 835] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 835] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 834] exit_group(0) = ?
[pid 836] <... futex resumed>) = ?
[pid 836] +++ exited with 0 +++
[pid 835] <... futex resumed>) = ?
[pid 835] +++ exited with 0 +++
[pid 834] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=834, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 837
./strace-static-x86_64: Process 837 attached
[pid 837] set_robust_list(0x5555560865e0, 24) = 0
[pid 837] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 837] setpgid(0, 0) = 0
[pid 837] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 837] write(3, "1000", 4) = 4
[pid 837] close(3) = 0
[pid 837] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 837] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 837] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 837] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 838 attached
<unfinished ...>
[pid 838] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 838] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 837] <... clone resumed>, parent_tid=[838], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 838
[pid 837] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 838] <... futex resumed>) = 0
[pid 838] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 838] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 838] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 837] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 837] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 838] <... futex resumed>) = 0
[pid 838] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 838] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 838] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 837] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 837] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 838] <... futex resumed>) = 0
[pid 838] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 837] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 838] <... mount resumed>) = 0
[pid 838] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 838] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 837] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 837] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 838] <... futex resumed>) = 0
[pid 838] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 837] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 838] <... umount2 resumed>) = 0
[pid 838] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 838] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 837] <... futex resumed>) = 0
[pid 837] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 837] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 837] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 839 attached
, parent_tid=[839], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 839
[pid 839] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 839] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 837] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 839] <... futex resumed>) = 0
[pid 837] <... futex resumed>) = 1
[pid 839] umount2("./file0", MNT_DETACH) = 0
[pid 839] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 839] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 837] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 837] exit_group(0 <unfinished ...>
[pid 838] <... futex resumed>) = ?
[pid 837] <... exit_group resumed>) = ?
[pid 838] +++ exited with 0 +++
[pid 839] <... futex resumed>) = ?
[pid 839] +++ exited with 0 +++
[pid 837] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=837, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 840
./strace-static-x86_64: Process 840 attached
[pid 840] set_robust_list(0x5555560865e0, 24) = 0
[pid 840] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 840] setpgid(0, 0) = 0
[pid 840] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 840] write(3, "1000", 4) = 4
[pid 840] close(3) = 0
[pid 840] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 840] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 840] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 840] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 841 attached
, parent_tid=[841], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 841
[pid 841] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 841] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 840] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 841] <... futex resumed>) = 0
[pid 840] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 841] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 841] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 840] <... futex resumed>) = 0
[pid 840] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 840] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 841] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 841] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 840] <... futex resumed>) = 0
[pid 840] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 840] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 841] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 841] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 840] <... futex resumed>) = 0
[pid 841] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 840] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 841] <... umount2 resumed>) = 0
[pid 840] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 841] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 840] <... futex resumed>) = 0
[pid 840] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 841] <... futex resumed>) = 0
[pid 840] <... mmap resumed>) = 0x7f236e446000
[pid 841] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 840] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 840] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 842 attached
, parent_tid=[842], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 842
[pid 842] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 842] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 840] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 840] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 842] <... futex resumed>) = 0
[pid 842] umount2("./file0", MNT_DETACH) = 0
[pid 842] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 840] <... futex resumed>) = 0
[pid 842] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 840] exit_group(0) = ?
[pid 841] <... futex resumed>) = ?
[pid 841] +++ exited with 0 +++
[pid 842] <... futex resumed>) = ?
[pid 842] +++ exited with 0 +++
[pid 840] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=840, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 843
./strace-static-x86_64: Process 843 attached
[pid 843] set_robust_list(0x5555560865e0, 24) = 0
[pid 843] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 843] setpgid(0, 0) = 0
[pid 843] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 843] write(3, "1000", 4) = 4
[pid 843] close(3) = 0
[pid 843] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 843] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 843] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 843] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 844 attached
, parent_tid=[844], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 844
[pid 844] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 843] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 844] <... set_robust_list resumed>) = 0
[pid 843] <... futex resumed>) = 0
[pid 843] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 844] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 844] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 843] <... futex resumed>) = 0
[pid 844] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 843] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 844] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 843] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 844] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 844] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 843] <... futex resumed>) = 0
[pid 844] <... futex resumed>) = 1
[pid 843] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 844] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 843] <... futex resumed>) = 0
[pid 843] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 844] <... mount resumed>) = 0
[pid 844] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 843] <... futex resumed>) = 0
[pid 844] <... futex resumed>) = 1
[pid 843] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 844] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 843] <... futex resumed>) = 0
[pid 843] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 843] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 843] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 843] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 844] <... umount2 resumed>) = 0
[pid 844] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 845 attached
) = 0
[pid 843] <... clone resumed>, parent_tid=[845], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 845
[pid 845] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 843] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 844] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 843] <... futex resumed>) = 0
[pid 843] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 845] <... set_robust_list resumed>) = 0
[pid 845] umount2("./file0", MNT_DETACH) = 0
[pid 845] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 843] <... futex resumed>) = 0
[pid 843] exit_group(0 <unfinished ...>
[pid 845] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 843] <... exit_group resumed>) = ?
[pid 845] <... futex resumed>) = ?
[pid 844] <... futex resumed>) = ?
[pid 844] +++ exited with 0 +++
[pid 845] +++ exited with 0 +++
[pid 843] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=843, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 846 attached
, child_tidptr=0x5555560865d0) = 846
[pid 846] set_robust_list(0x5555560865e0, 24) = 0
[pid 846] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 846] setpgid(0, 0) = 0
[pid 846] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 846] write(3, "1000", 4) = 4
[pid 846] close(3) = 0
[pid 846] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 846] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 846] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 846] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 847 attached
, parent_tid=[847], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 847
[pid 847] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 846] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 847] <... set_robust_list resumed>) = 0
[pid 846] <... futex resumed>) = 0
[pid 846] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 847] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 847] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 846] <... futex resumed>) = 0
[pid 847] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 846] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 847] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 846] <... futex resumed>) = 0
[pid 847] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 846] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 847] <... mount resumed>) = 0
[pid 847] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 846] <... futex resumed>) = 0
[pid 847] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 846] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 847] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 846] <... futex resumed>) = 0
[pid 847] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 846] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 847] <... mount resumed>) = 0
[pid 847] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 846] <... futex resumed>) = 0
[pid 847] <... futex resumed>) = 1
[pid 846] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 847] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 846] <... futex resumed>) = 0
[pid 846] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 846] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 846] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 846] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 847] <... umount2 resumed>) = 0
[pid 847] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 848 attached
) = 0
[pid 846] <... clone resumed>, parent_tid=[848], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 848
[pid 848] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 847] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 848] <... set_robust_list resumed>) = 0
[pid 846] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 848] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 846] <... futex resumed>) = 0
[pid 846] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 848] <... umount2 resumed>) = 0
[pid 848] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 846] <... futex resumed>) = 0
[pid 848] <... futex resumed>) = 1
[pid 846] exit_group(0 <unfinished ...>
[pid 848] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 846] <... exit_group resumed>) = ?
[pid 847] <... futex resumed>) = ?
[pid 847] +++ exited with 0 +++
[pid 848] <... futex resumed>) = ?
[pid 848] +++ exited with 0 +++
[pid 846] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=846, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 849
./strace-static-x86_64: Process 849 attached
[pid 849] set_robust_list(0x5555560865e0, 24) = 0
[pid 849] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 849] setpgid(0, 0) = 0
[pid 849] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 849] write(3, "1000", 4) = 4
[pid 849] close(3) = 0
[pid 849] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 849] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 849] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 849] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 850 attached
<unfinished ...>
[pid 850] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 850] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 849] <... clone resumed>, parent_tid=[850], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 850
[pid 849] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 850] <... futex resumed>) = 0
[pid 850] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 850] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 850] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 849] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 849] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 850] <... futex resumed>) = 0
[pid 850] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 849] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 850] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 850] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 849] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 849] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 850] <... futex resumed>) = 0
[pid 850] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 849] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 850] <... mount resumed>) = 0
[pid 850] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 849] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 850] <... futex resumed>) = 0
[pid 850] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 849] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 850] <... futex resumed>) = 0
[pid 850] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 849] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 850] <... umount2 resumed>) = 0
[pid 849] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 850] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 850] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 849] <... mmap resumed>) = 0x7f236e446000
[pid 849] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 849] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 851 attached
, parent_tid=[851], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 851
[pid 851] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 851] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 849] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 851] <... futex resumed>) = 0
[pid 849] <... futex resumed>) = 1
[pid 851] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 849] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 851] <... umount2 resumed>) = 0
[pid 851] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 851] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 849] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 849] exit_group(0 <unfinished ...>
[pid 850] <... futex resumed>) = ?
[pid 849] <... exit_group resumed>) = ?
[pid 850] +++ exited with 0 +++
[pid 851] <... futex resumed>) = ?
[pid 851] +++ exited with 0 +++
[pid 849] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=849, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 852
./strace-static-x86_64: Process 852 attached
[pid 852] set_robust_list(0x5555560865e0, 24) = 0
[pid 852] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 852] setpgid(0, 0) = 0
[pid 852] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 852] write(3, "1000", 4) = 4
[pid 852] close(3) = 0
[pid 852] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 852] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 852] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 852] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 853 attached
, parent_tid=[853], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 853
[pid 853] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 852] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 853] <... set_robust_list resumed>) = 0
[pid 852] <... futex resumed>) = 0
[pid 852] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 853] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 853] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 852] <... futex resumed>) = 0
[pid 853] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 852] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 853] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 852] <... futex resumed>) = 0
[pid 853] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 852] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 853] <... mount resumed>) = 0
[pid 853] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 852] <... futex resumed>) = 0
[pid 852] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 853] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 852] <... futex resumed>) = 0
[pid 852] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 853] <... mount resumed>) = 0
[pid 853] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 852] <... futex resumed>) = 0
[pid 853] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 852] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 853] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 852] <... futex resumed>) = 0
[pid 853] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 852] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 852] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 852] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 852] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 853] <... umount2 resumed>) = 0
[pid 852] <... clone resumed>, parent_tid=[854], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 854
./strace-static-x86_64: Process 854 attached
[pid 853] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 852] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 854] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 853] <... futex resumed>) = 0
[pid 852] <... futex resumed>) = 0
[pid 854] <... set_robust_list resumed>) = 0
[pid 852] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 853] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 854] umount2("./file0", MNT_DETACH) = 0
[pid 854] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 852] <... futex resumed>) = 0
[pid 854] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 852] exit_group(0 <unfinished ...>
[pid 854] <... futex resumed>) = ?
[pid 852] <... exit_group resumed>) = ?
[pid 854] +++ exited with 0 +++
[pid 853] <... futex resumed>) = ?
[pid 853] +++ exited with 0 +++
[pid 852] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=852, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 855
./strace-static-x86_64: Process 855 attached
[pid 855] set_robust_list(0x5555560865e0, 24) = 0
[pid 855] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 855] setpgid(0, 0) = 0
[pid 855] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 855] write(3, "1000", 4) = 4
[pid 855] close(3) = 0
[pid 855] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 855] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 855] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 855] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[856], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 856
[pid 855] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 855] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 856 attached
<unfinished ...>
[pid 856] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 856] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 856] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 855] <... futex resumed>) = 0
[pid 855] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 855] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 856] <... futex resumed>) = 1
[pid 856] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 856] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 855] <... futex resumed>) = 0
[pid 856] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 855] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 855] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 856] <... mount resumed>) = 0
[pid 856] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 855] <... futex resumed>) = 0
[pid 855] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 855] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 856] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 855] <... futex resumed>) = 0
[pid 855] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 855] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 856] <... umount2 resumed>) = 0
[pid 855] <... mprotect resumed>) = 0
[pid 855] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 856] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 857 attached
<unfinished ...>
[pid 855] <... clone resumed>, parent_tid=[857], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 857
[pid 855] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 855] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 856] <... futex resumed>) = 0
[pid 856] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 857] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 857] umount2("./file0", MNT_DETACH) = 0
[pid 857] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 855] <... futex resumed>) = 0
[pid 855] exit_group(0 <unfinished ...>
[pid 856] <... futex resumed>) = ?
[pid 855] <... exit_group resumed>) = ?
[pid 856] +++ exited with 0 +++
[pid 857] +++ exited with 0 +++
[pid 855] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=855, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 858
./strace-static-x86_64: Process 858 attached
[pid 858] set_robust_list(0x5555560865e0, 24) = 0
[pid 858] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 858] setpgid(0, 0) = 0
[pid 858] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 858] write(3, "1000", 4) = 4
[pid 858] close(3) = 0
[pid 858] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 858] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 858] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 858] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 859 attached
, parent_tid=[859], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 859
[pid 859] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 859] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 858] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 859] <... futex resumed>) = 0
[pid 859] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 859] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 859] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 858] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 858] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 859] <... futex resumed>) = 0
[pid 858] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 859] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 859] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 858] <... futex resumed>) = 0
[pid 858] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 858] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 859] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 859] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 858] <... futex resumed>) = 0
[pid 859] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid 858] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 859] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 858] <... futex resumed>) = 0
[pid 858] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 858] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 858] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 859] <... umount2 resumed>) = 0
[pid 858] <... mprotect resumed>) = 0
[pid 858] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 859] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 858] <... clone resumed>, parent_tid=[860], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 860
[pid 858] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 858] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 859] <... futex resumed>) = 0
[pid 859] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 860 attached
<unfinished ...>
[pid 860] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 860] umount2("./file0", MNT_DETACH) = 0
[pid 860] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 858] <... futex resumed>) = 0
[pid 858] exit_group(0) = ?
[pid 859] <... futex resumed>) = ?
[pid 859] +++ exited with 0 +++
[pid 860] <... futex resumed>) = ?
[pid 860] +++ exited with 0 +++
[pid 858] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=858, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 861 attached
, child_tidptr=0x5555560865d0) = 861
[pid 861] set_robust_list(0x5555560865e0, 24) = 0
[pid 861] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 861] setpgid(0, 0) = 0
[pid 861] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 861] write(3, "1000", 4) = 4
[pid 861] close(3) = 0
[pid 861] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 861] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 861] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 861] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 862 attached
, parent_tid=[862], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 862
[pid 862] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 861] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 861] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 862] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 862] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 861] <... futex resumed>) = 0
[pid 861] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 861] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 862] <... futex resumed>) = 1
[pid 862] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 862] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 861] <... futex resumed>) = 0
[pid 862] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 861] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 861] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 862] <... mount resumed>) = 0
[pid 862] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 861] <... futex resumed>) = 0
[pid 862] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 861] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 861] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 862] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 862] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 861] <... futex resumed>) = 0
[pid 861] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 861] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 861] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 862] <... umount2 resumed>) = 0
[pid 861] <... clone resumed>, parent_tid=[863], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 863
[pid 861] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 861] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 863 attached
<unfinished ...>
[pid 862] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 863] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 862] <... futex resumed>) = 0
[pid 863] <... set_robust_list resumed>) = 0
[pid 862] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 863] umount2("./file0", MNT_DETACH) = 0
[pid 863] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 861] <... futex resumed>) = 0
[pid 863] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 861] exit_group(0 <unfinished ...>
[pid 863] <... futex resumed>) = 231
[pid 861] <... exit_group resumed>) = ?
[pid 863] +++ exited with 0 +++
[pid 862] <... futex resumed>) = ?
[pid 862] +++ exited with 0 +++
[pid 861] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=861, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 864
./strace-static-x86_64: Process 864 attached
[pid 864] set_robust_list(0x5555560865e0, 24) = 0
[pid 864] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 864] setpgid(0, 0) = 0
[pid 864] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 864] write(3, "1000", 4) = 4
[pid 864] close(3) = 0
[pid 864] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 864] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 864] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 864] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 865 attached
<unfinished ...>
[pid 865] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 865] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 864] <... clone resumed>, parent_tid=[865], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 865
[pid 864] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 865] <... futex resumed>) = 0
[pid 864] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 865] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 865] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 865] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 864] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 864] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 865] <... futex resumed>) = 0
[pid 865] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 864] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 865] <... mount resumed>) = 0
[pid 865] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 865] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 864] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 864] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 865] <... futex resumed>) = 0
[pid 865] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 864] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 865] <... mount resumed>) = 0
[pid 865] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 865] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 864] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 864] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 865] <... futex resumed>) = 0
[pid 864] <... futex resumed>) = 1
[pid 865] umount2("./file0", MNT_DETACH) = 0
[pid 864] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 865] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 865] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 864] <... futex resumed>) = 0
[pid 864] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 864] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 864] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 866 attached
, parent_tid=[866], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 866
[pid 866] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 866] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 864] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 866] <... futex resumed>) = 0
[pid 866] umount2("./file0", MNT_DETACH) = 0
[pid 864] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 866] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 866] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 864] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 864] exit_group(0 <unfinished ...>
[pid 865] <... futex resumed>) = ?
[pid 864] <... exit_group resumed>) = ?
[pid 865] +++ exited with 0 +++
[pid 866] <... futex resumed>) = ?
[pid 866] +++ exited with 0 +++
[pid 864] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=864, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 867
./strace-static-x86_64: Process 867 attached
[pid 867] set_robust_list(0x5555560865e0, 24) = 0
[pid 867] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 867] setpgid(0, 0) = 0
[pid 867] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 867] write(3, "1000", 4) = 4
[pid 867] close(3) = 0
[pid 867] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 867] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 867] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 867] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[868], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 868
[pid 867] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 867] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 868 attached
<unfinished ...>
[pid 868] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 868] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 868] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 867] <... futex resumed>) = 0
[pid 867] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 867] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 868] <... futex resumed>) = 1
[pid 868] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 868] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 867] <... futex resumed>) = 0
[pid 868] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 867] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 868] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 867] <... futex resumed>) = 0
[pid 868] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 867] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 868] <... mount resumed>) = 0
[pid 868] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 867] <... futex resumed>) = 0
[pid 868] <... futex resumed>) = 1
[pid 867] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 868] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 867] <... futex resumed>) = 0
[pid 867] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 867] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 867] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 867] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 868] <... umount2 resumed>) = 0
[pid 868] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 869 attached
) = 0
[pid 867] <... clone resumed>, parent_tid=[869], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 869
[pid 869] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 868] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 867] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 869] <... set_robust_list resumed>) = 0
[pid 867] <... futex resumed>) = 0
[pid 869] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 867] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 869] <... umount2 resumed>) = 0
[pid 869] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 867] <... futex resumed>) = 0
[pid 867] exit_group(0 <unfinished ...>
[pid 869] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 867] <... exit_group resumed>) = ?
[pid 868] <... futex resumed>) = ?
[pid 868] +++ exited with 0 +++
[pid 869] <... futex resumed>) = ?
[pid 869] +++ exited with 0 +++
[pid 867] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=867, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 870
./strace-static-x86_64: Process 870 attached
[pid 870] set_robust_list(0x5555560865e0, 24) = 0
[pid 870] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 870] setpgid(0, 0) = 0
[pid 870] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 870] write(3, "1000", 4) = 4
[pid 870] close(3) = 0
[pid 870] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 870] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 870] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 870] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 871 attached
, parent_tid=[871], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 871
[pid 870] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 870] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 871] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 871] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 871] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 870] <... futex resumed>) = 0
[pid 870] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 871] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 870] <... futex resumed>) = 0
[pid 870] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 871] <... mount resumed>) = 0
[pid 871] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 870] <... futex resumed>) = 0
[pid 870] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 870] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 871] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 871] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 870] <... futex resumed>) = 0
[pid 870] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 870] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 870] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 870] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 871] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 870] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 871] <... umount2 resumed>) = 0
[pid 870] <... clone resumed>, parent_tid=[872], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 872
[pid 870] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 870] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 872 attached
<unfinished ...>
[pid 872] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 872] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 871] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 872] <... umount2 resumed>) = 0
[pid 871] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 872] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 870] <... futex resumed>) = 0
[pid 870] exit_group(0) = ?
[pid 872] <... futex resumed>) = ?
[pid 871] <... futex resumed>) = ?
[pid 872] +++ exited with 0 +++
[pid 871] +++ exited with 0 +++
[pid 870] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=870, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 873
./strace-static-x86_64: Process 873 attached
[pid 873] set_robust_list(0x5555560865e0, 24) = 0
[pid 873] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 873] setpgid(0, 0) = 0
[pid 873] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 873] write(3, "1000", 4) = 4
[pid 873] close(3) = 0
[pid 873] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 873] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 873] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 873] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[874], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 874
[pid 873] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 873] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 874 attached
<unfinished ...>
[pid 874] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 874] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 874] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 873] <... futex resumed>) = 0
[pid 873] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 873] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 874] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 874] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 873] <... futex resumed>) = 0
[pid 873] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 873] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 874] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 874] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 873] <... futex resumed>) = 0
[pid 873] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 873] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 873] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 873] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 873] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 874] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 873] <... clone resumed>, parent_tid=[875], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 875
[pid 873] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 873] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 875 attached
<unfinished ...>
[pid 875] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 875] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 874] <... umount2 resumed>) = 0
[pid 874] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 875] <... umount2 resumed>) = 0
[pid 874] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 875] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 873] <... futex resumed>) = 0
[pid 873] exit_group(0) = ?
[pid 875] <... futex resumed>) = ?
[pid 874] <... futex resumed>) = ?
[pid 875] +++ exited with 0 +++
[pid 874] +++ exited with 0 +++
[pid 873] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=873, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 876
./strace-static-x86_64: Process 876 attached
[pid 876] set_robust_list(0x5555560865e0, 24) = 0
[pid 876] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 876] setpgid(0, 0) = 0
[pid 876] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 876] write(3, "1000", 4) = 4
[pid 876] close(3) = 0
[pid 876] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 876] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 876] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 876] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 877 attached
<unfinished ...>
[pid 877] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 876] <... clone resumed>, parent_tid=[877], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 877
[pid 877] <... set_robust_list resumed>) = 0
[pid 877] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 876] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 877] <... futex resumed>) = 0
[pid 877] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 877] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 877] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 876] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 876] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 877] <... futex resumed>) = 0
[pid 877] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 876] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 877] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 877] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 876] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 876] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 877] <... futex resumed>) = 0
[pid 877] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 876] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 877] <... mount resumed>) = 0
[pid 877] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 877] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 876] <... futex resumed>) = 0
[pid 876] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 877] <... futex resumed>) = 0
[pid 877] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 876] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 877] <... umount2 resumed>) = 0
[pid 876] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 877] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 877] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 876] <... mmap resumed>) = 0x7f236e446000
[pid 876] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 876] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 878 attached
<unfinished ...>
[pid 878] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 878] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 876] <... clone resumed>, parent_tid=[878], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 878
[pid 876] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 878] <... futex resumed>) = 0
[pid 878] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 876] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 878] <... umount2 resumed>) = 0
[pid 878] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 876] <... futex resumed>) = 0
[pid 878] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 876] exit_group(0 <unfinished ...>
[pid 878] <... futex resumed>) = ?
[pid 877] <... futex resumed>) = ?
[pid 876] <... exit_group resumed>) = ?
[pid 877] +++ exited with 0 +++
[pid 878] +++ exited with 0 +++
[pid 876] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=876, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 879
./strace-static-x86_64: Process 879 attached
[pid 879] set_robust_list(0x5555560865e0, 24) = 0
[pid 879] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 879] setpgid(0, 0) = 0
[pid 879] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 879] write(3, "1000", 4) = 4
[pid 879] close(3) = 0
[pid 879] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 879] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 879] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 879] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 880 attached
<unfinished ...>
[pid 880] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 880] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 879] <... clone resumed>, parent_tid=[880], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 880
[pid 879] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 880] <... futex resumed>) = 0
[pid 879] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 880] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 880] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 879] <... futex resumed>) = 0
[pid 880] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 879] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 880] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 879] <... futex resumed>) = 0
[pid 880] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 879] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 880] <... mount resumed>) = 0
[pid 880] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 879] <... futex resumed>) = 0
[pid 879] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 879] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 880] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 880] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 879] <... futex resumed>) = 0
[pid 879] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 879] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 879] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 880] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 879] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 879] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 880] <... umount2 resumed>) = 0
[pid 879] <... clone resumed>, parent_tid=[881], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 881
[pid 879] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 879] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 881 attached
<unfinished ...>
[pid 881] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 881] umount2("./file0", MNT_DETACH) = 0
[pid 881] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 880] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 879] <... futex resumed>) = 0
[pid 880] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 879] exit_group(0) = ?
[pid 880] <... futex resumed>) = ?
[pid 881] <... futex resumed>) = ?
[pid 881] +++ exited with 0 +++
[pid 880] +++ exited with 0 +++
[pid 879] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=879, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 882
./strace-static-x86_64: Process 882 attached
[pid 882] set_robust_list(0x5555560865e0, 24) = 0
[pid 882] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 882] setpgid(0, 0) = 0
[pid 882] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 882] write(3, "1000", 4) = 4
[pid 882] close(3) = 0
[pid 882] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 882] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 882] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 882] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 883 attached
, parent_tid=[883], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 883
[pid 883] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 882] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 883] <... set_robust_list resumed>) = 0
[pid 882] <... futex resumed>) = 0
[pid 882] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 883] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 883] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 882] <... futex resumed>) = 0
[pid 883] <... futex resumed>) = 1
[pid 882] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 883] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 882] <... futex resumed>) = 0
[pid 882] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 883] <... mount resumed>) = 0
[pid 883] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 882] <... futex resumed>) = 0
[pid 883] <... futex resumed>) = 1
[pid 882] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 883] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 882] <... futex resumed>) = 0
[pid 882] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 883] <... mount resumed>) = 0
[pid 883] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 882] <... futex resumed>) = 0
[pid 883] <... futex resumed>) = 1
[pid 882] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 883] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 882] <... futex resumed>) = 0
[pid 882] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 882] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 882] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 883] <... umount2 resumed>) = 0
[pid 882] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 883] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 884 attached
) = 0
[pid 884] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 883] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 882] <... clone resumed>, parent_tid=[884], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 884
[pid 884] <... set_robust_list resumed>) = 0
[pid 882] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 884] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 882] <... futex resumed>) = 0
[pid 882] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 884] <... umount2 resumed>) = 0
[pid 884] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 882] <... futex resumed>) = 0
[pid 884] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 882] exit_group(0) = ?
[pid 883] <... futex resumed>) = 231
[pid 884] <... futex resumed>) = ?
[pid 883] +++ exited with 0 +++
[pid 884] +++ exited with 0 +++
[pid 882] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=882, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 885
./strace-static-x86_64: Process 885 attached
[pid 885] set_robust_list(0x5555560865e0, 24) = 0
[pid 885] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 885] setpgid(0, 0) = 0
[pid 885] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 885] write(3, "1000", 4) = 4
[pid 885] close(3) = 0
[pid 885] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 885] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 885] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 885] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 886 attached
, parent_tid=[886], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 886
[pid 886] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 885] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 886] <... set_robust_list resumed>) = 0
[pid 885] <... futex resumed>) = 0
[pid 886] mkdir("./file0", 000 <unfinished ...>
[pid 885] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 886] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 886] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 886] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 885] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 885] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 886] <... futex resumed>) = 0
[pid 886] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 885] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 886] <... mount resumed>) = 0
[pid 886] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 885] <... futex resumed>) = 0
[pid 886] <... futex resumed>) = 1
[pid 886] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 885] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 886] <... futex resumed>) = 0
[pid 885] <... futex resumed>) = 1
[pid 886] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 885] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 886] <... mount resumed>) = 0
[pid 886] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 885] <... futex resumed>) = 0
[pid 885] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 885] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 886] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 885] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 885] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 885] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 886] <... umount2 resumed>) = 0
[pid 886] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 886] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 885] <... clone resumed>, parent_tid=[887], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 887
./strace-static-x86_64: Process 887 attached
[pid 885] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 887] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 885] <... futex resumed>) = 0
[pid 887] <... set_robust_list resumed>) = 0
[pid 885] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 887] umount2("./file0", MNT_DETACH) = 0
[pid 887] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 885] <... futex resumed>) = 0
[pid 887] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 885] exit_group(0) = ?
[pid 886] <... futex resumed>) = ?
[pid 886] +++ exited with 0 +++
[pid 887] <... futex resumed>) = ?
[pid 887] +++ exited with 0 +++
[pid 885] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=885, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 888
./strace-static-x86_64: Process 888 attached
[pid 888] set_robust_list(0x5555560865e0, 24) = 0
[pid 888] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 888] setpgid(0, 0) = 0
[pid 888] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 888] write(3, "1000", 4) = 4
[pid 888] close(3) = 0
[pid 888] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 888] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 888] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 888] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 889 attached
<unfinished ...>
[pid 889] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 889] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 888] <... clone resumed>, parent_tid=[889], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 889
[pid 888] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 889] <... futex resumed>) = 0
[pid 888] <... futex resumed>) = 1
[pid 889] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 889] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 889] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 888] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 888] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 888] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 889] <... futex resumed>) = 0
[pid 889] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 889] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 888] <... futex resumed>) = 0
[pid 889] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 888] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 889] <... mount resumed>) = 0
[pid 888] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 889] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 888] <... futex resumed>) = 0
[pid 888] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 888] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 889] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 888] <... futex resumed>) = 0
[pid 888] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 888] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 889] <... umount2 resumed>) = 0
[pid 888] <... mprotect resumed>) = 0
[pid 888] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 889] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 890 attached
<unfinished ...>
[pid 890] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 890] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 889] <... futex resumed>) = 0
[pid 888] <... clone resumed>, parent_tid=[890], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 890
[pid 889] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 888] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 890] <... futex resumed>) = 0
[pid 888] <... futex resumed>) = 1
[pid 890] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 888] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 890] <... umount2 resumed>) = 0
[pid 890] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 888] <... futex resumed>) = 0
[pid 890] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 888] exit_group(0) = ?
[pid 890] <... futex resumed>) = 231
[pid 889] <... futex resumed>) = ?
[pid 890] +++ exited with 0 +++
[pid 889] +++ exited with 0 +++
[pid 888] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=888, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 891
./strace-static-x86_64: Process 891 attached
[pid 891] set_robust_list(0x5555560865e0, 24) = 0
[pid 891] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 891] setpgid(0, 0) = 0
[pid 891] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 891] write(3, "1000", 4) = 4
[pid 891] close(3) = 0
[pid 891] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 891] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 891] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 891] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[892], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 892
[pid 891] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 891] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 892 attached
<unfinished ...>
[pid 892] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 892] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 892] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 891] <... futex resumed>) = 0
[pid 891] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 891] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 892] <... futex resumed>) = 1
[pid 892] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 892] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 891] <... futex resumed>) = 0
[pid 891] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 891] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 892] <... futex resumed>) = 1
[pid 892] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 892] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 891] <... futex resumed>) = 0
[pid 891] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 891] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 891] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 891] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 891] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 893 attached
<unfinished ...>
[pid 892] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 891] <... clone resumed>, parent_tid=[893], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 893
[pid 891] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 892] <... umount2 resumed>) = 0
[pid 891] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 892] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 893] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 892] <... futex resumed>) = 0
[pid 893] <... set_robust_list resumed>) = 0
[pid 892] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 893] umount2("./file0", MNT_DETACH) = 0
[pid 893] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 891] <... futex resumed>) = 0
[pid 891] exit_group(0) = ?
[pid 892] <... futex resumed>) = ?
[pid 892] +++ exited with 0 +++
[pid 893] +++ exited with 0 +++
[pid 891] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=891, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 894
./strace-static-x86_64: Process 894 attached
[pid 894] set_robust_list(0x5555560865e0, 24) = 0
[pid 894] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 894] setpgid(0, 0) = 0
[pid 894] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 894] write(3, "1000", 4) = 4
[pid 894] close(3) = 0
[pid 894] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 894] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 894] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 894] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[895], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 895
[pid 894] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 894] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 895 attached
<unfinished ...>
[pid 895] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 895] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 895] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 894] <... futex resumed>) = 0
[pid 894] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 894] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 895] <... futex resumed>) = 1
[pid 895] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 895] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 894] <... futex resumed>) = 0
[pid 894] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 894] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 895] <... futex resumed>) = 1
[pid 895] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 895] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 894] <... futex resumed>) = 0
[pid 894] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 894] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 894] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 894] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 894] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[896], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 896
[pid 894] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 894] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 895] <... futex resumed>) = 1
[pid 895] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 896 attached
) = 0
[pid 895] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 896] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 895] <... futex resumed>) = 0
[pid 896] <... set_robust_list resumed>) = 0
[pid 895] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 896] umount2("./file0", MNT_DETACH) = 0
[pid 896] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 894] <... futex resumed>) = 0
[pid 894] exit_group(0) = ?
[pid 895] <... futex resumed>) = ?
[pid 895] +++ exited with 0 +++
[pid 896] +++ exited with 0 +++
[pid 894] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=894, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 897
./strace-static-x86_64: Process 897 attached
[pid 897] set_robust_list(0x5555560865e0, 24) = 0
[pid 897] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 897] setpgid(0, 0) = 0
[pid 897] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 897] write(3, "1000", 4) = 4
[pid 897] close(3) = 0
[pid 897] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 897] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 897] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 897] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[898], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 898
[pid 897] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 897] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 898 attached
<unfinished ...>
[pid 898] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 898] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 898] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 897] <... futex resumed>) = 0
[pid 897] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 897] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 898] <... futex resumed>) = 1
[pid 898] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 898] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 897] <... futex resumed>) = 0
[pid 897] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 897] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 898] <... futex resumed>) = 1
[pid 898] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 898] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 897] <... futex resumed>) = 0
[pid 897] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 897] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 897] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 897] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 897] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 899 attached
<unfinished ...>
[pid 898] <... futex resumed>) = 1
[pid 897] <... clone resumed>, parent_tid=[899], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 899
[pid 897] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 898] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 897] <... futex resumed>) = 0
[pid 897] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 898] <... umount2 resumed>) = 0
[pid 899] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 898] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 898] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 899] <... set_robust_list resumed>) = 0
[pid 899] umount2("./file0", MNT_DETACH) = 0
[pid 899] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 897] <... futex resumed>) = 0
[pid 897] exit_group(0) = ?
[pid 898] <... futex resumed>) = ?
[pid 898] +++ exited with 0 +++
[pid 899] +++ exited with 0 +++
[pid 897] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=897, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 900
./strace-static-x86_64: Process 900 attached
[pid 900] set_robust_list(0x5555560865e0, 24) = 0
[pid 900] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 900] setpgid(0, 0) = 0
[pid 900] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 900] write(3, "1000", 4) = 4
[pid 900] close(3) = 0
[pid 900] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 900] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 900] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 900] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 901 attached
, parent_tid=[901], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 901
[pid 901] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 901] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 900] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 901] <... futex resumed>) = 0
[pid 901] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 900] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 901] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 901] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 900] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 900] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 901] <... futex resumed>) = 0
[pid 901] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 900] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 901] <... mount resumed>) = 0
[pid 901] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 901] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 900] <... futex resumed>) = 0
[pid 900] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 901] <... futex resumed>) = 0
[pid 901] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 900] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 901] <... mount resumed>) = 0
[pid 901] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 900] <... futex resumed>) = 0
[pid 901] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 900] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 900] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 900] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 900] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 900] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 901] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 901] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 902 attached
<unfinished ...>
[pid 902] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 900] <... clone resumed>, parent_tid=[902], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 902
[pid 902] <... set_robust_list resumed>) = 0
[pid 900] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 902] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 900] <... futex resumed>) = 0
[pid 900] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 902] <... umount2 resumed>) = 0
[pid 902] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 900] <... futex resumed>) = 0
[pid 902] <... futex resumed>) = 1
[pid 902] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 901] <... umount2 resumed>) = 0
[pid 901] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 901] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 900] exit_group(0) = ?
[pid 902] <... futex resumed>) = ?
[pid 901] <... futex resumed>) = ?
[pid 902] +++ exited with 0 +++
[pid 901] +++ exited with 0 +++
[pid 900] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=900, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 903
./strace-static-x86_64: Process 903 attached
[pid 903] set_robust_list(0x5555560865e0, 24) = 0
[pid 903] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 903] setpgid(0, 0) = 0
[pid 903] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 903] write(3, "1000", 4) = 4
[pid 903] close(3) = 0
[pid 903] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 903] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 903] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 903] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 904 attached
, parent_tid=[904], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 904
[pid 904] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 904] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 903] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 904] <... futex resumed>) = 0
[pid 904] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 904] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 904] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 903] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 903] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 904] <... futex resumed>) = 0
[pid 903] <... futex resumed>) = 1
[pid 904] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 903] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 904] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 904] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 903] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 903] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 904] <... futex resumed>) = 0
[pid 904] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 903] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 904] <... mount resumed>) = 0
[pid 904] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 904] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 903] <... futex resumed>) = 0
[pid 903] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 904] <... futex resumed>) = 0
[pid 904] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 903] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 904] <... umount2 resumed>) = 0
[pid 904] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 904] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 903] <... futex resumed>) = 0
[pid 903] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 903] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 903] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 905 attached
<unfinished ...>
[pid 905] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 903] <... clone resumed>, parent_tid=[905], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 905
[pid 905] <... set_robust_list resumed>) = 0
[pid 905] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 903] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 905] <... futex resumed>) = 0
[pid 905] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 903] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 905] <... umount2 resumed>) = 0
[pid 905] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 905] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 903] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 903] exit_group(0) = ?
[pid 904] <... futex resumed>) = ?
[pid 904] +++ exited with 0 +++
[pid 905] <... futex resumed>) = ?
[pid 905] +++ exited with 0 +++
[pid 903] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=903, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 906 attached
, child_tidptr=0x5555560865d0) = 906
[pid 906] set_robust_list(0x5555560865e0, 24) = 0
[pid 906] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 906] setpgid(0, 0) = 0
[pid 906] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 906] write(3, "1000", 4) = 4
[pid 906] close(3) = 0
[pid 906] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 906] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 906] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 906] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 907 attached
<unfinished ...>
[pid 907] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 906] <... clone resumed>, parent_tid=[907], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 907
[pid 907] <... set_robust_list resumed>) = 0
[pid 906] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 906] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 907] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 907] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 906] <... futex resumed>) = 0
[pid 907] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 906] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 906] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 907] <... mount resumed>) = 0
[pid 907] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 906] <... futex resumed>) = 0
[pid 907] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 906] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 906] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 907] <... mount resumed>) = 0
[pid 907] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 906] <... futex resumed>) = 0
[pid 906] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 906] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 906] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 906] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 906] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 908 attached
<unfinished ...>
[pid 907] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 906] <... clone resumed>, parent_tid=[908], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 908
[pid 906] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 906] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 908] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 907] <... umount2 resumed>) = 0
[pid 908] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 907] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 907] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 908] <... umount2 resumed>) = 0
[pid 908] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 906] <... futex resumed>) = 0
[pid 908] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 906] exit_group(0) = ?
[pid 908] <... futex resumed>) = ?
[pid 907] <... futex resumed>) = ?
[pid 907] +++ exited with 0 +++
[pid 908] +++ exited with 0 +++
[pid 906] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=906, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 909
./strace-static-x86_64: Process 909 attached
[pid 909] set_robust_list(0x5555560865e0, 24) = 0
[pid 909] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 909] setpgid(0, 0) = 0
[pid 909] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 909] write(3, "1000", 4) = 4
[pid 909] close(3) = 0
[pid 909] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 909] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 909] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 909] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 910 attached
, parent_tid=[910], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 910
[pid 909] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 909] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 910] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 910] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 910] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 909] <... futex resumed>) = 0
[pid 909] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 909] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 910] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 910] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 909] <... futex resumed>) = 0
[pid 909] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 909] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 910] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 910] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 909] <... futex resumed>) = 0
[pid 909] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 909] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 909] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 909] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 909] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 910] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 909] <... clone resumed>, parent_tid=[911], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 911
[pid 909] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 909] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 911 attached
<unfinished ...>
[pid 911] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 911] umount2("./file0", MNT_DETACH) = 0
[pid 911] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 909] <... futex resumed>) = 0
[pid 911] <... futex resumed>) = 1
[pid 911] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 910] <... umount2 resumed>) = 0
[pid 910] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 910] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 909] exit_group(0) = ?
[pid 911] <... futex resumed>) = ?
[pid 911] +++ exited with 0 +++
[pid 910] <... futex resumed>) = ? <unavailable>
[pid 910] +++ exited with 0 +++
[pid 909] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=909, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 912
./strace-static-x86_64: Process 912 attached
[pid 912] set_robust_list(0x5555560865e0, 24) = 0
[pid 912] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 912] setpgid(0, 0) = 0
[pid 912] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 912] write(3, "1000", 4) = 4
[pid 912] close(3) = 0
[pid 912] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 912] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 912] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 912] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[913], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 913
[pid 912] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 913 attached
) = 0
[pid 912] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 913] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 913] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 913] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 912] <... futex resumed>) = 0
[pid 913] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 912] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 912] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 913] <... mount resumed>) = 0
[pid 913] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 912] <... futex resumed>) = 0
[pid 912] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 912] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 913] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 913] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 912] <... futex resumed>) = 0
[pid 913] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 912] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 912] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 912] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 912] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 912] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 913] <... umount2 resumed>) = 0
[pid 912] <... clone resumed>, parent_tid=[914], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 914
[pid 912] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 912] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 914 attached
<unfinished ...>
[pid 914] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 914] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 913] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 913] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 914] <... umount2 resumed>) = 0
[pid 914] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 912] <... futex resumed>) = 0
[pid 912] exit_group(0) = ?
[pid 914] <... futex resumed>) = ?
[pid 913] <... futex resumed>) = ?
[pid 913] +++ exited with 0 +++
[pid 914] +++ exited with 0 +++
[pid 912] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=912, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 915
./strace-static-x86_64: Process 915 attached
[pid 915] set_robust_list(0x5555560865e0, 24) = 0
[pid 915] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 915] setpgid(0, 0) = 0
[pid 915] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 915] write(3, "1000", 4) = 4
[pid 915] close(3) = 0
[pid 915] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 915] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 915] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 915] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[916], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 916
[pid 915] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 915] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 916 attached
<unfinished ...>
[pid 916] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 916] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 916] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 915] <... futex resumed>) = 0
[pid 915] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 915] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 916] <... futex resumed>) = 1
[pid 916] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 916] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 915] <... futex resumed>) = 0
[pid 915] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 915] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 916] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 916] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 915] <... futex resumed>) = 0
[pid 916] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 915] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 915] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 915] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 915] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 915] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 917 attached
, parent_tid=[917], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 917
[pid 917] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 915] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 917] <... set_robust_list resumed>) = 0
[pid 915] <... futex resumed>) = 0
[pid 917] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 915] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 916] <... umount2 resumed>) = 0
[pid 917] <... umount2 resumed>) = 0
[pid 917] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 915] <... futex resumed>) = 0
[pid 917] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 916] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 916] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 915] exit_group(0) = ?
[pid 917] <... futex resumed>) = ?
[pid 916] <... futex resumed>) = ?
[pid 917] +++ exited with 0 +++
[pid 916] +++ exited with 0 +++
[pid 915] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=915, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 918
./strace-static-x86_64: Process 918 attached
[pid 918] set_robust_list(0x5555560865e0, 24) = 0
[pid 918] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 918] setpgid(0, 0) = 0
[pid 918] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 918] write(3, "1000", 4) = 4
[pid 918] close(3) = 0
[pid 918] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 918] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 918] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 918] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[919], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 919
./strace-static-x86_64: Process 919 attached
[pid 919] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 919] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 918] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 919] <... futex resumed>) = 0
[pid 919] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 918] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 919] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 919] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 918] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 918] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 919] <... futex resumed>) = 0
[pid 919] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 918] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 919] <... mount resumed>) = 0
[pid 919] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 919] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 918] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 918] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 919] <... futex resumed>) = 0
[pid 918] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 919] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 919] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 919] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 918] <... futex resumed>) = 0
[pid 918] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 919] <... futex resumed>) = 0
[pid 919] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 918] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 919] <... umount2 resumed>) = 0
[pid 919] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 919] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 918] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 918] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 918] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 920 attached
, parent_tid=[920], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 920
[pid 920] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 920] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 918] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 920] <... futex resumed>) = 0
[pid 920] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 918] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 920] <... umount2 resumed>) = 0
[pid 920] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 920] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 918] <... futex resumed>) = 0
[pid 918] exit_group(0 <unfinished ...>
[pid 919] <... futex resumed>) = ?
[pid 918] <... exit_group resumed>) = ?
[pid 919] +++ exited with 0 +++
[pid 920] <... futex resumed>) = ?
[pid 920] +++ exited with 0 +++
[pid 918] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=918, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 921
./strace-static-x86_64: Process 921 attached
[pid 921] set_robust_list(0x5555560865e0, 24) = 0
[pid 921] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 921] setpgid(0, 0) = 0
[pid 921] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 921] write(3, "1000", 4) = 4
[pid 921] close(3) = 0
[pid 921] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 921] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 921] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 921] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 922 attached
<unfinished ...>
[pid 922] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 922] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 921] <... clone resumed>, parent_tid=[922], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 922
[pid 921] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 922] <... futex resumed>) = 0
[pid 921] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 922] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 922] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 922] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 921] <... futex resumed>) = 0
[pid 921] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 922] <... futex resumed>) = 0
[pid 922] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 921] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 922] <... mount resumed>) = 0
[pid 922] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 922] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 921] <... futex resumed>) = 0
[pid 922] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 921] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 922] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 921] <... futex resumed>) = 0
[pid 921] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 922] <... mount resumed>) = 0
[pid 922] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 921] <... futex resumed>) = 0
[pid 921] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 921] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 921] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 921] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 921] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 922] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 921] <... clone resumed>, parent_tid=[923], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 923
[pid 921] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 922] <... umount2 resumed>) = 0
[pid 921] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 923 attached
<unfinished ...>
[pid 923] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 923] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 922] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 923] <... umount2 resumed>) = 0
[pid 923] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 921] <... futex resumed>) = 0
[pid 921] exit_group(0) = ?
[pid 922] <... futex resumed>) = ?
[pid 923] <... futex resumed>) = ?
[pid 922] +++ exited with 0 +++
[pid 923] +++ exited with 0 +++
[pid 921] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=921, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 924
./strace-static-x86_64: Process 924 attached
[pid 924] set_robust_list(0x5555560865e0, 24) = 0
[pid 924] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 924] setpgid(0, 0) = 0
[pid 924] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 924] write(3, "1000", 4) = 4
[pid 924] close(3) = 0
[pid 924] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 924] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 924] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 924] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[925], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 925
[pid 924] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 924] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 925 attached
<unfinished ...>
[pid 925] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 925] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 925] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 924] <... futex resumed>) = 0
[pid 925] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 924] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 925] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 924] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 925] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 925] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 924] <... futex resumed>) = 0
[pid 925] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 924] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 924] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 925] <... mount resumed>) = 0
[pid 925] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 924] <... futex resumed>) = 0
[pid 924] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 925] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 924] <... futex resumed>) = 0
[pid 924] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 924] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 924] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 925] <... umount2 resumed>) = 0
[pid 925] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 924] <... mprotect resumed>) = 0
[pid 924] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 925] <... futex resumed>) = 0
./strace-static-x86_64: Process 926 attached
[pid 925] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 926] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 924] <... clone resumed>, parent_tid=[926], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 926
[pid 926] <... set_robust_list resumed>) = 0
[pid 924] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 926] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 924] <... futex resumed>) = 0
[pid 924] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 926] <... umount2 resumed>) = 0
[pid 926] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 926] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 924] <... futex resumed>) = 0
[pid 924] exit_group(0) = ?
[pid 925] <... futex resumed>) = ?
[pid 925] +++ exited with 0 +++
[pid 926] <... futex resumed>) = ?
[pid 926] +++ exited with 0 +++
[pid 924] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=924, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 927
./strace-static-x86_64: Process 927 attached
[pid 927] set_robust_list(0x5555560865e0, 24) = 0
[pid 927] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 927] setpgid(0, 0) = 0
[pid 927] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 927] write(3, "1000", 4) = 4
[pid 927] close(3) = 0
[pid 927] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 927] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 927] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 927] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 928 attached
, parent_tid=[928], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 928
[pid 927] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 927] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 928] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 928] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 928] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 927] <... futex resumed>) = 0
[pid 927] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 927] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 928] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 928] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 927] <... futex resumed>) = 0
[pid 927] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 927] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 928] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 928] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 927] <... futex resumed>) = 0
[pid 927] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 927] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 927] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 927] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 928] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 927] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 928] <... umount2 resumed>) = 0
[pid 928] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 927] <... clone resumed>, parent_tid=[929], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 929
./strace-static-x86_64: Process 929 attached
[pid 927] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 927] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 929] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 928] <... futex resumed>) = 0
[pid 929] <... set_robust_list resumed>) = 0
[pid 928] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 929] umount2("./file0", MNT_DETACH) = 0
[pid 929] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 927] <... futex resumed>) = 0
[pid 927] exit_group(0) = ?
[pid 928] <... futex resumed>) = ?
[pid 928] +++ exited with 0 +++
[pid 929] +++ exited with 0 +++
[pid 927] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=927, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 930
./strace-static-x86_64: Process 930 attached
[pid 930] set_robust_list(0x5555560865e0, 24) = 0
[pid 930] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 930] setpgid(0, 0) = 0
[pid 930] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 930] write(3, "1000", 4) = 4
[pid 930] close(3) = 0
[pid 930] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 930] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 930] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 930] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 931 attached
, parent_tid=[931], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 931
[pid 931] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 931] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 930] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 931] <... futex resumed>) = 0
[pid 930] <... futex resumed>) = 1
[pid 931] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 930] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 931] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 931] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 930] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 930] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 931] <... futex resumed>) = 0
[pid 931] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 930] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 931] <... mount resumed>) = 0
[pid 931] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 931] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 930] <... futex resumed>) = 0
[pid 930] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 931] <... futex resumed>) = 0
[pid 931] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 930] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 931] <... mount resumed>) = 0
[pid 931] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 931] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 930] <... futex resumed>) = 0
[pid 930] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 931] <... futex resumed>) = 0
[pid 930] <... futex resumed>) = 1
[pid 931] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 930] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 931] <... umount2 resumed>) = 0
[pid 930] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 931] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 931] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 930] <... mmap resumed>) = 0x7f236e446000
[pid 930] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 930] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 932 attached
, parent_tid=[932], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 932
[pid 932] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 932] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 930] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 932] <... futex resumed>) = 0
[pid 932] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 930] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 932] <... umount2 resumed>) = 0
[pid 932] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 930] <... futex resumed>) = 0
[pid 930] exit_group(0 <unfinished ...>
[pid 931] <... futex resumed>) = ?
[pid 931] +++ exited with 0 +++
[pid 930] <... exit_group resumed>) = ?
[pid 932] +++ exited with 0 +++
[pid 930] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=930, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 933
./strace-static-x86_64: Process 933 attached
[pid 933] set_robust_list(0x5555560865e0, 24) = 0
[pid 933] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 933] setpgid(0, 0) = 0
[pid 933] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 933] write(3, "1000", 4) = 4
[pid 933] close(3) = 0
[pid 933] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 933] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 933] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 933] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 934 attached
, parent_tid=[934], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 934
[pid 934] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 934] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 933] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 934] <... futex resumed>) = 0
[pid 934] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 934] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 933] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 934] <... futex resumed>) = 0
[pid 934] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 933] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 933] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 934] <... futex resumed>) = 0
[pid 933] <... futex resumed>) = 1
[pid 934] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 933] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 934] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 934] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 933] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 933] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 934] <... futex resumed>) = 0
[pid 933] <... futex resumed>) = 1
[pid 934] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 933] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 934] <... mount resumed>) = 0
[pid 934] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 933] <... futex resumed>) = 0
[pid 934] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 933] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 934] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 933] <... futex resumed>) = 0
[pid 934] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 933] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 933] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 933] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 933] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[935], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 935
[pid 934] <... umount2 resumed>) = 0
[pid 933] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 934] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 933] <... futex resumed>) = 0
[pid 934] <... futex resumed>) = 0
[pid 934] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 935 attached
<unfinished ...>
[pid 933] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 935] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 935] umount2("./file0", MNT_DETACH) = 0
[pid 935] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 933] <... futex resumed>) = 0
[pid 935] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 933] exit_group(0) = ?
[pid 934] <... futex resumed>) = ?
[pid 934] +++ exited with 0 +++
[pid 935] <... futex resumed>) = ?
[pid 935] +++ exited with 0 +++
[pid 933] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=933, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 936
./strace-static-x86_64: Process 936 attached
[pid 936] set_robust_list(0x5555560865e0, 24) = 0
[pid 936] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 936] setpgid(0, 0) = 0
[pid 936] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 936] write(3, "1000", 4) = 4
[pid 936] close(3) = 0
[pid 936] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 936] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 936] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 936] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 937 attached
, parent_tid=[937], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 937
[pid 937] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 937] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 936] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 937] <... futex resumed>) = 0
[pid 937] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 937] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 937] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 936] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 936] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 937] <... futex resumed>) = 0
[pid 937] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 936] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 937] <... mount resumed>) = 0
[pid 937] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 936] <... futex resumed>) = 0
[pid 936] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 936] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 937] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 937] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 936] <... futex resumed>) = 0
[pid 936] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 937] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 936] <... futex resumed>) = 0
[pid 936] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 936] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 936] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 936] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 937] <... umount2 resumed>) = 0
[pid 936] <... clone resumed>, parent_tid=[938], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 938
[pid 936] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 936] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 938 attached
<unfinished ...>
[pid 938] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 937] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 938] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 937] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 938] <... umount2 resumed>) = 0
[pid 938] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 936] <... futex resumed>) = 0
[pid 936] exit_group(0) = ?
[pid 937] <... futex resumed>) = ?
[pid 937] +++ exited with 0 +++
[pid 938] <... futex resumed>) = ?
[pid 938] +++ exited with 0 +++
[pid 936] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=936, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 939
./strace-static-x86_64: Process 939 attached
[pid 939] set_robust_list(0x5555560865e0, 24) = 0
[pid 939] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 939] setpgid(0, 0) = 0
[pid 939] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 939] write(3, "1000", 4) = 4
[pid 939] close(3) = 0
[pid 939] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 939] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 939] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 939] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[940], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 940
[pid 939] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 939] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 940 attached
<unfinished ...>
[pid 940] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 940] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 940] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 939] <... futex resumed>) = 0
[pid 939] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 939] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 940] <... futex resumed>) = 1
[pid 940] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 940] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 939] <... futex resumed>) = 0
[pid 940] <... futex resumed>) = 1
[pid 939] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 940] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 939] <... futex resumed>) = 0
[pid 939] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 940] <... mount resumed>) = 0
[pid 940] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 939] <... futex resumed>) = 0
[pid 940] <... futex resumed>) = 1
[pid 939] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 940] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 939] <... futex resumed>) = 0
[pid 939] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 939] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 939] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 939] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 940] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 941 attached
[pid 940] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 939] <... clone resumed>, parent_tid=[941], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 941
[pid 941] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 940] <... futex resumed>) = 0
[pid 939] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 941] <... set_robust_list resumed>) = 0
[pid 940] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 939] <... futex resumed>) = 0
[pid 941] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 939] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 941] <... umount2 resumed>) = 0
[pid 941] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 939] <... futex resumed>) = 0
[pid 941] <... futex resumed>) = 1
[pid 939] exit_group(0 <unfinished ...>
[pid 941] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 939] <... exit_group resumed>) = ?
[pid 940] <... futex resumed>) = ?
[pid 940] +++ exited with 0 +++
[pid 941] <... futex resumed>) = ?
[pid 941] +++ exited with 0 +++
[pid 939] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=939, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 942
./strace-static-x86_64: Process 942 attached
[pid 942] set_robust_list(0x5555560865e0, 24) = 0
[pid 942] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 942] setpgid(0, 0) = 0
[pid 942] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 942] write(3, "1000", 4) = 4
[pid 942] close(3) = 0
[pid 942] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 942] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 942] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 942] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 943 attached
, parent_tid=[943], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 943
[pid 942] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 943] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 942] <... futex resumed>) = 0
[pid 943] <... set_robust_list resumed>) = 0
[pid 942] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 943] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 943] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 942] <... futex resumed>) = 0
[pid 943] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 942] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 943] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 942] <... futex resumed>) = 0
[pid 943] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 942] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 943] <... mount resumed>) = 0
[pid 943] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 942] <... futex resumed>) = 0
[pid 942] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 942] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 943] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 943] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 942] <... futex resumed>) = 0
[pid 942] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 943] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 942] <... futex resumed>) = 0
[pid 942] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 942] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 943] <... umount2 resumed>) = 0
[pid 942] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 942] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[944], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 944
[pid 942] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 943] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 942] <... futex resumed>) = 0
[pid 942] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 944 attached
<unfinished ...>
[pid 944] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 944] umount2("./file0", MNT_DETACH) = 0
[pid 943] <... futex resumed>) = 0
[pid 944] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 943] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 942] <... futex resumed>) = 0
[pid 942] exit_group(0) = ?
[pid 944] <... futex resumed>) = ?
[pid 944] +++ exited with 0 +++
[pid 943] <... futex resumed>) = ?
[pid 943] +++ exited with 0 +++
[pid 942] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=942, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 945
./strace-static-x86_64: Process 945 attached
[pid 945] set_robust_list(0x5555560865e0, 24) = 0
[pid 945] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 945] setpgid(0, 0) = 0
[pid 945] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 945] write(3, "1000", 4) = 4
[pid 945] close(3) = 0
[pid 945] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 945] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 945] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 945] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 946 attached
, parent_tid=[946], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 946
[pid 946] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 945] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 946] <... set_robust_list resumed>) = 0
[pid 945] <... futex resumed>) = 0
[pid 945] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 946] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 946] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 945] <... futex resumed>) = 0
[pid 946] <... futex resumed>) = 1
[pid 945] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 945] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 946] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 946] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 945] <... futex resumed>) = 0
[pid 945] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 945] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 946] <... futex resumed>) = 1
[pid 946] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 946] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 945] <... futex resumed>) = 0
[pid 945] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 945] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 945] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 945] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 946] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 945] <... mprotect resumed>) = 0
[pid 945] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 946] <... umount2 resumed>) = 0
[pid 946] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 945] <... clone resumed>, parent_tid=[947], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 947
[pid 945] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 945] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 947 attached
<unfinished ...>
[pid 946] <... futex resumed>) = 0
[pid 947] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 946] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 947] <... set_robust_list resumed>) = 0
[pid 947] umount2("./file0", MNT_DETACH) = 0
[pid 947] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 945] <... futex resumed>) = 0
[pid 947] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 945] exit_group(0 <unfinished ...>
[pid 947] <... futex resumed>) = 231
[pid 945] <... exit_group resumed>) = ?
[pid 946] <... futex resumed>) = ?
[pid 946] +++ exited with 0 +++
[pid 947] +++ exited with 0 +++
[pid 945] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=945, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 948
./strace-static-x86_64: Process 948 attached
[pid 948] set_robust_list(0x5555560865e0, 24) = 0
[pid 948] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 948] setpgid(0, 0) = 0
[pid 948] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 948] write(3, "1000", 4) = 4
[pid 948] close(3) = 0
[pid 948] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 948] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 948] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 948] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 949 attached
<unfinished ...>
[pid 949] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 949] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 948] <... clone resumed>, parent_tid=[949], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 949
[pid 948] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 949] <... futex resumed>) = 0
[pid 948] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 949] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 949] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 949] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 948] <... futex resumed>) = 0
[pid 948] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 949] <... futex resumed>) = 0
[pid 949] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 948] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 949] <... mount resumed>) = 0
[pid 949] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 949] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 948] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 948] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 949] <... futex resumed>) = 0
[pid 949] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 948] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 949] <... mount resumed>) = 0
[pid 949] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 949] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 948] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 948] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 949] <... futex resumed>) = 0
[pid 949] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 948] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 949] <... umount2 resumed>) = 0
[pid 949] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 949] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 948] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 948] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 948] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 950 attached
, parent_tid=[950], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 950
[pid 950] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 948] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 950] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 948] <... futex resumed>) = 0
[pid 948] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 950] <... umount2 resumed>) = 0
[pid 950] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 950] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 948] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 948] exit_group(0 <unfinished ...>
[pid 949] <... futex resumed>) = ?
[pid 948] <... exit_group resumed>) = ?
[pid 949] +++ exited with 0 +++
[pid 950] <... futex resumed>) = ?
[pid 950] +++ exited with 0 +++
[pid 948] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=948, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 951
./strace-static-x86_64: Process 951 attached
[pid 951] set_robust_list(0x5555560865e0, 24) = 0
[pid 951] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 951] setpgid(0, 0) = 0
[pid 951] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 951] write(3, "1000", 4) = 4
[pid 951] close(3) = 0
[pid 951] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 951] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 951] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 951] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[952], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 952
[pid 951] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 951] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 952 attached
<unfinished ...>
[pid 952] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 952] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 952] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 951] <... futex resumed>) = 0
[pid 951] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 951] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 952] <... futex resumed>) = 1
[pid 952] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 952] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 951] <... futex resumed>) = 0
[pid 951] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 951] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 952] <... futex resumed>) = 1
[pid 952] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 952] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 951] <... futex resumed>) = 0
[pid 952] <... futex resumed>) = 1
[pid 951] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 952] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 951] <... futex resumed>) = 0
[pid 951] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 951] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 951] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 952] <... umount2 resumed>) = 0
[pid 952] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 951] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 952] <... futex resumed>) = 0
[pid 952] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 953 attached
<unfinished ...>
[pid 951] <... clone resumed>, parent_tid=[953], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 953
[pid 953] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 951] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 953] <... set_robust_list resumed>) = 0
[pid 951] <... futex resumed>) = 0
[pid 953] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 951] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 953] <... umount2 resumed>) = 0
[pid 953] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 951] <... futex resumed>) = 0
[pid 951] exit_group(0 <unfinished ...>
[pid 953] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 951] <... exit_group resumed>) = ?
[pid 952] <... futex resumed>) = ?
[pid 953] <... futex resumed>) = ?
[pid 952] +++ exited with 0 +++
[pid 953] +++ exited with 0 +++
[pid 951] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=951, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 954 attached
, child_tidptr=0x5555560865d0) = 954
[pid 954] set_robust_list(0x5555560865e0, 24) = 0
[pid 954] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 954] setpgid(0, 0) = 0
[pid 954] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 954] write(3, "1000", 4) = 4
[pid 954] close(3) = 0
[pid 954] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 954] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 954] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 954] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 955 attached
<unfinished ...>
[pid 955] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 954] <... clone resumed>, parent_tid=[955], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 955
[pid 954] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 954] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 955] <... set_robust_list resumed>) = 0
[pid 955] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 955] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 954] <... futex resumed>) = 0
[pid 954] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 954] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 955] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 955] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 954] <... futex resumed>) = 0
[pid 954] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 954] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 955] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 955] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 955] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 954] <... futex resumed>) = 0
[pid 954] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 954] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 954] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 955] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 955] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 954] <... mmap resumed>) = 0x7f236e446000
[pid 954] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 954] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 956 attached
<unfinished ...>
[pid 955] <... umount2 resumed>) = 0
[pid 954] <... clone resumed>, parent_tid=[956], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 956
[pid 954] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 954] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 956] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 955] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 956] <... set_robust_list resumed>) = 0
[pid 955] <... futex resumed>) = 0
[pid 956] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 955] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 956] <... umount2 resumed>) = 0
[pid 956] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 954] <... futex resumed>) = 0
[pid 954] exit_group(0) = ?
[pid 955] <... futex resumed>) = ?
[pid 955] +++ exited with 0 +++
[pid 956] +++ exited with 0 +++
[pid 954] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=954, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 957
./strace-static-x86_64: Process 957 attached
[pid 957] set_robust_list(0x5555560865e0, 24) = 0
[pid 957] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 957] setpgid(0, 0) = 0
[pid 957] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 957] write(3, "1000", 4) = 4
[pid 957] close(3) = 0
[pid 957] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 957] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 957] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 957] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 958 attached
, parent_tid=[958], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 958
[pid 958] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 958] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 957] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 958] <... futex resumed>) = 0
[pid 958] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 957] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 958] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 958] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 957] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 957] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 958] <... futex resumed>) = 0
[pid 958] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 958] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 958] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 957] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 957] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 958] <... futex resumed>) = 0
[pid 958] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 957] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 958] <... mount resumed>) = 0
[pid 958] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 958] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 957] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 957] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 958] <... futex resumed>) = 0
[pid 957] <... futex resumed>) = 1
[pid 958] umount2("./file0", MNT_DETACH) = 0
[pid 958] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 957] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 958] <... futex resumed>) = 0
[pid 958] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 957] <... futex resumed>) = 0
[pid 957] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 958] <... umount2 resumed>) = 0
[pid 958] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 958] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 957] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 957] exit_group(0) = ?
[pid 958] <... futex resumed>) = ?
[pid 958] +++ exited with 0 +++
[pid 957] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=957, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 959
./strace-static-x86_64: Process 959 attached
[pid 959] set_robust_list(0x5555560865e0, 24) = 0
[pid 959] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 959] setpgid(0, 0) = 0
[pid 959] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 959] write(3, "1000", 4) = 4
[pid 959] close(3) = 0
[pid 959] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 959] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 959] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 959] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 960 attached
, parent_tid=[960], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 960
[pid 960] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 959] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 960] <... set_robust_list resumed>) = 0
[pid 959] <... futex resumed>) = 0
[pid 959] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 960] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 960] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 959] <... futex resumed>) = 0
[pid 960] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 959] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 960] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 959] <... futex resumed>) = 0
[pid 960] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 959] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 960] <... mount resumed>) = 0
[pid 960] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 959] <... futex resumed>) = 0
[pid 960] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 959] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 960] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 959] <... futex resumed>) = 0
[pid 960] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 959] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 960] <... mount resumed>) = 0
[pid 960] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 959] <... futex resumed>) = 0
[pid 960] <... futex resumed>) = 1
[pid 959] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 960] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 959] <... futex resumed>) = 0
[pid 959] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 959] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 959] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 959] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[961], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 961
./strace-static-x86_64: Process 961 attached
[pid 960] <... umount2 resumed>) = 0
[pid 959] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 961] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 960] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 959] <... futex resumed>) = 0
[pid 961] <... set_robust_list resumed>) = 0
[pid 960] <... futex resumed>) = 0
[pid 959] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 961] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 960] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 961] <... umount2 resumed>) = 0
[pid 961] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 959] <... futex resumed>) = 0
[pid 961] <... futex resumed>) = 1
[pid 959] exit_group(0 <unfinished ...>
[pid 961] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 959] <... exit_group resumed>) = ?
[pid 961] <... futex resumed>) = ?
[pid 960] <... futex resumed>) = ?
[pid 960] +++ exited with 0 +++
[pid 961] +++ exited with 0 +++
[pid 959] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=959, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 962
./strace-static-x86_64: Process 962 attached
[pid 962] set_robust_list(0x5555560865e0, 24) = 0
[pid 962] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 962] setpgid(0, 0) = 0
[pid 962] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 962] write(3, "1000", 4) = 4
[pid 962] close(3) = 0
[pid 962] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 962] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 962] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 962] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 963 attached
, parent_tid=[963], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 963
[pid 963] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 963] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 962] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 963] <... futex resumed>) = 0
[pid 963] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 963] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 963] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 962] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 962] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 963] <... futex resumed>) = 0
[pid 963] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 962] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 963] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 963] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 962] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 962] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 963] <... futex resumed>) = 0
[pid 963] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 962] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 963] <... mount resumed>) = 0
[pid 963] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 963] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 962] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 962] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 963] <... futex resumed>) = 0
[pid 963] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 962] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 963] <... umount2 resumed>) = 0
[pid 963] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 963] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 962] <... futex resumed>) = 0
[pid 962] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 962] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 962] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 964 attached
, parent_tid=[964], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 964
[pid 964] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 964] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 962] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 964] <... futex resumed>) = 0
[pid 964] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 962] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 964] <... umount2 resumed>) = 0
[pid 964] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 964] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 962] <... futex resumed>) = 0
[pid 962] exit_group(0 <unfinished ...>
[pid 963] <... futex resumed>) = ?
[pid 962] <... exit_group resumed>) = ?
[pid 963] +++ exited with 0 +++
[pid 964] <... futex resumed>) = ?
[pid 964] +++ exited with 0 +++
[pid 962] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=962, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 965
./strace-static-x86_64: Process 965 attached
[pid 965] set_robust_list(0x5555560865e0, 24) = 0
[pid 965] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 965] setpgid(0, 0) = 0
[pid 965] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 965] write(3, "1000", 4) = 4
[pid 965] close(3) = 0
[pid 965] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 965] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 965] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 965] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 966 attached
, parent_tid=[966], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 966
[pid 966] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 965] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 965] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 966] <... set_robust_list resumed>) = 0
[pid 966] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 966] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 965] <... futex resumed>) = 0
[pid 965] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 965] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 966] <... futex resumed>) = 1
[pid 966] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 966] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 965] <... futex resumed>) = 0
[pid 965] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 965] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 966] <... futex resumed>) = 1
[pid 966] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 966] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 965] <... futex resumed>) = 0
[pid 965] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 965] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 965] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 965] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 965] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[967], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 967
[pid 965] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 965] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 966] <... futex resumed>) = 1
[pid 966] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 967 attached
) = 0
[pid 966] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 966] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 967] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 967] umount2("./file0", MNT_DETACH) = 0
[pid 967] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 965] <... futex resumed>) = 0
[pid 965] exit_group(0) = ?
[pid 966] <... futex resumed>) = ?
[pid 966] +++ exited with 0 +++
[pid 967] +++ exited with 0 +++
[pid 965] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=965, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 968
./strace-static-x86_64: Process 968 attached
[pid 968] set_robust_list(0x5555560865e0, 24) = 0
[pid 968] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 968] setpgid(0, 0) = 0
[pid 968] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 968] write(3, "1000", 4) = 4
[pid 968] close(3) = 0
[pid 968] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 968] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 968] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 968] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 969 attached
, parent_tid=[969], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 969
[pid 969] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 968] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 969] <... set_robust_list resumed>) = 0
[pid 968] <... futex resumed>) = 0
[pid 968] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 969] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 969] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 968] <... futex resumed>) = 0
[pid 969] <... futex resumed>) = 1
[pid 968] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 969] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 968] <... futex resumed>) = 0
[pid 968] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 969] <... mount resumed>) = 0
[pid 969] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 968] <... futex resumed>) = 0
[pid 969] <... futex resumed>) = 1
[pid 968] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 969] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 968] <... futex resumed>) = 0
[pid 968] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 969] <... mount resumed>) = 0
[pid 969] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 968] <... futex resumed>) = 0
[pid 969] <... futex resumed>) = 1
[pid 968] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 969] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 968] <... futex resumed>) = 0
[pid 968] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 969] <... umount2 resumed>) = 0
[pid 968] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 969] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 968] <... mmap resumed>) = 0x7f236e446000
[pid 969] <... futex resumed>) = 0
[pid 968] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 969] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 968] <... mprotect resumed>) = 0
[pid 968] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 970 attached
, parent_tid=[970], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 970
[pid 970] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 968] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 970] <... set_robust_list resumed>) = 0
[pid 968] <... futex resumed>) = 0
[pid 970] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 968] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 970] <... umount2 resumed>) = 0
[pid 970] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 968] <... futex resumed>) = 0
[pid 970] <... futex resumed>) = 1
[pid 970] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 968] exit_group(0) = ?
[pid 970] <... futex resumed>) = ?
[pid 969] <... futex resumed>) = ?
[pid 969] +++ exited with 0 +++
[pid 970] +++ exited with 0 +++
[pid 968] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=968, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 971
./strace-static-x86_64: Process 971 attached
[pid 971] set_robust_list(0x5555560865e0, 24) = 0
[pid 971] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 971] setpgid(0, 0) = 0
[pid 971] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 971] write(3, "1000", 4) = 4
[pid 971] close(3) = 0
[pid 971] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 971] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 971] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 971] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 972 attached
, parent_tid=[972], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 972
[pid 972] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 972] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 971] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 972] <... futex resumed>) = 0
[pid 972] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 972] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 972] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 971] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 971] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 972] <... futex resumed>) = 0
[pid 972] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 971] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 972] <... mount resumed>) = 0
[pid 972] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 972] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 971] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 971] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 972] <... futex resumed>) = 0
[pid 972] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 971] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 972] <... mount resumed>) = 0
[pid 972] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 971] <... futex resumed>) = 0
[pid 972] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 971] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 972] <... futex resumed>) = 0
[pid 972] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 971] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 972] <... umount2 resumed>) = 0
[pid 972] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 972] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 971] <... futex resumed>) = 0
[pid 971] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 971] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 971] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 973 attached
<unfinished ...>
[pid 973] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 973] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 971] <... clone resumed>, parent_tid=[973], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 973
[pid 971] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 973] <... futex resumed>) = 0
[pid 973] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 971] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 973] <... umount2 resumed>) = 0
[pid 973] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 971] <... futex resumed>) = 0
[pid 971] exit_group(0) = ?
[pid 972] <... futex resumed>) = ?
[pid 972] +++ exited with 0 +++
[pid 973] +++ exited with 0 +++
[pid 971] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=971, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 974 attached
, child_tidptr=0x5555560865d0) = 974
[pid 974] set_robust_list(0x5555560865e0, 24) = 0
[pid 974] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 974] setpgid(0, 0) = 0
[pid 974] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 974] write(3, "1000", 4) = 4
[pid 974] close(3) = 0
[pid 974] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 974] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 974] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 974] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 975 attached
, parent_tid=[975], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 975
[pid 975] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 975] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 974] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 975] <... futex resumed>) = 0
[pid 975] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 974] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 975] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 975] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 974] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 974] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 975] <... futex resumed>) = 0
[pid 974] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 975] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 975] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 975] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 974] <... futex resumed>) = 0
[pid 974] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 975] <... futex resumed>) = 0
[pid 974] <... futex resumed>) = 1
[pid 975] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 974] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 975] <... mount resumed>) = 0
[pid 975] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 975] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 974] <... futex resumed>) = 0
[pid 974] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 975] <... futex resumed>) = 0
[pid 975] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 974] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 975] <... umount2 resumed>) = 0
[pid 974] <... futex resumed>) = 0
[pid 975] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 975] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 974] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 974] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 974] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 976 attached
, parent_tid=[976], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 976
[pid 976] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 976] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 974] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 976] <... futex resumed>) = 0
[pid 976] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 974] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 976] <... umount2 resumed>) = 0
[pid 976] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 976] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 974] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 974] exit_group(0 <unfinished ...>
[pid 975] <... futex resumed>) = ?
[pid 974] <... exit_group resumed>) = ?
[pid 975] +++ exited with 0 +++
[pid 976] <... futex resumed>) = ?
[pid 976] +++ exited with 0 +++
[pid 974] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=974, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 977
./strace-static-x86_64: Process 977 attached
[pid 977] set_robust_list(0x5555560865e0, 24) = 0
[pid 977] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 977] setpgid(0, 0) = 0
[pid 977] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 977] write(3, "1000", 4) = 4
[pid 977] close(3) = 0
[pid 977] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 977] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 977] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 977] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 978 attached
, parent_tid=[978], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 978
[pid 978] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 977] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 978] <... set_robust_list resumed>) = 0
[pid 977] <... futex resumed>) = 0
[pid 977] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 978] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 978] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 977] <... futex resumed>) = 0
[pid 978] <... futex resumed>) = 1
[pid 977] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 978] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 977] <... futex resumed>) = 0
[pid 977] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 978] <... mount resumed>) = 0
[pid 978] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 977] <... futex resumed>) = 0
[pid 978] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 977] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 978] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 977] <... futex resumed>) = 0
[pid 978] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 977] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 978] <... mount resumed>) = 0
[pid 978] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 977] <... futex resumed>) = 0
[pid 977] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 977] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 977] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 977] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 977] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 978] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 977] <... clone resumed>, parent_tid=[979], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 979
[pid 977] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 977] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 979 attached
<unfinished ...>
[pid 978] <... umount2 resumed>) = 0
[pid 979] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 979] umount2("./file0", MNT_DETACH) = 0
[pid 978] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 979] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 978] <... futex resumed>) = 0
[pid 977] <... futex resumed>) = 0
[pid 977] exit_group(0) = ?
[pid 979] <... futex resumed>) = ?
[pid 979] +++ exited with 0 +++
[pid 978] +++ exited with 0 +++
[pid 977] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=977, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 980 attached
, child_tidptr=0x5555560865d0) = 980
[pid 980] set_robust_list(0x5555560865e0, 24) = 0
[pid 980] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 980] setpgid(0, 0) = 0
[pid 980] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 980] write(3, "1000", 4) = 4
[pid 980] close(3) = 0
[pid 980] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 980] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 980] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 980] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[981], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 981
[pid 980] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 980] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 981 attached
<unfinished ...>
[pid 981] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 981] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 981] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 980] <... futex resumed>) = 0
[pid 980] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 980] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 981] <... futex resumed>) = 1
[pid 981] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 981] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 980] <... futex resumed>) = 0
[pid 980] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 980] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 981] <... futex resumed>) = 1
[pid 981] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 981] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 980] <... futex resumed>) = 0
[pid 981] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 980] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 980] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 980] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 981] <... umount2 resumed>) = 0
[pid 980] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 981] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 980] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 981] <... futex resumed>) = 0
./strace-static-x86_64: Process 982 attached
[pid 981] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 980] <... clone resumed>, parent_tid=[982], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 982
[pid 982] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 980] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 982] <... set_robust_list resumed>) = 0
[pid 980] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 982] umount2("./file0", MNT_DETACH) = 0
[pid 982] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 980] <... futex resumed>) = 0
[pid 980] exit_group(0) = ?
[pid 981] <... futex resumed>) = ?
[pid 981] +++ exited with 0 +++
[pid 982] +++ exited with 0 +++
[pid 980] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=980, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 983
./strace-static-x86_64: Process 983 attached
[pid 983] set_robust_list(0x5555560865e0, 24) = 0
[pid 983] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 983] setpgid(0, 0) = 0
[pid 983] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 983] write(3, "1000", 4) = 4
[pid 983] close(3) = 0
[pid 983] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 983] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 983] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 983] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 984 attached
, parent_tid=[984], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 984
[pid 984] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 983] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 984] <... set_robust_list resumed>) = 0
[pid 983] <... futex resumed>) = 0
[pid 983] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 984] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 984] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 983] <... futex resumed>) = 0
[pid 984] <... futex resumed>) = 1
[pid 983] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 984] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 983] <... futex resumed>) = 0
[pid 983] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 984] <... mount resumed>) = 0
[pid 984] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 983] <... futex resumed>) = 0
[pid 984] <... futex resumed>) = 1
[pid 983] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 984] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 983] <... futex resumed>) = 0
[pid 983] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 984] <... mount resumed>) = 0
[pid 984] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 983] <... futex resumed>) = 0
[pid 983] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 983] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 983] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 983] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 984] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 983] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[985], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 985
[pid 983] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 984] <... umount2 resumed>) = 0
[pid 983] <... futex resumed>) = 0
[pid 983] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 985 attached
<unfinished ...>
[pid 985] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 985] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 984] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 985] <... umount2 resumed>) = 0
[pid 985] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 983] <... futex resumed>) = 0
[pid 983] exit_group(0) = ?
[pid 984] <... futex resumed>) = ?
[pid 985] <... futex resumed>) = ?
[pid 984] +++ exited with 0 +++
[pid 985] +++ exited with 0 +++
[pid 983] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=983, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 986
./strace-static-x86_64: Process 986 attached
[pid 986] set_robust_list(0x5555560865e0, 24) = 0
[pid 986] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 986] setpgid(0, 0) = 0
[pid 986] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 986] write(3, "1000", 4) = 4
[pid 986] close(3) = 0
[pid 986] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 986] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 986] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 986] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 987 attached
<unfinished ...>
[pid 987] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 986] <... clone resumed>, parent_tid=[987], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 987
[pid 987] <... set_robust_list resumed>) = 0
[pid 987] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 986] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 987] <... futex resumed>) = 0
[pid 987] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 987] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 986] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 987] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 986] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 986] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 987] <... futex resumed>) = 0
[pid 987] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 986] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 987] <... mount resumed>) = 0
[pid 987] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 986] <... futex resumed>) = 0
[pid 987] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 986] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 987] <... futex resumed>) = 0
[pid 986] <... futex resumed>) = 1
[pid 987] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 986] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 987] <... mount resumed>) = 0
[pid 987] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 986] <... futex resumed>) = 0
[pid 987] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 986] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 987] <... futex resumed>) = 0
[pid 986] <... futex resumed>) = 1
[pid 987] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 986] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 986] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 986] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 986] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[988], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 988
[pid 986] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 986] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 987] <... umount2 resumed>) = 0
[pid 987] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 987] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 988 attached
<unfinished ...>
[pid 988] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 988] umount2("./file0", MNT_DETACH) = 0
[pid 988] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 986] <... futex resumed>) = 0
[pid 988] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 986] exit_group(0) = ?
[pid 987] <... futex resumed>) = 231
[pid 988] <... futex resumed>) = ?
[pid 987] +++ exited with 0 +++
[pid 988] +++ exited with 0 +++
[pid 986] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=986, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 989
./strace-static-x86_64: Process 989 attached
[pid 989] set_robust_list(0x5555560865e0, 24) = 0
[pid 989] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 989] setpgid(0, 0) = 0
[pid 989] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 989] write(3, "1000", 4) = 4
[pid 989] close(3) = 0
[pid 989] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 989] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 989] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 989] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 990 attached
, parent_tid=[990], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 990
[pid 990] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 990] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 989] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 990] <... futex resumed>) = 0
[pid 990] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 990] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 990] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 989] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 989] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 990] <... futex resumed>) = 0
[pid 990] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 990] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 990] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 989] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 989] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 990] <... futex resumed>) = 0
[pid 990] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 989] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 990] <... mount resumed>) = 0
[pid 990] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 989] <... futex resumed>) = 0
[pid 989] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 989] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 989] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 990] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 989] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 989] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[991], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 991
[pid 990] <... umount2 resumed>) = 0
[pid 989] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 989] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 991 attached
<unfinished ...>
[pid 991] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 991] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 990] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 990] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 991] <... umount2 resumed>) = 0
[pid 991] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 989] <... futex resumed>) = 0
[pid 989] exit_group(0) = ?
[pid 991] <... futex resumed>) = ?
[pid 991] +++ exited with 0 +++
[pid 990] <... futex resumed>) = ?
[pid 990] +++ exited with 0 +++
[pid 989] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=989, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 992 attached
, child_tidptr=0x5555560865d0) = 992
[pid 992] set_robust_list(0x5555560865e0, 24) = 0
[pid 992] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 992] setpgid(0, 0) = 0
[pid 992] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 992] write(3, "1000", 4) = 4
[pid 992] close(3) = 0
[pid 992] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 992] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 992] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 992] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 993 attached
, parent_tid=[993], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 993
[pid 993] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 993] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 992] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 993] <... futex resumed>) = 0
[pid 993] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 993] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 992] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 993] <... futex resumed>) = 0
[pid 993] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 992] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 992] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 993] <... futex resumed>) = 0
[pid 993] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 992] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 993] <... mount resumed>) = 0
[pid 993] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 993] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 992] <... futex resumed>) = 0
[pid 992] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 993] <... futex resumed>) = 0
[pid 993] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 992] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 993] <... mount resumed>) = 0
[pid 993] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 992] <... futex resumed>) = 0
[pid 992] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 992] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 992] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 992] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 992] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[994], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 994
[pid 992] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 992] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 994 attached
<unfinished ...>
[pid 994] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 994] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 993] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 994] <... umount2 resumed>) = 0
[pid 993] <... umount2 resumed>) = 0
[pid 994] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 992] <... futex resumed>) = 0
[pid 994] <... futex resumed>) = 1
[pid 994] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 993] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 993] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 992] exit_group(0) = ?
[pid 993] <... futex resumed>) = ?
[pid 993] +++ exited with 0 +++
[pid 994] <... futex resumed>) = ?
[pid 994] +++ exited with 0 +++
[pid 992] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=992, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 995
./strace-static-x86_64: Process 995 attached
[pid 995] set_robust_list(0x5555560865e0, 24) = 0
[pid 995] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 995] setpgid(0, 0) = 0
[pid 995] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 995] write(3, "1000", 4) = 4
[pid 995] close(3) = 0
[pid 995] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 995] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 995] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 995] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 996 attached
<unfinished ...>
[pid 996] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 996] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 995] <... clone resumed>, parent_tid=[996], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 996
[pid 995] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 996] <... futex resumed>) = 0
[pid 996] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 995] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 996] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 996] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 995] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 995] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 996] <... futex resumed>) = 0
[pid 995] <... futex resumed>) = 1
[pid 996] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 995] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 996] <... mount resumed>) = 0
[pid 996] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 996] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 995] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 995] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 996] <... futex resumed>) = 0
[pid 996] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 995] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 996] <... mount resumed>) = 0
[pid 996] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 996] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 995] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 995] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 996] <... futex resumed>) = 0
[pid 996] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 995] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 996] <... umount2 resumed>) = 0
[pid 996] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 996] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 995] <... futex resumed>) = 0
[pid 995] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 995] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 995] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 997 attached
<unfinished ...>
[pid 997] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 995] <... clone resumed>, parent_tid=[997], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 997
[pid 997] <... set_robust_list resumed>) = 0
[pid 995] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 997] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 995] <... futex resumed>) = 0
[pid 995] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 997] <... umount2 resumed>) = 0
[pid 997] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 997] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 995] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 995] exit_group(0 <unfinished ...>
[pid 996] <... futex resumed>) = ?
[pid 995] <... exit_group resumed>) = ?
[pid 996] +++ exited with 0 +++
[pid 997] <... futex resumed>) = ?
[pid 997] +++ exited with 0 +++
[pid 995] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=995, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 998 attached
<unfinished ...>
[pid 998] set_robust_list(0x5555560865e0, 24 <unfinished ...>
[pid 371] <... clone resumed>, child_tidptr=0x5555560865d0) = 998
[pid 998] <... set_robust_list resumed>) = 0
[pid 998] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 998] setpgid(0, 0) = 0
[pid 998] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 998] write(3, "1000", 4) = 4
[pid 998] close(3) = 0
[pid 998] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 998] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 998] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 998] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 999 attached
<unfinished ...>
[pid 999] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 999] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 998] <... clone resumed>, parent_tid=[999], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 999
[pid 998] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 999] <... futex resumed>) = 0
[pid 998] <... futex resumed>) = 1
[pid 998] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 999] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 999] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 998] <... futex resumed>) = 0
[pid 998] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 998] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 999] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 999] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 998] <... futex resumed>) = 0
[pid 999] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 998] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 998] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 999] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 999] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 999] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 999] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 998] <... futex resumed>) = 0
[pid 998] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 998] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 998] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 998] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 999] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 998] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 999] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 998] <... clone resumed>, parent_tid=[1000], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1000
[pid 998] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 998] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1000 attached
<unfinished ...>
[pid 1000] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1000] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 999] <... umount2 resumed>) = 0
[pid 999] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1000] <... umount2 resumed>) = 0
[pid 1000] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 998] <... futex resumed>) = 0
[pid 998] exit_group(0) = ?
[pid 999] <... futex resumed>) = ?
[pid 1000] <... futex resumed>) = ?
[pid 1000] +++ exited with 0 +++
[pid 999] +++ exited with 0 +++
[pid 998] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=998, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1001
./strace-static-x86_64: Process 1001 attached
[pid 1001] set_robust_list(0x5555560865e0, 24) = 0
[pid 1001] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1001] setpgid(0, 0) = 0
[pid 1001] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1001] write(3, "1000", 4) = 4
[pid 1001] close(3) = 0
[pid 1001] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1001] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1001] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1001] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1002 attached
, parent_tid=[1002], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1002
[pid 1002] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1002] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1001] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1002] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1001] <... futex resumed>) = 0
[pid 1001] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1002] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1002] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1002] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1001] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1001] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1002] <... futex resumed>) = 0
[pid 1002] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1001] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1002] <... mount resumed>) = 0
[pid 1002] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1002] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1001] <... futex resumed>) = 0
[pid 1001] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1002] <... futex resumed>) = 0
[pid 1002] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1001] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1002] <... mount resumed>) = 0
[pid 1002] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1001] <... futex resumed>) = 0
[pid 1002] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1001] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1001] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1001] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1001] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1002] <... umount2 resumed>) = 0
[pid 1002] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1001] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1002] <... futex resumed>) = 0
[pid 1002] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1003 attached
<unfinished ...>
[pid 1001] <... clone resumed>, parent_tid=[1003], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1003
[pid 1003] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1001] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1003] <... set_robust_list resumed>) = 0
[pid 1001] <... futex resumed>) = 0
[pid 1001] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1003] umount2("./file0", MNT_DETACH) = 0
[pid 1003] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1001] <... futex resumed>) = 0
[pid 1003] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1001] exit_group(0) = ?
[pid 1002] <... futex resumed>) = ?
[pid 1002] +++ exited with 0 +++
[pid 1003] <... futex resumed>) = ?
[pid 1003] +++ exited with 0 +++
[pid 1001] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1001, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1004 attached
, child_tidptr=0x5555560865d0) = 1004
[pid 1004] set_robust_list(0x5555560865e0, 24) = 0
[pid 1004] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1004] setpgid(0, 0) = 0
[pid 1004] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1004] write(3, "1000", 4) = 4
[pid 1004] close(3) = 0
[pid 1004] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1004] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1004] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1004] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1005], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1005
[pid 1004] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1004] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1005 attached
<unfinished ...>
[pid 1005] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1005] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1005] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1004] <... futex resumed>) = 0
[pid 1004] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1004] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1005] <... futex resumed>) = 1
[pid 1005] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1005] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1004] <... futex resumed>) = 0
[pid 1005] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1004] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1004] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1005] <... mount resumed>) = 0
[pid 1005] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1004] <... futex resumed>) = 0
[pid 1004] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1005] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1004] <... futex resumed>) = 0
[pid 1004] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1004] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1005] <... umount2 resumed>) = 0
[pid 1004] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1005] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1004] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1005] <... futex resumed>) = 0
[pid 1005] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1004] <... clone resumed>, parent_tid=[1006], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1006
[pid 1004] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 1006 attached
[pid 1004] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1006] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1006] umount2("./file0", MNT_DETACH) = 0
[pid 1006] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1004] <... futex resumed>) = 0
[pid 1004] exit_group(0) = ?
[pid 1006] +++ exited with 0 +++
[pid 1005] <... futex resumed>) = ?
[pid 1005] +++ exited with 0 +++
[pid 1004] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1004, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1007
./strace-static-x86_64: Process 1007 attached
[pid 1007] set_robust_list(0x5555560865e0, 24) = 0
[pid 1007] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1007] setpgid(0, 0) = 0
[pid 1007] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1007] write(3, "1000", 4) = 4
[pid 1007] close(3) = 0
[pid 1007] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1007] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1007] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1007] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1008 attached
, parent_tid=[1008], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1008
[pid 1008] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1008] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1007] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1008] <... futex resumed>) = 0
[pid 1007] <... futex resumed>) = 1
[pid 1007] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1008] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1008] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1008] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1007] <... futex resumed>) = 0
[pid 1007] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1008] <... futex resumed>) = 0
[pid 1007] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1008] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1008] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1008] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1007] <... futex resumed>) = 0
[pid 1007] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1008] <... futex resumed>) = 0
[pid 1007] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1008] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1008] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1007] <... futex resumed>) = 0
[pid 1008] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1007] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1007] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1007] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1007] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1007] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1009], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1009
[pid 1008] <... umount2 resumed>) = 0
[pid 1007] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1008] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1007] <... futex resumed>) = 0
[pid 1008] <... futex resumed>) = 0
[pid 1007] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1008] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1009 attached
<unfinished ...>
[pid 1009] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1009] umount2("./file0", MNT_DETACH) = 0
[pid 1009] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1007] <... futex resumed>) = 0
[pid 1009] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1007] exit_group(0) = ?
[pid 1008] <... futex resumed>) = ?
[pid 1008] +++ exited with 0 +++
[pid 1009] <... futex resumed>) = ?
[pid 1009] +++ exited with 0 +++
[pid 1007] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1007, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1010
./strace-static-x86_64: Process 1010 attached
[pid 1010] set_robust_list(0x5555560865e0, 24) = 0
[pid 1010] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1010] setpgid(0, 0) = 0
[pid 1010] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1010] write(3, "1000", 4) = 4
[pid 1010] close(3) = 0
[pid 1010] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1010] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1010] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1010] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1011 attached
, parent_tid=[1011], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1011
[pid 1010] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1010] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1011] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1011] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1011] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1010] <... futex resumed>) = 0
[pid 1011] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1010] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1010] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1011] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1011] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1011] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1010] <... futex resumed>) = 0
[pid 1010] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1010] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1011] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1011] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1010] <... futex resumed>) = 0
[pid 1010] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1010] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1010] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1010] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1011] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1010] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1012], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1012
[pid 1010] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1010] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1012 attached
<unfinished ...>
[pid 1012] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1012] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1011] <... umount2 resumed>) = 0
[pid 1011] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1012] <... umount2 resumed>) = 0
[pid 1012] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1010] <... futex resumed>) = 0
[pid 1011] <... futex resumed>) = 0
[pid 1010] exit_group(0) = ?
[pid 1012] <... futex resumed>) = ?
[pid 1012] +++ exited with 0 +++
[pid 1011] +++ exited with 0 +++
[pid 1010] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1010, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1013 attached
, child_tidptr=0x5555560865d0) = 1013
[pid 1013] set_robust_list(0x5555560865e0, 24) = 0
[pid 1013] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1013] setpgid(0, 0) = 0
[pid 1013] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1013] write(3, "1000", 4) = 4
[pid 1013] close(3) = 0
[pid 1013] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1013] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1013] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1013] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1014 attached
, parent_tid=[1014], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1014
[pid 1014] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1013] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1014] <... set_robust_list resumed>) = 0
[pid 1013] <... futex resumed>) = 0
[pid 1013] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1014] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1014] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1013] <... futex resumed>) = 0
[pid 1014] <... futex resumed>) = 1
[pid 1013] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1014] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1013] <... futex resumed>) = 0
[pid 1013] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1014] <... mount resumed>) = 0
[pid 1014] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1013] <... futex resumed>) = 0
[pid 1014] <... futex resumed>) = 1
[pid 1013] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1013] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1014] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1014] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1013] <... futex resumed>) = 0
[pid 1013] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1013] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1013] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1013] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1014] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1013] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1015], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1015
[pid 1013] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1013] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1015 attached
<unfinished ...>
[pid 1015] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1015] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1014] <... umount2 resumed>) = 0
[pid 1015] <... umount2 resumed>) = 0
[pid 1014] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1015] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1014] <... futex resumed>) = 0
[pid 1013] <... futex resumed>) = 0
[pid 1013] exit_group(0) = ?
[pid 1015] <... futex resumed>) = ?
[pid 1015] +++ exited with 0 +++
[pid 1014] +++ exited with 0 +++
[pid 1013] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1013, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1016
./strace-static-x86_64: Process 1016 attached
[pid 1016] set_robust_list(0x5555560865e0, 24) = 0
[pid 1016] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1016] setpgid(0, 0) = 0
[pid 1016] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1016] write(3, "1000", 4) = 4
[pid 1016] close(3) = 0
[pid 1016] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1016] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1016] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1016] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1017 attached
, parent_tid=[1017], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1017
[pid 1016] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1016] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1017] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1017] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1017] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1016] <... futex resumed>) = 0
[pid 1016] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1016] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1017] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1017] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1016] <... futex resumed>) = 0
[pid 1016] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1016] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1017] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1017] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1016] <... futex resumed>) = 0
[pid 1017] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1016] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1016] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1016] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1016] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1016] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1018 attached
<unfinished ...>
[pid 1018] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1016] <... clone resumed>, parent_tid=[1018], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1018
[pid 1016] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1016] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1018] <... set_robust_list resumed>) = 0
[pid 1018] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1017] <... umount2 resumed>) = 0
[pid 1017] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1017] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1018] <... umount2 resumed>) = 0
[pid 1018] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1016] <... futex resumed>) = 0
[pid 1016] exit_group(0) = ?
[pid 1018] +++ exited with 0 +++
[pid 1017] <... futex resumed>) = ?
[pid 1017] +++ exited with 0 +++
[pid 1016] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1016, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1019
./strace-static-x86_64: Process 1019 attached
[pid 1019] set_robust_list(0x5555560865e0, 24) = 0
[pid 1019] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1019] setpgid(0, 0) = 0
[pid 1019] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1019] write(3, "1000", 4) = 4
[pid 1019] close(3) = 0
[pid 1019] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1019] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1019] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1019] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1020], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1020
[pid 1019] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1019] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1020 attached
<unfinished ...>
[pid 1020] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1020] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1020] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1019] <... futex resumed>) = 0
[pid 1019] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1019] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1020] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1020] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1019] <... futex resumed>) = 0
[pid 1019] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1019] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1020] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1020] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1019] <... futex resumed>) = 0
[pid 1019] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1019] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1019] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1019] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1019] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1021 attached
, parent_tid=[1021], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1021
[pid 1021] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1019] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1021] <... set_robust_list resumed>) = 0
[pid 1019] <... futex resumed>) = 0
[pid 1021] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1019] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1020] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1021] <... umount2 resumed>) = 0
[pid 1021] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1020] <... umount2 resumed>) = 0
[pid 1021] <... futex resumed>) = 1
[pid 1019] <... futex resumed>) = 0
[pid 1020] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1021] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1019] exit_group(0) = ?
[pid 1020] <... futex resumed>) = ?
[pid 1020] +++ exited with 0 +++
[pid 1021] <... futex resumed>) = ?
[pid 1021] +++ exited with 0 +++
[pid 1019] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1019, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1022
./strace-static-x86_64: Process 1022 attached
[pid 1022] set_robust_list(0x5555560865e0, 24) = 0
[pid 1022] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1022] setpgid(0, 0) = 0
[pid 1022] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1022] write(3, "1000", 4) = 4
[pid 1022] close(3) = 0
[pid 1022] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1022] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1022] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1022] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1023 attached
, parent_tid=[1023], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1023
[pid 1022] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1022] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1023] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1023] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1023] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1022] <... futex resumed>) = 0
[pid 1022] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1022] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1023] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1023] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1022] <... futex resumed>) = 0
[pid 1023] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1022] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1022] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1023] <... mount resumed>) = 0
[pid 1023] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1022] <... futex resumed>) = 0
[pid 1022] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1022] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1022] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1022] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1023] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1022] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1024], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1024
[pid 1022] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1022] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1024 attached
<unfinished ...>
[pid 1024] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1024] umount2("./file0", MNT_DETACH) = 0
[pid 1023] <... umount2 resumed>) = 0
[pid 1024] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1022] <... futex resumed>) = 0
[pid 1023] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1024] <... futex resumed>) = 1
[pid 1024] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1023] <... futex resumed>) = 0
[pid 1023] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1022] exit_group(0) = ?
[pid 1024] <... futex resumed>) = ?
[pid 1023] <... futex resumed>) = ?
[pid 1024] +++ exited with 0 +++
[pid 1023] +++ exited with 0 +++
[pid 1022] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1022, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1025 attached
, child_tidptr=0x5555560865d0) = 1025
[pid 1025] set_robust_list(0x5555560865e0, 24) = 0
[pid 1025] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1025] setpgid(0, 0) = 0
[pid 1025] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1025] write(3, "1000", 4) = 4
[pid 1025] close(3) = 0
[pid 1025] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1025] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1025] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1025] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1026 attached
, parent_tid=[1026], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1026
[pid 1026] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1026] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1025] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1026] <... futex resumed>) = 0
[pid 1026] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1025] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1026] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1026] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1025] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1025] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1026] <... futex resumed>) = 0
[pid 1026] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1025] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1026] <... mount resumed>) = 0
[pid 1026] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1025] <... futex resumed>) = 0
[pid 1025] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1025] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1026] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1026] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1025] <... futex resumed>) = 0
[pid 1025] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1025] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1025] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1025] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1025] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1026] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1025] <... clone resumed>, parent_tid=[1027], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1027
[pid 1025] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1025] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1027 attached
<unfinished ...>
[pid 1027] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1027] umount2("./file0", MNT_DETACH) = 0
[pid 1027] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1025] <... futex resumed>) = 0
[pid 1026] <... umount2 resumed>) = 0
[pid 1027] <... futex resumed>) = 1
[pid 1027] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1026] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1026] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1025] exit_group(0) = ?
[pid 1027] <... futex resumed>) = 231
[pid 1027] +++ exited with 0 +++
[pid 1026] <... futex resumed>) = ?
[pid 1026] +++ exited with 0 +++
[pid 1025] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1025, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1028
./strace-static-x86_64: Process 1028 attached
[pid 1028] set_robust_list(0x5555560865e0, 24) = 0
[pid 1028] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1028] setpgid(0, 0) = 0
[pid 1028] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1028] write(3, "1000", 4) = 4
[pid 1028] close(3) = 0
[pid 1028] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1028] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1028] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1028] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1029], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1029
./strace-static-x86_64: Process 1029 attached
[pid 1029] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1029] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1028] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1029] <... futex resumed>) = 0
[pid 1029] mkdir("./file0", 000 <unfinished ...>
[pid 1028] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1029] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1029] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1029] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1028] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1028] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1029] <... futex resumed>) = 0
[pid 1029] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1028] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1029] <... mount resumed>) = 0
[pid 1029] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1029] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1028] <... futex resumed>) = 0
[pid 1028] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1029] <... futex resumed>) = 0
[pid 1029] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1028] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1029] <... mount resumed>) = 0
[pid 1029] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1028] <... futex resumed>) = 0
[pid 1028] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1029] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1028] <... futex resumed>) = 0
[pid 1028] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1028] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1028] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1028] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1029] <... umount2 resumed>) = 0
[pid 1029] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1029] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1030 attached
<unfinished ...>
[pid 1028] <... clone resumed>, parent_tid=[1030], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1030
[pid 1030] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1028] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1030] <... set_robust_list resumed>) = 0
[pid 1030] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1028] <... futex resumed>) = 0
[pid 1028] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1030] <... umount2 resumed>) = 0
[pid 1030] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1030] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1028] <... futex resumed>) = 0
[pid 1028] exit_group(0) = ?
[pid 1029] <... futex resumed>) = ?
[pid 1029] +++ exited with 0 +++
[pid 1030] <... futex resumed>) = ?
[pid 1030] +++ exited with 0 +++
[pid 1028] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1028, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1031
./strace-static-x86_64: Process 1031 attached
[pid 1031] set_robust_list(0x5555560865e0, 24) = 0
[pid 1031] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1031] setpgid(0, 0) = 0
[pid 1031] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1031] write(3, "1000", 4) = 4
[pid 1031] close(3) = 0
[pid 1031] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1031] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1031] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1031] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1032], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1032
[pid 1031] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1031] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1032 attached
<unfinished ...>
[pid 1032] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1032] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1032] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1031] <... futex resumed>) = 0
[pid 1031] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1031] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1032] <... futex resumed>) = 1
[pid 1032] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1032] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1031] <... futex resumed>) = 0
[pid 1031] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1031] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1032] <... futex resumed>) = 1
[pid 1032] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1032] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1031] <... futex resumed>) = 0
[pid 1032] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1031] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1032] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1031] <... futex resumed>) = 0
[pid 1032] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1031] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1031] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1031] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1031] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1033 attached
<unfinished ...>
[pid 1032] <... umount2 resumed>) = 0
[pid 1033] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1031] <... clone resumed>, parent_tid=[1033], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1033
[pid 1033] <... set_robust_list resumed>) = 0
[pid 1032] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1031] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1033] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1032] <... futex resumed>) = 0
[pid 1031] <... futex resumed>) = 0
[pid 1032] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1031] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1033] <... umount2 resumed>) = 0
[pid 1033] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1031] <... futex resumed>) = 0
[pid 1033] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1031] exit_group(0 <unfinished ...>
[pid 1033] <... futex resumed>) = ?
[pid 1032] <... futex resumed>) = ?
[pid 1031] <... exit_group resumed>) = ?
[pid 1032] +++ exited with 0 +++
[pid 1033] +++ exited with 0 +++
[pid 1031] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1031, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1034
./strace-static-x86_64: Process 1034 attached
[pid 1034] set_robust_list(0x5555560865e0, 24) = 0
[pid 1034] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1034] setpgid(0, 0) = 0
[pid 1034] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1034] write(3, "1000", 4) = 4
[pid 1034] close(3) = 0
[pid 1034] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1034] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1034] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1034] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1035 attached
<unfinished ...>
[pid 1035] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1035] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1034] <... clone resumed>, parent_tid=[1035], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1035
[pid 1034] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1035] <... futex resumed>) = 0
[pid 1034] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1035] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1035] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1035] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1034] <... futex resumed>) = 0
[pid 1034] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1035] <... futex resumed>) = 0
[pid 1035] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1034] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1035] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1035] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1034] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1034] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1035] <... futex resumed>) = 0
[pid 1035] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1034] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1035] <... mount resumed>) = 0
[pid 1035] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1035] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1034] <... futex resumed>) = 0
[pid 1034] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1034] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1035] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1034] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1035] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1034] <... mmap resumed>) = 0x7f236e446000
[pid 1034] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1034] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1035] <... umount2 resumed>) = 0
[pid 1035] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1035] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1034] <... clone resumed>, parent_tid=[1036], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1036
./strace-static-x86_64: Process 1036 attached
[pid 1034] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1036] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1034] <... futex resumed>) = 0
[pid 1036] <... set_robust_list resumed>) = 0
[pid 1034] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1036] umount2("./file0", MNT_DETACH) = 0
[pid 1036] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1034] <... futex resumed>) = 0
[pid 1034] exit_group(0) = ?
[pid 1035] <... futex resumed>) = ?
[pid 1035] +++ exited with 0 +++
[pid 1036] +++ exited with 0 +++
[pid 1034] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1034, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1037
./strace-static-x86_64: Process 1037 attached
[pid 1037] set_robust_list(0x5555560865e0, 24) = 0
[pid 1037] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1037] setpgid(0, 0) = 0
[pid 1037] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1037] write(3, "1000", 4) = 4
[pid 1037] close(3) = 0
[pid 1037] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1037] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1037] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1037] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1038 attached
, parent_tid=[1038], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1038
[pid 1038] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1038] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1037] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1038] <... futex resumed>) = 0
[pid 1037] <... futex resumed>) = 1
[pid 1037] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1038] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1038] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1038] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1037] <... futex resumed>) = 0
[pid 1037] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1038] <... futex resumed>) = 0
[pid 1038] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1037] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1038] <... mount resumed>) = 0
[pid 1038] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1037] <... futex resumed>) = 0
[pid 1038] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1037] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1038] <... futex resumed>) = 0
[pid 1037] <... futex resumed>) = 1
[pid 1038] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1037] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1038] <... mount resumed>) = 0
[pid 1038] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1038] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1037] <... futex resumed>) = 0
[pid 1037] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1038] <... futex resumed>) = 0
[pid 1037] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1038] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1037] <... futex resumed>) = 0
[pid 1037] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1037] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1037] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1038] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 1039 attached
[pid 1038] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1039] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1038] <... futex resumed>) = 0
[pid 1039] <... set_robust_list resumed>) = 0
[pid 1037] <... clone resumed>, parent_tid=[1039], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1039
[pid 1038] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1039] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1037] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1039] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1037] <... futex resumed>) = 0
[pid 1039] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1037] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1039] <... umount2 resumed>) = 0
[pid 1039] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1037] <... futex resumed>) = 0
[pid 1037] exit_group(0 <unfinished ...>
[pid 1039] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1037] <... exit_group resumed>) = ?
[pid 1039] <... futex resumed>) = ?
[pid 1038] <... futex resumed>) = ?
[pid 1038] +++ exited with 0 +++
[pid 1039] +++ exited with 0 +++
[pid 1037] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1037, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1040 attached
, child_tidptr=0x5555560865d0) = 1040
[pid 1040] set_robust_list(0x5555560865e0, 24) = 0
[pid 1040] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1040] setpgid(0, 0) = 0
[pid 1040] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1040] write(3, "1000", 4) = 4
[pid 1040] close(3) = 0
[pid 1040] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1040] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1040] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1040] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1041 attached
<unfinished ...>
[pid 1041] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1040] <... clone resumed>, parent_tid=[1041], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1041
[pid 1041] <... set_robust_list resumed>) = 0
[pid 1040] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1040] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1041] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1041] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1040] <... futex resumed>) = 0
[pid 1040] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1040] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1041] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1041] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1040] <... futex resumed>) = 0
[pid 1040] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1040] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1041] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1041] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1040] <... futex resumed>) = 0
[pid 1040] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1040] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1040] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1040] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1040] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1041] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1040] <... clone resumed>, parent_tid=[1042], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1042
[pid 1040] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1040] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1042 attached
<unfinished ...>
[pid 1042] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1042] umount2("./file0", MNT_DETACH) = 0
[pid 1042] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1040] <... futex resumed>) = 0
[pid 1042] <... futex resumed>) = 1
[pid 1042] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1041] <... umount2 resumed>) = 0
[pid 1041] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1041] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1040] exit_group(0) = ?
[pid 1042] <... futex resumed>) = 231
[pid 1041] <... futex resumed>) = ?
[pid 1042] +++ exited with 0 +++
[pid 1041] +++ exited with 0 +++
[pid 1040] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1040, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1043
./strace-static-x86_64: Process 1043 attached
[pid 1043] set_robust_list(0x5555560865e0, 24) = 0
[pid 1043] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1043] setpgid(0, 0) = 0
[pid 1043] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1043] write(3, "1000", 4) = 4
[pid 1043] close(3) = 0
[pid 1043] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1043] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1043] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1043] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1044 attached
, parent_tid=[1044], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1044
[pid 1044] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1043] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1044] <... set_robust_list resumed>) = 0
[pid 1043] <... futex resumed>) = 0
[pid 1044] mkdir("./file0", 000 <unfinished ...>
[pid 1043] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1044] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1044] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1043] <... futex resumed>) = 0
[pid 1044] <... futex resumed>) = 1
[pid 1043] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1044] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1043] <... futex resumed>) = 0
[pid 1043] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1044] <... mount resumed>) = 0
[pid 1044] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1043] <... futex resumed>) = 0
[pid 1044] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1043] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1044] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1043] <... futex resumed>) = 0
[pid 1044] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1043] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1044] <... mount resumed>) = 0
[pid 1044] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1043] <... futex resumed>) = 0
[pid 1043] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1043] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1043] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1043] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1043] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1044] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 1045 attached
<unfinished ...>
[pid 1043] <... clone resumed>, parent_tid=[1045], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1045
[pid 1043] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1043] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1045] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1044] <... umount2 resumed>) = 0
[pid 1045] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1044] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1044] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1045] <... umount2 resumed>) = 0
[pid 1045] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1043] <... futex resumed>) = 0
[pid 1043] exit_group(0) = ?
[pid 1044] <... futex resumed>) = ?
[pid 1044] +++ exited with 0 +++
[pid 1045] +++ exited with 0 +++
[pid 1043] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1043, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1046
./strace-static-x86_64: Process 1046 attached
[pid 1046] set_robust_list(0x5555560865e0, 24) = 0
[pid 1046] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1046] setpgid(0, 0) = 0
[pid 1046] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1046] write(3, "1000", 4) = 4
[pid 1046] close(3) = 0
[pid 1046] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1046] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1046] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1046] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1047 attached
, parent_tid=[1047], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1047
[pid 1047] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1046] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1047] <... set_robust_list resumed>) = 0
[pid 1046] <... futex resumed>) = 0
[pid 1047] mkdir("./file0", 000 <unfinished ...>
[pid 1046] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1047] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1047] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1046] <... futex resumed>) = 0
[pid 1047] <... futex resumed>) = 1
[pid 1046] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1046] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1047] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1047] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1046] <... futex resumed>) = 0
[pid 1046] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1046] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1047] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1047] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1046] <... futex resumed>) = 0
[pid 1046] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1046] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1046] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1046] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1046] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1048 attached
<unfinished ...>
[pid 1047] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1046] <... clone resumed>, parent_tid=[1048], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1048
[pid 1046] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1046] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1048] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1047] <... umount2 resumed>) = 0
[pid 1048] <... set_robust_list resumed>) = 0
[pid 1047] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1048] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1047] <... futex resumed>) = 0
[pid 1047] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1048] <... umount2 resumed>) = 0
[pid 1048] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1046] <... futex resumed>) = 0
[pid 1046] exit_group(0) = ?
[pid 1047] <... futex resumed>) = ?
[pid 1047] +++ exited with 0 +++
[pid 1048] +++ exited with 0 +++
[pid 1046] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1046, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1049
./strace-static-x86_64: Process 1049 attached
[pid 1049] set_robust_list(0x5555560865e0, 24) = 0
[pid 1049] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1049] setpgid(0, 0) = 0
[pid 1049] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1049] write(3, "1000", 4) = 4
[pid 1049] close(3) = 0
[pid 1049] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1049] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1049] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1049] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1050 attached
, parent_tid=[1050], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1050
[pid 1050] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1049] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1050] <... set_robust_list resumed>) = 0
[pid 1049] <... futex resumed>) = 0
[pid 1049] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1050] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1050] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1049] <... futex resumed>) = 0
[pid 1050] <... futex resumed>) = 1
[pid 1049] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1050] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1049] <... futex resumed>) = 0
[pid 1049] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1050] <... mount resumed>) = 0
[pid 1050] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1049] <... futex resumed>) = 0
[pid 1049] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1050] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1049] <... futex resumed>) = 0
[pid 1049] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1050] <... mount resumed>) = 0
[pid 1050] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1049] <... futex resumed>) = 0
[pid 1049] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1049] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1049] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1049] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1049] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1050] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 1051 attached
<unfinished ...>
[pid 1049] <... clone resumed>, parent_tid=[1051], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1051
[pid 1049] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1049] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1050] <... umount2 resumed>) = 0
[pid 1051] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1050] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1051] <... set_robust_list resumed>) = 0
[pid 1050] <... futex resumed>) = 0
[pid 1051] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1050] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1051] <... umount2 resumed>) = 0
[pid 1051] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1049] <... futex resumed>) = 0
[pid 1049] exit_group(0 <unfinished ...>
[pid 1050] <... futex resumed>) = ?
[pid 1049] <... exit_group resumed>) = ?
[pid 1050] +++ exited with 0 +++
[pid 1051] +++ exited with 0 +++
[pid 1049] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1049, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1052
./strace-static-x86_64: Process 1052 attached
[pid 1052] set_robust_list(0x5555560865e0, 24) = 0
[pid 1052] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1052] setpgid(0, 0) = 0
[pid 1052] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1052] write(3, "1000", 4) = 4
[pid 1052] close(3) = 0
[pid 1052] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1052] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1052] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1052] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1053 attached
, parent_tid=[1053], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1053
[pid 1053] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1052] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1053] <... set_robust_list resumed>) = 0
[pid 1052] <... futex resumed>) = 0
[pid 1053] mkdir("./file0", 000 <unfinished ...>
[pid 1052] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1053] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1053] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1052] <... futex resumed>) = 0
[pid 1053] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1052] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1053] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1052] <... futex resumed>) = 0
[pid 1053] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1052] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1053] <... mount resumed>) = 0
[pid 1053] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1052] <... futex resumed>) = 0
[pid 1052] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1052] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1053] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1053] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1052] <... futex resumed>) = 0
[pid 1052] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1053] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1052] <... futex resumed>) = 0
[pid 1052] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1052] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1052] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1053] <... umount2 resumed>) = 0
[pid 1052] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1054], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1054
[pid 1053] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1052] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1053] <... futex resumed>) = 0
[pid 1052] <... futex resumed>) = 0
[pid 1052] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1054 attached
<unfinished ...>
[pid 1054] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1054] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1053] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1054] <... umount2 resumed>) = 0
[pid 1054] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1052] <... futex resumed>) = 0
[pid 1052] exit_group(0) = ?
[pid 1054] <... futex resumed>) = ?
[pid 1053] <... futex resumed>) = ?
[pid 1054] +++ exited with 0 +++
[pid 1053] +++ exited with 0 +++
[pid 1052] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1052, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1055
./strace-static-x86_64: Process 1055 attached
[pid 1055] set_robust_list(0x5555560865e0, 24) = 0
[pid 1055] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1055] setpgid(0, 0) = 0
[pid 1055] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1055] write(3, "1000", 4) = 4
[pid 1055] close(3) = 0
[pid 1055] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1055] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1055] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1055] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1056 attached
, parent_tid=[1056], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1056
[pid 1056] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1055] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1056] <... set_robust_list resumed>) = 0
[pid 1055] <... futex resumed>) = 0
[pid 1055] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1056] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1056] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1055] <... futex resumed>) = 0
[pid 1056] <... futex resumed>) = 1
[pid 1055] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1056] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1055] <... futex resumed>) = 0
[pid 1055] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1056] <... mount resumed>) = 0
[pid 1056] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1055] <... futex resumed>) = 0
[pid 1055] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1056] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1055] <... futex resumed>) = 0
[pid 1055] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1056] <... mount resumed>) = 0
[pid 1056] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1055] <... futex resumed>) = 0
[pid 1055] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1056] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1055] <... futex resumed>) = 0
[pid 1055] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1055] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1055] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1055] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1056] <... umount2 resumed>) = 0
[pid 1056] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1055] <... clone resumed>, parent_tid=[1057], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1057
[pid 1055] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1056] <... futex resumed>) = 0
[pid 1055] <... futex resumed>) = 0
./strace-static-x86_64: Process 1057 attached
[pid 1055] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1056] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1057] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1057] umount2("./file0", MNT_DETACH) = 0
[pid 1057] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1057] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1055] <... futex resumed>) = 0
[pid 1055] exit_group(0) = ?
[pid 1056] <... futex resumed>) = ?
[pid 1056] +++ exited with 0 +++
[pid 1057] <... futex resumed>) = ?
[pid 1057] +++ exited with 0 +++
[pid 1055] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1055, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1058
./strace-static-x86_64: Process 1058 attached
[pid 1058] set_robust_list(0x5555560865e0, 24) = 0
[pid 1058] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1058] setpgid(0, 0) = 0
[pid 1058] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1058] write(3, "1000", 4) = 4
[pid 1058] close(3) = 0
[pid 1058] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1058] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1058] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1058] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1059 attached
<unfinished ...>
[pid 1059] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1059] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1058] <... clone resumed>, parent_tid=[1059], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1059
[pid 1058] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1059] <... futex resumed>) = 0
[pid 1059] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1059] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1059] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1058] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1058] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1059] <... futex resumed>) = 0
[pid 1059] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1058] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1059] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1059] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1058] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1058] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1059] <... futex resumed>) = 0
[pid 1059] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1058] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1059] <... mount resumed>) = 0
[pid 1059] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1058] <... futex resumed>) = 0
[pid 1058] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1058] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1058] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1058] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1059] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1058] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1059] <... umount2 resumed>) = 0
[pid 1059] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1060 attached
) = 0
[pid 1058] <... clone resumed>, parent_tid=[1060], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1060
[pid 1058] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1058] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1060] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1059] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1060] <... set_robust_list resumed>) = 0
[pid 1060] umount2("./file0", MNT_DETACH) = 0
[pid 1060] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1060] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1058] <... futex resumed>) = 0
[pid 1058] exit_group(0 <unfinished ...>
[pid 1059] <... futex resumed>) = ?
[pid 1059] +++ exited with 0 +++
[pid 1058] <... exit_group resumed>) = ?
[pid 1060] <... futex resumed>) = ?
[pid 1060] +++ exited with 0 +++
[pid 1058] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1058, si_uid=0, si_status=0, si_utime=0, si_stime=2} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1061
./strace-static-x86_64: Process 1061 attached
[pid 1061] set_robust_list(0x5555560865e0, 24) = 0
[pid 1061] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1061] setpgid(0, 0) = 0
[pid 1061] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1061] write(3, "1000", 4) = 4
[pid 1061] close(3) = 0
[pid 1061] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1061] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1061] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1061] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1062 attached
, parent_tid=[1062], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1062
[pid 1062] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1062] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1061] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1062] <... futex resumed>) = 0
[pid 1062] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1062] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1062] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1061] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1061] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1062] <... futex resumed>) = 0
[pid 1062] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1061] <... futex resumed>) = 1
[pid 1062] <... mount resumed>) = 0
[pid 1061] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1062] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1062] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1061] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1061] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1062] <... futex resumed>) = 0
[pid 1062] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1061] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1062] <... mount resumed>) = 0
[pid 1062] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1062] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1061] <... futex resumed>) = 0
[pid 1061] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1062] <... futex resumed>) = 0
[pid 1062] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1061] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1062] <... umount2 resumed>) = 0
[pid 1062] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1062] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1061] <... futex resumed>) = 0
[pid 1061] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1061] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1061] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1063], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1063
./strace-static-x86_64: Process 1063 attached
[pid 1061] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1063] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1063] umount2("./file0", MNT_DETACH) = 0
[pid 1063] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1063] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1061] <... futex resumed>) = 1
[pid 1063] <... futex resumed>) = 0
[pid 1063] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1061] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1061] exit_group(0 <unfinished ...>
[pid 1062] <... futex resumed>) = ?
[pid 1061] <... exit_group resumed>) = ?
[pid 1062] +++ exited with 0 +++
[pid 1063] <... futex resumed>) = ?
[pid 1063] +++ exited with 0 +++
[pid 1061] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1061, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1064
./strace-static-x86_64: Process 1064 attached
[pid 1064] set_robust_list(0x5555560865e0, 24) = 0
[pid 1064] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1064] setpgid(0, 0) = 0
[pid 1064] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1064] write(3, "1000", 4) = 4
[pid 1064] close(3) = 0
[pid 1064] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1064] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1064] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1064] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1065], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1065
[pid 1064] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1064] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1065 attached
<unfinished ...>
[pid 1065] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1065] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1065] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1064] <... futex resumed>) = 0
[pid 1064] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1064] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1065] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1065] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1064] <... futex resumed>) = 0
[pid 1064] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1065] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1064] <... futex resumed>) = 0
[pid 1064] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1065] <... mount resumed>) = 0
[pid 1065] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1064] <... futex resumed>) = 0
[pid 1065] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1064] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1064] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1064] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1065] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1065] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1064] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1064] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1065] <... umount2 resumed>) = 0
[pid 1064] <... clone resumed>, parent_tid=[1066], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1066
[pid 1064] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1064] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1066 attached
<unfinished ...>
[pid 1066] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1065] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1066] <... set_robust_list resumed>) = 0
[pid 1065] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1066] umount2("./file0", MNT_DETACH) = 0
[pid 1066] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1064] <... futex resumed>) = 0
[pid 1066] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1064] exit_group(0 <unfinished ...>
[pid 1066] <... futex resumed>) = 231
[pid 1064] <... exit_group resumed>) = ?
[pid 1066] +++ exited with 0 +++
[pid 1065] <... futex resumed>) = ?
[pid 1065] +++ exited with 0 +++
[pid 1064] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1064, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1067
./strace-static-x86_64: Process 1067 attached
[pid 1067] set_robust_list(0x5555560865e0, 24) = 0
[pid 1067] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1067] setpgid(0, 0) = 0
[pid 1067] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1067] write(3, "1000", 4) = 4
[pid 1067] close(3) = 0
[pid 1067] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1067] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1067] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1067] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1068 attached
, parent_tid=[1068], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1068
[pid 1068] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1068] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1067] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1068] <... futex resumed>) = 0
[pid 1068] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1068] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1067] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1068] <... futex resumed>) = 0
[pid 1068] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1067] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1067] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1068] <... futex resumed>) = 0
[pid 1068] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1067] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1068] <... mount resumed>) = 0
[pid 1068] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1068] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1067] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1067] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1068] <... futex resumed>) = 0
[pid 1067] <... futex resumed>) = 1
[pid 1068] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1067] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1068] <... mount resumed>) = 0
[pid 1068] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1067] <... futex resumed>) = 0
[pid 1068] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1067] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1067] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1067] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1067] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1067] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1069], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1069
[pid 1067] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1067] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1068] <... umount2 resumed>) = 0
[pid 1068] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1068] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1069 attached
<unfinished ...>
[pid 1069] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1069] umount2("./file0", MNT_DETACH) = 0
[pid 1069] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1067] <... futex resumed>) = 0
[pid 1067] exit_group(0) = ?
[pid 1068] <... futex resumed>) = ?
[pid 1068] +++ exited with 0 +++
[pid 1069] <... futex resumed>) = ?
[pid 1069] +++ exited with 0 +++
[pid 1067] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1067, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1070
./strace-static-x86_64: Process 1070 attached
[pid 1070] set_robust_list(0x5555560865e0, 24) = 0
[pid 1070] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1070] setpgid(0, 0) = 0
[pid 1070] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1070] write(3, "1000", 4) = 4
[pid 1070] close(3) = 0
[pid 1070] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1070] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1070] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1070] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1071 attached
, parent_tid=[1071], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1071
[pid 1071] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1071] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1070] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1071] <... futex resumed>) = 0
[pid 1071] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1070] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1071] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1071] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1070] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1070] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1071] <... futex resumed>) = 0
[pid 1071] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1070] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1071] <... mount resumed>) = 0
[pid 1071] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1070] <... futex resumed>) = 0
[pid 1071] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1070] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1071] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1070] <... futex resumed>) = 0
[pid 1071] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1070] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1071] <... mount resumed>) = 0
[pid 1071] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1070] <... futex resumed>) = 0
[pid 1071] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1070] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1070] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1070] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1071] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1070] <... mmap resumed>) = 0x7f236e446000
[pid 1070] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1070] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1071] <... umount2 resumed>) = 0
[pid 1071] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1070] <... clone resumed>, parent_tid=[1072], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1072
[pid 1071] <... futex resumed>) = 0
[pid 1070] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1071] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1070] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1072 attached
<unfinished ...>
[pid 1072] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1072] umount2("./file0", MNT_DETACH) = 0
[pid 1072] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1070] <... futex resumed>) = 0
[pid 1070] exit_group(0) = ?
[pid 1071] <... futex resumed>) = ?
[pid 1071] +++ exited with 0 +++
[pid 1072] <... futex resumed>) = ?
[pid 1072] +++ exited with 0 +++
[pid 1070] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1070, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1073
./strace-static-x86_64: Process 1073 attached
[pid 1073] set_robust_list(0x5555560865e0, 24) = 0
[pid 1073] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1073] setpgid(0, 0) = 0
[pid 1073] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1073] write(3, "1000", 4) = 4
[pid 1073] close(3) = 0
[pid 1073] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1073] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1073] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1073] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1074], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1074
[pid 1073] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1073] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1074 attached
<unfinished ...>
[pid 1074] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1074] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1074] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1073] <... futex resumed>) = 0
[pid 1073] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1073] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1074] <... futex resumed>) = 1
[pid 1074] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1074] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1073] <... futex resumed>) = 0
[pid 1073] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1073] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1074] <... futex resumed>) = 1
[pid 1074] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1074] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1073] <... futex resumed>) = 0
[pid 1073] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1073] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1073] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1073] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1073] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1075 attached
, parent_tid=[1075], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1075
[pid 1073] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1073] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1074] <... futex resumed>) = 1
[pid 1074] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1075] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1075] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1074] <... umount2 resumed>) = 0
[pid 1074] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1074] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1075] <... umount2 resumed>) = 0
[pid 1075] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1073] <... futex resumed>) = 0
[pid 1073] exit_group(0) = ?
[pid 1074] <... futex resumed>) = ?
[pid 1074] +++ exited with 0 +++
[pid 1075] +++ exited with 0 +++
[pid 1073] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1073, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1076
./strace-static-x86_64: Process 1076 attached
[pid 1076] set_robust_list(0x5555560865e0, 24) = 0
[pid 1076] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1076] setpgid(0, 0) = 0
[pid 1076] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1076] write(3, "1000", 4) = 4
[pid 1076] close(3) = 0
[pid 1076] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1076] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1076] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1076] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1077 attached
, parent_tid=[1077], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1077
[pid 1077] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1077] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1076] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1077] <... futex resumed>) = 0
[pid 1077] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1077] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1077] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1076] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1076] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1077] <... futex resumed>) = 0
[pid 1077] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1076] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1077] <... mount resumed>) = 0
[pid 1077] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1077] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1076] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1076] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1077] <... futex resumed>) = 0
[pid 1077] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1076] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1077] <... mount resumed>) = 0
[pid 1077] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1076] <... futex resumed>) = 0
[pid 1076] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1076] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1077] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1076] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1076] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1076] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1078], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1078
[pid 1076] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1077] <... umount2 resumed>) = 0
[pid 1076] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1078 attached
<unfinished ...>
[pid 1078] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1078] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1077] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1078] <... umount2 resumed>) = 0
[pid 1077] <... futex resumed>) = 0
[pid 1078] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1077] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1076] <... futex resumed>) = 0
[pid 1076] exit_group(0) = ?
[pid 1077] <... futex resumed>) = ?
[pid 1078] <... futex resumed>) = ?
[pid 1078] +++ exited with 0 +++
[pid 1077] +++ exited with 0 +++
[pid 1076] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1076, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1079
./strace-static-x86_64: Process 1079 attached
[pid 1079] set_robust_list(0x5555560865e0, 24) = 0
[pid 1079] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1079] setpgid(0, 0) = 0
[pid 1079] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1079] write(3, "1000", 4) = 4
[pid 1079] close(3) = 0
[pid 1079] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1079] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1079] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1079] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1080 attached
<unfinished ...>
[pid 1080] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1080] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1079] <... clone resumed>, parent_tid=[1080], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1080
[pid 1079] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1080] <... futex resumed>) = 0
[pid 1080] mkdir("./file0", 000 <unfinished ...>
[pid 1079] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1080] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1080] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1080] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1079] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1079] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1080] <... futex resumed>) = 0
[pid 1079] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1080] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1080] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1079] <... futex resumed>) = 0
[pid 1079] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1079] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1080] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1080] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1079] <... futex resumed>) = 0
[pid 1079] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1080] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1079] <... futex resumed>) = 0
[pid 1079] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1080] <... umount2 resumed>) = 0
[pid 1079] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1080] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1079] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1079] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1081], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1081
./strace-static-x86_64: Process 1081 attached
[pid 1080] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1079] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1079] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1081] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1081] umount2("./file0", MNT_DETACH) = 0
[pid 1081] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1079] <... futex resumed>) = 0
[pid 1079] exit_group(0 <unfinished ...>
[pid 1081] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1079] <... exit_group resumed>) = ?
[pid 1080] <... futex resumed>) = ?
[pid 1081] <... futex resumed>) = -1 (errno 18446744073709551555)
[pid 1080] +++ exited with 0 +++
[pid 1081] +++ exited with 0 +++
[pid 1079] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1079, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1082
./strace-static-x86_64: Process 1082 attached
[pid 1082] set_robust_list(0x5555560865e0, 24) = 0
[pid 1082] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1082] setpgid(0, 0) = 0
[pid 1082] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1082] write(3, "1000", 4) = 4
[pid 1082] close(3) = 0
[pid 1082] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1082] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1082] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1082] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1083 attached
, parent_tid=[1083], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1083
[pid 1083] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1083] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1082] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1083] <... futex resumed>) = 0
[pid 1083] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1083] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1083] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1082] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1082] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1083] <... futex resumed>) = 0
[pid 1082] <... futex resumed>) = 1
[pid 1083] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1082] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1083] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1083] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1082] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1082] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1083] <... futex resumed>) = 0
[pid 1083] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1082] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1083] <... mount resumed>) = 0
[pid 1083] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1082] <... futex resumed>) = 0
[pid 1083] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1082] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1083] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1082] <... futex resumed>) = 0
[pid 1082] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1082] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1082] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1082] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1083] <... umount2 resumed>) = 0
[pid 1083] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1082] <... clone resumed>, parent_tid=[1084], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1084
[pid 1083] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1082] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1082] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1084 attached
<unfinished ...>
[pid 1084] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1084] umount2("./file0", MNT_DETACH) = 0
[pid 1084] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1082] <... futex resumed>) = 0
[pid 1084] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1082] exit_group(0) = ?
[pid 1084] <... futex resumed>) = ?
[pid 1083] <... futex resumed>) = ?
[pid 1083] +++ exited with 0 +++
[pid 1084] +++ exited with 0 +++
[pid 1082] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1082, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1085
./strace-static-x86_64: Process 1085 attached
[pid 1085] set_robust_list(0x5555560865e0, 24) = 0
[pid 1085] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1085] setpgid(0, 0) = 0
[pid 1085] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1085] write(3, "1000", 4) = 4
[pid 1085] close(3) = 0
[pid 1085] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1085] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1085] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1085] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1086 attached
, parent_tid=[1086], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1086
[pid 1086] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1085] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1086] <... set_robust_list resumed>) = 0
[pid 1085] <... futex resumed>) = 0
[pid 1086] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1086] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1086] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1085] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1085] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1086] <... futex resumed>) = 0
[pid 1085] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1086] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1086] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1086] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1085] <... futex resumed>) = 0
[pid 1085] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1086] <... futex resumed>) = 0
[pid 1085] <... futex resumed>) = 1
[pid 1086] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1085] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1086] <... mount resumed>) = 0
[pid 1086] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1085] <... futex resumed>) = 0
[pid 1086] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1085] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1085] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1085] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1085] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1085] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1086] <... umount2 resumed>) = 0
[pid 1086] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1085] <... clone resumed>, parent_tid=[1087], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1087
[pid 1085] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1085] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1086] <... futex resumed>) = 0
[pid 1086] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1087 attached
<unfinished ...>
[pid 1087] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1087] umount2("./file0", MNT_DETACH) = 0
[pid 1087] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1085] <... futex resumed>) = 0
[pid 1085] exit_group(0 <unfinished ...>
[pid 1087] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1085] <... exit_group resumed>) = ?
[pid 1086] <... futex resumed>) = ?
[pid 1086] +++ exited with 0 +++
[pid 1087] <... futex resumed>) = ?
[pid 1087] +++ exited with 0 +++
[pid 1085] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1085, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1088
./strace-static-x86_64: Process 1088 attached
[pid 1088] set_robust_list(0x5555560865e0, 24) = 0
[pid 1088] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1088] setpgid(0, 0) = 0
[pid 1088] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1088] write(3, "1000", 4) = 4
[pid 1088] close(3) = 0
[pid 1088] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1088] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1088] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1088] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1089 attached
<unfinished ...>
[pid 1089] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1089] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1088] <... clone resumed>, parent_tid=[1089], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1089
[pid 1088] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1089] <... futex resumed>) = 0
[pid 1089] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1089] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1089] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1088] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1088] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1089] <... futex resumed>) = 0
[pid 1089] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1089] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1089] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1088] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1088] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1089] <... futex resumed>) = 0
[pid 1089] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1088] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1089] <... mount resumed>) = 0
[pid 1089] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1089] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1088] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1088] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1089] <... futex resumed>) = 0
[pid 1089] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1088] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1089] <... umount2 resumed>) = 0
[pid 1088] <... futex resumed>) = 0
[pid 1089] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1089] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1088] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1088] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1088] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1090 attached
, parent_tid=[1090], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1090
[pid 1090] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1090] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1088] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1090] <... futex resumed>) = 0
[pid 1090] umount2("./file0", MNT_DETACH) = 0
[pid 1088] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1090] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1090] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1088] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1088] exit_group(0 <unfinished ...>
[pid 1089] <... futex resumed>) = ?
[pid 1088] <... exit_group resumed>) = ?
[pid 1089] +++ exited with 0 +++
[pid 1090] <... futex resumed>) = ?
[pid 1090] +++ exited with 0 +++
[pid 1088] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1088, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1091
./strace-static-x86_64: Process 1091 attached
[pid 1091] set_robust_list(0x5555560865e0, 24) = 0
[pid 1091] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1091] setpgid(0, 0) = 0
[pid 1091] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1091] write(3, "1000", 4) = 4
[pid 1091] close(3) = 0
[pid 1091] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1091] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1091] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1091] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1092], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1092
[pid 1091] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1091] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1092 attached
<unfinished ...>
[pid 1092] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1092] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1092] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1091] <... futex resumed>) = 0
[pid 1091] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1091] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1092] <... futex resumed>) = 1
[pid 1092] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1092] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1091] <... futex resumed>) = 0
[pid 1091] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1092] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1091] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1092] <... mount resumed>) = 0
[pid 1092] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1091] <... futex resumed>) = 0
[pid 1092] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1091] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1091] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1091] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1091] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1091] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1093 attached
<unfinished ...>
[pid 1092] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1091] <... clone resumed>, parent_tid=[1093], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1093
[pid 1093] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1092] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1091] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1091] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1093] <... set_robust_list resumed>) = 0
[pid 1092] <... umount2 resumed>) = 0
[pid 1093] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1092] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1092] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1093] <... umount2 resumed>) = 0
[pid 1093] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1091] <... futex resumed>) = 0
[pid 1091] exit_group(0) = ?
[pid 1092] <... futex resumed>) = ?
[pid 1092] +++ exited with 0 +++
[pid 1093] +++ exited with 0 +++
[pid 1091] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1091, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1094
./strace-static-x86_64: Process 1094 attached
[pid 1094] set_robust_list(0x5555560865e0, 24) = 0
[pid 1094] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1094] setpgid(0, 0) = 0
[pid 1094] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1094] write(3, "1000", 4) = 4
[pid 1094] close(3) = 0
[pid 1094] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1094] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1094] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1094] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1095 attached
, parent_tid=[1095], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1095
[pid 1094] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1095] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1094] <... futex resumed>) = 0
[pid 1095] <... set_robust_list resumed>) = 0
[pid 1095] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1095] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1095] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1094] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1094] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1095] <... futex resumed>) = 0
[pid 1095] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1094] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1095] <... mount resumed>) = 0
[pid 1095] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1094] <... futex resumed>) = 0
[pid 1095] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1094] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1094] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1095] <... mount resumed>) = 0
[pid 1095] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1094] <... futex resumed>) = 0
[pid 1095] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1094] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1094] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1095] <... umount2 resumed>) = 0
[pid 1094] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1095] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1094] <... mmap resumed>) = 0x7f236e446000
[pid 1095] <... futex resumed>) = 0
[pid 1094] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1095] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1094] <... mprotect resumed>) = 0
[pid 1094] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1096 attached
, parent_tid=[1096], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1096
[pid 1096] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1096] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1094] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1096] <... futex resumed>) = 0
[pid 1094] <... futex resumed>) = 1
[pid 1096] umount2("./file0", MNT_DETACH) = 0
[pid 1094] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1096] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1096] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1094] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1094] exit_group(0 <unfinished ...>
[pid 1095] <... futex resumed>) = 231
[pid 1094] <... exit_group resumed>) = ?
[pid 1096] <... futex resumed>) = ?
[pid 1096] +++ exited with 0 +++
[pid 1095] +++ exited with 0 +++
[pid 1094] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1094, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1097
./strace-static-x86_64: Process 1097 attached
[pid 1097] set_robust_list(0x5555560865e0, 24) = 0
[pid 1097] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1097] setpgid(0, 0) = 0
[pid 1097] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1097] write(3, "1000", 4) = 4
[pid 1097] close(3) = 0
[pid 1097] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1097] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1097] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1097] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1098 attached
<unfinished ...>
[pid 1098] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1097] <... clone resumed>, parent_tid=[1098], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1098
[pid 1098] <... set_robust_list resumed>) = 0
[pid 1098] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1097] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1098] <... futex resumed>) = 0
[pid 1097] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1098] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1098] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1098] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1097] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1097] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1098] <... futex resumed>) = 0
[pid 1098] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1097] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1098] <... mount resumed>) = 0
[pid 1098] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1098] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1097] <... futex resumed>) = 0
[pid 1097] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1098] <... futex resumed>) = 0
[pid 1098] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1097] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1098] <... mount resumed>) = 0
[pid 1098] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1098] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1097] <... futex resumed>) = 0
[pid 1097] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1098] <... futex resumed>) = 0
[pid 1098] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1097] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1097] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1098] <... umount2 resumed>) = 0
[pid 1097] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1098] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1097] <... mprotect resumed>) = 0
[pid 1098] <... futex resumed>) = 0
[pid 1097] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1098] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1099 attached
<unfinished ...>
[pid 1097] <... clone resumed>, parent_tid=[1099], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1099
[pid 1099] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1097] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1099] <... set_robust_list resumed>) = 0
[pid 1097] <... futex resumed>) = 0
[pid 1099] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1097] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1099] <... umount2 resumed>) = 0
[pid 1099] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1099] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1097] <... futex resumed>) = 0
[pid 1097] exit_group(0) = ?
[pid 1098] <... futex resumed>) = ?
[pid 1098] +++ exited with 0 +++
[pid 1099] <... futex resumed>) = ?
[pid 1099] +++ exited with 0 +++
[pid 1097] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1097, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1100
./strace-static-x86_64: Process 1100 attached
[pid 1100] set_robust_list(0x5555560865e0, 24) = 0
[pid 1100] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1100] setpgid(0, 0) = 0
[pid 1100] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1100] write(3, "1000", 4) = 4
[pid 1100] close(3) = 0
[pid 1100] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1100] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1100] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1100] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1101], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1101
[pid 1100] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1100] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1101 attached
<unfinished ...>
[pid 1101] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1101] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1101] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1100] <... futex resumed>) = 0
[pid 1100] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1100] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1101] <... futex resumed>) = 1
[pid 1101] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1101] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1100] <... futex resumed>) = 0
[pid 1100] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1100] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1101] <... futex resumed>) = 1
[pid 1101] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1101] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1100] <... futex resumed>) = 0
[pid 1101] <... futex resumed>) = 1
[pid 1100] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1101] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1100] <... futex resumed>) = 0
[pid 1100] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1100] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1100] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1101] <... umount2 resumed>) = 0
[pid 1100] <... mprotect resumed>) = 0
[pid 1101] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1100] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1101] <... futex resumed>) = 0
[pid 1101] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1102 attached
<unfinished ...>
[pid 1100] <... clone resumed>, parent_tid=[1102], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1102
[pid 1102] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1100] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1102] <... set_robust_list resumed>) = 0
[pid 1100] <... futex resumed>) = 0
[pid 1102] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1100] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1102] <... umount2 resumed>) = 0
[pid 1102] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1100] <... futex resumed>) = 0
[pid 1100] exit_group(0 <unfinished ...>
[pid 1102] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1100] <... exit_group resumed>) = ?
[pid 1101] <... futex resumed>) = -1 (errno 18446744073709551414)
[pid 1102] <... futex resumed>) = ?
[pid 1101] +++ exited with 0 +++
[pid 1102] +++ exited with 0 +++
[pid 1100] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1100, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1103
./strace-static-x86_64: Process 1103 attached
[pid 1103] set_robust_list(0x5555560865e0, 24) = 0
[pid 1103] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1103] setpgid(0, 0) = 0
[pid 1103] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1103] write(3, "1000", 4) = 4
[pid 1103] close(3) = 0
[pid 1103] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1103] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1103] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1103] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1104 attached
<unfinished ...>
[pid 1104] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1103] <... clone resumed>, parent_tid=[1104], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1104
[pid 1104] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1103] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1104] <... futex resumed>) = 0
[pid 1104] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1104] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1104] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1103] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1103] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1104] <... futex resumed>) = 0
[pid 1104] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1103] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1104] <... mount resumed>) = 0
[pid 1104] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1104] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1103] <... futex resumed>) = 0
[pid 1103] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1103] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1104] <... futex resumed>) = 0
[pid 1104] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1104] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1103] <... futex resumed>) = 0
[pid 1104] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1103] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1104] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1103] <... futex resumed>) = 0
[pid 1104] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1103] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1103] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1103] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1103] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1105 attached
<unfinished ...>
[pid 1104] <... umount2 resumed>) = 0
[pid 1103] <... clone resumed>, parent_tid=[1105], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1105
[pid 1105] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1104] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1105] <... set_robust_list resumed>) = 0
[pid 1103] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1105] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1104] <... futex resumed>) = 0
[pid 1103] <... futex resumed>) = 0
[pid 1104] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1103] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1105] <... umount2 resumed>) = 0
[pid 1105] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1103] <... futex resumed>) = 0
[pid 1105] <... futex resumed>) = 1
[pid 1103] exit_group(0 <unfinished ...>
[pid 1105] ????() = 0xe7
[pid 1104] <... futex resumed>) = ?
[pid 1103] <... exit_group resumed>) = ?
[pid 1104] +++ exited with 0 +++
[pid 1105] +++ exited with 0 +++
[pid 1103] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1103, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1106
./strace-static-x86_64: Process 1106 attached
[pid 1106] set_robust_list(0x5555560865e0, 24) = 0
[pid 1106] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1106] setpgid(0, 0) = 0
[pid 1106] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1106] write(3, "1000", 4) = 4
[pid 1106] close(3) = 0
[pid 1106] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1106] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1106] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1106] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1107 attached
, parent_tid=[1107], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1107
[pid 1107] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1107] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1106] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1107] <... futex resumed>) = 0
[pid 1107] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1107] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1106] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1107] <... futex resumed>) = 0
[pid 1107] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1106] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1106] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1106] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1107] <... futex resumed>) = 0
[pid 1107] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1107] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1106] <... futex resumed>) = 0
[pid 1106] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1106] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1107] <... futex resumed>) = 1
[pid 1107] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1107] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1106] <... futex resumed>) = 0
[pid 1106] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1106] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1106] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1106] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1106] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1108], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1108
[pid 1106] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1106] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1107] <... futex resumed>) = 1
[pid 1107] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 1108 attached
) = 0
[pid 1107] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1108] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1107] <... futex resumed>) = 0
[pid 1108] <... set_robust_list resumed>) = 0
[pid 1107] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1108] umount2("./file0", MNT_DETACH) = 0
[pid 1108] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1106] <... futex resumed>) = 0
[pid 1106] exit_group(0) = ?
[pid 1107] <... futex resumed>) = ?
[pid 1107] +++ exited with 0 +++
[pid 1108] +++ exited with 0 +++
[pid 1106] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1106, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1109
./strace-static-x86_64: Process 1109 attached
[pid 1109] set_robust_list(0x5555560865e0, 24) = 0
[pid 1109] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1109] setpgid(0, 0) = 0
[pid 1109] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1109] write(3, "1000", 4) = 4
[pid 1109] close(3) = 0
[pid 1109] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1109] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1109] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1109] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1110], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1110
[pid 1109] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1109] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1110 attached
<unfinished ...>
[pid 1110] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1110] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1110] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1109] <... futex resumed>) = 0
[pid 1109] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1109] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1110] <... futex resumed>) = 1
[pid 1110] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1110] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1109] <... futex resumed>) = 0
[pid 1109] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1109] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1110] <... futex resumed>) = 1
[pid 1110] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1110] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1109] <... futex resumed>) = 0
[pid 1109] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1109] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1109] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1109] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1109] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1111 attached
, parent_tid=[1111], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1111
[pid 1111] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1109] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1110] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1109] <... futex resumed>) = 0
[pid 1109] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1111] <... set_robust_list resumed>) = 0
[pid 1111] umount2("./file0", MNT_DETACH) = 0
[pid 1110] <... umount2 resumed>) = 0
[pid 1111] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1109] <... futex resumed>) = 0
[pid 1111] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1110] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1110] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1109] exit_group(0) = ?
[pid 1111] <... futex resumed>) = ?
[pid 1111] +++ exited with 0 +++
[pid 1110] <... futex resumed>) = ?
[pid 1110] +++ exited with 0 +++
[pid 1109] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1109, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1112
./strace-static-x86_64: Process 1112 attached
[pid 1112] set_robust_list(0x5555560865e0, 24) = 0
[pid 1112] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1112] setpgid(0, 0) = 0
[pid 1112] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1112] write(3, "1000", 4) = 4
[pid 1112] close(3) = 0
[pid 1112] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1112] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1112] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1112] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1113 attached
<unfinished ...>
[pid 1113] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1112] <... clone resumed>, parent_tid=[1113], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1113
[pid 1113] <... set_robust_list resumed>) = 0
[pid 1112] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1112] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1113] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1113] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1112] <... futex resumed>) = 0
[pid 1113] <... futex resumed>) = 1
[pid 1112] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1113] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1112] <... futex resumed>) = 0
[pid 1112] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1113] <... mount resumed>) = 0
[pid 1113] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1112] <... futex resumed>) = 0
[pid 1113] <... futex resumed>) = 1
[pid 1112] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1113] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1112] <... futex resumed>) = 0
[pid 1112] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1113] <... mount resumed>) = 0
[pid 1113] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1112] <... futex resumed>) = 0
[pid 1112] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1112] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1112] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1112] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1113] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1112] <... mprotect resumed>) = 0
[pid 1112] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1114], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1114
[pid 1113] <... umount2 resumed>) = 0
[pid 1113] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1112] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1112] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1113] <... futex resumed>) = 0
./strace-static-x86_64: Process 1114 attached
[pid 1113] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1114] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1114] umount2("./file0", MNT_DETACH) = 0
[pid 1114] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1112] <... futex resumed>) = 0
[pid 1112] exit_group(0) = ?
[pid 1113] <... futex resumed>) = ? <unavailable>
[pid 1113] +++ exited with 0 +++
[pid 1114] <... futex resumed>) = ?
[pid 1114] +++ exited with 0 +++
[pid 1112] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1112, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1115
./strace-static-x86_64: Process 1115 attached
[pid 1115] set_robust_list(0x5555560865e0, 24) = 0
[pid 1115] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1115] setpgid(0, 0) = 0
[pid 1115] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1115] write(3, "1000", 4) = 4
[pid 1115] close(3) = 0
[pid 1115] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1115] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1115] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1115] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1116], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1116
[pid 1115] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1116 attached
) = 0
[pid 1116] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1116] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1115] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1116] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1116] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1115] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1115] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1116] <... futex resumed>) = 0
[pid 1115] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1116] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1116] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1116] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1115] <... futex resumed>) = 0
[pid 1115] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1116] <... futex resumed>) = 0
[pid 1115] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1116] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1116] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1115] <... futex resumed>) = 0
[pid 1115] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1116] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1115] <... futex resumed>) = 0
[pid 1115] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1116] <... umount2 resumed>) = 0
[pid 1115] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1116] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1115] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1116] <... futex resumed>) = 0
[pid 1115] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1116] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1117 attached
<unfinished ...>
[pid 1115] <... clone resumed>, parent_tid=[1117], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1117
[pid 1115] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1115] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1117] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1117] umount2("./file0", MNT_DETACH) = 0
[pid 1117] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1115] <... futex resumed>) = 0
[pid 1115] exit_group(0 <unfinished ...>
[pid 1117] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1115] <... exit_group resumed>) = ?
[pid 1116] <... futex resumed>) = ?
[pid 1116] +++ exited with 0 +++
[pid 1117] <... futex resumed>) = ?
[pid 1117] +++ exited with 0 +++
[pid 1115] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1115, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1118
./strace-static-x86_64: Process 1118 attached
[pid 1118] set_robust_list(0x5555560865e0, 24) = 0
[pid 1118] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1118] setpgid(0, 0) = 0
[pid 1118] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1118] write(3, "1000", 4) = 4
[pid 1118] close(3) = 0
[pid 1118] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1118] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1118] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1118] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1119 attached
, parent_tid=[1119], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1119
[pid 1119] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1118] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1119] <... set_robust_list resumed>) = 0
[pid 1118] <... futex resumed>) = 0
[pid 1118] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1119] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1119] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1118] <... futex resumed>) = 0
[pid 1119] <... futex resumed>) = 1
[pid 1118] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1119] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1118] <... futex resumed>) = 0
[pid 1118] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1119] <... mount resumed>) = 0
[pid 1119] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1118] <... futex resumed>) = 0
[pid 1119] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1118] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1118] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1119] <... mount resumed>) = 0
[pid 1119] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1118] <... futex resumed>) = 0
[pid 1118] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1119] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1118] <... futex resumed>) = 0
[pid 1118] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1118] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1118] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1118] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1120 attached
<unfinished ...>
[pid 1119] <... umount2 resumed>) = 0
[pid 1118] <... clone resumed>, parent_tid=[1120], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1120
[pid 1120] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1119] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1118] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1120] <... set_robust_list resumed>) = 0
[pid 1119] <... futex resumed>) = 0
[pid 1118] <... futex resumed>) = 0
[pid 1120] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1119] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1118] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1120] <... umount2 resumed>) = 0
[pid 1120] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1118] <... futex resumed>) = 0
[pid 1118] exit_group(0) = ?
[pid 1119] <... futex resumed>) = ?
[pid 1119] +++ exited with 0 +++
[pid 1120] +++ exited with 0 +++
[pid 1118] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1118, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1121
./strace-static-x86_64: Process 1121 attached
[pid 1121] set_robust_list(0x5555560865e0, 24) = 0
[pid 1121] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1121] setpgid(0, 0) = 0
[pid 1121] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1121] write(3, "1000", 4) = 4
[pid 1121] close(3) = 0
[pid 1121] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1121] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1121] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1121] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1122 attached
, parent_tid=[1122], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1122
[pid 1122] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1121] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1122] mkdir("./file0", 000 <unfinished ...>
[pid 1121] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1122] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1122] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1121] <... futex resumed>) = 0
[pid 1122] <... futex resumed>) = 1
[pid 1121] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1122] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1121] <... futex resumed>) = 0
[pid 1121] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1122] <... mount resumed>) = 0
[pid 1122] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1121] <... futex resumed>) = 0
[pid 1122] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1121] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1122] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1121] <... futex resumed>) = 0
[pid 1122] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1121] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1122] <... mount resumed>) = 0
[pid 1122] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1121] <... futex resumed>) = 0
[pid 1122] <... futex resumed>) = 1
[pid 1121] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1122] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1121] <... futex resumed>) = 0
[pid 1121] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1121] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1121] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1121] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1123 attached
<unfinished ...>
[pid 1123] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1121] <... clone resumed>, parent_tid=[1123], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1123
[pid 1123] <... set_robust_list resumed>) = 0
[pid 1122] <... umount2 resumed>) = 0
[pid 1121] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1123] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1122] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1121] <... futex resumed>) = 0
[pid 1121] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1122] <... futex resumed>) = 0
[pid 1122] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1123] <... umount2 resumed>) = 0
[pid 1123] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1121] <... futex resumed>) = 0
[pid 1123] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1121] exit_group(0) = ?
[pid 1122] <... futex resumed>) = ?
[pid 1122] +++ exited with 0 +++
[pid 1123] <... futex resumed>) = ?
[pid 1123] +++ exited with 0 +++
[pid 1121] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1121, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1124
./strace-static-x86_64: Process 1124 attached
[pid 1124] set_robust_list(0x5555560865e0, 24) = 0
[pid 1124] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1124] setpgid(0, 0) = 0
[pid 1124] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1124] write(3, "1000", 4) = 4
[pid 1124] close(3) = 0
[pid 1124] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1124] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1124] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1124] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1125], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1125
[pid 1124] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1124] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1125 attached
<unfinished ...>
[pid 1125] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1125] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1125] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1124] <... futex resumed>) = 0
[pid 1124] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1124] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1125] <... futex resumed>) = 1
[pid 1125] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1125] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1124] <... futex resumed>) = 0
[pid 1124] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1124] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1125] <... futex resumed>) = 1
[pid 1125] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1125] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1124] <... futex resumed>) = 0
[pid 1124] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1124] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1124] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1124] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1124] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1126 attached
, parent_tid=[1126], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1126
[pid 1124] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1124] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1125] <... futex resumed>) = 1
[pid 1125] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1126] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1125] <... umount2 resumed>) = 0
[pid 1126] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1125] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1125] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1126] <... umount2 resumed>) = 0
[pid 1126] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1124] <... futex resumed>) = 0
[pid 1124] exit_group(0) = ?
[pid 1125] <... futex resumed>) = ?
[pid 1126] +++ exited with 0 +++
[pid 1125] +++ exited with 0 +++
[pid 1124] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1124, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1127
./strace-static-x86_64: Process 1127 attached
[pid 1127] set_robust_list(0x5555560865e0, 24) = 0
[pid 1127] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1127] setpgid(0, 0) = 0
[pid 1127] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1127] write(3, "1000", 4) = 4
[pid 1127] close(3) = 0
[pid 1127] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1127] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1127] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1127] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1128 attached
, parent_tid=[1128], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1128
[pid 1128] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1128] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1127] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1128] <... futex resumed>) = 0
[pid 1128] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1128] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1128] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1127] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1127] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1128] <... futex resumed>) = 0
[pid 1128] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1127] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1128] <... mount resumed>) = 0
[pid 1128] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1128] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1127] <... futex resumed>) = 0
[pid 1127] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1128] <... futex resumed>) = 0
[pid 1128] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1127] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1128] <... mount resumed>) = 0
[pid 1128] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1127] <... futex resumed>) = 0
[pid 1128] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1127] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1128] <... futex resumed>) = 0
[pid 1128] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1127] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1128] <... umount2 resumed>) = 0
[pid 1128] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1128] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1127] <... futex resumed>) = 0
[pid 1127] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1127] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1127] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1129 attached
<unfinished ...>
[pid 1129] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1129] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1127] <... clone resumed>, parent_tid=[1129], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1129
[pid 1127] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1129] <... futex resumed>) = 0
[pid 1129] umount2("./file0", MNT_DETACH) = 0
[pid 1129] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1129] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1127] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1127] exit_group(0) = ?
[pid 1128] <... futex resumed>) = ?
[pid 1128] +++ exited with 0 +++
[pid 1129] <... futex resumed>) = ?
[pid 1129] +++ exited with 0 +++
[pid 1127] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1127, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1130
./strace-static-x86_64: Process 1130 attached
[pid 1130] set_robust_list(0x5555560865e0, 24) = 0
[pid 1130] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1130] setpgid(0, 0) = 0
[pid 1130] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1130] write(3, "1000", 4) = 4
[pid 1130] close(3) = 0
[pid 1130] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1130] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1130] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1130] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1131 attached
, parent_tid=[1131], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1131
[pid 1131] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1131] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1130] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1131] <... futex resumed>) = 0
[pid 1131] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1130] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1131] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1130] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1130] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1131] <... futex resumed>) = 0
[pid 1131] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1130] <... futex resumed>) = 0
[pid 1130] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1131] <... mount resumed>) = 0
[pid 1131] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1131] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1130] <... futex resumed>) = 0
[pid 1130] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1131] <... futex resumed>) = 0
[pid 1130] <... futex resumed>) = 1
[pid 1131] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1130] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1131] <... mount resumed>) = 0
[pid 1131] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1130] <... futex resumed>) = 0
[pid 1131] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1130] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1131] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1130] <... futex resumed>) = 0
[pid 1131] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1130] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1130] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1130] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1130] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1132], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1132
[pid 1130] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1130] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1131] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 1132 attached
[pid 1131] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1131] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1132] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1132] umount2("./file0", MNT_DETACH) = 0
[pid 1132] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1130] <... futex resumed>) = 0
[pid 1130] exit_group(0) = ?
[pid 1131] <... futex resumed>) = ?
[pid 1131] +++ exited with 0 +++
[pid 1132] +++ exited with 0 +++
[pid 1130] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1130, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1133 attached
, child_tidptr=0x5555560865d0) = 1133
[pid 1133] set_robust_list(0x5555560865e0, 24) = 0
[pid 1133] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1133] setpgid(0, 0) = 0
[pid 1133] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1133] write(3, "1000", 4) = 4
[pid 1133] close(3) = 0
[pid 1133] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1133] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1133] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1133] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1134 attached
, parent_tid=[1134], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1134
[pid 1133] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1133] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1134] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1134] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1134] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1133] <... futex resumed>) = 0
[pid 1134] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1133] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1133] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1134] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1134] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1134] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1133] <... futex resumed>) = 0
[pid 1133] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1133] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1134] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1134] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1133] <... futex resumed>) = 0
[pid 1134] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1133] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1133] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1133] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1133] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1134] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1133] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1134] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1133] <... clone resumed>, parent_tid=[1135], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1135
[pid 1133] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1133] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1135 attached
<unfinished ...>
[pid 1135] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1134] <... umount2 resumed>) = 0
[pid 1135] <... set_robust_list resumed>) = 0
[pid 1135] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1134] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1135] <... umount2 resumed>) = 0
[pid 1135] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1133] <... futex resumed>) = 0
[pid 1133] exit_group(0) = ?
[pid 1134] +++ exited with 0 +++
[pid 1135] <... futex resumed>) = ?
[pid 1135] +++ exited with 0 +++
[pid 1133] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1133, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1136
./strace-static-x86_64: Process 1136 attached
[pid 1136] set_robust_list(0x5555560865e0, 24) = 0
[pid 1136] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1136] setpgid(0, 0) = 0
[pid 1136] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1136] write(3, "1000", 4) = 4
[pid 1136] close(3) = 0
[pid 1136] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1136] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1136] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1136] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1137 attached
<unfinished ...>
[pid 1137] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1136] <... clone resumed>, parent_tid=[1137], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1137
[pid 1137] <... set_robust_list resumed>) = 0
[pid 1136] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1136] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1137] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1137] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1136] <... futex resumed>) = 0
[pid 1136] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1136] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1137] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1137] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1136] <... futex resumed>) = 0
[pid 1136] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1136] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1137] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1137] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1136] <... futex resumed>) = 0
[pid 1136] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1136] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1136] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1136] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1136] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1137] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1136] <... clone resumed>, parent_tid=[1138], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1138
[pid 1136] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1136] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1138 attached
<unfinished ...>
[pid 1138] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1138] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1137] <... umount2 resumed>) = 0
[pid 1137] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1138] <... umount2 resumed>) = 0
[pid 1138] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1136] <... futex resumed>) = 0
[pid 1136] exit_group(0 <unfinished ...>
[pid 1137] <... futex resumed>) = 0
[pid 1136] <... exit_group resumed>) = ?
[pid 1138] <... futex resumed>) = ?
[pid 1138] +++ exited with 0 +++
[pid 1137] +++ exited with 0 +++
[pid 1136] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1136, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1139
./strace-static-x86_64: Process 1139 attached
[pid 1139] set_robust_list(0x5555560865e0, 24) = 0
[pid 1139] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1139] setpgid(0, 0) = 0
[pid 1139] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1139] write(3, "1000", 4) = 4
[pid 1139] close(3) = 0
[pid 1139] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1139] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1139] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1139] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1140 attached
, parent_tid=[1140], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1140
[pid 1140] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1139] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1140] <... set_robust_list resumed>) = 0
[pid 1139] <... futex resumed>) = 0
[pid 1139] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1140] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1140] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1139] <... futex resumed>) = 0
[pid 1140] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1139] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1140] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1139] <... futex resumed>) = 0
[pid 1140] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1139] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1140] <... mount resumed>) = 0
[pid 1140] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1139] <... futex resumed>) = 0
[pid 1140] <... futex resumed>) = 1
[pid 1139] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1140] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1139] <... futex resumed>) = 0
[pid 1139] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1140] <... mount resumed>) = 0
[pid 1140] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1139] <... futex resumed>) = 0
[pid 1140] <... futex resumed>) = 1
[pid 1139] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1140] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1139] <... futex resumed>) = 0
[pid 1139] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1139] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1139] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1139] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1140] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 1141 attached
[pid 1140] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1141] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1140] <... futex resumed>) = 0
[pid 1139] <... clone resumed>, parent_tid=[1141], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1141
[pid 1141] <... set_robust_list resumed>) = 0
[pid 1140] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1139] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1141] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1139] <... futex resumed>) = 0
[pid 1139] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1141] <... umount2 resumed>) = 0
[pid 1141] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1139] <... futex resumed>) = 0
[pid 1141] <... futex resumed>) = 1
[pid 1141] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1139] exit_group(0 <unfinished ...>
[pid 1141] <... futex resumed>) = ?
[pid 1140] <... futex resumed>) = ?
[pid 1139] <... exit_group resumed>) = ?
[pid 1140] +++ exited with 0 +++
[pid 1141] +++ exited with 0 +++
[pid 1139] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1139, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1142
./strace-static-x86_64: Process 1142 attached
[pid 1142] set_robust_list(0x5555560865e0, 24) = 0
[pid 1142] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1142] setpgid(0, 0) = 0
[pid 1142] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1142] write(3, "1000", 4) = 4
[pid 1142] close(3) = 0
[pid 1142] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1142] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1142] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1142] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1143 attached
, parent_tid=[1143], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1143
[pid 1143] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1143] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1142] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1143] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1142] <... futex resumed>) = 0
[pid 1143] mkdir("./file0", 000 <unfinished ...>
[pid 1142] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1143] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1143] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1143] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1142] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1142] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1143] <... futex resumed>) = 0
[pid 1143] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1142] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1143] <... mount resumed>) = 0
[pid 1143] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1143] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1142] <... futex resumed>) = 0
[pid 1142] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1143] <... futex resumed>) = 0
[pid 1143] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1142] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1143] <... mount resumed>) = 0
[pid 1143] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1142] <... futex resumed>) = 0
[pid 1142] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1142] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1142] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1142] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1142] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1143] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1142] <... clone resumed>, parent_tid=[1144], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1144
[pid 1142] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1143] <... umount2 resumed>) = 0
[pid 1142] <... futex resumed>) = 0
[pid 1142] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1144 attached
<unfinished ...>
[pid 1144] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1143] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1144] <... set_robust_list resumed>) = 0
[pid 1144] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1143] <... futex resumed>) = 0
[pid 1143] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1144] <... umount2 resumed>) = 0
[pid 1144] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1142] <... futex resumed>) = 0
[pid 1144] <... futex resumed>) = 1
[pid 1142] exit_group(0) = ?
[pid 1143] <... futex resumed>) = ?
[pid 1143] +++ exited with 0 +++
[pid 1144] +++ exited with 0 +++
[pid 1142] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1142, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1145 attached
, child_tidptr=0x5555560865d0) = 1145
[pid 1145] set_robust_list(0x5555560865e0, 24) = 0
[pid 1145] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1145] setpgid(0, 0) = 0
[pid 1145] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1145] write(3, "1000", 4) = 4
[pid 1145] close(3) = 0
[pid 1145] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1145] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1145] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1145] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1146 attached
<unfinished ...>
[pid 1146] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1146] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1145] <... clone resumed>, parent_tid=[1146], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1146
[pid 1145] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1146] <... futex resumed>) = 0
[pid 1146] mkdir("./file0", 000 <unfinished ...>
[pid 1145] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1146] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1146] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1146] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1145] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1145] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1146] <... futex resumed>) = 0
[pid 1146] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1145] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1146] <... mount resumed>) = 0
[pid 1146] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1146] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1145] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1145] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1146] <... futex resumed>) = 0
[pid 1146] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1145] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1146] <... mount resumed>) = 0
[pid 1146] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1146] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1145] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1145] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1146] <... futex resumed>) = 0
[pid 1146] umount2("./file0", MNT_DETACH) = 0
[pid 1145] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1146] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1146] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1145] <... futex resumed>) = 0
[pid 1145] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1145] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1145] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1147 attached
, parent_tid=[1147], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1147
[pid 1147] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1147] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1145] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1147] <... futex resumed>) = 0
[pid 1145] <... futex resumed>) = 1
[pid 1147] umount2("./file0", MNT_DETACH) = 0
[pid 1147] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1147] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1145] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1145] exit_group(0 <unfinished ...>
[pid 1146] <... futex resumed>) = ?
[pid 1145] <... exit_group resumed>) = ?
[pid 1146] +++ exited with 0 +++
[pid 1147] <... futex resumed>) = ?
[pid 1147] +++ exited with 0 +++
[pid 1145] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1145, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1148
./strace-static-x86_64: Process 1148 attached
[pid 1148] set_robust_list(0x5555560865e0, 24) = 0
[pid 1148] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1148] setpgid(0, 0) = 0
[pid 1148] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1148] write(3, "1000", 4) = 4
[pid 1148] close(3) = 0
[pid 1148] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1148] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1148] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1148] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1149 attached
, parent_tid=[1149], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1149
[pid 1149] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1148] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1149] <... set_robust_list resumed>) = 0
[pid 1148] <... futex resumed>) = 0
[pid 1148] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1149] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1149] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1148] <... futex resumed>) = 0
[pid 1149] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1148] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1148] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1149] <... mount resumed>) = 0
[pid 1149] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1148] <... futex resumed>) = 0
[pid 1149] <... futex resumed>) = 1
[pid 1148] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1149] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1148] <... futex resumed>) = 0
[pid 1148] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1149] <... mount resumed>) = 0
[pid 1149] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1148] <... futex resumed>) = 0
[pid 1149] <... futex resumed>) = 1
[pid 1148] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1149] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1148] <... futex resumed>) = 0
[pid 1148] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1148] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1148] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1148] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1149] <... umount2 resumed>) = 0
[pid 1149] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1150 attached
) = 0
[pid 1148] <... clone resumed>, parent_tid=[1150], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1150
[pid 1150] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1149] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1148] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1150] <... set_robust_list resumed>) = 0
[pid 1148] <... futex resumed>) = 0
[pid 1150] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1148] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1150] <... umount2 resumed>) = 0
[pid 1150] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1148] <... futex resumed>) = 0
[pid 1150] <... futex resumed>) = 1
[pid 1148] exit_group(0) = ?
[pid 1149] <... futex resumed>) = ?
[pid 1149] +++ exited with 0 +++
[pid 1150] +++ exited with 0 +++
[pid 1148] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1148, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1151
./strace-static-x86_64: Process 1151 attached
[pid 1151] set_robust_list(0x5555560865e0, 24) = 0
[pid 1151] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1151] setpgid(0, 0) = 0
[pid 1151] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1151] write(3, "1000", 4) = 4
[pid 1151] close(3) = 0
[pid 1151] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1151] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1151] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1151] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1152 attached
, parent_tid=[1152], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1152
[pid 1152] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1152] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1151] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1152] <... futex resumed>) = 0
[pid 1151] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1152] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1152] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1152] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1151] <... futex resumed>) = 0
[pid 1151] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1152] <... futex resumed>) = 0
[pid 1151] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1152] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1152] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1152] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1151] <... futex resumed>) = 0
[pid 1151] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1152] <... futex resumed>) = 0
[pid 1151] <... futex resumed>) = 1
[pid 1152] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1151] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1152] <... mount resumed>) = 0
[pid 1152] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1151] <... futex resumed>) = 0
[pid 1151] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1151] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1152] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1151] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1151] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1151] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1152] <... umount2 resumed>) = 0
[pid 1152] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1151] <... clone resumed>, parent_tid=[1153], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1153
[pid 1151] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1151] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1152] <... futex resumed>) = 0
[pid 1152] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1153 attached
<unfinished ...>
[pid 1153] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1153] umount2("./file0", MNT_DETACH) = 0
[pid 1153] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1151] <... futex resumed>) = 0
[pid 1151] exit_group(0) = ?
[pid 1153] <... futex resumed>) = ?
[pid 1152] <... futex resumed>) = 231
[pid 1153] +++ exited with 0 +++
[pid 1152] +++ exited with 0 +++
[pid 1151] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1151, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1154
./strace-static-x86_64: Process 1154 attached
[pid 1154] set_robust_list(0x5555560865e0, 24) = 0
[pid 1154] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1154] setpgid(0, 0) = 0
[pid 1154] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1154] write(3, "1000", 4) = 4
[pid 1154] close(3) = 0
[pid 1154] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1154] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1154] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1154] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1155 attached
, parent_tid=[1155], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1155
[pid 1155] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1154] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1155] <... set_robust_list resumed>) = 0
[pid 1154] <... futex resumed>) = 0
[pid 1154] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1155] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1155] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1154] <... futex resumed>) = 0
[pid 1155] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1154] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1154] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1155] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1155] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1155] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1154] <... futex resumed>) = 0
[pid 1155] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1154] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1155] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1154] <... futex resumed>) = 0
[pid 1155] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1154] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1155] <... mount resumed>) = 0
[pid 1155] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1154] <... futex resumed>) = 0
[pid 1154] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1154] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1154] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1154] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1155] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1154] <... mprotect resumed>) = 0
[pid 1154] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1156], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1156
[pid 1155] <... umount2 resumed>) = 0
[pid 1154] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1154] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1156 attached
<unfinished ...>
[pid 1156] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1156] umount2("./file0", MNT_DETACH) = 0
[pid 1156] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1154] <... futex resumed>) = 0
[pid 1155] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1156] <... futex resumed>) = 1
[pid 1156] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1155] <... futex resumed>) = 0
[pid 1155] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1154] exit_group(0 <unfinished ...>
[pid 1155] <... futex resumed>) = ?
[pid 1154] <... exit_group resumed>) = ?
[pid 1156] <... futex resumed>) = ?
[pid 1156] +++ exited with 0 +++
[pid 1155] +++ exited with 0 +++
[pid 1154] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1154, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1157
./strace-static-x86_64: Process 1157 attached
[pid 1157] set_robust_list(0x5555560865e0, 24) = 0
[pid 1157] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1157] setpgid(0, 0) = 0
[pid 1157] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1157] write(3, "1000", 4) = 4
[pid 1157] close(3) = 0
[pid 1157] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1157] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1157] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1157] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1158 attached
, parent_tid=[1158], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1158
[pid 1158] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1157] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1158] <... set_robust_list resumed>) = 0
[pid 1157] <... futex resumed>) = 0
[pid 1157] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1158] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1158] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1157] <... futex resumed>) = 0
[pid 1158] <... futex resumed>) = 1
[pid 1157] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1158] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1157] <... futex resumed>) = 0
[pid 1157] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1158] <... mount resumed>) = 0
[pid 1158] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1157] <... futex resumed>) = 0
[pid 1157] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1157] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1158] <... futex resumed>) = 1
[pid 1158] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1158] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1157] <... futex resumed>) = 0
[pid 1158] <... futex resumed>) = 1
[pid 1157] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1158] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1157] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1157] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1157] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1157] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1159 attached
<unfinished ...>
[pid 1158] <... umount2 resumed>) = 0
[pid 1159] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1158] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1157] <... clone resumed>, parent_tid=[1159], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1159
[pid 1158] <... futex resumed>) = 0
[pid 1157] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1159] <... set_robust_list resumed>) = 0
[pid 1157] <... futex resumed>) = 0
[pid 1158] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1157] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1159] umount2("./file0", MNT_DETACH) = 0
[pid 1159] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1157] <... futex resumed>) = 0
[pid 1157] exit_group(0) = ?
[pid 1158] <... futex resumed>) = ?
[pid 1158] +++ exited with 0 +++
[pid 1159] +++ exited with 0 +++
[pid 1157] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1157, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1160
./strace-static-x86_64: Process 1160 attached
[pid 1160] set_robust_list(0x5555560865e0, 24) = 0
[pid 1160] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1160] setpgid(0, 0) = 0
[pid 1160] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1160] write(3, "1000", 4) = 4
[pid 1160] close(3) = 0
[pid 1160] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1160] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1160] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1160] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1161 attached
<unfinished ...>
[pid 1161] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1161] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1160] <... clone resumed>, parent_tid=[1161], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1161
[pid 1160] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1161] <... futex resumed>) = 0
[pid 1161] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1161] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1161] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1160] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1160] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1161] <... futex resumed>) = 0
[pid 1161] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1160] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1161] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1161] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1160] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1160] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1161] <... futex resumed>) = 0
[pid 1161] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1160] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1161] <... mount resumed>) = 0
[pid 1161] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1161] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1160] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1160] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1161] <... futex resumed>) = 0
[pid 1161] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1160] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1161] <... umount2 resumed>) = 0
[pid 1161] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1161] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1160] <... futex resumed>) = 0
[pid 1160] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1160] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1160] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1162 attached
<unfinished ...>
[pid 1162] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1162] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1160] <... clone resumed>, parent_tid=[1162], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1162
[pid 1160] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1162] <... futex resumed>) = 0
[pid 1162] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1160] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1162] <... umount2 resumed>) = 0
[pid 1162] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1162] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1160] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1160] exit_group(0 <unfinished ...>
[pid 1161] <... futex resumed>) = ?
[pid 1160] <... exit_group resumed>) = ?
[pid 1161] +++ exited with 0 +++
[pid 1162] <... futex resumed>) = ?
[pid 1162] +++ exited with 0 +++
[pid 1160] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1160, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1163
./strace-static-x86_64: Process 1163 attached
[pid 1163] set_robust_list(0x5555560865e0, 24) = 0
[pid 1163] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1163] setpgid(0, 0) = 0
[pid 1163] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1163] write(3, "1000", 4) = 4
[pid 1163] close(3) = 0
[pid 1163] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1163] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1163] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1163] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1164 attached
, parent_tid=[1164], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1164
[pid 1164] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1163] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1163] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1164] <... set_robust_list resumed>) = 0
[pid 1164] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1164] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1163] <... futex resumed>) = 0
[pid 1163] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1163] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1164] <... futex resumed>) = 1
[pid 1164] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1164] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1163] <... futex resumed>) = 0
[pid 1163] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1163] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1164] <... futex resumed>) = 1
[pid 1164] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1164] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1163] <... futex resumed>) = 0
[pid 1164] <... futex resumed>) = 1
[pid 1163] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1164] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1163] <... futex resumed>) = 0
[pid 1163] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1163] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1163] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1163] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1165], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1165
./strace-static-x86_64: Process 1165 attached
[pid 1164] <... umount2 resumed>) = 0
[pid 1163] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1165] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1164] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1163] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1164] <... futex resumed>) = 0
[pid 1164] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1165] <... set_robust_list resumed>) = 0
[pid 1165] umount2("./file0", MNT_DETACH) = 0
[pid 1165] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1163] <... futex resumed>) = 0
[pid 1165] <... futex resumed>) = 1
[pid 1163] exit_group(0 <unfinished ...>
[pid 1165] ????( <unfinished ...>
[pid 1163] <... exit_group resumed>) = ?
[pid 1164] <... futex resumed>) = ?
[pid 1165] <... ???? resumed>) = ?
[pid 1164] +++ exited with 0 +++
[pid 1165] +++ exited with 0 +++
[pid 1163] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1163, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1166
./strace-static-x86_64: Process 1166 attached
[pid 1166] set_robust_list(0x5555560865e0, 24) = 0
[pid 1166] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1166] setpgid(0, 0) = 0
[pid 1166] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1166] write(3, "1000", 4) = 4
[pid 1166] close(3) = 0
[pid 1166] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1166] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1166] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1166] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1167 attached
, parent_tid=[1167], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1167
[pid 1167] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1167] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1166] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1167] <... futex resumed>) = 0
[pid 1167] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1167] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1167] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1166] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1166] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1167] <... futex resumed>) = 0
[pid 1167] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1166] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1167] <... mount resumed>) = 0
[pid 1167] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1167] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1166] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1166] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1167] <... futex resumed>) = 0
[pid 1167] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1166] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1167] <... mount resumed>) = 0
[pid 1167] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1167] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1166] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1166] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1167] <... futex resumed>) = 0
[pid 1167] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1166] <... futex resumed>) = 1
[pid 1167] <... umount2 resumed>) = 0
[pid 1166] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1167] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1167] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1166] <... futex resumed>) = 0
[pid 1166] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1166] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1166] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1168 attached
, parent_tid=[1168], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1168
[pid 1168] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1168] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1166] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1168] <... futex resumed>) = 0
[pid 1168] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1166] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1168] <... umount2 resumed>) = 0
[pid 1168] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1168] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1166] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1166] exit_group(0 <unfinished ...>
[pid 1167] <... futex resumed>) = ?
[pid 1166] <... exit_group resumed>) = ?
[pid 1167] +++ exited with 0 +++
[pid 1168] <... futex resumed>) = ?
[pid 1168] +++ exited with 0 +++
[pid 1166] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1166, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1169 attached
, child_tidptr=0x5555560865d0) = 1169
[pid 1169] set_robust_list(0x5555560865e0, 24) = 0
[pid 1169] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1169] setpgid(0, 0) = 0
[pid 1169] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1169] write(3, "1000", 4) = 4
[pid 1169] close(3) = 0
[pid 1169] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1169] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1169] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1169] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1170 attached
, parent_tid=[1170], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1170
[pid 1170] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1169] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1170] <... set_robust_list resumed>) = 0
[pid 1169] <... futex resumed>) = 0
[pid 1169] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1170] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1170] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1169] <... futex resumed>) = 0
[pid 1170] <... futex resumed>) = 1
[pid 1169] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1170] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1169] <... futex resumed>) = 0
[pid 1169] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1170] <... mount resumed>) = 0
[pid 1170] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1169] <... futex resumed>) = 0
[pid 1169] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1170] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1169] <... futex resumed>) = 0
[pid 1169] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1170] <... mount resumed>) = 0
[pid 1170] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1169] <... futex resumed>) = 0
[pid 1170] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1169] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1169] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1169] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1169] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1170] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1170] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1169] <... mprotect resumed>) = 0
[pid 1169] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1170] <... umount2 resumed>) = 0
[pid 1170] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1169] <... clone resumed>, parent_tid=[1171], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1171
[pid 1170] <... futex resumed>) = 0
[pid 1169] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1169] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1171 attached
<unfinished ...>
[pid 1171] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1171] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1170] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1171] <... umount2 resumed>) = 0
[pid 1171] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1169] <... futex resumed>) = 0
[pid 1169] exit_group(0) = ?
[pid 1170] <... futex resumed>) = ?
[pid 1171] <... futex resumed>) = ?
[pid 1170] +++ exited with 0 +++
[pid 1171] +++ exited with 0 +++
[pid 1169] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1169, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1172
./strace-static-x86_64: Process 1172 attached
[pid 1172] set_robust_list(0x5555560865e0, 24) = 0
[pid 1172] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1172] setpgid(0, 0) = 0
[pid 1172] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1172] write(3, "1000", 4) = 4
[pid 1172] close(3) = 0
[pid 1172] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1172] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1172] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1172] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1173 attached
, parent_tid=[1173], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1173
[pid 1173] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1172] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1173] <... set_robust_list resumed>) = 0
[pid 1172] <... futex resumed>) = 0
[pid 1172] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1173] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1173] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1172] <... futex resumed>) = 0
[pid 1173] <... futex resumed>) = 1
[pid 1172] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1173] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1172] <... futex resumed>) = 0
[pid 1172] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1173] <... mount resumed>) = 0
[pid 1173] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1172] <... futex resumed>) = 0
[pid 1173] <... futex resumed>) = 1
[pid 1172] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1173] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1172] <... futex resumed>) = 0
[pid 1172] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1173] <... mount resumed>) = 0
[pid 1173] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1172] <... futex resumed>) = 0
[pid 1172] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1172] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1172] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1172] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1173] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1172] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1174], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1174
[pid 1172] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1172] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1173] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 1174 attached
[pid 1174] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1174] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1173] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1174] <... umount2 resumed>) = 0
[pid 1173] <... futex resumed>) = 0
[pid 1174] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1172] <... futex resumed>) = 0
[pid 1173] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1172] exit_group(0) = ?
[pid 1173] <... futex resumed>) = ?
[pid 1173] +++ exited with 0 +++
[pid 1174] <... futex resumed>) = ?
[pid 1174] +++ exited with 0 +++
[pid 1172] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1172, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1175
./strace-static-x86_64: Process 1175 attached
[pid 1175] set_robust_list(0x5555560865e0, 24) = 0
[pid 1175] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1175] setpgid(0, 0) = 0
[pid 1175] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1175] write(3, "1000", 4) = 4
[pid 1175] close(3) = 0
[pid 1175] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1175] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1175] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1175] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1176], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1176
[pid 1175] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1175] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1176 attached
<unfinished ...>
[pid 1176] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1176] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1176] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1175] <... futex resumed>) = 0
[pid 1175] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1175] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1176] <... futex resumed>) = 1
[pid 1176] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1176] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1175] <... futex resumed>) = 0
[pid 1175] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1176] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1175] <... futex resumed>) = 0
[pid 1175] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1176] <... mount resumed>) = 0
[pid 1176] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1175] <... futex resumed>) = 0
[pid 1175] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1175] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1175] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1175] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1175] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1176] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1175] <... clone resumed>, parent_tid=[1177], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1177
[pid 1175] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1176] <... umount2 resumed>) = 0
[pid 1175] <... futex resumed>) = 0
[pid 1175] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1177 attached
<unfinished ...>
[pid 1176] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1177] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1176] <... futex resumed>) = 0
[pid 1177] <... set_robust_list resumed>) = 0
[pid 1177] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1176] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1177] <... umount2 resumed>) = 0
[pid 1177] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1175] <... futex resumed>) = 0
[pid 1175] exit_group(0 <unfinished ...>
[pid 1176] <... futex resumed>) = ?
[pid 1175] <... exit_group resumed>) = ?
[pid 1176] +++ exited with 0 +++
[pid 1177] +++ exited with 0 +++
[pid 1175] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1175, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1178
./strace-static-x86_64: Process 1178 attached
[pid 1178] set_robust_list(0x5555560865e0, 24) = 0
[pid 1178] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1178] setpgid(0, 0) = 0
[pid 1178] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1178] write(3, "1000", 4) = 4
[pid 1178] close(3) = 0
[pid 1178] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1178] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1178] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1178] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1179], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1179
./strace-static-x86_64: Process 1179 attached
[pid 1179] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1179] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1178] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1179] <... futex resumed>) = 0
[pid 1179] mkdir("./file0", 000 <unfinished ...>
[pid 1178] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1179] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1179] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1179] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1178] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1178] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1179] <... futex resumed>) = 0
[pid 1179] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1178] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1179] <... mount resumed>) = 0
[pid 1179] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1179] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1178] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1178] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1179] <... futex resumed>) = 0
[pid 1179] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1178] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1179] <... mount resumed>) = 0
[pid 1179] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1179] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1178] <... futex resumed>) = 0
[pid 1178] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1178] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1178] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1178] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1178] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1179] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1178] <... clone resumed>, parent_tid=[1180], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1180
[pid 1178] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1178] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1180 attached
<unfinished ...>
[pid 1180] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1179] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1180] <... set_robust_list resumed>) = 0
[pid 1180] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1179] <... umount2 resumed>) = -1 EINVAL (Invalid argument)
[pid 1179] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1180] <... umount2 resumed>) = 0
[pid 1179] <... futex resumed>) = 0
[pid 1180] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1178] <... futex resumed>) = 0
[pid 1178] exit_group(0 <unfinished ...>
[pid 1179] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1178] <... exit_group resumed>) = ?
[pid 1180] <... futex resumed>) = ?
[pid 1179] <... futex resumed>) = ?
[pid 1180] +++ exited with 0 +++
[pid 1179] +++ exited with 0 +++
[pid 1178] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1178, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1181
./strace-static-x86_64: Process 1181 attached
[pid 1181] set_robust_list(0x5555560865e0, 24) = 0
[pid 1181] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1181] setpgid(0, 0) = 0
[pid 1181] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1181] write(3, "1000", 4) = 4
[pid 1181] close(3) = 0
[pid 1181] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1181] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1181] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1181] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1182 attached
, parent_tid=[1182], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1182
[pid 1182] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1181] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1182] <... set_robust_list resumed>) = 0
[pid 1181] <... futex resumed>) = 0
[pid 1181] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1182] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1182] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1181] <... futex resumed>) = 0
[pid 1182] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1181] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1182] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1181] <... futex resumed>) = 0
[pid 1182] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1181] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1182] <... mount resumed>) = 0
[pid 1182] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1181] <... futex resumed>) = 0
[pid 1182] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1181] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1182] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1181] <... futex resumed>) = 0
[pid 1182] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1181] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1182] <... mount resumed>) = 0
[pid 1182] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1181] <... futex resumed>) = 0
[pid 1181] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1182] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1181] <... futex resumed>) = 0
[pid 1181] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1181] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1181] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1182] <... umount2 resumed>) = 0
[pid 1181] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1182] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 1183 attached
[pid 1182] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1181] <... clone resumed>, parent_tid=[1183], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1183
[pid 1181] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1181] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1183] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1183] umount2("./file0", MNT_DETACH) = 0
[pid 1183] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1181] <... futex resumed>) = 0
[pid 1183] <... futex resumed>) = 1
[pid 1183] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1181] exit_group(0) = ?
[pid 1182] <... futex resumed>) = ?
[pid 1183] <... futex resumed>) = ?
[pid 1182] +++ exited with 0 +++
[pid 1183] +++ exited with 0 +++
[pid 1181] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1181, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1184
./strace-static-x86_64: Process 1184 attached
[pid 1184] set_robust_list(0x5555560865e0, 24) = 0
[pid 1184] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1184] setpgid(0, 0) = 0
[pid 1184] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1184] write(3, "1000", 4) = 4
[pid 1184] close(3) = 0
[pid 1184] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1184] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1184] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1184] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1185 attached
, parent_tid=[1185], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1185
[pid 1184] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1184] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1185] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1185] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1185] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1184] <... futex resumed>) = 0
[pid 1184] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1184] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1185] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1185] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1184] <... futex resumed>) = 0
[pid 1185] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1184] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1184] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1185] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1185] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1185] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1184] <... futex resumed>) = 0
[pid 1185] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1184] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1184] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1184] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1184] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1184] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1185] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1184] <... clone resumed>, parent_tid=[1186], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1186
[pid 1185] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1184] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1184] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1186 attached
<unfinished ...>
[pid 1186] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1186] umount2("./file0", MNT_DETACH) = 0
[pid 1186] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1184] <... futex resumed>) = 0
[pid 1186] <... futex resumed>) = 1
[pid 1186] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1185] <... umount2 resumed>) = 0
[pid 1185] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1185] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1184] exit_group(0) = ?
[pid 1185] <... futex resumed>) = ?
[pid 1185] +++ exited with 0 +++
[pid 1186] <... futex resumed>) = ?
[pid 1186] +++ exited with 0 +++
[pid 1184] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1184, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1187
./strace-static-x86_64: Process 1187 attached
[pid 1187] set_robust_list(0x5555560865e0, 24) = 0
[pid 1187] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1187] setpgid(0, 0) = 0
[pid 1187] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1187] write(3, "1000", 4) = 4
[pid 1187] close(3) = 0
[pid 1187] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1187] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1187] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1187] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1188], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1188
./strace-static-x86_64: Process 1188 attached
[pid 1188] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1188] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1187] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1188] <... futex resumed>) = 0
[pid 1188] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1188] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1188] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1187] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1187] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1188] <... futex resumed>) = 0
[pid 1187] <... futex resumed>) = 1
[pid 1188] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1187] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1188] <... mount resumed>) = 0
[pid 1188] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1188] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1187] <... futex resumed>) = 0
[pid 1187] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1188] <... futex resumed>) = 0
[pid 1188] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1187] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1188] <... mount resumed>) = 0
[pid 1188] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1188] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1187] <... futex resumed>) = 0
[pid 1187] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1188] <... futex resumed>) = 0
[pid 1187] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1188] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1187] <... futex resumed>) = 0
[pid 1187] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1187] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1188] <... umount2 resumed>) = 0
[pid 1187] <... mprotect resumed>) = 0
[pid 1188] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1188] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1187] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1189 attached
, parent_tid=[1189], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1189
[pid 1189] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1187] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1189] <... set_robust_list resumed>) = 0
[pid 1187] <... futex resumed>) = 0
[pid 1189] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1187] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1189] <... umount2 resumed>) = 0
[pid 1189] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1187] <... futex resumed>) = 0
[pid 1187] exit_group(0 <unfinished ...>
[pid 1188] <... futex resumed>) = ?
[pid 1188] +++ exited with 0 +++
[pid 1187] <... exit_group resumed>) = ?
[pid 1189] +++ exited with 0 +++
[pid 1187] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1187, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1190
./strace-static-x86_64: Process 1190 attached
[pid 1190] set_robust_list(0x5555560865e0, 24) = 0
[pid 1190] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1190] setpgid(0, 0) = 0
[pid 1190] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1190] write(3, "1000", 4) = 4
[pid 1190] close(3) = 0
[pid 1190] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1190] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1190] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1190] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1191], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1191
./strace-static-x86_64: Process 1191 attached
[pid 1190] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1191] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1190] <... futex resumed>) = 0
[pid 1191] mkdir("./file0", 000 <unfinished ...>
[pid 1190] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1191] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1191] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1191] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1190] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1190] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1190] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1191] <... futex resumed>) = 0
[pid 1191] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1191] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1191] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1190] <... futex resumed>) = 0
[pid 1190] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1191] <... futex resumed>) = 0
[pid 1190] <... futex resumed>) = 1
[pid 1191] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1190] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1191] <... mount resumed>) = 0
[pid 1191] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1190] <... futex resumed>) = 0
[pid 1191] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1190] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1190] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1190] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1190] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1191] <... umount2 resumed>) = 0
[pid 1190] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1191] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1191] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1190] <... clone resumed>, parent_tid=[1192], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1192
./strace-static-x86_64: Process 1192 attached
[pid 1190] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1192] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1190] <... futex resumed>) = 0
[pid 1192] <... set_robust_list resumed>) = 0
[pid 1190] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1192] umount2("./file0", MNT_DETACH) = 0
[pid 1192] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1190] <... futex resumed>) = 0
[pid 1190] exit_group(0 <unfinished ...>
[pid 1191] <... futex resumed>) = ?
[pid 1190] <... exit_group resumed>) = ?
[pid 1192] +++ exited with 0 +++
[pid 1191] +++ exited with 0 +++
[pid 1190] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1190, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1193
./strace-static-x86_64: Process 1193 attached
[pid 1193] set_robust_list(0x5555560865e0, 24) = 0
[pid 1193] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1193] setpgid(0, 0) = 0
[pid 1193] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1193] write(3, "1000", 4) = 4
[pid 1193] close(3) = 0
[pid 1193] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1193] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1193] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1193] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1194 attached
, parent_tid=[1194], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1194
[pid 1194] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1194] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1193] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1194] <... futex resumed>) = 0
[pid 1193] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1194] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1194] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1194] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1193] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1193] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1194] <... futex resumed>) = 0
[pid 1194] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1193] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1194] <... mount resumed>) = 0
[pid 1194] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1193] <... futex resumed>) = 0
[pid 1194] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1193] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1193] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1194] <... mount resumed>) = 0
[pid 1194] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1193] <... futex resumed>) = 0
[pid 1194] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1193] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1193] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1193] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1193] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1194] <... umount2 resumed>) = 0
[pid 1193] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1194] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1194] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1193] <... clone resumed>, parent_tid=[1195], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1195
./strace-static-x86_64: Process 1195 attached
[pid 1193] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1195] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1193] <... futex resumed>) = 0
[pid 1195] <... set_robust_list resumed>) = 0
[pid 1193] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1195] umount2("./file0", MNT_DETACH) = 0
[pid 1195] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1193] <... futex resumed>) = 0
[pid 1195] <... futex resumed>) = 1
[pid 1195] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1193] exit_group(0) = ?
[pid 1194] <... futex resumed>) = ?
[pid 1194] +++ exited with 0 +++
[pid 1195] <... futex resumed>) = ?
[pid 1195] +++ exited with 0 +++
[pid 1193] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1193, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1196
./strace-static-x86_64: Process 1196 attached
[pid 1196] set_robust_list(0x5555560865e0, 24) = 0
[pid 1196] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1196] setpgid(0, 0) = 0
[pid 1196] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1196] write(3, "1000", 4) = 4
[pid 1196] close(3) = 0
[pid 1196] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1196] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1196] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1196] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1197], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1197
[pid 1196] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1196] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1197 attached
<unfinished ...>
[pid 1197] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1197] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1197] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1196] <... futex resumed>) = 0
[pid 1196] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1196] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1197] <... futex resumed>) = 1
[pid 1197] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1197] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1196] <... futex resumed>) = 0
[pid 1197] <... futex resumed>) = 1
[pid 1196] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1197] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1196] <... futex resumed>) = 0
[pid 1196] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1197] <... mount resumed>) = 0
[pid 1197] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1196] <... futex resumed>) = 0
[pid 1197] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1196] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1197] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1196] <... futex resumed>) = 0
[pid 1197] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1196] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1196] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1196] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1196] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1198], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1198
[pid 1196] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1198 attached
<unfinished ...>
[pid 1197] <... umount2 resumed>) = 0
[pid 1196] <... futex resumed>) = 0
[pid 1198] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1197] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1196] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1198] <... set_robust_list resumed>) = 0
[pid 1197] <... futex resumed>) = 0
[pid 1198] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1197] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1198] <... umount2 resumed>) = 0
[pid 1198] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1196] <... futex resumed>) = 0
[pid 1198] <... futex resumed>) = 1
[pid 1196] exit_group(0 <unfinished ...>
[pid 1198] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1196] <... exit_group resumed>) = ?
[pid 1197] <... futex resumed>) = ? <unavailable>
[pid 1198] <... futex resumed>) = ?
[pid 1197] +++ exited with 0 +++
[pid 1198] +++ exited with 0 +++
[pid 1196] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1196, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1199
./strace-static-x86_64: Process 1199 attached
[pid 1199] set_robust_list(0x5555560865e0, 24) = 0
[pid 1199] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1199] setpgid(0, 0) = 0
[pid 1199] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1199] write(3, "1000", 4) = 4
[pid 1199] close(3) = 0
[pid 1199] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1199] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1199] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1199] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1200 attached
<unfinished ...>
[pid 1200] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1199] <... clone resumed>, parent_tid=[1200], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1200
[pid 1200] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1199] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1200] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1199] <... futex resumed>) = 0
[pid 1200] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1200] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1200] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1199] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1199] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1200] <... futex resumed>) = 0
[pid 1199] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1200] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1200] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1200] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1199] <... futex resumed>) = 0
[pid 1199] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1200] <... futex resumed>) = 0
[pid 1200] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1199] <... futex resumed>) = 1
[pid 1199] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1200] <... mount resumed>) = 0
[pid 1200] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1199] <... futex resumed>) = 0
[pid 1200] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1199] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1199] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1199] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1199] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1200] <... umount2 resumed>) = 0
[pid 1199] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1200] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1200] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1201 attached
<unfinished ...>
[pid 1201] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1199] <... clone resumed>, parent_tid=[1201], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1201
[pid 1201] <... set_robust_list resumed>) = 0
[pid 1199] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1201] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1199] <... futex resumed>) = 0
[pid 1199] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1201] <... umount2 resumed>) = 0
[pid 1201] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1199] <... futex resumed>) = 0
[pid 1201] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1199] exit_group(0) = ?
[pid 1200] <... futex resumed>) = ?
[pid 1200] +++ exited with 0 +++
[pid 1201] <... futex resumed>) = ?
[pid 1201] +++ exited with 0 +++
[pid 1199] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1199, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1202
./strace-static-x86_64: Process 1202 attached
[pid 1202] set_robust_list(0x5555560865e0, 24) = 0
[pid 1202] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1202] setpgid(0, 0) = 0
[pid 1202] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1202] write(3, "1000", 4) = 4
[pid 1202] close(3) = 0
[pid 1202] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1202] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1202] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1202] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1203 attached
, parent_tid=[1203], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1203
[pid 1203] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1202] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1203] <... set_robust_list resumed>) = 0
[pid 1202] <... futex resumed>) = 0
[pid 1203] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1203] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1203] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1202] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1202] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1203] <... futex resumed>) = 0
[pid 1202] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1203] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1203] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1203] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1202] <... futex resumed>) = 0
[pid 1202] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1203] <... futex resumed>) = 0
[pid 1202] <... futex resumed>) = 1
[pid 1203] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1202] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1203] <... mount resumed>) = 0
[pid 1203] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1202] <... futex resumed>) = 0
[pid 1203] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1202] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1202] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1202] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1202] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1202] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1203] <... umount2 resumed>) = 0
[pid 1203] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1202] <... clone resumed>, parent_tid=[1204], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1204
[pid 1203] <... futex resumed>) = 0
[pid 1202] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1203] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1202] <... futex resumed>) = 0
[pid 1202] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1204 attached
<unfinished ...>
[pid 1204] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1204] umount2("./file0", MNT_DETACH) = 0
[pid 1204] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1202] <... futex resumed>) = 0
[pid 1202] exit_group(0) = ?
[pid 1203] <... futex resumed>) = ?
[pid 1203] +++ exited with 0 +++
[pid 1204] +++ exited with 0 +++
[pid 1202] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1202, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1205 attached
, child_tidptr=0x5555560865d0) = 1205
[pid 1205] set_robust_list(0x5555560865e0, 24) = 0
[pid 1205] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1205] setpgid(0, 0) = 0
[pid 1205] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1205] write(3, "1000", 4) = 4
[pid 1205] close(3) = 0
[pid 1205] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1205] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1205] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1205] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1206 attached
<unfinished ...>
[pid 1206] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1206] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1205] <... clone resumed>, parent_tid=[1206], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1206
[pid 1205] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1206] <... futex resumed>) = 0
[pid 1206] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1206] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1206] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1205] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1205] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1206] <... futex resumed>) = 0
[pid 1205] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1206] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1206] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1205] <... futex resumed>) = 0
[pid 1206] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1205] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1205] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1206] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1206] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1206] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1205] <... futex resumed>) = 0
[pid 1205] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1206] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1205] <... futex resumed>) = 0
[pid 1205] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1205] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1205] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1206] <... umount2 resumed>) = 0
[pid 1205] <... mprotect resumed>) = 0
[pid 1205] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1206] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1206] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1205] <... clone resumed>, parent_tid=[1207], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1207
[pid 1205] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1205] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1207 attached
<unfinished ...>
[pid 1207] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1207] umount2("./file0", MNT_DETACH) = 0
[pid 1207] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1205] <... futex resumed>) = 0
[pid 1205] exit_group(0) = ?
[pid 1207] +++ exited with 0 +++
[pid 1206] <... futex resumed>) = ?
[pid 1206] +++ exited with 0 +++
[pid 1205] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1205, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1208
./strace-static-x86_64: Process 1208 attached
[pid 1208] set_robust_list(0x5555560865e0, 24) = 0
[pid 1208] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1208] setpgid(0, 0) = 0
[pid 1208] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1208] write(3, "1000", 4) = 4
[pid 1208] close(3) = 0
[pid 1208] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1208] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1208] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1208] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1209 attached
, parent_tid=[1209], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1209
[pid 1209] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1208] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1209] <... set_robust_list resumed>) = 0
[pid 1208] <... futex resumed>) = 0
[pid 1208] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1209] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1209] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1208] <... futex resumed>) = 0
[pid 1209] <... futex resumed>) = 1
[pid 1208] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1209] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1208] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1209] <... mount resumed>) = 0
[pid 1209] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1208] <... futex resumed>) = 0
[pid 1209] <... futex resumed>) = 1
[pid 1208] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1209] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1208] <... futex resumed>) = 0
[pid 1208] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1209] <... mount resumed>) = 0
[pid 1209] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1208] <... futex resumed>) = 0
[pid 1208] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1209] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1208] <... futex resumed>) = 0
[pid 1208] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1208] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1208] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1208] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1209] <... umount2 resumed>) = 0
[pid 1209] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1210 attached
<unfinished ...>
[pid 1208] <... clone resumed>, parent_tid=[1210], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1210
[pid 1210] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1209] <... futex resumed>) = 0
[pid 1208] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1208] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1210] <... set_robust_list resumed>) = 0
[pid 1209] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1210] umount2("./file0", MNT_DETACH) = 0
[pid 1210] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1208] <... futex resumed>) = 0
[pid 1210] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1208] exit_group(0) = ?
[pid 1210] <... futex resumed>) = ?
[pid 1209] <... futex resumed>) = ?
[pid 1209] +++ exited with 0 +++
[pid 1210] +++ exited with 0 +++
[pid 1208] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1208, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1211 attached
, child_tidptr=0x5555560865d0) = 1211
[pid 1211] set_robust_list(0x5555560865e0, 24) = 0
[pid 1211] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1211] setpgid(0, 0) = 0
[pid 1211] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1211] write(3, "1000", 4) = 4
[pid 1211] close(3) = 0
[pid 1211] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1211] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1211] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1211] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1212], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1212
[pid 1211] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1211] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1212 attached
<unfinished ...>
[pid 1212] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1212] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1212] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1211] <... futex resumed>) = 0
[pid 1211] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1211] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1212] <... futex resumed>) = 1
[pid 1212] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1212] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1211] <... futex resumed>) = 0
[pid 1211] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1211] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1212] <... futex resumed>) = 1
[pid 1212] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1212] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1211] <... futex resumed>) = 0
[pid 1211] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1211] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1211] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1211] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1211] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1213 attached
, parent_tid=[1213], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1213
[pid 1211] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1211] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1212] <... futex resumed>) = 1
[pid 1212] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1213] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1213] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1212] <... umount2 resumed>) = 0
[pid 1212] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1212] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1213] <... umount2 resumed>) = 0
[pid 1213] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1211] <... futex resumed>) = 0
[pid 1213] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1211] exit_group(0) = ?
[pid 1212] <... futex resumed>) = ?
[pid 1213] <... futex resumed>) = ?
[pid 1212] +++ exited with 0 +++
[pid 1213] +++ exited with 0 +++
[pid 1211] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1211, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1214
./strace-static-x86_64: Process 1214 attached
[pid 1214] set_robust_list(0x5555560865e0, 24) = 0
[pid 1214] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1214] setpgid(0, 0) = 0
[pid 1214] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1214] write(3, "1000", 4) = 4
[pid 1214] close(3) = 0
[pid 1214] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1214] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1214] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1214] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1215 attached
, parent_tid=[1215], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1215
[pid 1214] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1214] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1215] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1215] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1215] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1214] <... futex resumed>) = 0
[pid 1214] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1215] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1214] <... futex resumed>) = 0
[pid 1214] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1215] <... mount resumed>) = 0
[pid 1215] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1214] <... futex resumed>) = 0
[pid 1215] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1214] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1215] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1214] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1215] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1215] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1214] <... futex resumed>) = 0
[pid 1215] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1214] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1214] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1214] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1214] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1215] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1214] <... mprotect resumed>) = 0
[pid 1214] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1216 attached
<unfinished ...>
[pid 1215] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1214] <... clone resumed>, parent_tid=[1216], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1216
[pid 1214] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1214] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1215] <... umount2 resumed>) = 0
[pid 1216] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1215] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1216] <... set_robust_list resumed>) = 0
[pid 1215] <... futex resumed>) = 0
[pid 1215] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1216] umount2("./file0", MNT_DETACH) = 0
[pid 1216] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1214] <... futex resumed>) = 0
[pid 1214] exit_group(0) = ?
[pid 1215] <... futex resumed>) = ?
[pid 1215] +++ exited with 0 +++
[pid 1216] +++ exited with 0 +++
[pid 1214] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1214, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1217
./strace-static-x86_64: Process 1217 attached
[pid 1217] set_robust_list(0x5555560865e0, 24) = 0
[pid 1217] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1217] setpgid(0, 0) = 0
[pid 1217] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1217] write(3, "1000", 4) = 4
[pid 1217] close(3) = 0
[pid 1217] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1217] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1217] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1217] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1218 attached
, parent_tid=[1218], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1218
[pid 1218] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1217] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1218] <... set_robust_list resumed>) = 0
[pid 1217] <... futex resumed>) = 0
[pid 1217] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1218] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1218] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1217] <... futex resumed>) = 0
[pid 1218] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1217] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1218] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1217] <... futex resumed>) = 0
[pid 1218] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1217] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1218] <... mount resumed>) = 0
[pid 1218] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1217] <... futex resumed>) = 0
[pid 1217] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1217] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1218] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1218] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1217] <... futex resumed>) = 0
[pid 1217] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1217] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1217] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1217] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1217] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1219 attached
, parent_tid=[1219], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1219
[pid 1219] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1217] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1219] <... set_robust_list resumed>) = 0
[pid 1217] <... futex resumed>) = 0
[pid 1219] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1217] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1219] <... umount2 resumed>) = 0
[pid 1219] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1217] <... futex resumed>) = 0
[pid 1219] <... futex resumed>) = 1
[pid 1219] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1218] umount2("./file0", MNT_DETACH) = 0
[pid 1218] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1218] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1217] exit_group(0) = ?
[pid 1218] <... futex resumed>) = ?
[pid 1218] +++ exited with 0 +++
[pid 1219] <... futex resumed>) = ?
[pid 1219] +++ exited with 0 +++
[pid 1217] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1217, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1220
./strace-static-x86_64: Process 1220 attached
[pid 1220] set_robust_list(0x5555560865e0, 24) = 0
[pid 1220] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1220] setpgid(0, 0) = 0
[pid 1220] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1220] write(3, "1000", 4) = 4
[pid 1220] close(3) = 0
[pid 1220] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1220] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1220] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1220] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1221 attached
, parent_tid=[1221], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1221
[pid 1221] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1220] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1220] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1221] <... set_robust_list resumed>) = 0
[pid 1221] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1221] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1220] <... futex resumed>) = 0
[pid 1220] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1220] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1221] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1221] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1220] <... futex resumed>) = 0
[pid 1221] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1220] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1220] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1221] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1221] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1221] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1220] <... futex resumed>) = 0
[pid 1221] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1220] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1220] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1220] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1220] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1221] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1220] <... mprotect resumed>) = 0
[pid 1220] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1221] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 1222 attached
<unfinished ...>
[pid 1220] <... clone resumed>, parent_tid=[1222], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1222
[pid 1220] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1220] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1222] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1221] <... umount2 resumed>) = 0
[pid 1222] <... set_robust_list resumed>) = 0
[pid 1221] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1222] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1221] <... futex resumed>) = 0
[pid 1221] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1222] <... umount2 resumed>) = 0
[pid 1222] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1220] <... futex resumed>) = 0
[pid 1220] exit_group(0) = ?
[pid 1221] <... futex resumed>) = ?
[pid 1221] +++ exited with 0 +++
[pid 1222] +++ exited with 0 +++
[pid 1220] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1220, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1223
./strace-static-x86_64: Process 1223 attached
[pid 1223] set_robust_list(0x5555560865e0, 24) = 0
[pid 1223] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1223] setpgid(0, 0) = 0
[pid 1223] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1223] write(3, "1000", 4) = 4
[pid 1223] close(3) = 0
[pid 1223] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1223] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1223] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1223] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1224 attached
, parent_tid=[1224], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1224
[pid 1224] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1223] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1224] <... set_robust_list resumed>) = 0
[pid 1224] mkdir("./file0", 000 <unfinished ...>
[pid 1223] <... futex resumed>) = 0
[pid 1224] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1224] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1224] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1223] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1223] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1224] <... futex resumed>) = 0
[pid 1224] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1224] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1224] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1223] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1223] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1224] <... futex resumed>) = 0
[pid 1224] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1223] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1224] <... mount resumed>) = 0
[pid 1224] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1224] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1223] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1223] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1224] <... futex resumed>) = 0
[pid 1224] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1223] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1224] <... umount2 resumed>) = 0
[pid 1224] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1224] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1223] <... futex resumed>) = 0
[pid 1223] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1223] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1223] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1225 attached
<unfinished ...>
[pid 1225] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1225] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1223] <... clone resumed>, parent_tid=[1225], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1225
[pid 1223] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1225] <... futex resumed>) = 0
[pid 1223] <... futex resumed>) = 1
[pid 1225] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1223] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1225] <... umount2 resumed>) = 0
[pid 1225] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1223] <... futex resumed>) = 0
[pid 1223] exit_group(0 <unfinished ...>
[pid 1225] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1223] <... exit_group resumed>) = ?
[pid 1225] <... futex resumed>) = ?
[pid 1224] <... futex resumed>) = ?
[pid 1225] +++ exited with 0 +++
[pid 1224] +++ exited with 0 +++
[pid 1223] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1223, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1226
./strace-static-x86_64: Process 1226 attached
[pid 1226] set_robust_list(0x5555560865e0, 24) = 0
[pid 1226] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1226] setpgid(0, 0) = 0
[pid 1226] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1226] write(3, "1000", 4) = 4
[pid 1226] close(3) = 0
[pid 1226] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1226] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1226] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1226] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1227 attached
<unfinished ...>
[pid 1227] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1226] <... clone resumed>, parent_tid=[1227], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1227
[pid 1227] <... set_robust_list resumed>) = 0
[pid 1227] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1226] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1227] <... futex resumed>) = 0
[pid 1226] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1227] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1227] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1227] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1226] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1226] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1227] <... futex resumed>) = 0
[pid 1227] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1226] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1227] <... mount resumed>) = 0
[pid 1227] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1227] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1226] <... futex resumed>) = 0
[pid 1226] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1227] <... futex resumed>) = 0
[pid 1226] <... futex resumed>) = 1
[pid 1227] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1226] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1227] <... mount resumed>) = 0
[pid 1227] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1227] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1226] <... futex resumed>) = 0
[pid 1226] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1226] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1226] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1227] <... futex resumed>) = 0
[pid 1226] <... mmap resumed>) = 0x7f236e446000
[pid 1227] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1226] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1227] <... umount2 resumed>) = 0
[pid 1226] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1227] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1227] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1228 attached
<unfinished ...>
[pid 1228] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1226] <... clone resumed>, parent_tid=[1228], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1228
[pid 1228] <... set_robust_list resumed>) = 0
[pid 1226] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1226] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1228] umount2("./file0", MNT_DETACH) = 0
[pid 1228] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1228] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1226] <... futex resumed>) = 0
[pid 1226] exit_group(0) = ?
[pid 1227] <... futex resumed>) = ?
[pid 1227] +++ exited with 0 +++
[pid 1228] <... futex resumed>) = ?
[pid 1228] +++ exited with 0 +++
[pid 1226] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1226, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1229
./strace-static-x86_64: Process 1229 attached
[pid 1229] set_robust_list(0x5555560865e0, 24) = 0
[pid 1229] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1229] setpgid(0, 0) = 0
[pid 1229] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1229] write(3, "1000", 4) = 4
[pid 1229] close(3) = 0
[pid 1229] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1229] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1229] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1229] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1230 attached
<unfinished ...>
[pid 1230] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1230] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1229] <... clone resumed>, parent_tid=[1230], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1230
[pid 1229] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1230] <... futex resumed>) = 0
[pid 1230] mkdir("./file0", 000 <unfinished ...>
[pid 1229] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1230] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1230] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1229] <... futex resumed>) = 0
[pid 1229] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1229] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1230] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1230] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1229] <... futex resumed>) = 0
[pid 1229] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1229] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1230] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1230] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1229] <... futex resumed>) = 0
[pid 1229] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1229] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1229] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1229] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1229] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1231], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1231
[pid 1229] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1229] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1230] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 1231 attached
) = 0
[pid 1230] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1230] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1231] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1231] umount2("./file0", MNT_DETACH) = 0
[pid 1231] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1229] <... futex resumed>) = 0
[pid 1229] exit_group(0) = ?
[pid 1230] <... futex resumed>) = ?
[pid 1230] +++ exited with 0 +++
[pid 1231] <... futex resumed>) = ?
[pid 1231] +++ exited with 0 +++
[pid 1229] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1229, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1232
./strace-static-x86_64: Process 1232 attached
[pid 1232] set_robust_list(0x5555560865e0, 24) = 0
[pid 1232] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1232] setpgid(0, 0) = 0
[pid 1232] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1232] write(3, "1000", 4) = 4
[pid 1232] close(3) = 0
[pid 1232] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1232] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1232] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1232] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1233 attached
, parent_tid=[1233], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1233
[pid 1233] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1233] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1232] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1233] <... futex resumed>) = 0
[pid 1232] <... futex resumed>) = 1
[pid 1233] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1232] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1233] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1233] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1232] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1232] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1233] <... futex resumed>) = 0
[pid 1233] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1232] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1233] <... mount resumed>) = 0
[pid 1233] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1232] <... futex resumed>) = 0
[pid 1233] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1232] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1233] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1233] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1232] <... futex resumed>) = 0
[pid 1232] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1233] <... mount resumed>) = 0
[pid 1233] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1233] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1232] <... futex resumed>) = 0
[pid 1232] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1233] <... futex resumed>) = 0
[pid 1232] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1233] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1232] <... futex resumed>) = 0
[pid 1232] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1233] <... umount2 resumed>) = 0
[pid 1233] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1233] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1232] <... mmap resumed>) = 0x7f236e446000
[pid 1232] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1232] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1234 attached
, parent_tid=[1234], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1234
[pid 1234] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1232] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1234] <... set_robust_list resumed>) = 0
[pid 1232] <... futex resumed>) = 0
[pid 1234] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1232] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1234] <... umount2 resumed>) = 0
[pid 1234] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1232] <... futex resumed>) = 0
[pid 1232] exit_group(0) = ?
[pid 1233] <... futex resumed>) = ?
[pid 1233] +++ exited with 0 +++
[pid 1234] +++ exited with 0 +++
[pid 1232] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1232, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1235 attached
, child_tidptr=0x5555560865d0) = 1235
[pid 1235] set_robust_list(0x5555560865e0, 24) = 0
[pid 1235] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1235] setpgid(0, 0) = 0
[pid 1235] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1235] write(3, "1000", 4) = 4
[pid 1235] close(3) = 0
[pid 1235] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1235] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1235] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1235] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1236 attached
, parent_tid=[1236], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1236
[pid 1236] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1236] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1235] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1236] <... futex resumed>) = 0
[pid 1235] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1236] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1236] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1236] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1235] <... futex resumed>) = 0
[pid 1235] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1236] <... futex resumed>) = 0
[pid 1236] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1235] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1236] <... mount resumed>) = 0
[pid 1236] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1236] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1235] <... futex resumed>) = 0
[pid 1235] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1236] <... futex resumed>) = 0
[pid 1236] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1235] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1236] <... mount resumed>) = 0
[pid 1236] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1235] <... futex resumed>) = 0
[pid 1236] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1235] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1236] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1235] <... futex resumed>) = 0
[pid 1236] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1235] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1235] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1235] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1235] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1236] <... umount2 resumed>) = 0
[pid 1236] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1236] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1235] <... clone resumed>, parent_tid=[1237], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1237
[pid 1235] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1235] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1237 attached
<unfinished ...>
[pid 1237] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1237] umount2("./file0", MNT_DETACH) = 0
[pid 1237] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1235] <... futex resumed>) = 0
[pid 1235] exit_group(0) = ?
[pid 1236] <... futex resumed>) = ?
[pid 1236] +++ exited with 0 +++
[pid 1237] +++ exited with 0 +++
[pid 1235] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1235, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1238 attached
, child_tidptr=0x5555560865d0) = 1238
[pid 1238] set_robust_list(0x5555560865e0, 24) = 0
[pid 1238] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1238] setpgid(0, 0) = 0
[pid 1238] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1238] write(3, "1000", 4) = 4
[pid 1238] close(3) = 0
[pid 1238] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1238] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1238] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1238] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1239 attached
<unfinished ...>
[pid 1239] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1238] <... clone resumed>, parent_tid=[1239], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1239
[pid 1239] <... set_robust_list resumed>) = 0
[pid 1238] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1239] mkdir("./file0", 000 <unfinished ...>
[pid 1238] <... futex resumed>) = 0
[pid 1238] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1239] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1239] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1238] <... futex resumed>) = 0
[pid 1239] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1238] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1238] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1239] <... mount resumed>) = 0
[pid 1239] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1238] <... futex resumed>) = 0
[pid 1239] <... futex resumed>) = 1
[pid 1239] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1238] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1238] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1239] <... mount resumed>) = 0
[pid 1239] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1238] <... futex resumed>) = 0
[pid 1238] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1238] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1238] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1238] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1238] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1239] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1238] <... clone resumed>, parent_tid=[1240], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1240
[pid 1238] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1238] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1240 attached
<unfinished ...>
[pid 1240] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1240] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1239] <... umount2 resumed>) = 0
[pid 1240] <... umount2 resumed>) = 0
[pid 1240] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1238] <... futex resumed>) = 0
[pid 1240] <... futex resumed>) = 1
[pid 1239] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1240] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1239] <... futex resumed>) = 0
[pid 1239] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1238] exit_group(0) = ?
[pid 1240] <... futex resumed>) = ?
[pid 1239] <... futex resumed>) = ?
[pid 1240] +++ exited with 0 +++
[pid 1239] +++ exited with 0 +++
[pid 1238] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1238, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1241 attached
, child_tidptr=0x5555560865d0) = 1241
[pid 1241] set_robust_list(0x5555560865e0, 24) = 0
[pid 1241] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1241] setpgid(0, 0) = 0
[pid 1241] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1241] write(3, "1000", 4) = 4
[pid 1241] close(3) = 0
[pid 1241] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1241] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1241] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1241] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1242 attached
, parent_tid=[1242], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1242
[pid 1242] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1242] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1241] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1242] <... futex resumed>) = 0
[pid 1242] mkdir("./file0", 000 <unfinished ...>
[pid 1241] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1242] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1242] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1241] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1242] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1241] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1242] <... futex resumed>) = 0
[pid 1241] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1242] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1242] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1241] <... futex resumed>) = 0
[pid 1241] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1242] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1241] <... futex resumed>) = 0
[pid 1241] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1242] <... mount resumed>) = 0
[pid 1242] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1241] <... futex resumed>) = 0
[pid 1242] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1241] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1241] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1241] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1242] <... umount2 resumed>) = 0
[pid 1241] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1242] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1241] <... mprotect resumed>) = 0
[pid 1242] <... futex resumed>) = 0
[pid 1241] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1242] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1243 attached
<unfinished ...>
[pid 1243] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1243] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1241] <... clone resumed>, parent_tid=[1243], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1243
[pid 1241] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1243] <... futex resumed>) = 0
[pid 1243] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1241] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1243] <... umount2 resumed>) = 0
[pid 1243] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1243] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1241] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1241] exit_group(0) = ?
[pid 1242] <... futex resumed>) = ?
[pid 1243] <... futex resumed>) = ?
[pid 1243] +++ exited with 0 +++
[pid 1242] +++ exited with 0 +++
[pid 1241] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1241, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1244
./strace-static-x86_64: Process 1244 attached
[pid 1244] set_robust_list(0x5555560865e0, 24) = 0
[pid 1244] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1244] setpgid(0, 0) = 0
[pid 1244] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1244] write(3, "1000", 4) = 4
[pid 1244] close(3) = 0
[pid 1244] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1244] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1244] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1244] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1245 attached
, parent_tid=[1245], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1245
[pid 1244] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1244] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1245] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1245] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1245] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1245] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1244] <... futex resumed>) = 0
[pid 1244] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1244] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1245] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1245] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1245] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1244] <... futex resumed>) = 0
[pid 1245] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1244] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1244] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1245] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1245] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1245] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1244] <... futex resumed>) = 0
[pid 1244] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1244] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1244] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1244] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1245] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1244] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1246], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1246
[pid 1244] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1244] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1246 attached
<unfinished ...>
[pid 1246] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1246] umount2("./file0", MNT_DETACH) = 0
[pid 1246] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1244] <... futex resumed>) = 0
[pid 1246] <... futex resumed>) = 1
[pid 1246] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1245] <... umount2 resumed>) = 0
[pid 1245] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1245] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1244] exit_group(0) = ?
[pid 1246] <... futex resumed>) = ?
[pid 1245] <... futex resumed>) = ?
[pid 1246] +++ exited with 0 +++
[pid 1245] +++ exited with 0 +++
[pid 1244] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1244, si_uid=0, si_status=0, si_utime=0, si_stime=1} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1247
./strace-static-x86_64: Process 1247 attached
[pid 1247] set_robust_list(0x5555560865e0, 24) = 0
[pid 1247] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1247] setpgid(0, 0) = 0
[pid 1247] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1247] write(3, "1000", 4) = 4
[pid 1247] close(3) = 0
[pid 1247] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1247] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1247] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1247] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1248], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1248
./strace-static-x86_64: Process 1248 attached
[pid 1248] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1247] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1248] <... set_robust_list resumed>) = 0
[pid 1247] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1248] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1248] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1247] <... futex resumed>) = 0
[pid 1247] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1247] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1248] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1248] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1247] <... futex resumed>) = 0
[pid 1247] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1247] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1248] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1248] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1247] <... futex resumed>) = 0
[pid 1248] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1247] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1248] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1247] <... futex resumed>) = 0
[pid 1247] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1248] <... umount2 resumed>) = 0
[pid 1247] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1248] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1247] <... mmap resumed>) = 0x7f236e446000
[pid 1248] <... futex resumed>) = 0
[pid 1247] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1248] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1247] <... mprotect resumed>) = 0
[pid 1247] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1249 attached
, parent_tid=[1249], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1249
[pid 1249] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1247] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1249] <... set_robust_list resumed>) = 0
[pid 1247] <... futex resumed>) = 0
[pid 1249] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1247] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1249] <... umount2 resumed>) = 0
[pid 1249] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1247] <... futex resumed>) = 0
[pid 1247] exit_group(0 <unfinished ...>
[pid 1248] <... futex resumed>) = ?
[pid 1247] <... exit_group resumed>) = ?
[pid 1248] +++ exited with 0 +++
[pid 1249] +++ exited with 0 +++
[pid 1247] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1247, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1250 attached
, child_tidptr=0x5555560865d0) = 1250
[pid 1250] set_robust_list(0x5555560865e0, 24) = 0
[pid 1250] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1250] setpgid(0, 0) = 0
[pid 1250] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1250] write(3, "1000", 4) = 4
[pid 1250] close(3) = 0
[pid 1250] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1250] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1250] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1250] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1251 attached
, parent_tid=[1251], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1251
[pid 1251] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1250] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1251] <... set_robust_list resumed>) = 0
[pid 1250] <... futex resumed>) = 0
[pid 1250] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1251] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1251] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1250] <... futex resumed>) = 0
[pid 1251] <... futex resumed>) = 1
[pid 1251] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1250] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1250] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1251] <... mount resumed>) = 0
[pid 1251] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1250] <... futex resumed>) = 0
[pid 1251] <... futex resumed>) = 1
[pid 1250] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1251] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1250] <... futex resumed>) = 0
[pid 1250] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1251] <... mount resumed>) = 0
[pid 1251] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1250] <... futex resumed>) = 0
[pid 1250] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1250] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1250] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1250] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1250] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1252], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1252
[pid 1250] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1250] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1252 attached
<unfinished ...>
[pid 1252] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1252] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1251] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1252] <... umount2 resumed>) = 0
[pid 1252] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1250] <... futex resumed>) = 0
[pid 1252] <... futex resumed>) = 1
[pid 1252] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1251] <... umount2 resumed>) = 0
[pid 1251] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1251] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1250] exit_group(0 <unfinished ...>
[pid 1252] <... futex resumed>) = -1 (errno 18446744073709551555)
[pid 1250] <... exit_group resumed>) = ?
[pid 1251] <... futex resumed>) = ?
[pid 1251] +++ exited with 0 +++
[pid 1252] +++ exited with 0 +++
[pid 1250] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1250, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1253
./strace-static-x86_64: Process 1253 attached
[pid 1253] set_robust_list(0x5555560865e0, 24) = 0
[pid 1253] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1253] setpgid(0, 0) = 0
[pid 1253] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1253] write(3, "1000", 4) = 4
[pid 1253] close(3) = 0
[pid 1253] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1253] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1253] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1253] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1254 attached
<unfinished ...>
[pid 1254] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1253] <... clone resumed>, parent_tid=[1254], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1254
[pid 1253] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1254] <... set_robust_list resumed>) = 0
[pid 1253] <... futex resumed>) = 0
[pid 1254] mkdir("./file0", 000 <unfinished ...>
[pid 1253] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1254] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1254] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1253] <... futex resumed>) = 0
[pid 1253] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1254] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1253] <... futex resumed>) = 0
[pid 1254] <... mount resumed>) = 0
[pid 1254] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1254] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1253] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1253] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1254] <... futex resumed>) = 0
[pid 1254] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1253] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1254] <... mount resumed>) = 0
[pid 1254] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1254] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1253] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1253] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1254] <... futex resumed>) = 0
[pid 1254] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1253] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1254] <... umount2 resumed>) = 0
[pid 1253] <... futex resumed>) = 0
[pid 1254] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1254] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1253] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1253] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1253] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1255 attached
, parent_tid=[1255], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1255
[pid 1255] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1255] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1253] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1255] <... futex resumed>) = 0
[pid 1255] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1253] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1255] <... umount2 resumed>) = 0
[pid 1255] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1253] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1255] <... futex resumed>) = 0
[pid 1255] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1253] exit_group(0 <unfinished ...>
[pid 1254] <... futex resumed>) = ?
[pid 1253] <... exit_group resumed>) = ?
[pid 1254] +++ exited with 0 +++
[pid 1255] <... futex resumed>) = ?
[pid 1255] +++ exited with 0 +++
[pid 1253] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1253, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1256
./strace-static-x86_64: Process 1256 attached
[pid 1256] set_robust_list(0x5555560865e0, 24) = 0
[pid 1256] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1256] setpgid(0, 0) = 0
[pid 1256] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1256] write(3, "1000", 4) = 4
[pid 1256] close(3) = 0
[pid 1256] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1256] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1256] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1256] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1257 attached
, parent_tid=[1257], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1257
[pid 1257] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1256] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1257] <... set_robust_list resumed>) = 0
[pid 1256] <... futex resumed>) = 0
[pid 1257] mkdir("./file0", 000 <unfinished ...>
[pid 1256] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1257] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1257] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1256] <... futex resumed>) = 0
[pid 1257] <... futex resumed>) = 1
[pid 1256] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1257] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1256] <... futex resumed>) = 0
[pid 1256] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1257] <... mount resumed>) = 0
[pid 1257] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1256] <... futex resumed>) = 0
[pid 1257] <... futex resumed>) = 1
[pid 1256] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1256] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1257] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1257] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1256] <... futex resumed>) = 0
[pid 1257] <... futex resumed>) = 1
[pid 1256] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1257] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1256] <... futex resumed>) = 0
[pid 1256] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1256] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1256] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1256] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1257] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 1258 attached
[pid 1257] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1258] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1257] <... futex resumed>) = 0
[pid 1256] <... clone resumed>, parent_tid=[1258], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1258
[pid 1258] <... set_robust_list resumed>) = 0
[pid 1257] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1256] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1258] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1256] <... futex resumed>) = 0
[pid 1256] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1258] <... umount2 resumed>) = 0
[pid 1258] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1256] <... futex resumed>) = 0
[pid 1256] exit_group(0 <unfinished ...>
[pid 1257] <... futex resumed>) = ?
[pid 1256] <... exit_group resumed>) = ?
[pid 1257] +++ exited with 0 +++
[pid 1258] <... futex resumed>) = ?
[pid 1258] +++ exited with 0 +++
[pid 1256] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1256, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1259 attached
, child_tidptr=0x5555560865d0) = 1259
[pid 1259] set_robust_list(0x5555560865e0, 24) = 0
[pid 1259] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1259] setpgid(0, 0) = 0
[pid 1259] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1259] write(3, "1000", 4) = 4
[pid 1259] close(3) = 0
[pid 1259] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1259] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1259] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1259] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1260 attached
<unfinished ...>
[pid 1260] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1260] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1259] <... clone resumed>, parent_tid=[1260], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1260
[pid 1259] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1259] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1260] <... futex resumed>) = 0
[pid 1260] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1260] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1260] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1259] <... futex resumed>) = 0
[pid 1259] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1260] <... futex resumed>) = 0
[pid 1260] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1259] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1260] <... mount resumed>) = 0
[pid 1260] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1260] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1259] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1259] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1260] <... futex resumed>) = 0
[pid 1260] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1259] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1260] <... mount resumed>) = 0
[pid 1260] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1260] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1259] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1259] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1260] <... futex resumed>) = 0
[pid 1259] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1260] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1259] <... futex resumed>) = 0
[pid 1259] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1260] <... umount2 resumed>) = 0
[pid 1260] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1260] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1259] <... mmap resumed>) = 0x7f236e446000
[pid 1259] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1259] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1261 attached
, parent_tid=[1261], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1261
[pid 1261] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1261] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1259] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1261] <... futex resumed>) = 0
[pid 1261] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1259] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1261] <... umount2 resumed>) = 0
[pid 1261] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1261] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1259] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1259] exit_group(0 <unfinished ...>
[pid 1260] <... futex resumed>) = ?
[pid 1259] <... exit_group resumed>) = ?
[pid 1260] +++ exited with 0 +++
[pid 1261] <... futex resumed>) = ?
[pid 1261] +++ exited with 0 +++
[pid 1259] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1259, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1262 attached
, child_tidptr=0x5555560865d0) = 1262
[pid 1262] set_robust_list(0x5555560865e0, 24) = 0
[pid 1262] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1262] setpgid(0, 0) = 0
[pid 1262] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1262] write(3, "1000", 4) = 4
[pid 1262] close(3) = 0
[pid 1262] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1262] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1262] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1262] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1263 attached
<unfinished ...>
[pid 1263] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1263] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1262] <... clone resumed>, parent_tid=[1263], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1263
[pid 1262] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1263] <... futex resumed>) = 0
[pid 1263] mkdir("./file0", 000 <unfinished ...>
[pid 1262] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1263] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1263] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1263] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1262] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1262] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1263] <... futex resumed>) = 0
[pid 1263] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1262] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1263] <... mount resumed>) = 0
[pid 1263] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1263] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1262] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1262] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1263] <... futex resumed>) = 0
[pid 1263] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1262] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1263] <... mount resumed>) = 0
[pid 1263] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1262] <... futex resumed>) = 0
[pid 1262] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1262] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1263] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1262] <... futex resumed>) = 0
[pid 1262] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1262] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1262] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1263] <... umount2 resumed>) = 0
[pid 1263] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1263] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1262] <... clone resumed>, parent_tid=[1264], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1264
[pid 1262] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1262] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1264 attached
<unfinished ...>
[pid 1264] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1264] umount2("./file0", MNT_DETACH) = 0
[pid 1264] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1262] <... futex resumed>) = 0
[pid 1262] exit_group(0) = ?
[pid 1263] <... futex resumed>) = ?
[pid 1264] <... futex resumed>) = ?
[pid 1263] +++ exited with 0 +++
[pid 1264] +++ exited with 0 +++
[pid 1262] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1262, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1265
./strace-static-x86_64: Process 1265 attached
[pid 1265] set_robust_list(0x5555560865e0, 24) = 0
[pid 1265] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1265] setpgid(0, 0) = 0
[pid 1265] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1265] write(3, "1000", 4) = 4
[pid 1265] close(3) = 0
[pid 1265] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1265] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1265] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1265] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1266], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1266
[pid 1265] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1265] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1266 attached
<unfinished ...>
[pid 1266] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1266] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1266] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1265] <... futex resumed>) = 0
[pid 1265] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1265] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1266] <... futex resumed>) = 1
[pid 1266] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1266] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1265] <... futex resumed>) = 0
[pid 1265] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1265] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1266] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1266] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1265] <... futex resumed>) = 0
[pid 1265] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1265] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1265] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1265] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1265] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1266] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1265] <... clone resumed>, parent_tid=[1267], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1267
[pid 1265] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1266] <... umount2 resumed>) = 0
[pid 1265] <... futex resumed>) = 0
[pid 1265] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1267 attached
<unfinished ...>
[pid 1267] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1267] umount2("./file0", MNT_DETACH) = 0
[pid 1266] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1267] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1265] <... futex resumed>) = 0
[pid 1265] exit_group(0 <unfinished ...>
[pid 1266] <... futex resumed>) = 0
[pid 1265] <... exit_group resumed>) = ?
[pid 1267] <... futex resumed>) = ?
[pid 1267] +++ exited with 0 +++
[pid 1266] +++ exited with 0 +++
[pid 1265] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1265, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1268
./strace-static-x86_64: Process 1268 attached
[pid 1268] set_robust_list(0x5555560865e0, 24) = 0
[pid 1268] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1268] setpgid(0, 0) = 0
[pid 1268] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1268] write(3, "1000", 4) = 4
[pid 1268] close(3) = 0
[pid 1268] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1268] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1268] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1268] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1269 attached
<unfinished ...>
[pid 1269] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1269] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1268] <... clone resumed>, parent_tid=[1269], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1269
[pid 1268] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1269] <... futex resumed>) = 0
[pid 1268] <... futex resumed>) = 1
[pid 1269] mkdir("./file0", 000 <unfinished ...>
[pid 1268] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1269] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1269] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1269] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1268] <... futex resumed>) = 0
[pid 1268] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1269] <... futex resumed>) = 0
[pid 1269] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1268] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1269] <... mount resumed>) = 0
[pid 1269] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1268] <... futex resumed>) = 0
[pid 1268] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1269] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1268] <... futex resumed>) = 0
[pid 1268] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1269] <... mount resumed>) = 0
[pid 1269] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1268] <... futex resumed>) = 0
[pid 1268] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1269] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1268] <... futex resumed>) = 0
[pid 1268] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1268] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1268] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1268] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1269] <... umount2 resumed>) = 0
[pid 1269] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1270 attached
<unfinished ...>
[pid 1270] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1270] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1269] <... futex resumed>) = 0
[pid 1268] <... clone resumed>, parent_tid=[1270], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1270
[pid 1269] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1268] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1270] <... futex resumed>) = 0
[pid 1270] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1268] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1270] <... umount2 resumed>) = 0
[pid 1270] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1268] <... futex resumed>) = 0
[pid 1270] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1268] exit_group(0) = ?
[pid 1269] <... futex resumed>) = ?
[pid 1269] +++ exited with 0 +++
[pid 1270] <... futex resumed>) = ?
[pid 1270] +++ exited with 0 +++
[pid 1268] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1268, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1271
./strace-static-x86_64: Process 1271 attached
[pid 1271] set_robust_list(0x5555560865e0, 24) = 0
[pid 1271] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1271] setpgid(0, 0) = 0
[pid 1271] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1271] write(3, "1000", 4) = 4
[pid 1271] close(3) = 0
[pid 1271] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1271] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1271] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1271] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1272 attached
, parent_tid=[1272], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1272
[pid 1271] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1272] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1271] <... futex resumed>) = 0
[pid 1271] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1272] <... set_robust_list resumed>) = 0
[pid 1272] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1272] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1271] <... futex resumed>) = 0
[pid 1271] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1272] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1271] <... futex resumed>) = 0
[pid 1271] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1272] <... mount resumed>) = 0
[pid 1272] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1271] <... futex resumed>) = 0
[pid 1271] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1272] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1271] <... futex resumed>) = 0
[pid 1271] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1272] <... mount resumed>) = 0
[pid 1272] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1271] <... futex resumed>) = 0
[pid 1271] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1271] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1271] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1271] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1271] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1272] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1271] <... clone resumed>, parent_tid=[1273], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1273
[pid 1271] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1271] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1273 attached
<unfinished ...>
[pid 1273] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1273] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1272] <... umount2 resumed>) = 0
[pid 1273] <... umount2 resumed>) = 0
[pid 1273] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1271] <... futex resumed>) = 0
[pid 1273] <... futex resumed>) = 1
[pid 1273] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1272] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1272] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1271] exit_group(0) = ?
[pid 1273] <... futex resumed>) = ?
[pid 1273] +++ exited with 0 +++
[pid 1272] <... futex resumed>) = ?
[pid 1272] +++ exited with 0 +++
[pid 1271] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1271, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1274 attached
, child_tidptr=0x5555560865d0) = 1274
[pid 1274] set_robust_list(0x5555560865e0, 24) = 0
[pid 1274] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1274] setpgid(0, 0) = 0
[pid 1274] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1274] write(3, "1000", 4) = 4
[pid 1274] close(3) = 0
[pid 1274] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1274] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1274] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1274] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1275 attached
, parent_tid=[1275], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1275
[pid 1275] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1274] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1275] <... set_robust_list resumed>) = 0
[pid 1274] <... futex resumed>) = 0
[pid 1274] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1275] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1275] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1274] <... futex resumed>) = 0
[pid 1275] <... futex resumed>) = 1
[pid 1274] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1275] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1274] <... futex resumed>) = 0
[pid 1274] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1275] <... mount resumed>) = 0
[pid 1275] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1274] <... futex resumed>) = 0
[pid 1275] <... futex resumed>) = 1
[pid 1274] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1275] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1274] <... futex resumed>) = 0
[pid 1274] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1275] <... mount resumed>) = 0
[pid 1275] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1274] <... futex resumed>) = 0
[pid 1275] <... futex resumed>) = 1
[pid 1274] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1275] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1274] <... futex resumed>) = 0
[pid 1274] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1274] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1274] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1274] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1275] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 1276 attached
[pid 1275] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1274] <... clone resumed>, parent_tid=[1276], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1276
[pid 1276] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1275] <... futex resumed>) = 0
[pid 1274] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1276] <... set_robust_list resumed>) = 0
[pid 1275] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1274] <... futex resumed>) = 0
[pid 1276] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1274] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1276] <... umount2 resumed>) = 0
[pid 1276] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1274] <... futex resumed>) = 0
[pid 1276] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1274] exit_group(0) = ?
[pid 1275] <... futex resumed>) = 231
[pid 1276] <... futex resumed>) = ?
[pid 1275] +++ exited with 0 +++
[pid 1276] +++ exited with 0 +++
[pid 1274] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1274, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1277
./strace-static-x86_64: Process 1277 attached
[pid 1277] set_robust_list(0x5555560865e0, 24) = 0
[pid 1277] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1277] setpgid(0, 0) = 0
[pid 1277] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1277] write(3, "1000", 4) = 4
[pid 1277] close(3) = 0
[pid 1277] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1277] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1277] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1277] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1278 attached
<unfinished ...>
[pid 1278] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1277] <... clone resumed>, parent_tid=[1278], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1278
[pid 1278] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1277] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1278] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1278] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1278] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1278] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1277] <... futex resumed>) = 1
[pid 1278] <... futex resumed>) = 0
[pid 1278] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1277] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1277] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1278] <... futex resumed>) = 0
[pid 1278] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1277] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1278] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1278] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1277] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1277] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1278] <... futex resumed>) = 0
[pid 1278] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1277] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1278] <... mount resumed>) = 0
[pid 1278] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1278] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1277] <... futex resumed>) = 0
[pid 1277] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1278] <... futex resumed>) = 0
[pid 1278] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1277] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1277] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1277] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1277] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1278] <... umount2 resumed>) = 0
[pid 1278] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1278] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1279 attached
<unfinished ...>
[pid 1279] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1279] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1277] <... clone resumed>, parent_tid=[1279], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1279
[pid 1277] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1277] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1279] <... futex resumed>) = 0
[pid 1279] umount2("./file0", MNT_DETACH) = 0
[pid 1279] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1277] <... futex resumed>) = 0
[pid 1277] exit_group(0 <unfinished ...>
[pid 1279] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1278] <... futex resumed>) = ?
[pid 1277] <... exit_group resumed>) = ?
[pid 1279] <... futex resumed>) = -1 (errno 18446744073709551414)
[pid 1278] +++ exited with 0 +++
[pid 1279] +++ exited with 0 +++
[pid 1277] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1277, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1280
./strace-static-x86_64: Process 1280 attached
[pid 1280] set_robust_list(0x5555560865e0, 24) = 0
[pid 1280] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1280] setpgid(0, 0) = 0
[pid 1280] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1280] write(3, "1000", 4) = 4
[pid 1280] close(3) = 0
[pid 1280] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1280] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1280] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1280] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1281 attached
, parent_tid=[1281], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1281
[pid 1281] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1281] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1280] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1281] <... futex resumed>) = 0
[pid 1281] mkdir("./file0", 000 <unfinished ...>
[pid 1280] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1281] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1281] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1281] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1280] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1280] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1281] <... futex resumed>) = 0
[pid 1281] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1280] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1281] <... mount resumed>) = 0
[pid 1281] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1281] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1280] <... futex resumed>) = 0
[pid 1280] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1281] <... futex resumed>) = 0
[pid 1280] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1281] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1281] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1280] <... futex resumed>) = 0
[pid 1281] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1280] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1281] <... futex resumed>) = 0
[pid 1281] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1280] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1281] <... umount2 resumed>) = 0
[pid 1280] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1281] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1280] <... mmap resumed>) = 0x7f236e446000
[pid 1281] <... futex resumed>) = 0
[pid 1281] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1280] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1280] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1282 attached
<unfinished ...>
[pid 1282] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1280] <... clone resumed>, parent_tid=[1282], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1282
[pid 1282] <... set_robust_list resumed>) = 0
[pid 1280] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1282] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1280] <... futex resumed>) = 0
[pid 1280] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1282] <... umount2 resumed>) = 0
[pid 1282] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1280] <... futex resumed>) = 0
[pid 1280] exit_group(0) = ?
[pid 1282] +++ exited with 0 +++
[pid 1281] <... futex resumed>) = ?
[pid 1281] +++ exited with 0 +++
[pid 1280] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1280, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1283
./strace-static-x86_64: Process 1283 attached
[pid 1283] set_robust_list(0x5555560865e0, 24) = 0
[pid 1283] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1283] setpgid(0, 0) = 0
[pid 1283] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1283] write(3, "1000", 4) = 4
[pid 1283] close(3) = 0
[pid 1283] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1283] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1283] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1283] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1284 attached
, parent_tid=[1284], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1284
[pid 1284] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1284] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1283] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1284] <... futex resumed>) = 0
[pid 1284] mkdir("./file0", 000 <unfinished ...>
[pid 1283] <... futex resumed>) = 1
[pid 1284] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1284] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1284] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1283] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1283] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1284] <... futex resumed>) = 0
[pid 1283] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1284] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1284] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1284] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1283] <... futex resumed>) = 0
[pid 1283] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1284] <... futex resumed>) = 0
[pid 1283] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1284] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1284] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1284] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1283] <... futex resumed>) = 0
[pid 1283] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1284] <... futex resumed>) = 0
[pid 1284] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1283] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1284] <... umount2 resumed>) = 0
[pid 1284] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1284] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1283] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1283] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1283] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1285 attached
, parent_tid=[1285], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1285
[pid 1285] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1285] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1283] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1285] <... futex resumed>) = 0
[pid 1283] <... futex resumed>) = 1
[pid 1285] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1283] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1285] <... umount2 resumed>) = 0
[pid 1285] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1283] <... futex resumed>) = 0
[pid 1283] exit_group(0 <unfinished ...>
[pid 1285] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1284] <... futex resumed>) = ?
[pid 1284] +++ exited with 0 +++
[pid 1285] <... futex resumed>) = -1 (errno 18446744073709551414)
[pid 1285] +++ exited with 0 +++
[pid 1283] <... exit_group resumed>) = ?
[pid 1283] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1283, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1286
./strace-static-x86_64: Process 1286 attached
[pid 1286] set_robust_list(0x5555560865e0, 24) = 0
[pid 1286] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1286] setpgid(0, 0) = 0
[pid 1286] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1286] write(3, "1000", 4) = 4
[pid 1286] close(3) = 0
[pid 1286] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1286] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1286] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1286] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1287 attached
, parent_tid=[1287], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1287
[pid 1287] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1286] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1287] <... set_robust_list resumed>) = 0
[pid 1286] <... futex resumed>) = 0
[pid 1287] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1287] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1286] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1287] <... futex resumed>) = 0
[pid 1287] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1286] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1286] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1287] <... futex resumed>) = 0
[pid 1286] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1287] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1287] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1287] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1286] <... futex resumed>) = 0
[pid 1286] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1287] <... futex resumed>) = 0
[pid 1286] <... futex resumed>) = 1
[pid 1287] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1286] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1287] <... mount resumed>) = 0
[pid 1287] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1287] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1286] <... futex resumed>) = 0
[pid 1286] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1287] <... futex resumed>) = 0
[pid 1286] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1287] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1286] <... futex resumed>) = 0
[pid 1286] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1286] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1286] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1287] <... umount2 resumed>) = 0
[pid 1287] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1287] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1286] <... clone resumed>, parent_tid=[1288], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1288
[pid 1286] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1286] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1288 attached
<unfinished ...>
[pid 1288] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1288] umount2("./file0", MNT_DETACH) = 0
[pid 1288] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1286] <... futex resumed>) = 0
[pid 1286] exit_group(0) = ?
[pid 1287] <... futex resumed>) = ?
[pid 1287] +++ exited with 0 +++
[pid 1288] +++ exited with 0 +++
[pid 1286] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1286, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1289
./strace-static-x86_64: Process 1289 attached
[pid 1289] set_robust_list(0x5555560865e0, 24) = 0
[pid 1289] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1289] setpgid(0, 0) = 0
[pid 1289] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1289] write(3, "1000", 4) = 4
[pid 1289] close(3) = 0
[pid 1289] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1289] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1289] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1289] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1290], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1290
[pid 1289] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1289] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1290 attached
<unfinished ...>
[pid 1290] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1290] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1290] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1289] <... futex resumed>) = 0
[pid 1289] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1289] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1290] <... futex resumed>) = 1
[pid 1290] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1290] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1289] <... futex resumed>) = 0
[pid 1289] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1289] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1290] <... futex resumed>) = 1
[pid 1290] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1290] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1289] <... futex resumed>) = 0
[pid 1289] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1289] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1289] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1289] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1289] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1291], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1291
./strace-static-x86_64: Process 1291 attached
[pid 1289] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1289] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1290] <... futex resumed>) = 1
[pid 1290] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1291] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1290] <... umount2 resumed>) = 0
[pid 1291] <... set_robust_list resumed>) = 0
[pid 1290] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1290] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1291] umount2("./file0", MNT_DETACH) = 0
[pid 1291] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1289] <... futex resumed>) = 0
[pid 1291] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1289] exit_group(0) = ?
[pid 1290] <... futex resumed>) = ?
[pid 1290] +++ exited with 0 +++
[pid 1291] <... futex resumed>) = ?
[pid 1291] +++ exited with 0 +++
[pid 1289] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1289, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1292
./strace-static-x86_64: Process 1292 attached
[pid 1292] set_robust_list(0x5555560865e0, 24) = 0
[pid 1292] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1292] setpgid(0, 0) = 0
[pid 1292] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1292] write(3, "1000", 4) = 4
[pid 1292] close(3) = 0
[pid 1292] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1292] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1292] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1292] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1293 attached
, parent_tid=[1293], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1293
[pid 1293] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1293] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1292] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1293] <... futex resumed>) = 0
[pid 1293] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1293] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1293] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1292] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1292] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1293] <... futex resumed>) = 0
[pid 1293] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1292] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1293] <... mount resumed>) = 0
[pid 1293] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1293] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1292] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1292] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1293] <... futex resumed>) = 0
[pid 1292] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1293] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1293] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1292] <... futex resumed>) = 0
[pid 1292] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1292] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1292] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1293] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1292] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1293] <... umount2 resumed>) = 0
[pid 1292] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1294], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1294
[pid 1292] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1292] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1294 attached
<unfinished ...>
[pid 1293] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1294] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1293] <... futex resumed>) = 0
[pid 1294] <... set_robust_list resumed>) = 0
[pid 1293] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1294] umount2("./file0", MNT_DETACH) = 0
[pid 1294] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1292] <... futex resumed>) = 0
[pid 1294] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1292] exit_group(0) = ?
[pid 1294] <... futex resumed>) = ?
[pid 1293] <... futex resumed>) = ?
[pid 1293] +++ exited with 0 +++
[pid 1294] +++ exited with 0 +++
[pid 1292] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1292, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1295 attached
, child_tidptr=0x5555560865d0) = 1295
[pid 1295] set_robust_list(0x5555560865e0, 24) = 0
[pid 1295] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1295] setpgid(0, 0) = 0
[pid 1295] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1295] write(3, "1000", 4) = 4
[pid 1295] close(3) = 0
[pid 1295] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1295] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1295] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1295] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1296 attached
, parent_tid=[1296], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1296
[pid 1296] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1296] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1295] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1296] <... futex resumed>) = 0
[pid 1295] <... futex resumed>) = 1
[pid 1296] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1295] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1296] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1296] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1295] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1295] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1296] <... futex resumed>) = 0
[pid 1295] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1296] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1296] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1296] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1295] <... futex resumed>) = 0
[pid 1295] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1296] <... futex resumed>) = 0
[pid 1296] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1295] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1296] <... mount resumed>) = 0
[pid 1296] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1295] <... futex resumed>) = 0
[pid 1295] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1295] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1295] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1295] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1295] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1296] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1295] <... clone resumed>, parent_tid=[1297], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1297
[pid 1295] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1295] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1297 attached
<unfinished ...>
[pid 1297] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1297] umount2("./file0", MNT_DETACH) = 0
[pid 1297] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1295] <... futex resumed>) = 0
[pid 1296] <... umount2 resumed>) = 0
[pid 1297] <... futex resumed>) = 1
[pid 1296] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1297] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1296] <... futex resumed>) = 0
[pid 1296] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1295] exit_group(0) = ?
[pid 1296] <... futex resumed>) = ?
[pid 1297] <... futex resumed>) = ?
[pid 1297] +++ exited with 0 +++
[pid 1296] +++ exited with 0 +++
[pid 1295] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1295, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1298 attached
, child_tidptr=0x5555560865d0) = 1298
[pid 1298] set_robust_list(0x5555560865e0, 24) = 0
[pid 1298] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1298] setpgid(0, 0) = 0
[pid 1298] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1298] write(3, "1000", 4) = 4
[pid 1298] close(3) = 0
[pid 1298] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1298] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1298] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1298] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1299], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1299
./strace-static-x86_64: Process 1299 attached
[pid 1299] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1299] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1298] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1299] <... futex resumed>) = 0
[pid 1299] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1299] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1299] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1298] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1298] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1299] <... futex resumed>) = 0
[pid 1299] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1298] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1299] <... mount resumed>) = 0
[pid 1299] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1299] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1298] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1298] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1299] <... futex resumed>) = 0
[pid 1299] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1298] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1299] <... mount resumed>) = 0
[pid 1299] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1299] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1298] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1298] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1299] <... futex resumed>) = 0
[pid 1299] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1298] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1299] <... umount2 resumed>) = 0
[pid 1299] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1299] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1298] <... futex resumed>) = 0
[pid 1298] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1298] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1298] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1300], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1300
./strace-static-x86_64: Process 1300 attached
[pid 1300] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1300] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1298] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1300] <... futex resumed>) = 0
[pid 1300] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1298] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1300] <... umount2 resumed>) = 0
[pid 1300] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1300] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1298] <... futex resumed>) = 0
[pid 1298] exit_group(0 <unfinished ...>
[pid 1299] <... futex resumed>) = ?
[pid 1298] <... exit_group resumed>) = ?
[pid 1299] +++ exited with 0 +++
[pid 1300] <... futex resumed>) = ?
[pid 1300] +++ exited with 0 +++
[pid 1298] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1298, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1301
./strace-static-x86_64: Process 1301 attached
[pid 1301] set_robust_list(0x5555560865e0, 24) = 0
[pid 1301] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1301] setpgid(0, 0) = 0
[pid 1301] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1301] write(3, "1000", 4) = 4
[pid 1301] close(3) = 0
[pid 1301] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1301] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1301] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1301] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1302 attached
, parent_tid=[1302], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1302
[pid 1302] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1301] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1302] <... set_robust_list resumed>) = 0
[pid 1301] <... futex resumed>) = 0
[pid 1301] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1302] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1302] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1301] <... futex resumed>) = 0
[pid 1302] <... futex resumed>) = 1
[pid 1301] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1302] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1301] <... futex resumed>) = 0
[pid 1301] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1302] <... mount resumed>) = 0
[pid 1302] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1301] <... futex resumed>) = 0
[pid 1302] <... futex resumed>) = 1
[pid 1301] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1302] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1301] <... futex resumed>) = 0
[pid 1301] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1302] <... mount resumed>) = 0
[pid 1302] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1301] <... futex resumed>) = 0
[pid 1302] <... futex resumed>) = 1
[pid 1301] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1302] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1301] <... futex resumed>) = 0
[pid 1301] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1301] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1301] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1301] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1302] <... umount2 resumed>) = 0
[pid 1302] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1303 attached
<unfinished ...>
[pid 1301] <... clone resumed>, parent_tid=[1303], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1303
[pid 1301] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1302] <... futex resumed>) = 0
[pid 1303] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1302] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1301] <... futex resumed>) = 0
[pid 1303] <... set_robust_list resumed>) = 0
[pid 1301] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1303] umount2("./file0", MNT_DETACH) = 0
[pid 1303] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1301] <... futex resumed>) = 0
[pid 1303] <... futex resumed>) = 1
[pid 1301] exit_group(0 <unfinished ...>
[pid 1303] ????( <unfinished ...>
[pid 1301] <... exit_group resumed>) = ?
[pid 1303] <... ???? resumed>) = ?
[pid 1302] <... futex resumed>) = ?
[pid 1302] +++ exited with 0 +++
[pid 1303] +++ exited with 0 +++
[pid 1301] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1301, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1304
./strace-static-x86_64: Process 1304 attached
[pid 1304] set_robust_list(0x5555560865e0, 24) = 0
[pid 1304] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1304] setpgid(0, 0) = 0
[pid 1304] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1304] write(3, "1000", 4) = 4
[pid 1304] close(3) = 0
[pid 1304] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1304] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1304] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1304] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1305], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1305
[pid 1304] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1304] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1305 attached
<unfinished ...>
[pid 1305] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1305] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1305] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1304] <... futex resumed>) = 0
[pid 1304] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1304] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1305] <... futex resumed>) = 1
[pid 1305] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1305] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1304] <... futex resumed>) = 0
[pid 1304] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1304] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1305] <... futex resumed>) = 1
[pid 1305] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1305] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1304] <... futex resumed>) = 0
[pid 1304] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1304] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1304] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1304] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1304] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1306], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1306
[pid 1304] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1304] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1305] <... futex resumed>) = 1
[pid 1305] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 1306 attached
) = 0
[pid 1306] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1305] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1306] <... set_robust_list resumed>) = 0
[pid 1305] <... futex resumed>) = 0
[pid 1306] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1305] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1306] <... umount2 resumed>) = 0
[pid 1306] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1304] <... futex resumed>) = 0
[pid 1304] exit_group(0) = ?
[pid 1305] <... futex resumed>) = ?
[pid 1305] +++ exited with 0 +++
[pid 1306] +++ exited with 0 +++
[pid 1304] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1304, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1307
./strace-static-x86_64: Process 1307 attached
[pid 1307] set_robust_list(0x5555560865e0, 24) = 0
[pid 1307] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1307] setpgid(0, 0) = 0
[pid 1307] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1307] write(3, "1000", 4) = 4
[pid 1307] close(3) = 0
[pid 1307] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1307] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1307] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1307] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1308 attached
, parent_tid=[1308], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1308
[pid 1308] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1307] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1308] <... set_robust_list resumed>) = 0
[pid 1307] <... futex resumed>) = 0
[pid 1307] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1308] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1308] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1307] <... futex resumed>) = 0
[pid 1308] <... futex resumed>) = 1
[pid 1307] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1308] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1307] <... futex resumed>) = 0
[pid 1307] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1308] <... mount resumed>) = 0
[pid 1308] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1307] <... futex resumed>) = 0
[pid 1307] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1307] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1308] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1308] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1307] <... futex resumed>) = 0
[pid 1307] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1307] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1307] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1307] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1307] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1309 attached
, parent_tid=[1309], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1309
[pid 1309] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1307] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1309] <... set_robust_list resumed>) = 0
[pid 1308] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1307] <... futex resumed>) = 0
[pid 1309] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1307] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1308] <... umount2 resumed>) = 0
[pid 1309] <... umount2 resumed>) = 0
[pid 1309] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1307] <... futex resumed>) = 0
[pid 1308] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1309] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1307] exit_group(0 <unfinished ...>
[pid 1308] <... futex resumed>) = ? <unavailable>
[pid 1307] <... exit_group resumed>) = ?
[pid 1309] <... futex resumed>) = ?
[pid 1309] +++ exited with 0 +++
[pid 1308] +++ exited with 0 +++
[pid 1307] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1307, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1310
./strace-static-x86_64: Process 1310 attached
[pid 1310] set_robust_list(0x5555560865e0, 24) = 0
[pid 1310] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1310] setpgid(0, 0) = 0
[pid 1310] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1310] write(3, "1000", 4) = 4
[pid 1310] close(3) = 0
[pid 1310] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1310] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1310] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1310] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1311], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1311
[pid 1310] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1310] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1311 attached
<unfinished ...>
[pid 1311] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1311] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1311] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1310] <... futex resumed>) = 0
[pid 1310] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1310] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1311] <... futex resumed>) = 1
[pid 1311] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1311] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1310] <... futex resumed>) = 0
[pid 1310] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1310] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1311] <... futex resumed>) = 1
[pid 1311] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1311] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1310] <... futex resumed>) = 0
[pid 1310] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1310] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1310] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1310] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1310] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1312], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1312
[pid 1310] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1310] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1311] <... futex resumed>) = 1
[pid 1311] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 1312 attached
) = 0
[pid 1312] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1311] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1312] <... set_robust_list resumed>) = 0
[pid 1311] <... futex resumed>) = 0
[pid 1312] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1311] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1312] <... umount2 resumed>) = 0
[pid 1312] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1310] <... futex resumed>) = 0
[pid 1312] <... futex resumed>) = 1
[pid 1310] exit_group(0 <unfinished ...>
[pid 1312] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1310] <... exit_group resumed>) = ?
[pid 1311] <... futex resumed>) = ?
[pid 1311] +++ exited with 0 +++
[pid 1312] <... futex resumed>) = ?
[pid 1312] +++ exited with 0 +++
[pid 1310] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1310, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1313
./strace-static-x86_64: Process 1313 attached
[pid 1313] set_robust_list(0x5555560865e0, 24) = 0
[pid 1313] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1313] setpgid(0, 0) = 0
[pid 1313] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1313] write(3, "1000", 4) = 4
[pid 1313] close(3) = 0
[pid 1313] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1313] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1313] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1313] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1314], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1314
[pid 1313] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1313] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1314 attached
<unfinished ...>
[pid 1314] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1314] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1314] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1313] <... futex resumed>) = 0
[pid 1313] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1313] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1314] <... futex resumed>) = 1
[pid 1314] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1314] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1313] <... futex resumed>) = 0
[pid 1313] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1313] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1314] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1314] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1313] <... futex resumed>) = 0
[pid 1313] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1313] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1313] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1313] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1313] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1315 attached
, parent_tid=[1315], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1315
[pid 1315] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1313] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1315] <... set_robust_list resumed>) = 0
[pid 1313] <... futex resumed>) = 0
[pid 1315] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1313] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1314] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1315] <... umount2 resumed>) = 0
[pid 1315] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1313] <... futex resumed>) = 0
[pid 1315] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1314] <... umount2 resumed>) = 0
[pid 1314] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1314] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1313] exit_group(0) = ?
[pid 1315] <... futex resumed>) = ?
[pid 1315] +++ exited with 0 +++
[pid 1314] <... futex resumed>) = ?
[pid 1314] +++ exited with 0 +++
[pid 1313] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1313, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1316 attached
, child_tidptr=0x5555560865d0) = 1316
[pid 1316] set_robust_list(0x5555560865e0, 24) = 0
[pid 1316] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1316] setpgid(0, 0) = 0
[pid 1316] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1316] write(3, "1000", 4) = 4
[pid 1316] close(3) = 0
[pid 1316] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1316] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1316] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1316] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1317 attached
, parent_tid=[1317], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1317
[pid 1317] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1317] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1316] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1317] <... futex resumed>) = 0
[pid 1317] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1317] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1317] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1316] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1316] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1317] <... futex resumed>) = 0
[pid 1317] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1316] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1317] <... mount resumed>) = 0
[pid 1317] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1317] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1316] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1316] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1317] <... futex resumed>) = 0
[pid 1317] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1316] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1317] <... mount resumed>) = 0
[pid 1317] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1317] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1316] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1316] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1317] <... futex resumed>) = 0
[pid 1317] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1316] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1316] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1316] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1316] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1317] <... umount2 resumed>) = 0
[pid 1317] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1317] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1316] <... clone resumed>, parent_tid=[1318], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1318
[pid 1316] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1316] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1318 attached
<unfinished ...>
[pid 1318] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1318] umount2("./file0", MNT_DETACH) = 0
[pid 1318] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1316] <... futex resumed>) = 0
[pid 1316] exit_group(0) = ?
[pid 1317] <... futex resumed>) = ?
[pid 1317] +++ exited with 0 +++
[pid 1318] +++ exited with 0 +++
[pid 1316] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1316, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1319
./strace-static-x86_64: Process 1319 attached
[pid 1319] set_robust_list(0x5555560865e0, 24) = 0
[pid 1319] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1319] setpgid(0, 0) = 0
[pid 1319] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1319] write(3, "1000", 4) = 4
[pid 1319] close(3) = 0
[pid 1319] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1319] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1319] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1319] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1320], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1320
[pid 1319] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1319] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1320 attached
<unfinished ...>
[pid 1320] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1320] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1320] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1319] <... futex resumed>) = 0
[pid 1319] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1319] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1320] <... futex resumed>) = 1
[pid 1320] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1320] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1319] <... futex resumed>) = 0
[pid 1319] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1319] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1320] <... futex resumed>) = 1
[pid 1320] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1320] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1319] <... futex resumed>) = 0
[pid 1320] <... futex resumed>) = 1
[pid 1319] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1320] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1319] <... futex resumed>) = 0
[pid 1319] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1319] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1319] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1319] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1321], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1321
./strace-static-x86_64: Process 1321 attached
[pid 1320] <... umount2 resumed>) = 0
[pid 1319] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1321] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1320] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1319] <... futex resumed>) = 0
[pid 1321] <... set_robust_list resumed>) = 0
[pid 1320] <... futex resumed>) = 0
[pid 1319] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1321] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1320] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1321] <... umount2 resumed>) = 0
[pid 1321] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1319] <... futex resumed>) = 0
[pid 1321] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1319] exit_group(0 <unfinished ...>
[pid 1320] <... futex resumed>) = ?
[pid 1319] <... exit_group resumed>) = ?
[pid 1321] <... futex resumed>) = 231
[pid 1320] +++ exited with 0 +++
[pid 1321] +++ exited with 0 +++
[pid 1319] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1319, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1322
./strace-static-x86_64: Process 1322 attached
[pid 1322] set_robust_list(0x5555560865e0, 24) = 0
[pid 1322] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1322] setpgid(0, 0) = 0
[pid 1322] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1322] write(3, "1000", 4) = 4
[pid 1322] close(3) = 0
[pid 1322] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1322] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1322] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1322] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1323 attached
, parent_tid=[1323], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1323
[pid 1323] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1322] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1323] <... set_robust_list resumed>) = 0
[pid 1322] <... futex resumed>) = 0
[pid 1322] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1323] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1323] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1322] <... futex resumed>) = 0
[pid 1322] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1322] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1323] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1323] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1322] <... futex resumed>) = 0
[pid 1322] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1322] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1323] <... futex resumed>) = 1
[pid 1323] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1323] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1322] <... futex resumed>) = 0
[pid 1323] <... futex resumed>) = 1
[pid 1322] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1323] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1322] <... futex resumed>) = 0
[pid 1322] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1322] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1322] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1322] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1323] <... umount2 resumed>) = 0
[pid 1323] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1324 attached
) = 0
[pid 1322] <... clone resumed>, parent_tid=[1324], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1324
[pid 1324] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1323] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1322] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1324] <... set_robust_list resumed>) = 0
[pid 1322] <... futex resumed>) = 0
[pid 1324] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1322] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1324] <... umount2 resumed>) = 0
[pid 1324] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1322] <... futex resumed>) = 0
[pid 1324] <... futex resumed>) = 1
[pid 1322] exit_group(0 <unfinished ...>
[pid 1324] ????( <unfinished ...>
[pid 1322] <... exit_group resumed>) = ?
[pid 1324] <... ???? resumed>) = ?
[pid 1323] <... futex resumed>) = ?
[pid 1323] +++ exited with 0 +++
[pid 1324] +++ exited with 0 +++
[pid 1322] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1322, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1325
./strace-static-x86_64: Process 1325 attached
[pid 1325] set_robust_list(0x5555560865e0, 24) = 0
[pid 1325] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1325] setpgid(0, 0) = 0
[pid 1325] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1325] write(3, "1000", 4) = 4
[pid 1325] close(3) = 0
[pid 1325] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1325] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1325] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1325] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1326 attached
, parent_tid=[1326], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1326
[pid 1326] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1326] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1325] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1326] <... futex resumed>) = 0
[pid 1326] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1326] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1326] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1325] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1325] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1326] <... futex resumed>) = 0
[pid 1325] <... futex resumed>) = 1
[pid 1326] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1326] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1326] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1325] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1325] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1326] <... futex resumed>) = 0
[pid 1326] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1325] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1326] <... mount resumed>) = 0
[pid 1326] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1326] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1325] <... futex resumed>) = 0
[pid 1325] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1325] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1325] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1325] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1325] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1327 attached
<unfinished ...>
[pid 1326] <... futex resumed>) = 0
[pid 1326] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1327] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1325] <... clone resumed>, parent_tid=[1327], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1327
[pid 1325] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1327] <... set_robust_list resumed>) = 0
[pid 1325] <... futex resumed>) = 0
[pid 1325] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1327] umount2("./file0", MNT_DETACH) = 0
[pid 1326] <... umount2 resumed>) = 0
[pid 1327] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1326] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1326] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1327] <... futex resumed>) = 1
[pid 1325] <... futex resumed>) = 0
[pid 1327] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1325] exit_group(0) = ?
[pid 1327] <... futex resumed>) = ?
[pid 1326] <... futex resumed>) = ?
[pid 1326] +++ exited with 0 +++
[pid 1327] +++ exited with 0 +++
[pid 1325] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1325, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1328
./strace-static-x86_64: Process 1328 attached
[pid 1328] set_robust_list(0x5555560865e0, 24) = 0
[pid 1328] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1328] setpgid(0, 0) = 0
[pid 1328] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1328] write(3, "1000", 4) = 4
[pid 1328] close(3) = 0
[pid 1328] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1328] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1328] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1328] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1329 attached
, parent_tid=[1329], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1329
[pid 1329] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1328] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1328] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1329] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1329] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1328] <... futex resumed>) = 0
[pid 1328] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1328] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1329] <... futex resumed>) = 1
[pid 1329] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1329] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1328] <... futex resumed>) = 0
[pid 1329] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1328] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1328] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1329] <... mount resumed>) = 0
[pid 1329] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1328] <... futex resumed>) = 0
[pid 1328] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1328] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1328] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1328] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1329] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1328] <... mprotect resumed>) = 0
[pid 1329] <... umount2 resumed>) = 0
[pid 1328] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1329] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1330 attached
) = 0
[pid 1328] <... clone resumed>, parent_tid=[1330], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1330
[pid 1328] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1329] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1328] <... futex resumed>) = 0
[pid 1328] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1330] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1330] umount2("./file0", MNT_DETACH) = 0
[pid 1330] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1328] <... futex resumed>) = 0
[pid 1328] exit_group(0) = ?
[pid 1329] <... futex resumed>) = ?
[pid 1329] +++ exited with 0 +++
[pid 1330] +++ exited with 0 +++
[pid 1328] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1328, si_uid=0, si_status=0, si_utime=0, si_stime=1} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1331
./strace-static-x86_64: Process 1331 attached
[pid 1331] set_robust_list(0x5555560865e0, 24) = 0
[pid 1331] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1331] setpgid(0, 0) = 0
[pid 1331] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1331] write(3, "1000", 4) = 4
[pid 1331] close(3) = 0
[pid 1331] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1331] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1331] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1331] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1332 attached
, parent_tid=[1332], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1332
[pid 1332] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1332] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1331] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1332] <... futex resumed>) = 0
[pid 1332] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1332] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1332] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1331] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1331] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1332] <... futex resumed>) = 0
[pid 1332] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1331] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1332] <... mount resumed>) = 0
[pid 1332] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1332] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1331] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1331] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1332] <... futex resumed>) = 0
[pid 1332] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1331] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1332] <... mount resumed>) = 0
[pid 1332] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1332] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1331] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1331] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1332] <... futex resumed>) = 0
[pid 1332] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1331] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1332] <... umount2 resumed>) = 0
[pid 1332] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1332] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1331] <... futex resumed>) = 0
[pid 1331] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1331] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1331] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1333 attached
<unfinished ...>
[pid 1333] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1333] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1331] <... clone resumed>, parent_tid=[1333], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1333
[pid 1331] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1331] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1333] <... futex resumed>) = 0
[pid 1333] umount2("./file0", MNT_DETACH) = 0
[pid 1333] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1331] <... futex resumed>) = 0
[pid 1333] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1331] exit_group(0) = ?
[pid 1332] <... futex resumed>) = 231
[pid 1332] +++ exited with 0 +++
[pid 1333] <... futex resumed>) = ?
[pid 1333] +++ exited with 0 +++
[pid 1331] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1331, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1334
./strace-static-x86_64: Process 1334 attached
[pid 1334] set_robust_list(0x5555560865e0, 24) = 0
[pid 1334] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1334] setpgid(0, 0) = 0
[pid 1334] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1334] write(3, "1000", 4) = 4
[pid 1334] close(3) = 0
[pid 1334] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1334] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1334] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1334] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1335 attached
<unfinished ...>
[pid 1335] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1334] <... clone resumed>, parent_tid=[1335], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1335
[pid 1335] <... set_robust_list resumed>) = 0
[pid 1335] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1334] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1335] <... futex resumed>) = 0
[pid 1335] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1335] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1335] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1334] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1334] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1335] <... futex resumed>) = 0
[pid 1335] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1334] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1335] <... mount resumed>) = 0
[pid 1335] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1335] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1334] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1334] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1335] <... futex resumed>) = 0
[pid 1335] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1334] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1335] <... mount resumed>) = 0
[pid 1335] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1335] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1334] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1334] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1335] <... futex resumed>) = 0
[pid 1334] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1335] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1334] <... futex resumed>) = 0
[pid 1334] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1334] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1335] <... umount2 resumed>) = 0
[pid 1334] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1335] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1335] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1336 attached
<unfinished ...>
[pid 1334] <... clone resumed>, parent_tid=[1336], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1336
[pid 1334] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1336] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1334] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1336] <... set_robust_list resumed>) = 0
[pid 1336] umount2("./file0", MNT_DETACH) = 0
[pid 1336] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1336] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1334] <... futex resumed>) = 0
[pid 1334] exit_group(0 <unfinished ...>
[pid 1335] <... futex resumed>) = ?
[pid 1334] <... exit_group resumed>) = ?
[pid 1335] +++ exited with 0 +++
[pid 1336] <... futex resumed>) = ?
[pid 1336] +++ exited with 0 +++
[pid 1334] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1334, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1337
./strace-static-x86_64: Process 1337 attached
[pid 1337] set_robust_list(0x5555560865e0, 24) = 0
[pid 1337] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1337] setpgid(0, 0) = 0
[pid 1337] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1337] write(3, "1000", 4) = 4
[pid 1337] close(3) = 0
[pid 1337] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1337] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1337] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1337] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1338 attached
, parent_tid=[1338], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1338
[pid 1338] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1337] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1338] <... set_robust_list resumed>) = 0
[pid 1337] <... futex resumed>) = 0
[pid 1337] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1338] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1338] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1337] <... futex resumed>) = 0
[pid 1338] <... futex resumed>) = 1
[pid 1337] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1338] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1337] <... futex resumed>) = 0
[pid 1337] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1338] <... mount resumed>) = 0
[pid 1338] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1337] <... futex resumed>) = 0
[pid 1338] <... futex resumed>) = 1
[pid 1337] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1338] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1337] <... futex resumed>) = 0
[pid 1337] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1338] <... mount resumed>) = 0
[pid 1338] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1337] <... futex resumed>) = 0
[pid 1338] <... futex resumed>) = 1
[pid 1337] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1338] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1337] <... futex resumed>) = 0
[pid 1337] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1337] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1337] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1338] <... umount2 resumed>) = 0
[pid 1338] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1337] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1338] <... futex resumed>) = 0
[pid 1338] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1339 attached
<unfinished ...>
[pid 1337] <... clone resumed>, parent_tid=[1339], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1339
[pid 1339] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1337] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1339] <... set_robust_list resumed>) = 0
[pid 1337] <... futex resumed>) = 0
[pid 1339] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1337] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1339] <... umount2 resumed>) = 0
[pid 1339] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1337] <... futex resumed>) = 0
[pid 1339] <... futex resumed>) = 1
[pid 1339] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1337] exit_group(0 <unfinished ...>
[pid 1339] <... futex resumed>) = ?
[pid 1338] <... futex resumed>) = ?
[pid 1337] <... exit_group resumed>) = ?
[pid 1338] +++ exited with 0 +++
[pid 1339] +++ exited with 0 +++
[pid 1337] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1337, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1340
./strace-static-x86_64: Process 1340 attached
[pid 1340] set_robust_list(0x5555560865e0, 24) = 0
[pid 1340] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1340] setpgid(0, 0) = 0
[pid 1340] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1340] write(3, "1000", 4) = 4
[pid 1340] close(3) = 0
[pid 1340] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1340] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1340] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1340] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1341 attached
, parent_tid=[1341], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1341
[pid 1341] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1340] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1341] <... set_robust_list resumed>) = 0
[pid 1340] <... futex resumed>) = 0
[pid 1341] mkdir("./file0", 000 <unfinished ...>
[pid 1340] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1341] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1341] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1340] <... futex resumed>) = 0
[pid 1340] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1341] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1340] <... futex resumed>) = 0
[pid 1340] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1341] <... mount resumed>) = 0
[pid 1341] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1340] <... futex resumed>) = 0
[pid 1341] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1340] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1340] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1341] <... mount resumed>) = 0
[pid 1341] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1340] <... futex resumed>) = 0
[pid 1341] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1340] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1340] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1340] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1341] <... umount2 resumed>) = 0
[pid 1340] <... mmap resumed>) = 0x7f236e446000
[pid 1341] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1340] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1341] <... futex resumed>) = 0
[pid 1340] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1341] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1342 attached
<unfinished ...>
[pid 1342] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1342] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1340] <... clone resumed>, parent_tid=[1342], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1342
[pid 1340] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1342] <... futex resumed>) = 0
[pid 1342] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1340] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1342] <... umount2 resumed>) = 0
[pid 1342] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1342] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1340] <... futex resumed>) = 0
[pid 1340] exit_group(0) = ?
[pid 1341] <... futex resumed>) = ?
[pid 1342] <... futex resumed>) = ?
[pid 1341] +++ exited with 0 +++
[pid 1342] +++ exited with 0 +++
[pid 1340] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1340, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1343 attached
, child_tidptr=0x5555560865d0) = 1343
[pid 1343] set_robust_list(0x5555560865e0, 24) = 0
[pid 1343] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1343] setpgid(0, 0) = 0
[pid 1343] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1343] write(3, "1000", 4) = 4
[pid 1343] close(3) = 0
[pid 1343] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1343] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1343] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1343] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1344 attached
, parent_tid=[1344], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1344
[pid 1344] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1344] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1343] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1344] <... futex resumed>) = 0
[pid 1344] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1344] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1344] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1343] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1343] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1344] <... futex resumed>) = 0
[pid 1344] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1343] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1344] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1344] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1343] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1343] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1344] <... futex resumed>) = 0
[pid 1344] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1343] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1344] <... mount resumed>) = 0
[pid 1344] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1343] <... futex resumed>) = 0
[pid 1343] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1343] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1343] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1343] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1344] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1343] <... mprotect resumed>) = 0
[pid 1343] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1345], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1345
[pid 1343] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1343] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1345 attached
<unfinished ...>
[pid 1344] <... umount2 resumed>) = 0
[pid 1345] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1344] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1345] <... set_robust_list resumed>) = 0
[pid 1344] <... futex resumed>) = 0
[pid 1345] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1344] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1345] <... umount2 resumed>) = 0
[pid 1345] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1345] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1343] <... futex resumed>) = 0
[pid 1343] exit_group(0) = ?
[pid 1345] <... futex resumed>) = 231
[pid 1344] <... futex resumed>) = ?
[pid 1344] +++ exited with 0 +++
[pid 1345] +++ exited with 0 +++
[pid 1343] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1343, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1346 attached
, child_tidptr=0x5555560865d0) = 1346
[pid 1346] set_robust_list(0x5555560865e0, 24) = 0
[pid 1346] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1346] setpgid(0, 0) = 0
[pid 1346] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1346] write(3, "1000", 4) = 4
[pid 1346] close(3) = 0
[pid 1346] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1346] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1346] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1346] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1347 attached
<unfinished ...>
[pid 1347] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1347] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1346] <... clone resumed>, parent_tid=[1347], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1347
[pid 1346] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1347] <... futex resumed>) = 0
[pid 1347] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1347] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1347] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1346] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1346] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1347] <... futex resumed>) = 0
[pid 1347] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1346] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1347] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1347] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1346] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1346] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1347] <... futex resumed>) = 0
[pid 1346] <... futex resumed>) = 1
[pid 1347] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1346] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1347] <... mount resumed>) = 0
[pid 1347] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1347] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1346] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1346] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1347] <... futex resumed>) = 0
[pid 1347] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1346] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1347] <... umount2 resumed>) = 0
[pid 1347] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1347] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1346] <... futex resumed>) = 0
[pid 1346] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1346] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1346] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1348 attached
<unfinished ...>
[pid 1348] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1346] <... clone resumed>, parent_tid=[1348], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1348
[pid 1348] <... set_robust_list resumed>) = 0
[pid 1348] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1346] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1348] <... futex resumed>) = 0
[pid 1346] <... futex resumed>) = 1
[pid 1348] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1346] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1348] <... umount2 resumed>) = 0
[pid 1348] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1346] <... futex resumed>) = 0
[pid 1348] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1346] exit_group(0 <unfinished ...>
[pid 1348] <... futex resumed>) = ?
[pid 1347] <... futex resumed>) = ?
[pid 1346] <... exit_group resumed>) = ?
[pid 1347] +++ exited with 0 +++
[pid 1348] +++ exited with 0 +++
[pid 1346] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1346, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1349
./strace-static-x86_64: Process 1349 attached
[pid 1349] set_robust_list(0x5555560865e0, 24) = 0
[pid 1349] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1349] setpgid(0, 0) = 0
[pid 1349] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1349] write(3, "1000", 4) = 4
[pid 1349] close(3) = 0
[pid 1349] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1349] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1349] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1349] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1350], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1350
[pid 1349] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1349] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1350 attached
<unfinished ...>
[pid 1350] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1350] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1350] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1349] <... futex resumed>) = 0
[pid 1349] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1349] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1350] <... futex resumed>) = 1
[pid 1350] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1350] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1349] <... futex resumed>) = 0
[pid 1350] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1349] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1350] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1349] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1350] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1350] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1349] <... futex resumed>) = 0
[pid 1350] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1349] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1350] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1349] <... futex resumed>) = 0
[pid 1349] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1350] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1349] <... futex resumed>) = 0
[pid 1349] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1349] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1349] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1351 attached
, parent_tid=[1351], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1351
[pid 1350] <... umount2 resumed>) = 0
[pid 1349] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1351] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1350] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1349] <... futex resumed>) = 0
[pid 1351] <... set_robust_list resumed>) = 0
[pid 1350] <... futex resumed>) = 0
[pid 1349] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1351] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1350] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1351] <... umount2 resumed>) = 0
[pid 1351] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1349] <... futex resumed>) = 0
[pid 1351] <... futex resumed>) = 1
[pid 1351] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1349] exit_group(0) = ?
[pid 1350] <... futex resumed>) = ?
[pid 1351] <... futex resumed>) = ?
[pid 1351] +++ exited with 0 +++
[pid 1350] +++ exited with 0 +++
[pid 1349] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1349, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1352
./strace-static-x86_64: Process 1352 attached
[pid 1352] set_robust_list(0x5555560865e0, 24) = 0
[pid 1352] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1352] setpgid(0, 0) = 0
[pid 1352] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1352] write(3, "1000", 4) = 4
[pid 1352] close(3) = 0
[pid 1352] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1352] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1352] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1352] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1353 attached
, parent_tid=[1353], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1353
[pid 1353] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1352] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1353] <... set_robust_list resumed>) = 0
[pid 1352] <... futex resumed>) = 0
[pid 1352] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1353] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1353] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1352] <... futex resumed>) = 0
[pid 1353] <... futex resumed>) = 1
[pid 1352] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1353] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1352] <... futex resumed>) = 0
[pid 1352] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1353] <... mount resumed>) = 0
[pid 1353] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1352] <... futex resumed>) = 0
[pid 1353] <... futex resumed>) = 1
[pid 1352] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1353] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1352] <... futex resumed>) = 0
[pid 1352] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1353] <... mount resumed>) = 0
[pid 1353] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1352] <... futex resumed>) = 0
[pid 1353] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1352] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1352] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1352] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1352] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1352] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1353] <... umount2 resumed>) = 0
[pid 1352] <... clone resumed>, parent_tid=[1354], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1354
[pid 1352] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1353] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1352] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1353] <... futex resumed>) = 0
[pid 1353] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1354 attached
<unfinished ...>
[pid 1354] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1354] umount2("./file0", MNT_DETACH) = 0
[pid 1354] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1352] <... futex resumed>) = 0
[pid 1354] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1352] exit_group(0) = ?
[pid 1353] <... futex resumed>) = ?
[pid 1354] <... futex resumed>) = ?
[pid 1353] +++ exited with 0 +++
[pid 1354] +++ exited with 0 +++
[pid 1352] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1352, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1355
./strace-static-x86_64: Process 1355 attached
[pid 1355] set_robust_list(0x5555560865e0, 24) = 0
[pid 1355] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1355] setpgid(0, 0) = 0
[pid 1355] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1355] write(3, "1000", 4) = 4
[pid 1355] close(3) = 0
[pid 1355] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1355] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1355] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1355] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1356 attached
, parent_tid=[1356], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1356
[pid 1356] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1356] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1355] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1356] <... futex resumed>) = 0
[pid 1356] mkdir("./file0", 000 <unfinished ...>
[pid 1355] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1356] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1356] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1356] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1355] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1355] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1356] <... futex resumed>) = 0
[pid 1356] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1355] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1356] <... mount resumed>) = 0
[pid 1356] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1356] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1355] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1355] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1356] <... futex resumed>) = 0
[pid 1355] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1356] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1356] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1356] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1355] <... futex resumed>) = 0
[pid 1355] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1356] <... futex resumed>) = 0
[pid 1355] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1356] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1355] <... futex resumed>) = 0
[pid 1355] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1356] <... umount2 resumed>) = 0
[pid 1356] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1356] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1355] <... mmap resumed>) = 0x7f236e446000
[pid 1355] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1355] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1357 attached
<unfinished ...>
[pid 1357] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1355] <... clone resumed>, parent_tid=[1357], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1357
[pid 1357] <... set_robust_list resumed>) = 0
[pid 1355] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1357] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1355] <... futex resumed>) = 0
[pid 1355] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1357] <... umount2 resumed>) = 0
[pid 1357] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1355] <... futex resumed>) = 0
[pid 1357] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1355] exit_group(0) = ?
[pid 1357] <... futex resumed>) = ?
[pid 1356] <... futex resumed>) = ?
[pid 1356] +++ exited with 0 +++
[pid 1357] +++ exited with 0 +++
[pid 1355] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1355, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1358
./strace-static-x86_64: Process 1358 attached
[pid 1358] set_robust_list(0x5555560865e0, 24) = 0
[pid 1358] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1358] setpgid(0, 0) = 0
[pid 1358] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1358] write(3, "1000", 4) = 4
[pid 1358] close(3) = 0
[pid 1358] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1358] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1358] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1358] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1359 attached
, parent_tid=[1359], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1359
[pid 1359] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1359] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1358] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1359] <... futex resumed>) = 0
[pid 1359] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1359] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1359] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1358] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1358] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1359] <... futex resumed>) = 0
[pid 1359] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1358] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1359] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1359] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1358] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1358] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1359] <... futex resumed>) = 0
[pid 1359] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1358] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1359] <... mount resumed>) = 0
[pid 1359] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1359] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1358] <... futex resumed>) = 0
[pid 1358] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1359] <... futex resumed>) = 0
[pid 1358] <... futex resumed>) = 1
[pid 1359] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1358] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1359] <... umount2 resumed>) = 0
[pid 1359] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1359] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1358] <... futex resumed>) = 0
[pid 1358] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1358] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1358] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1360 attached
, parent_tid=[1360], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1360
[pid 1360] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1360] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1358] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1360] <... futex resumed>) = 0
[pid 1360] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1358] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1360] <... umount2 resumed>) = 0
[pid 1360] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1360] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1358] <... futex resumed>) = 0
[pid 1358] exit_group(0 <unfinished ...>
[pid 1359] <... futex resumed>) = ?
[pid 1358] <... exit_group resumed>) = ?
[pid 1359] +++ exited with 0 +++
[pid 1360] <... futex resumed>) = ?
[pid 1360] +++ exited with 0 +++
[pid 1358] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1358, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1361
./strace-static-x86_64: Process 1361 attached
[pid 1361] set_robust_list(0x5555560865e0, 24) = 0
[pid 1361] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1361] setpgid(0, 0) = 0
[pid 1361] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1361] write(3, "1000", 4) = 4
[pid 1361] close(3) = 0
[pid 1361] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1361] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1361] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1361] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1362 attached
<unfinished ...>
[pid 1362] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1362] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1361] <... clone resumed>, parent_tid=[1362], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1362
[pid 1361] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1362] <... futex resumed>) = 0
[pid 1362] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1362] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1362] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1361] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1361] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1362] <... futex resumed>) = 0
[pid 1362] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1361] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1362] <... mount resumed>) = 0
[pid 1362] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1362] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1361] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1361] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1362] <... futex resumed>) = 0
[pid 1362] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1361] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1362] <... mount resumed>) = 0
[pid 1362] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1362] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1361] <... futex resumed>) = 0
[pid 1361] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1362] <... futex resumed>) = 0
[pid 1362] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1361] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1362] <... umount2 resumed>) = 0
[pid 1362] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1362] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1361] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1361] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1361] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1363 attached
<unfinished ...>
[pid 1363] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1363] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1361] <... clone resumed>, parent_tid=[1363], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1363
[pid 1361] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1363] <... futex resumed>) = 0
[pid 1363] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1361] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1363] <... umount2 resumed>) = 0
[pid 1363] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1363] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1361] <... futex resumed>) = 0
[pid 1361] exit_group(0) = ?
[pid 1362] <... futex resumed>) = ?
[pid 1362] +++ exited with 0 +++
[pid 1363] <... futex resumed>) = ?
[pid 1363] +++ exited with 0 +++
[pid 1361] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1361, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1364
./strace-static-x86_64: Process 1364 attached
[pid 1364] set_robust_list(0x5555560865e0, 24) = 0
[pid 1364] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1364] setpgid(0, 0) = 0
[pid 1364] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1364] write(3, "1000", 4) = 4
[pid 1364] close(3) = 0
[pid 1364] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1364] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1364] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1364] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1365], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1365
[pid 1364] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1364] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1365 attached
<unfinished ...>
[pid 1365] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1365] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1365] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1364] <... futex resumed>) = 0
[pid 1364] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1364] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1365] <... futex resumed>) = 1
[pid 1365] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1365] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1364] <... futex resumed>) = 0
[pid 1364] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1364] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1365] <... futex resumed>) = 1
[pid 1365] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1365] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1364] <... futex resumed>) = 0
[pid 1364] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1364] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1364] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1364] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1364] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1366 attached
, parent_tid=[1366], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1366
[pid 1364] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1364] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1365] <... futex resumed>) = 1
[pid 1365] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1366] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1365] <... umount2 resumed>) = 0
[pid 1365] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1366] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1365] <... futex resumed>) = 0
[pid 1365] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1366] <... umount2 resumed>) = 0
[pid 1366] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1364] <... futex resumed>) = 0
[pid 1364] exit_group(0) = ?
[pid 1365] <... futex resumed>) = ?
[pid 1366] +++ exited with 0 +++
[pid 1365] +++ exited with 0 +++
[pid 1364] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1364, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1367
./strace-static-x86_64: Process 1367 attached
[pid 1367] set_robust_list(0x5555560865e0, 24) = 0
[pid 1367] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1367] setpgid(0, 0) = 0
[pid 1367] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1367] write(3, "1000", 4) = 4
[pid 1367] close(3) = 0
[pid 1367] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1367] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1367] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1367] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1368 attached
, parent_tid=[1368], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1368
[pid 1368] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1367] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1368] <... set_robust_list resumed>) = 0
[pid 1367] <... futex resumed>) = 0
[pid 1367] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1368] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1368] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1367] <... futex resumed>) = 0
[pid 1368] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1367] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1368] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1367] <... futex resumed>) = 0
[pid 1367] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1368] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1368] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1367] <... futex resumed>) = 0
[pid 1368] <... futex resumed>) = 1
[pid 1367] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1368] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1367] <... futex resumed>) = 0
[pid 1367] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1368] <... mount resumed>) = 0
[pid 1368] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1367] <... futex resumed>) = 0
[pid 1368] <... futex resumed>) = 1
[pid 1367] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1368] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1367] <... futex resumed>) = 0
[pid 1367] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1368] <... umount2 resumed>) = 0
[pid 1367] <... futex resumed>) = 0
[pid 1368] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1367] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1368] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1367] <... mmap resumed>) = 0x7f236e446000
[pid 1367] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1367] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1369 attached
, parent_tid=[1369], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1369
[pid 1369] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1367] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1369] <... set_robust_list resumed>) = 0
[pid 1367] <... futex resumed>) = 0
[pid 1369] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1367] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1369] <... umount2 resumed>) = 0
[pid 1369] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1369] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1367] <... futex resumed>) = 0
[pid 1367] exit_group(0) = ?
[pid 1369] <... futex resumed>) = ?
[pid 1369] +++ exited with 0 +++
[pid 1368] <... futex resumed>) = ?
[pid 1368] +++ exited with 0 +++
[pid 1367] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1367, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1370
./strace-static-x86_64: Process 1370 attached
[pid 1370] set_robust_list(0x5555560865e0, 24) = 0
[pid 1370] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1370] setpgid(0, 0) = 0
[pid 1370] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1370] write(3, "1000", 4) = 4
[pid 1370] close(3) = 0
[pid 1370] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1370] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1370] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1370] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1371], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1371
[pid 1370] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1370] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1371 attached
<unfinished ...>
[pid 1371] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1371] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1371] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1370] <... futex resumed>) = 0
[pid 1370] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1370] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1371] <... futex resumed>) = 1
[pid 1371] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1371] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1370] <... futex resumed>) = 0
[pid 1371] <... futex resumed>) = 1
[pid 1370] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1371] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1370] <... futex resumed>) = 0
[pid 1370] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1371] <... mount resumed>) = 0
[pid 1371] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1370] <... futex resumed>) = 0
[pid 1371] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1370] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1371] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1370] <... futex resumed>) = 0
[pid 1371] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1370] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1370] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1370] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1370] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1371] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 1372 attached
[pid 1371] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1370] <... clone resumed>, parent_tid=[1372], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1372
[pid 1372] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1371] <... futex resumed>) = 0
[pid 1370] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1372] <... set_robust_list resumed>) = 0
[pid 1371] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1370] <... futex resumed>) = 0
[pid 1372] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1370] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1372] <... umount2 resumed>) = 0
[pid 1372] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1370] <... futex resumed>) = 0
[pid 1372] <... futex resumed>) = 1
[pid 1370] exit_group(0 <unfinished ...>
[pid 1372] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1370] <... exit_group resumed>) = ?
[pid 1371] <... futex resumed>) = ?
[pid 1371] +++ exited with 0 +++
[pid 1372] <... futex resumed>) = ?
[pid 1372] +++ exited with 0 +++
[pid 1370] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1370, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1373
./strace-static-x86_64: Process 1373 attached
[pid 1373] set_robust_list(0x5555560865e0, 24) = 0
[pid 1373] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1373] setpgid(0, 0) = 0
[pid 1373] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1373] write(3, "1000", 4) = 4
[pid 1373] close(3) = 0
[pid 1373] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1373] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1373] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1373] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1374 attached
<unfinished ...>
[pid 1374] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1373] <... clone resumed>, parent_tid=[1374], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1374
[pid 1374] <... set_robust_list resumed>) = 0
[pid 1374] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1373] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1374] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1374] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1374] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1374] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL) = 0
[pid 1374] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1373] <... futex resumed>) = 1
[pid 1373] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1373] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1374] <... futex resumed>) = 0
[pid 1374] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1374] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1374] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1373] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1373] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1373] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1374] <... futex resumed>) = 0
[pid 1374] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1374] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1373] <... futex resumed>) = 0
[pid 1373] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1373] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1373] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1374] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1373] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1373] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1374] <... umount2 resumed>) = 0
[pid 1373] <... clone resumed>, parent_tid=[1375], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1375
[pid 1374] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1373] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1373] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1375 attached
<unfinished ...>
[pid 1374] <... futex resumed>) = 0
[pid 1375] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1374] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1375] <... set_robust_list resumed>) = 0
[pid 1375] umount2("./file0", MNT_DETACH) = 0
[pid 1375] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1373] <... futex resumed>) = 0
[pid 1373] exit_group(0 <unfinished ...>
[pid 1375] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 (errno 18446744073709551414)
[pid 1373] <... exit_group resumed>) = ?
[pid 1375] +++ exited with 0 +++
[pid 1374] <... futex resumed>) = ?
[pid 1374] +++ exited with 0 +++
[pid 1373] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1373, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1376
./strace-static-x86_64: Process 1376 attached
[pid 1376] set_robust_list(0x5555560865e0, 24) = 0
[pid 1376] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1376] setpgid(0, 0) = 0
[pid 1376] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1376] write(3, "1000", 4) = 4
[pid 1376] close(3) = 0
[pid 1376] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1376] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1376] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1376] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1377 attached
<unfinished ...>
[pid 1377] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1376] <... clone resumed>, parent_tid=[1377], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1377
[pid 1377] <... set_robust_list resumed>) = 0
[pid 1377] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1376] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1377] <... futex resumed>) = 0
[pid 1376] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1377] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1377] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1377] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1376] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1376] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1377] <... futex resumed>) = 0
[pid 1377] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1376] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1377] <... mount resumed>) = 0
[pid 1377] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1377] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1376] <... futex resumed>) = 0
[pid 1376] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1377] <... futex resumed>) = 0
[pid 1376] <... futex resumed>) = 1
[pid 1377] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1376] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1377] <... mount resumed>) = 0
[pid 1377] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1376] <... futex resumed>) = 0
[pid 1377] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1376] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1376] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1376] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1376] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1377] <... umount2 resumed>) = 0
[pid 1377] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1376] <... mprotect resumed>) = 0
[pid 1377] <... futex resumed>) = 0
[pid 1377] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1376] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1378], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1378
./strace-static-x86_64: Process 1378 attached
[pid 1376] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1378] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1376] <... futex resumed>) = 0
[pid 1378] <... set_robust_list resumed>) = 0
[pid 1376] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1378] umount2("./file0", MNT_DETACH) = 0
[pid 1378] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1376] <... futex resumed>) = 0
[pid 1378] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1376] exit_group(0) = ?
[pid 1377] <... futex resumed>) = ?
[pid 1377] +++ exited with 0 +++
[pid 1378] <... futex resumed>) = ?
[pid 1378] +++ exited with 0 +++
[pid 1376] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1376, si_uid=0, si_status=0, si_utime=0, si_stime=1} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1379
./strace-static-x86_64: Process 1379 attached
[pid 1379] set_robust_list(0x5555560865e0, 24) = 0
[pid 1379] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1379] setpgid(0, 0) = 0
[pid 1379] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1379] write(3, "1000", 4) = 4
[pid 1379] close(3) = 0
[pid 1379] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1379] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1379] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1379] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1380], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1380
[pid 1379] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1379] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1380 attached
<unfinished ...>
[pid 1380] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1380] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1380] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1379] <... futex resumed>) = 0
[pid 1379] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1379] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1380] <... futex resumed>) = 1
[pid 1380] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1380] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1379] <... futex resumed>) = 0
[pid 1380] <... futex resumed>) = 1
[pid 1379] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1380] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1379] <... futex resumed>) = 0
[pid 1379] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1380] <... mount resumed>) = 0
[pid 1380] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1379] <... futex resumed>) = 0
[pid 1380] <... futex resumed>) = 1
[pid 1379] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1380] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1379] <... futex resumed>) = 0
[pid 1379] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1379] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1379] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1380] <... umount2 resumed>) = 0
[pid 1379] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1380] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 1381 attached
[pid 1380] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1379] <... clone resumed>, parent_tid=[1381], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1381
[pid 1381] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1379] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1381] <... set_robust_list resumed>) = 0
[pid 1379] <... futex resumed>) = 0
[pid 1381] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1379] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1381] <... umount2 resumed>) = 0
[pid 1381] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1379] <... futex resumed>) = 0
[pid 1381] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1379] exit_group(0) = ?
[pid 1380] <... futex resumed>) = 231
[pid 1381] <... futex resumed>) = ?
[pid 1380] +++ exited with 0 +++
[pid 1381] +++ exited with 0 +++
[pid 1379] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1379, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1382
./strace-static-x86_64: Process 1382 attached
[pid 1382] set_robust_list(0x5555560865e0, 24) = 0
[pid 1382] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1382] setpgid(0, 0) = 0
[pid 1382] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1382] write(3, "1000", 4) = 4
[pid 1382] close(3) = 0
[pid 1382] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1382] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1382] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1382] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1383], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1383
./strace-static-x86_64: Process 1383 attached
[pid 1383] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1383] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1382] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1383] <... futex resumed>) = 0
[pid 1383] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1382] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1383] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1383] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1382] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1382] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1383] <... futex resumed>) = 0
[pid 1383] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1382] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1383] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1382] <... futex resumed>) = 0
[pid 1382] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1382] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1383] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1383] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1382] <... futex resumed>) = 0
[pid 1382] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1382] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1382] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1382] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1382] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1384 attached
, parent_tid=[1384], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1384
[pid 1382] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1382] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1383] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1384] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1384] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1383] <... umount2 resumed>) = 0
[pid 1383] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1383] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1384] <... umount2 resumed>) = 0
[pid 1384] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1382] <... futex resumed>) = 0
[pid 1384] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1382] exit_group(0) = ?
[pid 1383] <... futex resumed>) = ?
[pid 1384] <... futex resumed>) = ?
[pid 1383] +++ exited with 0 +++
[pid 1384] +++ exited with 0 +++
[pid 1382] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1382, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1385
./strace-static-x86_64: Process 1385 attached
[pid 1385] set_robust_list(0x5555560865e0, 24) = 0
[pid 1385] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1385] setpgid(0, 0) = 0
[pid 1385] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1385] write(3, "1000", 4) = 4
[pid 1385] close(3) = 0
[pid 1385] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1385] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1385] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1385] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1386 attached
<unfinished ...>
[pid 1386] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1386] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1385] <... clone resumed>, parent_tid=[1386], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1386
[pid 1385] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1386] <... futex resumed>) = 0
[pid 1386] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1386] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1386] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1385] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1385] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1386] <... futex resumed>) = 0
[pid 1386] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1385] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1386] <... mount resumed>) = 0
[pid 1386] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1386] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1385] <... futex resumed>) = 0
[pid 1385] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1386] <... futex resumed>) = 0
[pid 1386] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1385] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1386] <... mount resumed>) = 0
[pid 1386] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1385] <... futex resumed>) = 0
[pid 1385] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1385] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1385] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1386] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1385] <... mmap resumed>) = 0x7f236e446000
[pid 1385] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1385] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1386] <... umount2 resumed>) = 0
[pid 1385] <... clone resumed>, parent_tid=[1387], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1387
[pid 1386] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1385] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1385] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1386] <... futex resumed>) = 0
./strace-static-x86_64: Process 1387 attached
[pid 1386] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1387] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1387] umount2("./file0", MNT_DETACH) = 0
[pid 1387] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1385] <... futex resumed>) = 0
[pid 1385] exit_group(0) = ?
[pid 1386] <... futex resumed>) = ?
[pid 1387] <... futex resumed>) = ?
[pid 1387] +++ exited with 0 +++
[pid 1386] +++ exited with 0 +++
[pid 1385] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1385, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1388
./strace-static-x86_64: Process 1388 attached
[pid 1388] set_robust_list(0x5555560865e0, 24) = 0
[pid 1388] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1388] setpgid(0, 0) = 0
[pid 1388] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1388] write(3, "1000", 4) = 4
[pid 1388] close(3) = 0
[pid 1388] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1388] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1388] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1388] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1389 attached
, parent_tid=[1389], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1389
[pid 1389] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1389] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1388] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1389] <... futex resumed>) = 0
[pid 1389] mkdir("./file0", 000 <unfinished ...>
[pid 1388] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1389] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1389] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1389] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1388] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1388] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1389] <... futex resumed>) = 0
[pid 1388] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1389] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1389] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1388] <... futex resumed>) = 0
[pid 1388] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1388] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1389] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1389] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1388] <... futex resumed>) = 0
[pid 1388] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1388] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1388] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1388] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1388] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1390], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1390
[pid 1389] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1388] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1388] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1390 attached
<unfinished ...>
[pid 1390] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1390] umount2("./file0", MNT_DETACH) = 0
[pid 1390] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1389] <... umount2 resumed>) = 0
[pid 1389] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1388] <... futex resumed>) = 0
[pid 1388] exit_group(0) = ?
[pid 1390] <... futex resumed>) = ?
[pid 1389] <... futex resumed>) = ?
[pid 1390] +++ exited with 0 +++
[pid 1389] +++ exited with 0 +++
[pid 1388] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1388, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1391
./strace-static-x86_64: Process 1391 attached
[pid 1391] set_robust_list(0x5555560865e0, 24) = 0
[pid 1391] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1391] setpgid(0, 0) = 0
[pid 1391] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1391] write(3, "1000", 4) = 4
[pid 1391] close(3) = 0
[pid 1391] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1391] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1391] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1391] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1392], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1392
[pid 1391] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1391] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1392 attached
<unfinished ...>
[pid 1392] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1392] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1392] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1391] <... futex resumed>) = 0
[pid 1391] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1391] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1392] <... futex resumed>) = 1
[pid 1392] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1392] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1391] <... futex resumed>) = 0
[pid 1391] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1391] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1392] <... futex resumed>) = 1
[pid 1392] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1392] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1391] <... futex resumed>) = 0
[pid 1391] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1391] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1391] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1391] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1391] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1393], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1393
[pid 1391] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1391] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1392] <... futex resumed>) = 1
[pid 1392] umount2("./file0", MNT_DETACH) = 0
[pid 1392] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1392] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1393 attached
<unfinished ...>
[pid 1393] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1393] umount2("./file0", MNT_DETACH) = 0
[pid 1393] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1391] <... futex resumed>) = 0
[pid 1391] exit_group(0) = ?
[pid 1392] <... futex resumed>) = ?
[pid 1392] +++ exited with 0 +++
[pid 1393] <... futex resumed>) = ?
[pid 1393] +++ exited with 0 +++
[pid 1391] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1391, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1394 attached
, child_tidptr=0x5555560865d0) = 1394
[pid 1394] set_robust_list(0x5555560865e0, 24) = 0
[pid 1394] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1394] setpgid(0, 0) = 0
[pid 1394] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1394] write(3, "1000", 4) = 4
[pid 1394] close(3) = 0
[pid 1394] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1394] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1394] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1394] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1395], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1395
[pid 1394] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1394] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1395 attached
<unfinished ...>
[pid 1395] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1395] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1395] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1394] <... futex resumed>) = 0
[pid 1394] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1394] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1395] <... futex resumed>) = 1
[pid 1395] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1395] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1394] <... futex resumed>) = 0
[pid 1394] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1394] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1395] <... futex resumed>) = 1
[pid 1395] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1395] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1394] <... futex resumed>) = 0
[pid 1394] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1394] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1394] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1394] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1394] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1396], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1396
[pid 1394] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1394] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1395] <... futex resumed>) = 1
[pid 1395] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 1396 attached
) = 0
[pid 1395] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1395] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1396] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1396] umount2("./file0", MNT_DETACH) = 0
[pid 1396] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1394] <... futex resumed>) = 0
[pid 1394] exit_group(0) = ?
[pid 1395] <... futex resumed>) = ?
[pid 1395] +++ exited with 0 +++
[pid 1396] <... futex resumed>) = ?
[pid 1396] +++ exited with 0 +++
[pid 1394] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1394, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1397
./strace-static-x86_64: Process 1397 attached
[pid 1397] set_robust_list(0x5555560865e0, 24) = 0
[pid 1397] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1397] setpgid(0, 0) = 0
[pid 1397] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1397] write(3, "1000", 4) = 4
[pid 1397] close(3) = 0
[pid 1397] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1397] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1397] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1397] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1398 attached
, parent_tid=[1398], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1398
[pid 1398] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1397] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1398] <... set_robust_list resumed>) = 0
[pid 1397] <... futex resumed>) = 0
[pid 1397] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1398] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1398] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1397] <... futex resumed>) = 0
[pid 1398] <... futex resumed>) = 1
[pid 1397] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1398] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1397] <... futex resumed>) = 0
[pid 1397] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1398] <... mount resumed>) = 0
[pid 1398] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1397] <... futex resumed>) = 0
[pid 1398] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1397] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1398] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1397] <... futex resumed>) = 0
[pid 1397] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1398] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1398] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1397] <... futex resumed>) = 0
[pid 1398] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1397] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1397] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1397] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1397] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1397] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1398] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 1399 attached
[pid 1399] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1398] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1399] <... set_robust_list resumed>) = 0
[pid 1398] <... futex resumed>) = 0
[pid 1397] <... clone resumed>, parent_tid=[1399], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1399
[pid 1399] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1398] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1397] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1397] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1399] <... umount2 resumed>) = 0
[pid 1399] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1397] <... futex resumed>) = 0
[pid 1399] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1397] exit_group(0) = ?
[pid 1398] <... futex resumed>) = ?
[pid 1399] <... futex resumed>) = ?
[pid 1398] +++ exited with 0 +++
[pid 1399] +++ exited with 0 +++
[pid 1397] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1397, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1400
./strace-static-x86_64: Process 1400 attached
[pid 1400] set_robust_list(0x5555560865e0, 24) = 0
[pid 1400] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1400] setpgid(0, 0) = 0
[pid 1400] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1400] write(3, "1000", 4) = 4
[pid 1400] close(3) = 0
[pid 1400] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1400] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1400] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1400] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1401 attached
, parent_tid=[1401], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1401
[pid 1401] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1400] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1401] <... set_robust_list resumed>) = 0
[pid 1400] <... futex resumed>) = 0
[pid 1400] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1401] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1401] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1400] <... futex resumed>) = 0
[pid 1401] <... futex resumed>) = 1
[pid 1400] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1401] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1400] <... futex resumed>) = 0
[pid 1400] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1401] <... mount resumed>) = 0
[pid 1401] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1400] <... futex resumed>) = 0
[pid 1401] <... futex resumed>) = 1
[pid 1400] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1401] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1400] <... futex resumed>) = 0
[pid 1400] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1401] <... mount resumed>) = 0
[pid 1401] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1400] <... futex resumed>) = 0
[pid 1401] <... futex resumed>) = 1
[pid 1400] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1401] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1400] <... futex resumed>) = 0
[pid 1400] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1400] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1400] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1400] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1401] <... umount2 resumed>) = 0
[pid 1401] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1401] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1400] <... clone resumed>, parent_tid=[1402], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1402
[pid 1400] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1402 attached
) = 0
[pid 1402] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1400] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1402] <... set_robust_list resumed>) = 0
[pid 1402] umount2("./file0", MNT_DETACH) = 0
[pid 1402] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1400] <... futex resumed>) = 0
[pid 1402] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1400] exit_group(0) = ?
[pid 1401] <... futex resumed>) = ?
[pid 1401] +++ exited with 0 +++
[pid 1402] <... futex resumed>) = ?
[pid 1402] +++ exited with 0 +++
[pid 1400] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1400, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1403
./strace-static-x86_64: Process 1403 attached
[pid 1403] set_robust_list(0x5555560865e0, 24) = 0
[pid 1403] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1403] setpgid(0, 0) = 0
[pid 1403] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1403] write(3, "1000", 4) = 4
[pid 1403] close(3) = 0
[pid 1403] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1403] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1403] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1403] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1404], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1404
[pid 1403] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1403] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1404 attached
<unfinished ...>
[pid 1404] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1404] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1404] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1403] <... futex resumed>) = 0
[pid 1403] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1403] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1404] <... futex resumed>) = 1
[pid 1404] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1404] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1403] <... futex resumed>) = 0
[pid 1403] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1403] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1404] <... futex resumed>) = 1
[pid 1404] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1404] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1403] <... futex resumed>) = 0
[pid 1403] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1403] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1403] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1403] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1403] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1405], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1405
[pid 1403] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1403] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1404] <... futex resumed>) = 1
[pid 1404] umount2("./file0", MNT_DETACH) = 0
[pid 1404] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1404] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1405 attached
<unfinished ...>
[pid 1405] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1405] umount2("./file0", MNT_DETACH) = 0
[pid 1405] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1403] <... futex resumed>) = 0
[pid 1403] exit_group(0) = ?
[pid 1404] <... futex resumed>) = ?
[pid 1404] +++ exited with 0 +++
[pid 1405] <... futex resumed>) = ?
[pid 1405] +++ exited with 0 +++
[pid 1403] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1403, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1406
./strace-static-x86_64: Process 1406 attached
[pid 1406] set_robust_list(0x5555560865e0, 24) = 0
[pid 1406] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1406] setpgid(0, 0) = 0
[pid 1406] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1406] write(3, "1000", 4) = 4
[pid 1406] close(3) = 0
[pid 1406] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1406] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1406] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1406] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1407], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1407
[pid 1406] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1406] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1407 attached
<unfinished ...>
[pid 1407] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1407] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1407] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1406] <... futex resumed>) = 0
[pid 1406] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1406] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1407] <... futex resumed>) = 1
[pid 1407] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1407] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1406] <... futex resumed>) = 0
[pid 1406] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1406] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1407] <... futex resumed>) = 1
[pid 1407] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1407] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1406] <... futex resumed>) = 0
[pid 1406] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1406] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1406] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1406] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1406] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1407] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1406] <... clone resumed>, parent_tid=[1408], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1408
[pid 1406] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1407] <... umount2 resumed>) = 0
[pid 1406] <... futex resumed>) = 0
[pid 1406] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1408 attached
<unfinished ...>
[pid 1407] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1408] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1407] <... futex resumed>) = 0
[pid 1408] <... set_robust_list resumed>) = 0
[pid 1407] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1408] umount2("./file0", MNT_DETACH) = 0
[pid 1408] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1406] <... futex resumed>) = 0
[pid 1406] exit_group(0 <unfinished ...>
[pid 1408] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1406] <... exit_group resumed>) = ?
[pid 1408] <... futex resumed>) = ?
[pid 1407] <... futex resumed>) = ?
[pid 1407] +++ exited with 0 +++
[pid 1408] +++ exited with 0 +++
[pid 1406] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1406, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1409 attached
, child_tidptr=0x5555560865d0) = 1409
[pid 1409] set_robust_list(0x5555560865e0, 24) = 0
[pid 1409] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1409] setpgid(0, 0) = 0
[pid 1409] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1409] write(3, "1000", 4) = 4
[pid 1409] close(3) = 0
[pid 1409] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1409] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1409] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1409] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1410 attached
<unfinished ...>
[pid 1410] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1409] <... clone resumed>, parent_tid=[1410], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1410
[pid 1410] <... set_robust_list resumed>) = 0
[pid 1410] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1409] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1410] <... futex resumed>) = 0
[pid 1410] mkdir("./file0", 000 <unfinished ...>
[pid 1409] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1410] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1410] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1409] <... futex resumed>) = 0
[pid 1409] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1409] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1410] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1410] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1409] <... futex resumed>) = 0
[pid 1409] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1409] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1410] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1410] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1409] <... futex resumed>) = 0
[pid 1409] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1409] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1409] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1409] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1409] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1410] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 1411 attached
<unfinished ...>
[pid 1411] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1411] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1409] <... clone resumed>, parent_tid=[1411], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1411
[pid 1409] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1410] <... umount2 resumed>) = 0
[pid 1410] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1409] <... futex resumed>) = 1
[pid 1411] <... futex resumed>) = 0
[pid 1411] umount2("./file0", MNT_DETACH) = 0
[pid 1410] <... futex resumed>) = 0
[pid 1409] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1411] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1411] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1410] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1409] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1409] exit_group(0) = ?
[pid 1411] <... futex resumed>) = ?
[pid 1410] <... futex resumed>) = ?
[pid 1411] +++ exited with 0 +++
[pid 1410] +++ exited with 0 +++
[pid 1409] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1409, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1412
./strace-static-x86_64: Process 1412 attached
[pid 1412] set_robust_list(0x5555560865e0, 24) = 0
[pid 1412] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1412] setpgid(0, 0) = 0
[pid 1412] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1412] write(3, "1000", 4) = 4
[pid 1412] close(3) = 0
[pid 1412] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1412] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1412] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1412] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1413], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1413
[pid 1412] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1412] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1413 attached
<unfinished ...>
[pid 1413] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1413] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1413] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1412] <... futex resumed>) = 0
[pid 1412] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1412] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1413] <... futex resumed>) = 1
[pid 1413] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1413] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1412] <... futex resumed>) = 0
[pid 1412] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1412] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1413] <... futex resumed>) = 1
[pid 1413] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1413] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1412] <... futex resumed>) = 0
[pid 1412] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1412] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1412] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1412] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1412] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1414], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1414
[pid 1412] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1412] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1413] <... futex resumed>) = 1
[pid 1413] umount2("./file0", MNT_DETACH) = 0
[pid 1413] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1413] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1414 attached
<unfinished ...>
[pid 1414] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1414] umount2("./file0", MNT_DETACH) = 0
[pid 1414] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1412] <... futex resumed>) = 0
[pid 1412] exit_group(0) = ?
[pid 1413] <... futex resumed>) = ?
[pid 1414] <... futex resumed>) = ?
[pid 1413] +++ exited with 0 +++
[pid 1414] +++ exited with 0 +++
[pid 1412] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1412, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1415
./strace-static-x86_64: Process 1415 attached
[pid 1415] set_robust_list(0x5555560865e0, 24) = 0
[pid 1415] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1415] setpgid(0, 0) = 0
[pid 1415] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1415] write(3, "1000", 4) = 4
[pid 1415] close(3) = 0
[pid 1415] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1415] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1415] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1415] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1416 attached
<unfinished ...>
[pid 1416] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1416] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1415] <... clone resumed>, parent_tid=[1416], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1416
[pid 1415] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1416] <... futex resumed>) = 0
[pid 1415] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1416] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1416] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1415] <... futex resumed>) = 0
[pid 1415] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1415] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1416] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1416] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1415] <... futex resumed>) = 0
[pid 1415] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1415] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1416] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1416] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1415] <... futex resumed>) = 0
[pid 1415] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1415] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1415] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1415] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1415] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1417], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1417
[pid 1415] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1415] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1416] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 1417 attached
) = 0
[pid 1417] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1416] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1416] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1417] <... set_robust_list resumed>) = 0
[pid 1417] umount2("./file0", MNT_DETACH) = 0
[pid 1417] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1415] <... futex resumed>) = 0
[pid 1415] exit_group(0 <unfinished ...>
[pid 1417] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1415] <... exit_group resumed>) = ?
[pid 1416] <... futex resumed>) = ?
[pid 1416] +++ exited with 0 +++
[pid 1417] <... futex resumed>) = ?
[pid 1417] +++ exited with 0 +++
[pid 1415] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1415, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1418
./strace-static-x86_64: Process 1418 attached
[pid 1418] set_robust_list(0x5555560865e0, 24) = 0
[pid 1418] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1418] setpgid(0, 0) = 0
[pid 1418] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1418] write(3, "1000", 4) = 4
[pid 1418] close(3) = 0
[pid 1418] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1418] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1418] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1418] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1419 attached
, parent_tid=[1419], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1419
[pid 1419] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1418] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1419] <... set_robust_list resumed>) = 0
[pid 1418] <... futex resumed>) = 0
[pid 1418] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1419] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1419] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1418] <... futex resumed>) = 0
[pid 1419] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1418] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1418] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1419] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1419] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1419] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1418] <... futex resumed>) = 0
[pid 1419] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1418] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1418] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1419] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1419] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1419] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1418] <... futex resumed>) = 0
[pid 1418] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1418] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1419] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1418] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1418] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1418] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1419] <... umount2 resumed>) = 0
[pid 1418] <... clone resumed>, parent_tid=[1420], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1420
[pid 1418] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1418] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1420 attached
<unfinished ...>
[pid 1420] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1420] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1419] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1419] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1420] <... umount2 resumed>) = 0
[pid 1420] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1418] <... futex resumed>) = 0
[pid 1418] exit_group(0) = ?
[pid 1419] <... futex resumed>) = ?
[pid 1419] +++ exited with 0 +++
[pid 1420] <... futex resumed>) = ?
[pid 1420] +++ exited with 0 +++
[pid 1418] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1418, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1421
./strace-static-x86_64: Process 1421 attached
[pid 1421] set_robust_list(0x5555560865e0, 24) = 0
[pid 1421] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1421] setpgid(0, 0) = 0
[pid 1421] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1421] write(3, "1000", 4) = 4
[pid 1421] close(3) = 0
[pid 1421] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1421] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1421] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1421] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1422 attached
, parent_tid=[1422], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1422
[pid 1422] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1421] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1422] <... set_robust_list resumed>) = 0
[pid 1421] <... futex resumed>) = 0
[pid 1421] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1422] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1422] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1421] <... futex resumed>) = 0
[pid 1422] <... futex resumed>) = 1
[pid 1421] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1422] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1421] <... futex resumed>) = 0
[pid 1421] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1422] <... mount resumed>) = 0
[pid 1422] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1421] <... futex resumed>) = 0
[pid 1422] <... futex resumed>) = 1
[pid 1421] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1422] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1421] <... futex resumed>) = 0
[pid 1421] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1422] <... mount resumed>) = 0
[pid 1422] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1421] <... futex resumed>) = 0
[pid 1421] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1421] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1421] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1421] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1421] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1423], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1423
[pid 1422] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1421] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1421] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1423 attached
<unfinished ...>
[pid 1423] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1423] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1422] <... umount2 resumed>) = 0
[pid 1423] <... umount2 resumed>) = 0
[pid 1423] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1421] <... futex resumed>) = 0
[pid 1423] <... futex resumed>) = 1
[pid 1423] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1422] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1422] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1421] exit_group(0) = ?
[pid 1423] <... futex resumed>) = ?
[pid 1423] +++ exited with 0 +++
[pid 1422] <... futex resumed>) = ?
[pid 1422] +++ exited with 0 +++
[pid 1421] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1421, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1424
./strace-static-x86_64: Process 1424 attached
[pid 1424] set_robust_list(0x5555560865e0, 24) = 0
[pid 1424] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1424] setpgid(0, 0) = 0
[pid 1424] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1424] write(3, "1000", 4) = 4
[pid 1424] close(3) = 0
[pid 1424] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1424] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1424] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1424] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1425], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1425
[pid 1424] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1424] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1425 attached
<unfinished ...>
[pid 1425] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1425] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1425] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1424] <... futex resumed>) = 0
[pid 1424] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1424] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1425] <... futex resumed>) = 1
[pid 1425] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1425] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1424] <... futex resumed>) = 0
[pid 1424] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1424] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1425] <... futex resumed>) = 1
[pid 1425] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1425] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1424] <... futex resumed>) = 0
[pid 1424] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1424] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1424] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1424] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1424] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1426], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1426
[pid 1424] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1424] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1425] <... futex resumed>) = 1
[pid 1425] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 1426 attached
) = 0
[pid 1426] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1425] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1426] <... set_robust_list resumed>) = 0
[pid 1425] <... futex resumed>) = 0
[pid 1426] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1425] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1426] <... umount2 resumed>) = 0
[pid 1426] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1424] <... futex resumed>) = 0
[pid 1426] <... futex resumed>) = 1
[pid 1424] exit_group(0 <unfinished ...>
[pid 1426] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1424] <... exit_group resumed>) = ?
[pid 1425] <... futex resumed>) = ?
[pid 1425] +++ exited with 0 +++
[pid 1426] <... futex resumed>) = ?
[pid 1426] +++ exited with 0 +++
[pid 1424] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1424, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1427
./strace-static-x86_64: Process 1427 attached
[pid 1427] set_robust_list(0x5555560865e0, 24) = 0
[pid 1427] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1427] setpgid(0, 0) = 0
[pid 1427] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1427] write(3, "1000", 4) = 4
[pid 1427] close(3) = 0
[pid 1427] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1427] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1427] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1427] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1428 attached
, parent_tid=[1428], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1428
[pid 1428] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1428] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1427] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1428] <... futex resumed>) = 0
[pid 1428] mkdir("./file0", 000 <unfinished ...>
[pid 1427] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1428] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1428] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1427] <... futex resumed>) = 0
[pid 1427] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1427] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1428] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1428] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1427] <... futex resumed>) = 0
[pid 1428] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1427] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1428] <... mount resumed>) = 0
[pid 1427] <... futex resumed>) = 0
[pid 1427] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1428] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1427] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1427] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1428] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1427] <... futex resumed>) = 0
[pid 1427] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1427] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1428] <... umount2 resumed>) = 0
[pid 1428] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1427] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1428] <... futex resumed>) = 0
[pid 1427] <... mprotect resumed>) = 0
[pid 1427] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1428] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1429 attached
<unfinished ...>
[pid 1427] <... clone resumed>, parent_tid=[1429], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1429
[pid 1429] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1429] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1427] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1429] <... futex resumed>) = 0
[pid 1429] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1427] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1429] <... umount2 resumed>) = 0
[pid 1429] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1429] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1427] <... futex resumed>) = 0
[pid 1427] exit_group(0 <unfinished ...>
[pid 1428] <... futex resumed>) = 231
[pid 1427] <... exit_group resumed>) = ?
[pid 1429] <... futex resumed>) = ?
[pid 1429] +++ exited with 0 +++
[pid 1428] +++ exited with 0 +++
[pid 1427] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1427, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1430 attached
, child_tidptr=0x5555560865d0) = 1430
[pid 1430] set_robust_list(0x5555560865e0, 24) = 0
[pid 1430] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1430] setpgid(0, 0) = 0
[pid 1430] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1430] write(3, "1000", 4) = 4
[pid 1430] close(3) = 0
[pid 1430] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1430] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1430] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1430] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1431 attached
<unfinished ...>
[pid 1431] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1430] <... clone resumed>, parent_tid=[1431], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1431
[pid 1431] <... set_robust_list resumed>) = 0
[pid 1430] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1431] mkdir("./file0", 000 <unfinished ...>
[pid 1430] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1431] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1431] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1430] <... futex resumed>) = 0
[pid 1431] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1430] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1431] <... mount resumed>) = 0
[pid 1430] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1431] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1430] <... futex resumed>) = 0
[pid 1431] <... futex resumed>) = 1
[pid 1431] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1430] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1430] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1431] <... mount resumed>) = 0
[pid 1431] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1430] <... futex resumed>) = 0
[pid 1430] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1430] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1430] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1430] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1430] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1432], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1432
[pid 1430] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1430] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1431] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 1432 attached
) = 0
[pid 1431] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1431] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1432] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1432] umount2("./file0", MNT_DETACH) = 0
[pid 1432] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1430] <... futex resumed>) = 0
[pid 1432] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1430] exit_group(0 <unfinished ...>
[pid 1432] <... futex resumed>) = -1 (errno 18446744073709551555)
[pid 1430] <... exit_group resumed>) = ?
[pid 1431] <... futex resumed>) = ?
[pid 1431] +++ exited with 0 +++
[pid 1432] +++ exited with 0 +++
[pid 1430] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1430, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1433
./strace-static-x86_64: Process 1433 attached
[pid 1433] set_robust_list(0x5555560865e0, 24) = 0
[pid 1433] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1433] setpgid(0, 0) = 0
[pid 1433] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1433] write(3, "1000", 4) = 4
[pid 1433] close(3) = 0
[pid 1433] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1433] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1433] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1433] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1434 attached
<unfinished ...>
[pid 1434] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1434] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1433] <... clone resumed>, parent_tid=[1434], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1434
[pid 1433] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1434] <... futex resumed>) = 0
[pid 1434] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1434] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1434] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1433] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1433] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1434] <... futex resumed>) = 0
[pid 1434] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1434] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1434] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1433] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1433] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1434] <... futex resumed>) = 0
[pid 1434] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1433] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1434] <... mount resumed>) = 0
[pid 1434] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1434] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1433] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1433] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1434] <... futex resumed>) = 0
[pid 1434] umount2("./file0", MNT_DETACH) = 0
[pid 1434] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1434] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1433] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1434] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1433] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1434] umount2("./file0", MNT_DETACH) = 0
[pid 1434] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1434] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1433] <... futex resumed>) = 0
[pid 1433] exit_group(0) = ?
[pid 1434] <... futex resumed>) = ?
[pid 1434] +++ exited with 0 +++
[pid 1433] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1433, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1435
./strace-static-x86_64: Process 1435 attached
[pid 1435] set_robust_list(0x5555560865e0, 24) = 0
[pid 1435] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1435] setpgid(0, 0) = 0
[pid 1435] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1435] write(3, "1000", 4) = 4
[pid 1435] close(3) = 0
[pid 1435] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1435] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1435] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1435] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1436 attached
, parent_tid=[1436], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1436
[pid 1436] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1435] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1436] <... set_robust_list resumed>) = 0
[pid 1435] <... futex resumed>) = 0
[pid 1435] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1436] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1436] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1435] <... futex resumed>) = 0
[pid 1436] <... futex resumed>) = 1
[pid 1435] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1436] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1435] <... futex resumed>) = 0
[pid 1435] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1436] <... mount resumed>) = 0
[pid 1436] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1435] <... futex resumed>) = 0
[pid 1435] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1435] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1436] <... futex resumed>) = 1
[pid 1436] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1436] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1435] <... futex resumed>) = 0
[pid 1436] <... futex resumed>) = 1
[pid 1435] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1436] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1435] <... futex resumed>) = 0
[pid 1435] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1435] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1435] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1436] <... umount2 resumed>) = 0
[pid 1435] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1436] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1437 attached
) = 0
[pid 1437] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1436] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1435] <... clone resumed>, parent_tid=[1437], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1437
[pid 1437] <... set_robust_list resumed>) = 0
[pid 1435] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1437] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1435] <... futex resumed>) = 0
[pid 1435] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1437] <... umount2 resumed>) = 0
[pid 1437] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1435] <... futex resumed>) = 0
[pid 1437] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1435] exit_group(0) = ?
[pid 1436] <... futex resumed>) = ?
[pid 1437] <... futex resumed>) = ?
[pid 1436] +++ exited with 0 +++
[pid 1437] +++ exited with 0 +++
[pid 1435] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1435, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1438
./strace-static-x86_64: Process 1438 attached
[pid 1438] set_robust_list(0x5555560865e0, 24) = 0
[pid 1438] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1438] setpgid(0, 0) = 0
[pid 1438] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1438] write(3, "1000", 4) = 4
[pid 1438] close(3) = 0
[pid 1438] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1438] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1438] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1438] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1439 attached
, parent_tid=[1439], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1439
[pid 1439] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1438] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1439] <... set_robust_list resumed>) = 0
[pid 1438] <... futex resumed>) = 0
[pid 1438] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1439] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1439] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1438] <... futex resumed>) = 0
[pid 1439] <... futex resumed>) = 1
[pid 1438] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1439] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1438] <... futex resumed>) = 0
[pid 1438] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1439] <... mount resumed>) = 0
[pid 1439] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1438] <... futex resumed>) = 0
[pid 1438] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1439] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1438] <... futex resumed>) = 0
[pid 1438] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1439] <... mount resumed>) = 0
[pid 1439] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1438] <... futex resumed>) = 0
[pid 1439] <... futex resumed>) = 1
[pid 1438] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1439] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1438] <... futex resumed>) = 0
[pid 1438] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1438] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1438] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1438] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1439] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 1440 attached
[pid 1439] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1440] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1439] <... futex resumed>) = 0
[pid 1438] <... clone resumed>, parent_tid=[1440], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1440
[pid 1440] <... set_robust_list resumed>) = 0
[pid 1439] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1438] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1438] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1440] umount2("./file0", MNT_DETACH) = 0
[pid 1440] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1438] <... futex resumed>) = 0
[pid 1440] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1438] exit_group(0) = ?
[pid 1439] <... futex resumed>) = ?
[pid 1440] <... futex resumed>) = ?
[pid 1440] +++ exited with 0 +++
[pid 1439] +++ exited with 0 +++
[pid 1438] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1438, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1441
./strace-static-x86_64: Process 1441 attached
[pid 1441] set_robust_list(0x5555560865e0, 24) = 0
[pid 1441] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1441] setpgid(0, 0) = 0
[pid 1441] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1441] write(3, "1000", 4) = 4
[pid 1441] close(3) = 0
[pid 1441] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1441] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1441] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1441] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1442 attached
<unfinished ...>
[pid 1442] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1442] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1441] <... clone resumed>, parent_tid=[1442], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1442
[pid 1441] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1442] <... futex resumed>) = 0
[pid 1442] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1442] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1441] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1442] <... futex resumed>) = 0
[pid 1441] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1442] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1441] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1442] <... futex resumed>) = 0
[pid 1442] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1441] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1442] <... mount resumed>) = 0
[pid 1442] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1442] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1441] <... futex resumed>) = 0
[pid 1441] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1441] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1442] <... futex resumed>) = 0
[pid 1442] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1442] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1441] <... futex resumed>) = 0
[pid 1442] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1441] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1441] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1441] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1441] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1441] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1442] <... umount2 resumed>) = 0
[pid 1442] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1441] <... clone resumed>, parent_tid=[1443], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1443
[pid 1442] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1441] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1443 attached
) = 0
[pid 1443] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1441] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1443] <... set_robust_list resumed>) = 0
[pid 1443] umount2("./file0", MNT_DETACH) = 0
[pid 1443] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1443] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1441] <... futex resumed>) = 0
[pid 1441] exit_group(0) = ?
[pid 1442] <... futex resumed>) = ?
[pid 1442] +++ exited with 0 +++
[pid 1443] <... futex resumed>) = ?
[pid 1443] +++ exited with 0 +++
[pid 1441] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1441, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1444
./strace-static-x86_64: Process 1444 attached
[pid 1444] set_robust_list(0x5555560865e0, 24) = 0
[pid 1444] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1444] setpgid(0, 0) = 0
[pid 1444] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1444] write(3, "1000", 4) = 4
[pid 1444] close(3) = 0
[pid 1444] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1444] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1444] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1444] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1445], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1445
[pid 1444] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1444] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1445 attached
<unfinished ...>
[pid 1445] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1445] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1445] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1444] <... futex resumed>) = 0
[pid 1444] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1444] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1445] <... futex resumed>) = 1
[pid 1445] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1445] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1444] <... futex resumed>) = 0
[pid 1445] <... futex resumed>) = 1
[pid 1444] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1445] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1444] <... futex resumed>) = 0
[pid 1444] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1445] <... mount resumed>) = 0
[pid 1445] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1444] <... futex resumed>) = 0
[pid 1444] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1444] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1444] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1444] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1444] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1446 attached
, parent_tid=[1446], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1446
[pid 1444] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1444] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1445] <... futex resumed>) = 1
[pid 1446] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1445] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1446] <... set_robust_list resumed>) = 0
[pid 1445] <... umount2 resumed>) = 0
[pid 1445] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1445] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1446] umount2("./file0", MNT_DETACH) = 0
[pid 1446] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1444] <... futex resumed>) = 0
[pid 1444] exit_group(0) = ?
[pid 1445] <... futex resumed>) = ?
[pid 1445] +++ exited with 0 +++
[pid 1446] <... futex resumed>) = ?
[pid 1446] +++ exited with 0 +++
[pid 1444] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1444, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1447
./strace-static-x86_64: Process 1447 attached
[pid 1447] set_robust_list(0x5555560865e0, 24) = 0
[pid 1447] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1447] setpgid(0, 0) = 0
[pid 1447] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1447] write(3, "1000", 4) = 4
[pid 1447] close(3) = 0
[pid 1447] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1447] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1447] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1447] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1448 attached
<unfinished ...>
[pid 1448] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1447] <... clone resumed>, parent_tid=[1448], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1448
[pid 1448] <... set_robust_list resumed>) = 0
[pid 1447] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1448] mkdir("./file0", 000 <unfinished ...>
[pid 1447] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1448] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1448] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1447] <... futex resumed>) = 0
[pid 1448] <... futex resumed>) = 1
[pid 1447] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1448] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1447] <... futex resumed>) = 0
[pid 1447] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1448] <... mount resumed>) = 0
[pid 1448] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1447] <... futex resumed>) = 0
[pid 1447] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1448] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1447] <... futex resumed>) = 0
[pid 1447] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1448] <... mount resumed>) = 0
[pid 1448] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1447] <... futex resumed>) = 0
[pid 1447] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1447] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1447] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1447] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1447] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1449 attached
, parent_tid=[1449], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1449
[pid 1449] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1447] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1449] <... set_robust_list resumed>) = 0
[pid 1447] <... futex resumed>) = 0
[pid 1449] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1447] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1448] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1449] <... umount2 resumed>) = 0
[pid 1448] <... umount2 resumed>) = 0
[pid 1449] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1447] <... futex resumed>) = 0
[pid 1449] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1448] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1448] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1447] exit_group(0) = ?
[pid 1449] <... futex resumed>) = ?
[pid 1448] <... futex resumed>) = ?
[pid 1449] +++ exited with 0 +++
[pid 1448] +++ exited with 0 +++
[pid 1447] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1447, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1450
./strace-static-x86_64: Process 1450 attached
[pid 1450] set_robust_list(0x5555560865e0, 24) = 0
[pid 1450] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1450] setpgid(0, 0) = 0
[pid 1450] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1450] write(3, "1000", 4) = 4
[pid 1450] close(3) = 0
[pid 1450] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1450] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1450] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1450] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1451 attached
, parent_tid=[1451], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1451
[pid 1451] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1451] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1450] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1451] <... futex resumed>) = 0
[pid 1450] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1451] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1451] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1451] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1450] <... futex resumed>) = 0
[pid 1450] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1451] <... futex resumed>) = 0
[pid 1451] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1450] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1451] <... mount resumed>) = 0
[pid 1451] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1451] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1450] <... futex resumed>) = 0
[pid 1450] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1451] <... futex resumed>) = 0
[pid 1450] <... futex resumed>) = 1
[pid 1451] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1450] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1451] <... mount resumed>) = 0
[pid 1451] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1450] <... futex resumed>) = 0
[pid 1450] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1450] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1450] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1451] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1450] <... mmap resumed>) = 0x7f236e446000
[pid 1450] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1451] <... umount2 resumed>) = 0
[pid 1451] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1451] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1450] <... mprotect resumed>) = 0
[pid 1450] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1452 attached
<unfinished ...>
[pid 1452] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1452] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1450] <... clone resumed>, parent_tid=[1452], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1452
[pid 1450] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1450] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1452] <... futex resumed>) = 0
[pid 1452] umount2("./file0", MNT_DETACH) = 0
[pid 1452] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1450] <... futex resumed>) = 0
[pid 1452] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1450] exit_group(0) = ?
[pid 1451] <... futex resumed>) = ?
[pid 1451] +++ exited with 0 +++
[pid 1452] <... futex resumed>) = ?
[pid 1452] +++ exited with 0 +++
[pid 1450] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1450, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1453
./strace-static-x86_64: Process 1453 attached
[pid 1453] set_robust_list(0x5555560865e0, 24) = 0
[pid 1453] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1453] setpgid(0, 0) = 0
[pid 1453] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1453] write(3, "1000", 4) = 4
[pid 1453] close(3) = 0
[pid 1453] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1453] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1453] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1453] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1454 attached
<unfinished ...>
[pid 1454] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1454] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1453] <... clone resumed>, parent_tid=[1454], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1454
[pid 1453] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1454] <... futex resumed>) = 0
[pid 1453] <... futex resumed>) = 1
[pid 1453] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1454] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1454] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1454] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1453] <... futex resumed>) = 0
[pid 1453] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1454] <... futex resumed>) = 0
[pid 1453] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1454] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1454] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1453] <... futex resumed>) = 0
[pid 1454] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1453] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1453] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1454] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1454] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1454] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1453] <... futex resumed>) = 0
[pid 1453] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1453] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1453] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1453] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1453] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1455], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1455
[pid 1454] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 1455 attached
<unfinished ...>
[pid 1453] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1455] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1453] <... futex resumed>) = 0
[pid 1455] <... set_robust_list resumed>) = 0
[pid 1454] <... umount2 resumed>) = 0
[pid 1453] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1455] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1454] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1454] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1455] <... umount2 resumed>) = 0
[pid 1455] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1453] <... futex resumed>) = 0
[pid 1453] exit_group(0 <unfinished ...>
[pid 1455] exit_group(0 <unfinished ...>
[pid 1454] <... futex resumed>) = ?
[pid 1453] <... exit_group resumed>) = ?
[pid 1455] <... exit_group resumed>) = ?
[pid 1454] +++ exited with 0 +++
[pid 1455] +++ exited with 0 +++
[pid 1453] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1453, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1456
./strace-static-x86_64: Process 1456 attached
[pid 1456] set_robust_list(0x5555560865e0, 24) = 0
[pid 1456] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1456] setpgid(0, 0) = 0
[pid 1456] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1456] write(3, "1000", 4) = 4
[pid 1456] close(3) = 0
[pid 1456] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1456] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1456] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1456] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1457 attached
<unfinished ...>
[pid 1457] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1456] <... clone resumed>, parent_tid=[1457], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1457
[pid 1457] <... set_robust_list resumed>) = 0
[pid 1456] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1456] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1457] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1457] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1456] <... futex resumed>) = 0
[pid 1457] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1456] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1456] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1457] <... mount resumed>) = 0
[pid 1457] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1456] <... futex resumed>) = 0
[pid 1457] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1456] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1457] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1456] <... futex resumed>) = 0
[pid 1457] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1456] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1457] <... mount resumed>) = 0
[pid 1457] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1456] <... futex resumed>) = 0
[pid 1456] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1456] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1456] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1456] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1456] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1458 attached
<unfinished ...>
[pid 1457] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1456] <... clone resumed>, parent_tid=[1458], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1458
[pid 1456] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1456] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1458] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1457] <... umount2 resumed>) = 0
[pid 1458] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1457] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1457] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1458] <... umount2 resumed>) = 0
[pid 1458] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1456] <... futex resumed>) = 0
[pid 1456] exit_group(0) = ?
[pid 1457] <... futex resumed>) = ?
[pid 1457] +++ exited with 0 +++
[pid 1458] +++ exited with 0 +++
[pid 1456] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1456, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1459
./strace-static-x86_64: Process 1459 attached
[pid 1459] set_robust_list(0x5555560865e0, 24) = 0
[pid 1459] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1459] setpgid(0, 0) = 0
[pid 1459] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1459] write(3, "1000", 4) = 4
[pid 1459] close(3) = 0
[pid 1459] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1459] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1459] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1459] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1460 attached
, parent_tid=[1460], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1460
[pid 1460] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1460] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1459] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1460] <... futex resumed>) = 0
[pid 1460] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1460] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1460] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1459] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1459] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1460] <... futex resumed>) = 0
[pid 1460] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1460] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1460] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1459] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1459] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1460] <... futex resumed>) = 0
[pid 1460] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1459] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1460] <... mount resumed>) = 0
[pid 1460] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1460] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1459] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1459] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1460] <... futex resumed>) = 0
[pid 1460] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1459] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1460] <... umount2 resumed>) = 0
[pid 1460] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1460] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1459] <... futex resumed>) = 0
[pid 1459] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1459] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1459] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1461 attached
, parent_tid=[1461], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1461
[pid 1461] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1461] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1459] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1461] <... futex resumed>) = 0
[pid 1461] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1459] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1461] <... umount2 resumed>) = 0
[pid 1461] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1461] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1459] <... futex resumed>) = 0
[pid 1459] exit_group(0 <unfinished ...>
[pid 1460] <... futex resumed>) = ?
[pid 1459] <... exit_group resumed>) = ?
[pid 1460] +++ exited with 0 +++
[pid 1461] <... futex resumed>) = ?
[pid 1461] +++ exited with 0 +++
[pid 1459] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1459, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1462
./strace-static-x86_64: Process 1462 attached
[pid 1462] set_robust_list(0x5555560865e0, 24) = 0
[pid 1462] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1462] setpgid(0, 0) = 0
[pid 1462] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1462] write(3, "1000", 4) = 4
[pid 1462] close(3) = 0
[pid 1462] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1462] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1462] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1462] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1463 attached
, parent_tid=[1463], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1463
[pid 1463] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1462] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1463] <... set_robust_list resumed>) = 0
[pid 1462] <... futex resumed>) = 0
[pid 1462] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1463] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1463] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1462] <... futex resumed>) = 0
[pid 1463] <... futex resumed>) = 1
[pid 1462] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1463] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1462] <... futex resumed>) = 0
[pid 1462] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1463] <... mount resumed>) = 0
[pid 1463] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1462] <... futex resumed>) = 0
[pid 1463] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1462] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1463] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1462] <... futex resumed>) = 0
[pid 1463] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1462] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1463] <... mount resumed>) = 0
[pid 1463] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1462] <... futex resumed>) = 0
[pid 1462] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1462] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1462] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1462] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1462] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1463] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1462] <... clone resumed>, parent_tid=[1464], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1464
[pid 1462] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1463] <... umount2 resumed>) = 0
[pid 1462] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1463] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 1464 attached
[pid 1463] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1464] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1464] umount2("./file0", MNT_DETACH) = 0
[pid 1464] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1462] <... futex resumed>) = 0
[pid 1464] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1462] exit_group(0) = ?
[pid 1463] <... futex resumed>) = ?
[pid 1463] +++ exited with 0 +++
[pid 1464] <... futex resumed>) = ?
[pid 1464] +++ exited with 0 +++
[pid 1462] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1462, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1465
./strace-static-x86_64: Process 1465 attached
[pid 1465] set_robust_list(0x5555560865e0, 24) = 0
[pid 1465] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1465] setpgid(0, 0) = 0
[pid 1465] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1465] write(3, "1000", 4) = 4
[pid 1465] close(3) = 0
[pid 1465] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1465] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1465] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1465] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1466 attached
<unfinished ...>
[pid 1466] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1465] <... clone resumed>, parent_tid=[1466], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1466
[pid 1466] <... set_robust_list resumed>) = 0
[pid 1465] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1466] mkdir("./file0", 000 <unfinished ...>
[pid 1465] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1466] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1466] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1465] <... futex resumed>) = 0
[pid 1466] <... futex resumed>) = 1
[pid 1465] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1466] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1465] <... futex resumed>) = 0
[pid 1465] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1466] <... mount resumed>) = 0
[pid 1466] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1465] <... futex resumed>) = 0
[pid 1466] <... futex resumed>) = 1
[pid 1465] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1466] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1465] <... futex resumed>) = 0
[pid 1465] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1466] <... mount resumed>) = 0
[pid 1466] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1465] <... futex resumed>) = 0
[pid 1465] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1466] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1465] <... futex resumed>) = 0
[pid 1465] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1465] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1465] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1465] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1466] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 1467 attached
[pid 1466] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1467] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1465] <... clone resumed>, parent_tid=[1467], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1467
[pid 1466] <... futex resumed>) = 0
[pid 1467] <... set_robust_list resumed>) = 0
[pid 1465] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1466] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1465] <... futex resumed>) = 0
[pid 1467] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1465] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1467] <... umount2 resumed>) = 0
[pid 1467] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1465] <... futex resumed>) = 0
[pid 1467] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1465] exit_group(0) = ?
[pid 1467] <... futex resumed>) = 231
[pid 1466] <... futex resumed>) = ?
[pid 1466] +++ exited with 0 +++
[pid 1467] +++ exited with 0 +++
[pid 1465] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1465, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1468
./strace-static-x86_64: Process 1468 attached
[pid 1468] set_robust_list(0x5555560865e0, 24) = 0
[pid 1468] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1468] setpgid(0, 0) = 0
[pid 1468] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1468] write(3, "1000", 4) = 4
[pid 1468] close(3) = 0
[pid 1468] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1468] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1468] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1468] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1469], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1469
[pid 1468] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1468] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1469 attached
<unfinished ...>
[pid 1469] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1469] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1469] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1468] <... futex resumed>) = 0
[pid 1468] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1468] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1469] <... futex resumed>) = 1
[pid 1469] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1469] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1468] <... futex resumed>) = 0
[pid 1469] <... futex resumed>) = 1
[pid 1468] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1469] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1468] <... futex resumed>) = 0
[pid 1468] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1469] <... mount resumed>) = 0
[pid 1469] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1468] <... futex resumed>) = 0
[pid 1469] <... futex resumed>) = 1
[pid 1468] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1469] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1468] <... futex resumed>) = 0
[pid 1468] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1468] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1468] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1469] <... umount2 resumed>) = 0
[pid 1468] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1469] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1470 attached
) = 0
[pid 1468] <... clone resumed>, parent_tid=[1470], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1470
[pid 1470] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1469] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1470] <... set_robust_list resumed>) = 0
[pid 1468] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1470] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1468] <... futex resumed>) = 0
[pid 1468] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1470] <... umount2 resumed>) = 0
[pid 1470] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1468] <... futex resumed>) = 0
[pid 1470] <... futex resumed>) = 1
[pid 1468] exit_group(0 <unfinished ...>
[pid 1470] ????( <unfinished ...>
[pid 1468] <... exit_group resumed>) = ?
[pid 1470] <... ???? resumed>) = ?
[pid 1469] <... futex resumed>) = ?
[pid 1469] +++ exited with 0 +++
[pid 1470] +++ exited with 0 +++
[pid 1468] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1468, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1471
./strace-static-x86_64: Process 1471 attached
[pid 1471] set_robust_list(0x5555560865e0, 24) = 0
[pid 1471] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1471] setpgid(0, 0) = 0
[pid 1471] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1471] write(3, "1000", 4) = 4
[pid 1471] close(3) = 0
[pid 1471] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1471] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1471] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1471] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1472], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1472
./strace-static-x86_64: Process 1472 attached
[pid 1471] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1472] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1472] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1472] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1472] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1471] <... futex resumed>) = 1
[pid 1471] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1472] <... futex resumed>) = 0
[pid 1472] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1471] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1471] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1472] <... futex resumed>) = 0
[pid 1471] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1472] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1472] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1472] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1471] <... futex resumed>) = 0
[pid 1471] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1472] <... futex resumed>) = 0
[pid 1471] <... futex resumed>) = 1
[pid 1472] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1471] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1472] <... mount resumed>) = 0
[pid 1472] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1471] <... futex resumed>) = 0
[pid 1471] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1471] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1471] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1471] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1471] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1472] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1471] <... clone resumed>, parent_tid=[1473], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1473
[pid 1471] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1471] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1473 attached
<unfinished ...>
[pid 1473] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1473] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1472] <... umount2 resumed>) = 0
[pid 1472] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1473] <... umount2 resumed>) = 0
[pid 1472] <... futex resumed>) = 0
[pid 1473] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1471] <... futex resumed>) = 0
[pid 1471] exit_group(0) = ?
[pid 1473] <... futex resumed>) = ?
[pid 1473] +++ exited with 0 +++
[pid 1472] +++ exited with 0 +++
[pid 1471] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1471, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1474
./strace-static-x86_64: Process 1474 attached
[pid 1474] set_robust_list(0x5555560865e0, 24) = 0
[pid 1474] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1474] setpgid(0, 0) = 0
[pid 1474] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1474] write(3, "1000", 4) = 4
[pid 1474] close(3) = 0
[pid 1474] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1474] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1474] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1474] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1475 attached
, parent_tid=[1475], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1475
[pid 1475] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1474] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1475] <... set_robust_list resumed>) = 0
[pid 1474] <... futex resumed>) = 0
[pid 1474] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1475] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1475] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1474] <... futex resumed>) = 0
[pid 1475] <... futex resumed>) = 1
[pid 1474] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1475] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1474] <... futex resumed>) = 0
[pid 1474] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1475] <... mount resumed>) = 0
[pid 1475] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1474] <... futex resumed>) = 0
[pid 1475] <... futex resumed>) = 1
[pid 1474] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1475] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1474] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1475] <... mount resumed>) = 0
[pid 1475] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1474] <... futex resumed>) = 0
[pid 1475] <... futex resumed>) = 1
[pid 1474] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1475] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1474] <... futex resumed>) = 0
[pid 1474] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1474] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1474] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1474] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1475] <... umount2 resumed>) = 0
[pid 1475] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1476 attached
) = 0
[pid 1474] <... clone resumed>, parent_tid=[1476], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1476
[pid 1476] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1475] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1474] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1476] <... set_robust_list resumed>) = 0
[pid 1474] <... futex resumed>) = 0
[pid 1476] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1474] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1476] <... umount2 resumed>) = 0
[pid 1476] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1474] <... futex resumed>) = 0
[pid 1476] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1474] exit_group(0) = ?
[pid 1475] <... futex resumed>) = 231
[pid 1476] <... futex resumed>) = ?
[pid 1475] +++ exited with 0 +++
[pid 1476] +++ exited with 0 +++
[pid 1474] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1474, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1477 attached
, child_tidptr=0x5555560865d0) = 1477
[pid 1477] set_robust_list(0x5555560865e0, 24) = 0
[pid 1477] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1477] setpgid(0, 0) = 0
[pid 1477] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1477] write(3, "1000", 4) = 4
[pid 1477] close(3) = 0
[pid 1477] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1477] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1477] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1477] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1478 attached
, parent_tid=[1478], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1478
[pid 1478] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1478] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1477] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1478] <... futex resumed>) = 0
[pid 1478] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1478] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1478] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1477] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1477] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1478] <... futex resumed>) = 0
[pid 1478] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1477] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1478] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1478] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1477] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1477] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1478] <... futex resumed>) = 0
[pid 1478] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1477] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1478] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1478] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1477] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1477] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1478] <... futex resumed>) = 0
[pid 1478] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1477] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1478] <... umount2 resumed>) = 0
[pid 1478] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1478] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1477] <... futex resumed>) = 0
[pid 1477] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1477] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1477] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1479 attached
<unfinished ...>
[pid 1479] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1479] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1477] <... clone resumed>, parent_tid=[1479], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1479
[pid 1477] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1479] <... futex resumed>) = 0
[pid 1479] umount2("./file0", MNT_DETACH) = 0
[pid 1479] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1479] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1477] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1477] exit_group(0) = ?
[pid 1478] <... futex resumed>) = ?
[pid 1478] +++ exited with 0 +++
[pid 1479] <... futex resumed>) = ?
[pid 1479] +++ exited with 0 +++
[pid 1477] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1477, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1480
./strace-static-x86_64: Process 1480 attached
[pid 1480] set_robust_list(0x5555560865e0, 24) = 0
[pid 1480] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1480] setpgid(0, 0) = 0
[pid 1480] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1480] write(3, "1000", 4) = 4
[pid 1480] close(3) = 0
[pid 1480] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1480] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1480] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1480] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1481], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1481
[pid 1480] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1480] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1481 attached
<unfinished ...>
[pid 1481] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1481] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1481] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1480] <... futex resumed>) = 0
[pid 1480] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1480] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1481] <... futex resumed>) = 1
[pid 1481] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1481] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1480] <... futex resumed>) = 0
[pid 1480] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1480] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1481] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1481] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1480] <... futex resumed>) = 0
[pid 1480] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1480] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1480] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1481] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1480] <... mmap resumed>) = 0x7f236e446000
[pid 1480] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1480] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1481] <... umount2 resumed>) = 0
[pid 1480] <... clone resumed>, parent_tid=[1482], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1482
[pid 1481] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1482 attached
) = 0
[pid 1480] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1481] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1480] <... futex resumed>) = 0
[pid 1480] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1482] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1482] umount2("./file0", MNT_DETACH) = 0
[pid 1482] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1480] <... futex resumed>) = 0
[pid 1480] exit_group(0) = ?
[pid 1481] <... futex resumed>) = ?
[pid 1481] +++ exited with 0 +++
[pid 1482] +++ exited with 0 +++
[pid 1480] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1480, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1483
./strace-static-x86_64: Process 1483 attached
[pid 1483] set_robust_list(0x5555560865e0, 24) = 0
[pid 1483] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1483] setpgid(0, 0) = 0
[pid 1483] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1483] write(3, "1000", 4) = 4
[pid 1483] close(3) = 0
[pid 1483] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1483] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1483] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1483] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1484 attached
, parent_tid=[1484], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1484
[pid 1484] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1484] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1483] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1484] <... futex resumed>) = 0
[pid 1484] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1484] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1483] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1484] <... futex resumed>) = 0
[pid 1484] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1483] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1483] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1484] <... futex resumed>) = 0
[pid 1484] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1484] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1484] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1483] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1483] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1484] <... futex resumed>) = 0
[pid 1484] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1483] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1484] <... mount resumed>) = 0
[pid 1484] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1483] <... futex resumed>) = 0
[pid 1483] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1483] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1483] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1484] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1483] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1483] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1485], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1485
[pid 1484] <... umount2 resumed>) = 0
[pid 1483] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1483] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1485 attached
<unfinished ...>
[pid 1485] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1485] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1484] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1484] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1485] <... umount2 resumed>) = 0
[pid 1485] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1483] <... futex resumed>) = 0
[pid 1483] exit_group(0) = ?
[pid 1484] <... futex resumed>) = ?
[pid 1485] <... futex resumed>) = ?
[pid 1484] +++ exited with 0 +++
[pid 1485] +++ exited with 0 +++
[pid 1483] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1483, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1486
./strace-static-x86_64: Process 1486 attached
[pid 1486] set_robust_list(0x5555560865e0, 24) = 0
[pid 1486] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1486] setpgid(0, 0) = 0
[pid 1486] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1486] write(3, "1000", 4) = 4
[pid 1486] close(3) = 0
[pid 1486] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1486] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1486] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1486] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1487 attached
, parent_tid=[1487], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1487
[pid 1487] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1486] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1487] <... set_robust_list resumed>) = 0
[pid 1486] <... futex resumed>) = 0
[pid 1486] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1487] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1487] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1486] <... futex resumed>) = 0
[pid 1487] <... futex resumed>) = 1
[pid 1486] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1486] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1487] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1487] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1486] <... futex resumed>) = 0
[pid 1486] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1486] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1487] <... futex resumed>) = 1
[pid 1487] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1487] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1486] <... futex resumed>) = 0
[pid 1486] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1486] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1486] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1486] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1486] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1488 attached
, parent_tid=[1488], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1488
[pid 1486] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1486] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1487] <... futex resumed>) = 1
[pid 1487] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1488] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1488] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1487] <... umount2 resumed>) = 0
[pid 1487] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1487] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1488] <... umount2 resumed>) = 0
[pid 1488] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1486] <... futex resumed>) = 0
[pid 1488] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1486] exit_group(0) = ?
[pid 1487] <... futex resumed>) = ?
[pid 1487] +++ exited with 0 +++
[pid 1488] <... futex resumed>) = ?
[pid 1488] +++ exited with 0 +++
[pid 1486] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1486, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1489
./strace-static-x86_64: Process 1489 attached
[pid 1489] set_robust_list(0x5555560865e0, 24) = 0
[pid 1489] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1489] setpgid(0, 0) = 0
[pid 1489] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1489] write(3, "1000", 4) = 4
[pid 1489] close(3) = 0
[pid 1489] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1489] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1489] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1489] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1490], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1490
[pid 1489] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1489] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1490 attached
<unfinished ...>
[pid 1490] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1490] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1490] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1489] <... futex resumed>) = 0
[pid 1489] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1489] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1490] <... futex resumed>) = 1
[pid 1490] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1490] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1489] <... futex resumed>) = 0
[pid 1489] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1489] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1490] <... futex resumed>) = 1
[pid 1490] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1490] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1489] <... futex resumed>) = 0
[pid 1489] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1489] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1489] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1489] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1489] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1491 attached
, parent_tid=[1491], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1491
[pid 1489] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1489] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1491] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1490] <... futex resumed>) = 1
[pid 1490] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1491] <... set_robust_list resumed>) = 0
[pid 1490] <... umount2 resumed>) = 0
[pid 1491] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1490] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1490] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1491] <... umount2 resumed>) = 0
[pid 1491] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1489] <... futex resumed>) = 0
[pid 1489] exit_group(0) = ?
[pid 1491] +++ exited with 0 +++
[pid 1490] <... futex resumed>) = ?
[pid 1490] +++ exited with 0 +++
[pid 1489] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1489, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1492
./strace-static-x86_64: Process 1492 attached
[pid 1492] set_robust_list(0x5555560865e0, 24) = 0
[pid 1492] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1492] setpgid(0, 0) = 0
[pid 1492] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1492] write(3, "1000", 4) = 4
[pid 1492] close(3) = 0
[pid 1492] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1492] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1492] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1492] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1493 attached
, parent_tid=[1493], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1493
[pid 1493] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1493] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1492] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1493] <... futex resumed>) = 0
[pid 1493] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1493] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1493] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1492] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1492] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1493] <... futex resumed>) = 0
[pid 1492] <... futex resumed>) = 1
[pid 1493] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1492] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1493] <... mount resumed>) = 0
[pid 1493] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1493] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1492] <... futex resumed>) = 0
[pid 1492] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1493] <... futex resumed>) = 0
[pid 1493] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1492] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1493] <... mount resumed>) = 0
[pid 1493] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1493] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1492] <... futex resumed>) = 0
[pid 1492] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1493] <... futex resumed>) = 0
[pid 1493] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1492] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1493] <... umount2 resumed>) = 0
[pid 1493] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1493] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1492] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1492] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1492] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1494 attached
, parent_tid=[1494], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1494
[pid 1494] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1494] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1492] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1494] <... futex resumed>) = 0
[pid 1494] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1492] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1494] <... umount2 resumed>) = 0
[pid 1494] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1494] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1492] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1492] exit_group(0 <unfinished ...>
[pid 1493] <... futex resumed>) = ?
[pid 1492] <... exit_group resumed>) = ?
[pid 1493] +++ exited with 0 +++
[pid 1494] <... futex resumed>) = ?
[pid 1494] +++ exited with 0 +++
[pid 1492] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1492, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1495
./strace-static-x86_64: Process 1495 attached
[pid 1495] set_robust_list(0x5555560865e0, 24) = 0
[pid 1495] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1495] setpgid(0, 0) = 0
[pid 1495] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1495] write(3, "1000", 4) = 4
[pid 1495] close(3) = 0
[pid 1495] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1495] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1495] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1495] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1496 attached
<unfinished ...>
[pid 1496] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1495] <... clone resumed>, parent_tid=[1496], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1496
[pid 1495] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1495] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1496] <... set_robust_list resumed>) = 0
[pid 1496] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1496] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1495] <... futex resumed>) = 0
[pid 1496] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1495] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1496] <... mount resumed>) = 0
[pid 1495] <... futex resumed>) = 0
[pid 1496] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1495] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1496] <... futex resumed>) = 0
[pid 1496] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1495] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1496] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1495] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1496] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1495] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1496] <... mount resumed>) = 0
[pid 1496] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1495] <... futex resumed>) = 0
[pid 1495] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1495] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1495] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1495] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1496] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1495] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1497], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1497
[pid 1495] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1496] <... umount2 resumed>) = 0
[pid 1495] <... futex resumed>) = 0
[pid 1495] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1496] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1497 attached
<unfinished ...>
[pid 1497] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1497] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1496] <... futex resumed>) = 0
[pid 1497] <... umount2 resumed>) = 0
[pid 1497] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1495] <... futex resumed>) = 0
[pid 1495] exit_group(0) = ?
[pid 1496] +++ exited with 0 +++
[pid 1497] <... futex resumed>) = ?
[pid 1497] +++ exited with 0 +++
[pid 1495] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1495, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1498
./strace-static-x86_64: Process 1498 attached
[pid 1498] set_robust_list(0x5555560865e0, 24) = 0
[pid 1498] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1498] setpgid(0, 0) = 0
[pid 1498] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1498] write(3, "1000", 4) = 4
[pid 1498] close(3) = 0
[pid 1498] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1498] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1498] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1498] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1499 attached
, parent_tid=[1499], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1499
[pid 1499] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1498] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1499] <... set_robust_list resumed>) = 0
[pid 1498] <... futex resumed>) = 0
[pid 1498] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1499] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1499] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1498] <... futex resumed>) = 0
[pid 1499] <... futex resumed>) = 1
[pid 1498] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1499] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1498] <... futex resumed>) = 0
[pid 1498] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1499] <... mount resumed>) = 0
[pid 1499] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1498] <... futex resumed>) = 0
[pid 1499] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1498] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1499] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1498] <... futex resumed>) = 0
[pid 1498] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1499] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1499] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1498] <... futex resumed>) = 0
[pid 1498] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1499] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1498] <... futex resumed>) = 0
[pid 1498] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1498] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1498] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1498] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1500 attached
<unfinished ...>
[pid 1499] <... umount2 resumed>) = 0
[pid 1498] <... clone resumed>, parent_tid=[1500], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1500
[pid 1500] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1498] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1499] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1498] <... futex resumed>) = 0
[pid 1500] <... set_robust_list resumed>) = 0
[pid 1498] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1499] <... futex resumed>) = 0
[pid 1500] umount2("./file0", MNT_DETACH) = 0
[pid 1499] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1500] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1498] <... futex resumed>) = 0
[pid 1498] exit_group(0) = ?
[pid 1500] <... futex resumed>) = ?
[pid 1499] <... futex resumed>) = ?
[pid 1500] +++ exited with 0 +++
[pid 1499] +++ exited with 0 +++
[pid 1498] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1498, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1501
./strace-static-x86_64: Process 1501 attached
[pid 1501] set_robust_list(0x5555560865e0, 24) = 0
[pid 1501] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1501] setpgid(0, 0) = 0
[pid 1501] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1501] write(3, "1000", 4) = 4
[pid 1501] close(3) = 0
[pid 1501] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1501] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1501] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1501] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1502], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1502
[pid 1501] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1501] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1502 attached
<unfinished ...>
[pid 1502] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1502] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1502] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1501] <... futex resumed>) = 0
[pid 1501] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1501] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1502] <... futex resumed>) = 1
[pid 1502] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1502] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1501] <... futex resumed>) = 0
[pid 1501] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1501] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1502] <... futex resumed>) = 1
[pid 1502] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1502] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1501] <... futex resumed>) = 0
[pid 1502] <... futex resumed>) = 1
[pid 1501] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1502] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1501] <... futex resumed>) = 0
[pid 1501] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1501] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1501] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1501] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1502] <... umount2 resumed>) = 0
[pid 1502] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1503 attached
) = 0
[pid 1501] <... clone resumed>, parent_tid=[1503], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1503
[pid 1503] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1502] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1501] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1503] <... set_robust_list resumed>) = 0
[pid 1501] <... futex resumed>) = 0
[pid 1503] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1501] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1503] <... umount2 resumed>) = 0
[pid 1503] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1501] <... futex resumed>) = 0
[pid 1503] <... futex resumed>) = 1
[pid 1501] exit_group(0 <unfinished ...>
[pid 1503] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1501] <... exit_group resumed>) = ?
[pid 1502] <... futex resumed>) = ?
[pid 1502] +++ exited with 0 +++
[pid 1503] <... futex resumed>) = ?
[pid 1503] +++ exited with 0 +++
[pid 1501] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1501, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1504
./strace-static-x86_64: Process 1504 attached
[pid 1504] set_robust_list(0x5555560865e0, 24) = 0
[pid 1504] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1504] setpgid(0, 0) = 0
[pid 1504] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1504] write(3, "1000", 4) = 4
[pid 1504] close(3) = 0
[pid 1504] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1504] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1504] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1504] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1505], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1505
[pid 1504] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1504] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1505 attached
<unfinished ...>
[pid 1505] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1505] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1505] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1504] <... futex resumed>) = 0
[pid 1504] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1504] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1505] <... futex resumed>) = 1
[pid 1505] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1505] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1504] <... futex resumed>) = 0
[pid 1504] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1504] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1505] <... futex resumed>) = 1
[pid 1505] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1505] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1504] <... futex resumed>) = 0
[pid 1504] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1504] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1504] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1504] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1504] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1506], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1506
[pid 1504] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1504] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1505] <... futex resumed>) = 1
[pid 1505] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 1506 attached
<unfinished ...>
[pid 1506] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1505] <... umount2 resumed>) = 0
[pid 1505] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1505] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1506] <... set_robust_list resumed>) = 0
[pid 1506] umount2("./file0", MNT_DETACH) = 0
[pid 1506] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1504] <... futex resumed>) = 0
[pid 1506] <... futex resumed>) = 1
[pid 1504] exit_group(0 <unfinished ...>
[pid 1506] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1504] <... exit_group resumed>) = ?
[pid 1506] <... futex resumed>) = ?
[pid 1505] <... futex resumed>) = ?
[pid 1505] +++ exited with 0 +++
[pid 1506] +++ exited with 0 +++
[pid 1504] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1504, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1507
./strace-static-x86_64: Process 1507 attached
[pid 1507] set_robust_list(0x5555560865e0, 24) = 0
[pid 1507] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1507] setpgid(0, 0) = 0
[pid 1507] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1507] write(3, "1000", 4) = 4
[pid 1507] close(3) = 0
[pid 1507] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1507] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1507] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1507] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1508 attached
, parent_tid=[1508], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1508
[pid 1508] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1507] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1508] <... set_robust_list resumed>) = 0
[pid 1507] <... futex resumed>) = 0
[pid 1507] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1508] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1508] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1507] <... futex resumed>) = 0
[pid 1508] <... futex resumed>) = 1
[pid 1507] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1508] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1507] <... futex resumed>) = 0
[pid 1507] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1508] <... mount resumed>) = 0
[pid 1508] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1507] <... futex resumed>) = 0
[pid 1507] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1508] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1507] <... futex resumed>) = 0
[pid 1507] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1508] <... mount resumed>) = 0
[pid 1508] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1507] <... futex resumed>) = 0
[pid 1508] <... futex resumed>) = 1
[pid 1507] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1508] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1507] <... futex resumed>) = 0
[pid 1507] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1507] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1507] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1507] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1508] <... umount2 resumed>) = 0
[pid 1507] <... clone resumed>, parent_tid=[1509], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1509
./strace-static-x86_64: Process 1509 attached
[pid 1507] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1507] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1508] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1508] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1509] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1509] umount2("./file0", MNT_DETACH) = 0
[pid 1509] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1507] <... futex resumed>) = 0
[pid 1509] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1507] exit_group(0) = ?
[pid 1508] <... futex resumed>) = ?
[pid 1508] +++ exited with 0 +++
[pid 1509] <... futex resumed>) = ?
[pid 1509] +++ exited with 0 +++
[pid 1507] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1507, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1510
./strace-static-x86_64: Process 1510 attached
[pid 1510] set_robust_list(0x5555560865e0, 24) = 0
[pid 1510] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1510] setpgid(0, 0) = 0
[pid 1510] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1510] write(3, "1000", 4) = 4
[pid 1510] close(3) = 0
[pid 1510] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1510] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1510] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1510] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1511], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1511
./strace-static-x86_64: Process 1511 attached
[pid 1510] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1511] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1510] <... futex resumed>) = 0
[pid 1511] <... set_robust_list resumed>) = 0
[pid 1510] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1511] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1511] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1510] <... futex resumed>) = 0
[pid 1511] <... futex resumed>) = 1
[pid 1511] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1510] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1510] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1511] <... mount resumed>) = 0
[pid 1511] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1510] <... futex resumed>) = 0
[pid 1510] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1511] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1510] <... futex resumed>) = 0
[pid 1510] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1511] <... mount resumed>) = 0
[pid 1511] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1510] <... futex resumed>) = 0
[pid 1511] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1510] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1510] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1510] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1510] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1511] <... umount2 resumed>) = 0
[pid 1510] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1511] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 1512 attached
[pid 1511] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1510] <... clone resumed>, parent_tid=[1512], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1512
[pid 1512] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1510] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1512] <... set_robust_list resumed>) = 0
[pid 1510] <... futex resumed>) = 0
[pid 1512] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1510] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1512] <... umount2 resumed>) = 0
[pid 1512] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1510] <... futex resumed>) = 0
[pid 1512] <... futex resumed>) = 1
[pid 1512] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1510] exit_group(0) = ?
[pid 1511] <... futex resumed>) = 231
[pid 1512] <... futex resumed>) = ? <unavailable>
[pid 1511] +++ exited with 0 +++
[pid 1512] +++ exited with 0 +++
[pid 1510] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1510, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1513
./strace-static-x86_64: Process 1513 attached
[pid 1513] set_robust_list(0x5555560865e0, 24) = 0
[pid 1513] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1513] setpgid(0, 0) = 0
[pid 1513] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1513] write(3, "1000", 4) = 4
[pid 1513] close(3) = 0
[pid 1513] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1513] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1513] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1513] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1514 attached
, parent_tid=[1514], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1514
[pid 1513] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1513] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1514] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1514] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1514] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1513] <... futex resumed>) = 0
[pid 1513] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1513] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1514] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1514] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1513] <... futex resumed>) = 0
[pid 1513] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1513] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1514] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1514] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1513] <... futex resumed>) = 0
[pid 1513] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1513] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1513] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1513] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1513] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1514] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1513] <... clone resumed>, parent_tid=[1515], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1515
[pid 1513] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1513] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1515 attached
<unfinished ...>
[pid 1515] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1515] umount2("./file0", MNT_DETACH) = 0
[pid 1515] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1513] <... futex resumed>) = 0
[pid 1515] <... futex resumed>) = 1
[pid 1515] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1514] <... umount2 resumed>) = 0
[pid 1514] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1514] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1513] exit_group(0) = ?
[pid 1514] <... futex resumed>) = ?
[pid 1515] <... futex resumed>) = ?
[pid 1515] +++ exited with 0 +++
[pid 1514] +++ exited with 0 +++
[pid 1513] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1513, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1516
./strace-static-x86_64: Process 1516 attached
[pid 1516] set_robust_list(0x5555560865e0, 24) = 0
[pid 1516] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1516] setpgid(0, 0) = 0
[pid 1516] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1516] write(3, "1000", 4) = 4
[pid 1516] close(3) = 0
[pid 1516] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1516] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1516] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1516] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1517 attached
, parent_tid=[1517], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1517
[pid 1517] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1516] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1517] <... set_robust_list resumed>) = 0
[pid 1517] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1517] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1517] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1516] <... futex resumed>) = 1
[pid 1517] <... futex resumed>) = 0
[pid 1517] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1516] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1516] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1517] <... futex resumed>) = 0
[pid 1516] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1517] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1517] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1517] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1516] <... futex resumed>) = 0
[pid 1516] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1517] <... futex resumed>) = 0
[pid 1516] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1517] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1517] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1517] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1516] <... futex resumed>) = 0
[pid 1516] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1517] <... futex resumed>) = 0
[pid 1516] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1517] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1516] <... futex resumed>) = 0
[pid 1516] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1516] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1517] <... umount2 resumed>) = 0
[pid 1517] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1517] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1516] <... mprotect resumed>) = 0
[pid 1516] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1518 attached
, parent_tid=[1518], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1518
[pid 1518] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1516] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1518] <... set_robust_list resumed>) = 0
[pid 1516] <... futex resumed>) = 0
[pid 1518] umount2("./file0", MNT_DETACH) = 0
[pid 1516] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1518] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1516] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1518] <... futex resumed>) = 0
[pid 1518] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1516] exit_group(0 <unfinished ...>
[pid 1518] <... futex resumed>) = ?
[pid 1517] <... futex resumed>) = ?
[pid 1516] <... exit_group resumed>) = ?
[pid 1517] +++ exited with 0 +++
[pid 1518] +++ exited with 0 +++
[pid 1516] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1516, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1519
./strace-static-x86_64: Process 1519 attached
[pid 1519] set_robust_list(0x5555560865e0, 24) = 0
[pid 1519] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1519] setpgid(0, 0) = 0
[pid 1519] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1519] write(3, "1000", 4) = 4
[pid 1519] close(3) = 0
[pid 1519] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1519] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1519] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1519] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1520 attached
, parent_tid=[1520], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1520
[pid 1519] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1520] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1519] <... futex resumed>) = 0
[pid 1520] <... set_robust_list resumed>) = 0
[pid 1519] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1520] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1520] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1519] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1519] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1520] <... futex resumed>) = 0
[pid 1520] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1519] <... futex resumed>) = 0
[pid 1519] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1520] <... mount resumed>) = 0
[pid 1520] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1520] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1519] <... futex resumed>) = 0
[pid 1519] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1520] <... futex resumed>) = 0
[pid 1519] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1520] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1520] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1519] <... futex resumed>) = 0
[pid 1520] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1519] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1519] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1519] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1519] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1519] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1520] <... umount2 resumed>) = 0
[pid 1520] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1520] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1521 attached
<unfinished ...>
[pid 1521] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1519] <... clone resumed>, parent_tid=[1521], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1521
[pid 1519] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1521] <... set_robust_list resumed>) = 0
[pid 1519] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1521] umount2("./file0", MNT_DETACH) = 0
[pid 1521] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1519] <... futex resumed>) = 0
[pid 1519] exit_group(0) = ?
[pid 1520] <... futex resumed>) = ?
[pid 1520] +++ exited with 0 +++
[pid 1521] <... futex resumed>) = ?
[pid 1521] +++ exited with 0 +++
[pid 1519] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1519, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1522
./strace-static-x86_64: Process 1522 attached
[pid 1522] set_robust_list(0x5555560865e0, 24) = 0
[pid 1522] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1522] setpgid(0, 0) = 0
[pid 1522] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1522] write(3, "1000", 4) = 4
[pid 1522] close(3) = 0
[pid 1522] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1522] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1522] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1522] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1523 attached
<unfinished ...>
[pid 1523] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1523] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1522] <... clone resumed>, parent_tid=[1523], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1523
[pid 1522] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1523] <... futex resumed>) = 0
[pid 1523] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1523] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1523] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1522] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1522] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1523] <... futex resumed>) = 0
[pid 1523] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1522] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1523] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1523] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1522] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1522] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1523] <... futex resumed>) = 0
[pid 1523] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1522] <... futex resumed>) = 1
[pid 1523] <... mount resumed>) = 0
[pid 1523] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1523] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1522] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1522] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1523] <... futex resumed>) = 0
[pid 1523] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1522] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1523] <... umount2 resumed>) = 0
[pid 1523] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1523] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1522] <... futex resumed>) = 0
[pid 1522] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1522] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1522] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1524 attached
, parent_tid=[1524], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1524
[pid 1524] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1524] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1522] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1524] <... futex resumed>) = 0
[pid 1524] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1522] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1524] <... umount2 resumed>) = 0
[pid 1524] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1524] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1522] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1522] exit_group(0 <unfinished ...>
[pid 1523] <... futex resumed>) = ?
[pid 1522] <... exit_group resumed>) = ?
[pid 1523] +++ exited with 0 +++
[pid 1524] <... futex resumed>) = ?
[pid 1524] +++ exited with 0 +++
[pid 1522] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1522, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1525
./strace-static-x86_64: Process 1525 attached
[pid 1525] set_robust_list(0x5555560865e0, 24) = 0
[pid 1525] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1525] setpgid(0, 0) = 0
[pid 1525] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1525] write(3, "1000", 4) = 4
[pid 1525] close(3) = 0
[pid 1525] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1525] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1525] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1525] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1526 attached
, parent_tid=[1526], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1526
[pid 1526] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1525] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1526] <... set_robust_list resumed>) = 0
[pid 1525] <... futex resumed>) = 0
[pid 1525] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1526] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1526] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1525] <... futex resumed>) = 0
[pid 1525] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1525] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1526] <... futex resumed>) = 1
[pid 1526] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1526] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1525] <... futex resumed>) = 0
[pid 1525] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1525] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1526] <... futex resumed>) = 1
[pid 1526] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1526] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1525] <... futex resumed>) = 0
[pid 1525] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1526] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1525] <... futex resumed>) = 0
[pid 1525] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1525] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1525] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1525] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1527 attached
<unfinished ...>
[pid 1526] <... umount2 resumed>) = 0
[pid 1527] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1526] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1525] <... clone resumed>, parent_tid=[1527], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1527
[pid 1527] <... set_robust_list resumed>) = 0
[pid 1526] <... futex resumed>) = 0
[pid 1525] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1527] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1526] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1525] <... futex resumed>) = 0
[pid 1525] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1527] <... umount2 resumed>) = 0
[pid 1527] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1525] <... futex resumed>) = 0
[pid 1527] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1525] exit_group(0) = ?
[pid 1527] <... futex resumed>) = ?
[pid 1527] +++ exited with 0 +++
[pid 1526] <... futex resumed>) = ?
[pid 1526] +++ exited with 0 +++
[pid 1525] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1525, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1528
./strace-static-x86_64: Process 1528 attached
[pid 1528] set_robust_list(0x5555560865e0, 24) = 0
[pid 1528] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1528] setpgid(0, 0) = 0
[pid 1528] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1528] write(3, "1000", 4) = 4
[pid 1528] close(3) = 0
[pid 1528] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1528] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1528] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1528] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1529], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1529
[pid 1528] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1528] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1529 attached
<unfinished ...>
[pid 1529] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1529] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1529] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1528] <... futex resumed>) = 0
[pid 1528] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1528] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1529] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1529] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1528] <... futex resumed>) = 0
[pid 1528] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1528] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1529] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1529] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1528] <... futex resumed>) = 0
[pid 1528] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1528] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1528] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1528] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1528] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1530], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1530
[pid 1529] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1528] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1528] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1530 attached
<unfinished ...>
[pid 1530] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1530] umount2("./file0", MNT_DETACH) = 0
[pid 1530] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1528] <... futex resumed>) = 0
[pid 1530] <... futex resumed>) = 1
[pid 1530] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1529] <... umount2 resumed>) = 0
[pid 1529] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1529] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1528] exit_group(0) = ?
[pid 1530] <... futex resumed>) = ?
[pid 1530] +++ exited with 0 +++
[pid 1529] <... futex resumed>) = ?
[pid 1529] +++ exited with 0 +++
[pid 1528] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1528, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1531
./strace-static-x86_64: Process 1531 attached
[pid 1531] set_robust_list(0x5555560865e0, 24) = 0
[pid 1531] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1531] setpgid(0, 0) = 0
[pid 1531] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1531] write(3, "1000", 4) = 4
[pid 1531] close(3) = 0
[pid 1531] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1531] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1531] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1531] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1532 attached
, parent_tid=[1532], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1532
[pid 1532] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1532] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1531] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1532] <... futex resumed>) = 0
[pid 1532] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1532] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1532] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1531] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1531] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1532] <... futex resumed>) = 0
[pid 1532] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1531] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1532] <... mount resumed>) = 0
[pid 1532] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1532] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1531] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1531] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1532] <... futex resumed>) = 0
[pid 1532] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1531] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1532] <... mount resumed>) = 0
[pid 1532] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1532] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1531] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1531] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1532] <... futex resumed>) = 0
[pid 1532] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1531] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1532] <... umount2 resumed>) = 0
[pid 1532] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1532] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1531] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1531] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1531] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1533 attached
, parent_tid=[1533], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1533
[pid 1533] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1533] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1531] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1533] <... futex resumed>) = 0
[pid 1533] umount2("./file0", MNT_DETACH) = 0
[pid 1531] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1533] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1533] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1531] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1531] exit_group(0 <unfinished ...>
[pid 1532] <... futex resumed>) = ?
[pid 1531] <... exit_group resumed>) = ?
[pid 1532] +++ exited with 0 +++
[pid 1533] <... futex resumed>) = ?
[pid 1533] +++ exited with 0 +++
[pid 1531] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1531, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1534
./strace-static-x86_64: Process 1534 attached
[pid 1534] set_robust_list(0x5555560865e0, 24) = 0
[pid 1534] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1534] setpgid(0, 0) = 0
[pid 1534] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1534] write(3, "1000", 4) = 4
[pid 1534] close(3) = 0
[pid 1534] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1534] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1534] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1534] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1535 attached
, parent_tid=[1535], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1535
[pid 1534] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1535] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1534] <... futex resumed>) = 0
[pid 1534] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1535] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1535] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1534] <... futex resumed>) = 0
[pid 1535] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1534] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1535] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1534] <... futex resumed>) = 0
[pid 1534] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1535] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1535] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1534] <... futex resumed>) = 0
[pid 1535] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1534] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1534] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1535] <... mount resumed>) = 0
[pid 1535] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1534] <... futex resumed>) = 0
[pid 1534] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1534] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1534] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1535] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1534] <... mmap resumed>) = 0x7f236e446000
[pid 1534] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1534] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1535] <... umount2 resumed>) = 0
[pid 1535] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1536 attached
<unfinished ...>
[pid 1534] <... clone resumed>, parent_tid=[1536], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1536
[pid 1534] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1534] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1536] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1535] <... futex resumed>) = 0
[pid 1536] <... set_robust_list resumed>) = 0
[pid 1535] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1536] umount2("./file0", MNT_DETACH) = 0
[pid 1536] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1534] <... futex resumed>) = 0
[pid 1536] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1534] exit_group(0) = ?
[pid 1536] <... futex resumed>) = ?
[pid 1535] <... futex resumed>) = ?
[pid 1535] +++ exited with 0 +++
[pid 1536] +++ exited with 0 +++
[pid 1534] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1534, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1537
./strace-static-x86_64: Process 1537 attached
[pid 1537] set_robust_list(0x5555560865e0, 24) = 0
[pid 1537] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1537] setpgid(0, 0) = 0
[pid 1537] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1537] write(3, "1000", 4) = 4
[pid 1537] close(3) = 0
[pid 1537] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1537] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1537] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1537] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1538], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1538
[pid 1537] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1537] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1538 attached
<unfinished ...>
[pid 1538] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1538] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1538] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1537] <... futex resumed>) = 0
[pid 1538] <... futex resumed>) = 1
[pid 1537] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1538] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1537] <... futex resumed>) = 0
[pid 1537] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1538] <... mount resumed>) = 0
[pid 1538] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1537] <... futex resumed>) = 0
[pid 1538] <... futex resumed>) = 1
[pid 1537] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1537] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1538] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1538] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1537] <... futex resumed>) = 0
[pid 1538] <... futex resumed>) = 1
[pid 1537] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1538] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1537] <... futex resumed>) = 0
[pid 1537] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1537] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1537] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1537] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1538] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 1539 attached
[pid 1538] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1537] <... clone resumed>, parent_tid=[1539], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1539
[pid 1539] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1538] <... futex resumed>) = 0
[pid 1537] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1539] <... set_robust_list resumed>) = 0
[pid 1538] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1537] <... futex resumed>) = 0
[pid 1537] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1539] umount2("./file0", MNT_DETACH) = 0
[pid 1539] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1537] <... futex resumed>) = 0
[pid 1537] exit_group(0 <unfinished ...>
[pid 1538] <... futex resumed>) = ?
[pid 1537] <... exit_group resumed>) = ?
[pid 1538] +++ exited with 0 +++
[pid 1539] +++ exited with 0 +++
[pid 1537] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1537, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1540
./strace-static-x86_64: Process 1540 attached
[pid 1540] set_robust_list(0x5555560865e0, 24) = 0
[pid 1540] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1540] setpgid(0, 0) = 0
[pid 1540] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1540] write(3, "1000", 4) = 4
[pid 1540] close(3) = 0
[pid 1540] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1540] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1540] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1540] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1541 attached
, parent_tid=[1541], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1541
[pid 1541] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1540] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1541] <... set_robust_list resumed>) = 0
[pid 1540] <... futex resumed>) = 0
[pid 1540] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1541] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1541] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1540] <... futex resumed>) = 0
[pid 1541] <... futex resumed>) = 1
[pid 1540] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1541] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1540] <... futex resumed>) = 0
[pid 1540] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1541] <... mount resumed>) = 0
[pid 1541] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1540] <... futex resumed>) = 0
[pid 1541] <... futex resumed>) = 1
[pid 1540] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1541] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1540] <... futex resumed>) = 0
[pid 1540] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1541] <... mount resumed>) = 0
[pid 1541] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1540] <... futex resumed>) = 0
[pid 1541] <... futex resumed>) = 1
[pid 1540] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1541] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1540] <... futex resumed>) = 0
[pid 1540] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1540] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1540] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1541] <... umount2 resumed>) = 0
[pid 1540] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1541] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1542 attached
) = 0
[pid 1540] <... clone resumed>, parent_tid=[1542], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1542
[pid 1541] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1542] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1540] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1542] <... set_robust_list resumed>) = 0
[pid 1540] <... futex resumed>) = 0
[pid 1542] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1540] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1542] <... umount2 resumed>) = 0
[pid 1542] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1540] <... futex resumed>) = 0
[pid 1542] <... futex resumed>) = 1
[pid 1542] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1540] exit_group(0) = ?
[pid 1542] <... futex resumed>) = ?
[pid 1541] <... futex resumed>) = ?
[pid 1542] +++ exited with 0 +++
[pid 1541] +++ exited with 0 +++
[pid 1540] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1540, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1543
./strace-static-x86_64: Process 1543 attached
[pid 1543] set_robust_list(0x5555560865e0, 24) = 0
[pid 1543] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1543] setpgid(0, 0) = 0
[pid 1543] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1543] write(3, "1000", 4) = 4
[pid 1543] close(3) = 0
[pid 1543] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1543] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1543] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1543] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1544], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1544
[pid 1543] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1543] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1544 attached
<unfinished ...>
[pid 1544] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1544] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1544] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1543] <... futex resumed>) = 0
[pid 1543] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1543] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1544] <... futex resumed>) = 1
[pid 1544] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1544] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1543] <... futex resumed>) = 0
[pid 1543] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1543] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1544] <... futex resumed>) = 1
[pid 1544] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1544] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1543] <... futex resumed>) = 0
[pid 1543] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1543] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1543] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1543] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1543] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1545 attached
<unfinished ...>
[pid 1545] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1543] <... clone resumed>, parent_tid=[1545], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1545
[pid 1543] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1543] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1544] <... futex resumed>) = 1
[pid 1544] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1545] <... set_robust_list resumed>) = 0
[pid 1545] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1544] <... umount2 resumed>) = 0
[pid 1544] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1544] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1545] <... umount2 resumed>) = 0
[pid 1545] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1543] <... futex resumed>) = 0
[pid 1543] exit_group(0) = ?
[pid 1544] <... futex resumed>) = ?
[pid 1545] +++ exited with 0 +++
[pid 1544] +++ exited with 0 +++
[pid 1543] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1543, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1546
./strace-static-x86_64: Process 1546 attached
[pid 1546] set_robust_list(0x5555560865e0, 24) = 0
[pid 1546] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1546] setpgid(0, 0) = 0
[pid 1546] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1546] write(3, "1000", 4) = 4
[pid 1546] close(3) = 0
[pid 1546] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1546] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1546] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1546] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1547 attached
<unfinished ...>
[pid 1547] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1547] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1546] <... clone resumed>, parent_tid=[1547], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1547
[pid 1546] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1547] <... futex resumed>) = 0
[pid 1547] mkdir("./file0", 000 <unfinished ...>
[pid 1546] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1547] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1547] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1547] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1546] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1546] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1547] <... futex resumed>) = 0
[pid 1547] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1546] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1547] <... mount resumed>) = 0
[pid 1547] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1547] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1546] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1546] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1547] <... futex resumed>) = 0
[pid 1547] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1546] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1547] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1546] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1547] <... futex resumed>) = 0
[pid 1547] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1546] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1547] <... futex resumed>) = 0
[pid 1547] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1546] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1546] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1547] <... umount2 resumed>) = 0
[pid 1546] <... mmap resumed>) = 0x7f236e446000
[pid 1547] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1547] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1546] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1546] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1548 attached
, parent_tid=[1548], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1548
[pid 1548] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1546] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1548] <... set_robust_list resumed>) = 0
[pid 1546] <... futex resumed>) = 0
[pid 1548] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1546] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1548] <... umount2 resumed>) = 0
[pid 1548] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1546] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1548] <... futex resumed>) = 0
[pid 1548] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1546] exit_group(0) = ?
[pid 1547] <... futex resumed>) = ?
[pid 1547] +++ exited with 0 +++
[pid 1548] <... futex resumed>) = ?
[pid 1548] +++ exited with 0 +++
[pid 1546] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1546, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1549
./strace-static-x86_64: Process 1549 attached
[pid 1549] set_robust_list(0x5555560865e0, 24) = 0
[pid 1549] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1549] setpgid(0, 0) = 0
[pid 1549] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1549] write(3, "1000", 4) = 4
[pid 1549] close(3) = 0
[pid 1549] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1549] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1549] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1549] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1550], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1550
[pid 1549] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1549] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1550 attached
<unfinished ...>
[pid 1550] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1550] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1550] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1549] <... futex resumed>) = 0
[pid 1549] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1549] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1550] <... futex resumed>) = 1
[pid 1550] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1550] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1549] <... futex resumed>) = 0
[pid 1549] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1549] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1550] <... futex resumed>) = 1
[pid 1550] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1550] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1549] <... futex resumed>) = 0
[pid 1550] <... futex resumed>) = 1
[pid 1549] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1550] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1549] <... futex resumed>) = 0
[pid 1549] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1549] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1549] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1549] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1551], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1551
./strace-static-x86_64: Process 1551 attached
[pid 1550] <... umount2 resumed>) = 0
[pid 1549] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1551] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1550] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1549] <... futex resumed>) = 0
[pid 1551] <... set_robust_list resumed>) = 0
[pid 1550] <... futex resumed>) = 0
[pid 1549] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1551] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1550] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1551] <... umount2 resumed>) = 0
[pid 1551] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1549] <... futex resumed>) = 0
[pid 1551] <... futex resumed>) = 1
[pid 1549] exit_group(0 <unfinished ...>
[pid 1550] <... futex resumed>) = ? <unavailable>
[pid 1549] <... exit_group resumed>) = ?
[pid 1550] +++ exited with 0 +++
[pid 1551] +++ exited with 0 +++
[pid 1549] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1549, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1552
./strace-static-x86_64: Process 1552 attached
[pid 1552] set_robust_list(0x5555560865e0, 24) = 0
[pid 1552] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1552] setpgid(0, 0) = 0
[pid 1552] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1552] write(3, "1000", 4) = 4
[pid 1552] close(3) = 0
[pid 1552] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1552] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1552] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1552] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1553], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1553
[pid 1552] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1552] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1553 attached
<unfinished ...>
[pid 1553] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1553] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1553] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1552] <... futex resumed>) = 0
[pid 1552] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1552] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1553] <... futex resumed>) = 1
[pid 1553] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1553] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1552] <... futex resumed>) = 0
[pid 1552] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1552] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1553] <... futex resumed>) = 1
[pid 1553] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1553] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1552] <... futex resumed>) = 0
[pid 1552] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1552] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1552] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1552] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1553] <... futex resumed>) = 1
[pid 1552] <... mprotect resumed>) = 0
[pid 1553] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1552] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1554], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1554
./strace-static-x86_64: Process 1554 attached
[pid 1552] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1554] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1552] <... futex resumed>) = 0
[pid 1554] <... set_robust_list resumed>) = 0
[pid 1552] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1554] umount2("./file0", MNT_DETACH) = 0
[pid 1554] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1552] <... futex resumed>) = 0
[pid 1554] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1553] <... umount2 resumed>) = 0
[pid 1553] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1553] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1552] exit_group(0) = ?
[pid 1554] <... futex resumed>) = ?
[pid 1553] <... futex resumed>) = ?
[pid 1554] +++ exited with 0 +++
[pid 1553] +++ exited with 0 +++
[pid 1552] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1552, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1555
./strace-static-x86_64: Process 1555 attached
[pid 1555] set_robust_list(0x5555560865e0, 24) = 0
[pid 1555] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1555] setpgid(0, 0) = 0
[pid 1555] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1555] write(3, "1000", 4) = 4
[pid 1555] close(3) = 0
[pid 1555] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1555] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1555] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1555] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1556], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1556
[pid 1555] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1555] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1556 attached
<unfinished ...>
[pid 1556] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1556] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1556] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1555] <... futex resumed>) = 0
[pid 1555] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1555] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1556] <... futex resumed>) = 1
[pid 1556] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1556] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1555] <... futex resumed>) = 0
[pid 1556] <... futex resumed>) = 1
[pid 1555] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1556] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1555] <... futex resumed>) = 0
[pid 1555] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1556] <... mount resumed>) = 0
[pid 1556] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1555] <... futex resumed>) = 0
[pid 1555] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1555] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1555] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1556] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1555] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1555] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1556] <... umount2 resumed>) = 0
[pid 1555] <... clone resumed>, parent_tid=[1557], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1557
[pid 1556] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1555] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1555] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1557 attached
<unfinished ...>
[pid 1557] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1557] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1556] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1557] <... umount2 resumed>) = 0
[pid 1557] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1555] <... futex resumed>) = 0
[pid 1555] exit_group(0 <unfinished ...>
[pid 1557] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1555] <... exit_group resumed>) = ?
[pid 1557] <... futex resumed>) = ?
[pid 1556] <... futex resumed>) = ?
[pid 1556] +++ exited with 0 +++
[pid 1557] +++ exited with 0 +++
[pid 1555] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1555, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1558
./strace-static-x86_64: Process 1558 attached
[pid 1558] set_robust_list(0x5555560865e0, 24) = 0
[pid 1558] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1558] setpgid(0, 0) = 0
[pid 1558] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1558] write(3, "1000", 4) = 4
[pid 1558] close(3) = 0
[pid 1558] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1558] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1558] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1558] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1559], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1559
[pid 1558] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1558] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1559 attached
<unfinished ...>
[pid 1559] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1559] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1559] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1558] <... futex resumed>) = 0
[pid 1558] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1558] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1559] <... futex resumed>) = 1
[pid 1559] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1559] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1558] <... futex resumed>) = 0
[pid 1558] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1558] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1559] <... futex resumed>) = 1
[pid 1559] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1559] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1558] <... futex resumed>) = 0
[pid 1558] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1558] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1558] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1558] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1558] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1560], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1560
[pid 1558] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1558] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1559] <... futex resumed>) = 1
[pid 1559] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 1560 attached
) = 0
[pid 1559] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1560] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1559] <... futex resumed>) = 0
[pid 1560] <... set_robust_list resumed>) = 0
[pid 1559] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1560] umount2("./file0", MNT_DETACH) = 0
[pid 1560] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1558] <... futex resumed>) = 0
[pid 1560] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1558] exit_group(0 <unfinished ...>
[pid 1560] <... futex resumed>) = 231
[pid 1558] <... exit_group resumed>) = ?
[pid 1559] <... futex resumed>) = ?
[pid 1559] +++ exited with 0 +++
[pid 1560] +++ exited with 0 +++
[pid 1558] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1558, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1561
./strace-static-x86_64: Process 1561 attached
[pid 1561] set_robust_list(0x5555560865e0, 24) = 0
[pid 1561] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1561] setpgid(0, 0) = 0
[pid 1561] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1561] write(3, "1000", 4) = 4
[pid 1561] close(3) = 0
[pid 1561] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1561] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1561] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1561] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1562 attached
, parent_tid=[1562], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1562
[pid 1562] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1562] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1561] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1562] <... futex resumed>) = 0
[pid 1561] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1562] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1562] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1561] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1562] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1561] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1561] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1562] <... futex resumed>) = 0
[pid 1562] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1562] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1562] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1561] <... futex resumed>) = 0
[pid 1561] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1562] <... futex resumed>) = 0
[pid 1562] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1561] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1562] <... mount resumed>) = 0
[pid 1562] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1562] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1561] <... futex resumed>) = 0
[pid 1561] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1562] <... futex resumed>) = 0
[pid 1562] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1561] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1562] <... umount2 resumed>) = 0
[pid 1562] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1562] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1561] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1561] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1561] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1563 attached
, parent_tid=[1563], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1563
[pid 1563] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1563] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1561] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1561] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1563] <... umount2 resumed>) = 0
[pid 1563] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1563] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1561] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1561] exit_group(0 <unfinished ...>
[pid 1562] <... futex resumed>) = ?
[pid 1561] <... exit_group resumed>) = ?
[pid 1562] +++ exited with 0 +++
[pid 1563] <... futex resumed>) = ?
[pid 1563] +++ exited with 0 +++
[pid 1561] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1561, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1564
./strace-static-x86_64: Process 1564 attached
[pid 1564] set_robust_list(0x5555560865e0, 24) = 0
[pid 1564] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1564] setpgid(0, 0) = 0
[pid 1564] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1564] write(3, "1000", 4) = 4
[pid 1564] close(3) = 0
[pid 1564] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1564] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1564] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1564] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1565 attached
, parent_tid=[1565], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1565
[pid 1565] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1564] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1565] <... set_robust_list resumed>) = 0
[pid 1564] <... futex resumed>) = 0
[pid 1565] mkdir("./file0", 000 <unfinished ...>
[pid 1564] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1565] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1565] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1564] <... futex resumed>) = 0
[pid 1565] <... futex resumed>) = 1
[pid 1564] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1565] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1564] <... futex resumed>) = 0
[pid 1564] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1565] <... mount resumed>) = 0
[pid 1565] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1564] <... futex resumed>) = 0
[pid 1564] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1565] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1564] <... futex resumed>) = 0
[pid 1564] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1565] <... mount resumed>) = 0
[pid 1565] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1564] <... futex resumed>) = 0
[pid 1564] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1565] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1564] <... futex resumed>) = 0
[pid 1564] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1564] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1564] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1564] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1566 attached
<unfinished ...>
[pid 1566] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1564] <... clone resumed>, parent_tid=[1566], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1566
[pid 1565] <... umount2 resumed>) = 0
[pid 1564] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1566] <... set_robust_list resumed>) = 0
[pid 1565] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1564] <... futex resumed>) = 0
[pid 1566] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1565] <... futex resumed>) = 0
[pid 1564] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1565] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1566] <... umount2 resumed>) = 0
[pid 1566] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1564] <... futex resumed>) = 0
[pid 1566] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1564] exit_group(0) = ?
[pid 1566] <... futex resumed>) = ?
[pid 1565] <... futex resumed>) = ?
[pid 1566] +++ exited with 0 +++
[pid 1565] +++ exited with 0 +++
[pid 1564] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1564, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1567
./strace-static-x86_64: Process 1567 attached
[pid 1567] set_robust_list(0x5555560865e0, 24) = 0
[pid 1567] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1567] setpgid(0, 0) = 0
[pid 1567] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1567] write(3, "1000", 4) = 4
[pid 1567] close(3) = 0
[pid 1567] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1567] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1567] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1567] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1568 attached
<unfinished ...>
[pid 1568] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1568] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1567] <... clone resumed>, parent_tid=[1568], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1568
[pid 1567] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1568] <... futex resumed>) = 0
[pid 1567] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1568] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1568] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1568] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1567] <... futex resumed>) = 0
[pid 1567] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1568] <... futex resumed>) = 0
[pid 1567] <... futex resumed>) = 1
[pid 1568] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1567] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1568] <... mount resumed>) = 0
[pid 1568] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1567] <... futex resumed>) = 0
[pid 1567] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1567] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1568] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1568] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1567] <... futex resumed>) = 0
[pid 1567] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1567] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1567] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1567] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1567] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1568] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1567] <... clone resumed>, parent_tid=[1569], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1569
[pid 1568] <... umount2 resumed>) = 0
[pid 1567] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1567] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1569 attached
<unfinished ...>
[pid 1569] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1569] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1568] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1569] <... umount2 resumed>) = 0
[pid 1569] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1567] <... futex resumed>) = 0
[pid 1568] <... futex resumed>) = 0
[pid 1567] exit_group(0 <unfinished ...>
[pid 1568] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1567] <... exit_group resumed>) = ?
[pid 1568] <... futex resumed>) = ?
[pid 1569] <... futex resumed>) = ?
[pid 1569] +++ exited with 0 +++
[pid 1568] +++ exited with 0 +++
[pid 1567] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1567, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1570
./strace-static-x86_64: Process 1570 attached
[pid 1570] set_robust_list(0x5555560865e0, 24) = 0
[pid 1570] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1570] setpgid(0, 0) = 0
[pid 1570] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1570] write(3, "1000", 4) = 4
[pid 1570] close(3) = 0
[pid 1570] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1570] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1570] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1570] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1571 attached
<unfinished ...>
[pid 1571] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1571] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1570] <... clone resumed>, parent_tid=[1571], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1571
[pid 1570] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1571] <... futex resumed>) = 0
[pid 1570] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1571] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1571] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1571] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1570] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1570] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1571] <... futex resumed>) = 0
[pid 1571] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1570] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1571] <... mount resumed>) = 0
[pid 1571] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1570] <... futex resumed>) = 0
[pid 1570] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1571] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1570] <... futex resumed>) = 0
[pid 1570] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1571] <... mount resumed>) = 0
[pid 1571] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1571] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1570] <... futex resumed>) = 0
[pid 1570] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1570] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1570] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1570] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1571] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1570] <... mprotect resumed>) = 0
[pid 1571] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1570] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1572], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1572
[pid 1571] <... umount2 resumed>) = 0
[pid 1570] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1570] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1572 attached
<unfinished ...>
[pid 1572] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1571] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1572] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1571] <... futex resumed>) = 0
[pid 1572] <... umount2 resumed>) = 0
[pid 1572] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1570] <... futex resumed>) = 0
[pid 1571] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1570] exit_group(0 <unfinished ...>
[pid 1571] <... futex resumed>) = ?
[pid 1570] <... exit_group resumed>) = ?
[pid 1571] +++ exited with 0 +++
[pid 1572] <... futex resumed>) = ?
[pid 1572] +++ exited with 0 +++
[pid 1570] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1570, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1573
./strace-static-x86_64: Process 1573 attached
[pid 1573] set_robust_list(0x5555560865e0, 24) = 0
[pid 1573] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1573] setpgid(0, 0) = 0
[pid 1573] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1573] write(3, "1000", 4) = 4
[pid 1573] close(3) = 0
[pid 1573] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1573] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1573] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1573] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1574 attached
<unfinished ...>
[pid 1574] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1574] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1573] <... clone resumed>, parent_tid=[1574], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1574
[pid 1573] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1574] <... futex resumed>) = 0
[pid 1574] mkdir("./file0", 000 <unfinished ...>
[pid 1573] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1574] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1574] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1573] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1574] <... futex resumed>) = 0
[pid 1574] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1573] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1574] <... futex resumed>) = 0
[pid 1574] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1573] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1574] <... mount resumed>) = 0
[pid 1574] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1573] <... futex resumed>) = 0
[pid 1574] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1573] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1574] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1574] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1574] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1574] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1573] <... futex resumed>) = 1
[pid 1573] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1573] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1573] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1573] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1573] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1573] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1575], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1575
[pid 1573] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1573] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1574] <... futex resumed>) = 0
[pid 1574] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 1575 attached
) = 0
[pid 1574] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1574] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1575] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1575] umount2("./file0", MNT_DETACH) = 0
[pid 1575] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1573] <... futex resumed>) = 0
[pid 1573] exit_group(0) = ?
[pid 1574] <... futex resumed>) = ?
[pid 1574] +++ exited with 0 +++
[pid 1575] <... futex resumed>) = ?
[pid 1575] +++ exited with 0 +++
[pid 1573] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1573, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1576
./strace-static-x86_64: Process 1576 attached
[pid 1576] set_robust_list(0x5555560865e0, 24) = 0
[pid 1576] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1576] setpgid(0, 0) = 0
[pid 1576] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1576] write(3, "1000", 4) = 4
[pid 1576] close(3) = 0
[pid 1576] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1576] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1576] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1576] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1577], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1577
[pid 1576] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1576] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1577 attached
<unfinished ...>
[pid 1577] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1577] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1577] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1576] <... futex resumed>) = 0
[pid 1576] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1576] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1577] <... futex resumed>) = 1
[pid 1577] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1577] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1576] <... futex resumed>) = 0
[pid 1576] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1576] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1577] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1577] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1576] <... futex resumed>) = 0
[pid 1577] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1576] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1577] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1576] <... futex resumed>) = 0
[pid 1577] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1576] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1576] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1576] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1576] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1577] <... umount2 resumed>) = 0
[pid 1577] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1576] <... clone resumed>, parent_tid=[1578], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1578
[pid 1577] <... futex resumed>) = 0
[pid 1576] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1577] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1576] <... futex resumed>) = 0
[pid 1576] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1578 attached
<unfinished ...>
[pid 1578] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1578] umount2("./file0", MNT_DETACH) = 0
[pid 1578] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1576] <... futex resumed>) = 0
[pid 1578] <... futex resumed>) = 1
[pid 1576] exit_group(0 <unfinished ...>
[pid 1578] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1576] <... exit_group resumed>) = ?
[pid 1577] <... futex resumed>) = ?
[pid 1577] +++ exited with 0 +++
[pid 1578] <... futex resumed>) = ?
[pid 1578] +++ exited with 0 +++
[pid 1576] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1576, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1579 attached
<unfinished ...>
[pid 1579] set_robust_list(0x5555560865e0, 24 <unfinished ...>
[pid 371] <... clone resumed>, child_tidptr=0x5555560865d0) = 1579
[pid 1579] <... set_robust_list resumed>) = 0
[pid 1579] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1579] setpgid(0, 0) = 0
[pid 1579] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1579] write(3, "1000", 4) = 4
[pid 1579] close(3) = 0
[pid 1579] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1579] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1579] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1579] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1580 attached
, parent_tid=[1580], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1580
[pid 1580] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1579] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1580] <... set_robust_list resumed>) = 0
[pid 1579] <... futex resumed>) = 0
[pid 1580] mkdir("./file0", 000 <unfinished ...>
[pid 1579] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1580] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1580] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1579] <... futex resumed>) = 0
[pid 1580] <... futex resumed>) = 1
[pid 1579] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1580] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1579] <... futex resumed>) = 0
[pid 1579] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1580] <... mount resumed>) = 0
[pid 1580] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1579] <... futex resumed>) = 0
[pid 1580] <... futex resumed>) = 1
[pid 1579] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1580] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1579] <... futex resumed>) = 0
[pid 1579] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1580] <... mount resumed>) = 0
[pid 1580] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1579] <... futex resumed>) = 0
[pid 1580] <... futex resumed>) = 1
[pid 1579] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1580] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1579] <... futex resumed>) = 0
[pid 1579] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1579] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1580] <... umount2 resumed>) = 0
[pid 1579] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1579] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1581 attached
<unfinished ...>
[pid 1581] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1579] <... clone resumed>, parent_tid=[1581], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1581
[pid 1581] <... set_robust_list resumed>) = 0
[pid 1579] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1581] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1579] <... futex resumed>) = 0
[pid 1579] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1581] <... umount2 resumed>) = 0
[pid 1581] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1579] <... futex resumed>) = 0
[pid 1581] <... futex resumed>) = 1
[pid 1580] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1581] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1580] <... futex resumed>) = 0
[pid 1580] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1579] exit_group(0) = ?
[pid 1581] <... futex resumed>) = ?
[pid 1581] +++ exited with 0 +++
[pid 1580] <... futex resumed>) = ?
[pid 1580] +++ exited with 0 +++
[pid 1579] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1579, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1582
./strace-static-x86_64: Process 1582 attached
[pid 1582] set_robust_list(0x5555560865e0, 24) = 0
[pid 1582] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1582] setpgid(0, 0) = 0
[pid 1582] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1582] write(3, "1000", 4) = 4
[pid 1582] close(3) = 0
[pid 1582] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1582] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1582] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1582] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1583 attached
, parent_tid=[1583], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1583
[pid 1583] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1583] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1582] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1583] <... futex resumed>) = 0
[pid 1582] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1583] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1583] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1583] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1582] <... futex resumed>) = 0
[pid 1582] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1583] <... futex resumed>) = 0
[pid 1582] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1583] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1583] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1583] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1582] <... futex resumed>) = 0
[pid 1582] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1583] <... futex resumed>) = 0
[pid 1582] <... futex resumed>) = 1
[pid 1583] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1582] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1583] <... mount resumed>) = 0
[pid 1583] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1582] <... futex resumed>) = 0
[pid 1583] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1582] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1582] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1582] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1582] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1582] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1583] <... umount2 resumed>) = 0
[pid 1583] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1582] <... clone resumed>, parent_tid=[1584], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1584
[pid 1583] <... futex resumed>) = 0
[pid 1582] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1583] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1582] <... futex resumed>) = 0
[pid 1582] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1584 attached
<unfinished ...>
[pid 1584] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1584] umount2("./file0", MNT_DETACH) = 0
[pid 1584] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1582] <... futex resumed>) = 0
[pid 1584] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1582] exit_group(0) = ?
[pid 1583] <... futex resumed>) = ?
[pid 1583] +++ exited with 0 +++
[pid 1584] <... futex resumed>) = ?
[pid 1584] +++ exited with 0 +++
[pid 1582] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1582, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1585
./strace-static-x86_64: Process 1585 attached
[pid 1585] set_robust_list(0x5555560865e0, 24) = 0
[pid 1585] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1585] setpgid(0, 0) = 0
[pid 1585] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1585] write(3, "1000", 4) = 4
[pid 1585] close(3) = 0
[pid 1585] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1585] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1585] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1585] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1586 attached
<unfinished ...>
[pid 1586] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1586] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1585] <... clone resumed>, parent_tid=[1586], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1586
[pid 1585] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1586] <... futex resumed>) = 0
[pid 1585] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1586] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1586] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1586] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1585] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1585] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1586] <... futex resumed>) = 0
[pid 1586] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1585] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1586] <... mount resumed>) = 0
[pid 1586] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1586] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1585] <... futex resumed>) = 0
[pid 1585] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1585] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1586] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1586] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1586] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1585] <... futex resumed>) = 0
[pid 1586] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1585] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1586] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1585] <... futex resumed>) = 0
[pid 1585] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1585] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1585] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1586] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1585] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1587], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1587
[pid 1585] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1586] <... umount2 resumed>) = 0
[pid 1585] <... futex resumed>) = 0
[pid 1586] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1585] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1587 attached
<unfinished ...>
[pid 1586] <... futex resumed>) = 0
[pid 1587] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1586] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1587] <... set_robust_list resumed>) = 0
[pid 1587] umount2("./file0", MNT_DETACH) = 0
[pid 1587] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1585] <... futex resumed>) = 0
[pid 1585] exit_group(0) = ?
[pid 1586] <... futex resumed>) = ?
[pid 1586] +++ exited with 0 +++
[pid 1587] +++ exited with 0 +++
[pid 1585] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1585, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1588
./strace-static-x86_64: Process 1588 attached
[pid 1588] set_robust_list(0x5555560865e0, 24) = 0
[pid 1588] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1588] setpgid(0, 0) = 0
[pid 1588] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1588] write(3, "1000", 4) = 4
[pid 1588] close(3) = 0
[pid 1588] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1588] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1588] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1588] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1589 attached
<unfinished ...>
[pid 1589] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1588] <... clone resumed>, parent_tid=[1589], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1589
[pid 1589] <... set_robust_list resumed>) = 0
[pid 1588] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1589] mkdir("./file0", 000 <unfinished ...>
[pid 1588] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1589] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1589] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1588] <... futex resumed>) = 0
[pid 1589] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1588] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1588] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1589] <... mount resumed>) = 0
[pid 1589] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1588] <... futex resumed>) = 0
[pid 1589] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1588] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1588] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1589] <... mount resumed>) = 0
[pid 1589] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1588] <... futex resumed>) = 0
[pid 1589] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1588] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1588] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1588] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1588] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1589] <... umount2 resumed>) = 0
[pid 1589] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1588] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1589] <... futex resumed>) = 0
./strace-static-x86_64: Process 1590 attached
[pid 1590] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1590] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1589] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1588] <... clone resumed>, parent_tid=[1590], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1590
[pid 1588] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1590] <... futex resumed>) = 0
[pid 1588] <... futex resumed>) = 1
[pid 1590] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1588] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1590] <... umount2 resumed>) = 0
[pid 1590] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1590] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1588] <... futex resumed>) = 0
[pid 1588] exit_group(0) = ?
[pid 1589] <... futex resumed>) = -1 (errno 18446744073709551555)
[pid 1590] <... futex resumed>) = ?
[pid 1590] +++ exited with 0 +++
[pid 1589] +++ exited with 0 +++
[pid 1588] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1588, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1591
./strace-static-x86_64: Process 1591 attached
[pid 1591] set_robust_list(0x5555560865e0, 24) = 0
[pid 1591] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1591] setpgid(0, 0) = 0
[pid 1591] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1591] write(3, "1000", 4) = 4
[pid 1591] close(3) = 0
[pid 1591] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1591] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1591] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1591] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1592 attached
, parent_tid=[1592], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1592
[pid 1592] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1591] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1592] <... set_robust_list resumed>) = 0
[pid 1591] <... futex resumed>) = 0
[pid 1591] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1592] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1592] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1591] <... futex resumed>) = 0
[pid 1591] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1591] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1592] <... futex resumed>) = 1
[pid 1592] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1592] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1591] <... futex resumed>) = 0
[pid 1591] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1591] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1592] <... futex resumed>) = 1
[pid 1592] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1592] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1591] <... futex resumed>) = 0
[pid 1591] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1591] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1591] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1591] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1591] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1593 attached
, parent_tid=[1593], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1593
[pid 1591] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1591] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1592] <... futex resumed>) = 1
[pid 1592] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1593] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1593] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1592] <... umount2 resumed>) = 0
[pid 1592] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1592] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1593] <... umount2 resumed>) = 0
[pid 1593] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1591] <... futex resumed>) = 0
[pid 1593] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1591] exit_group(0) = ?
[pid 1592] <... futex resumed>) = ?
[pid 1592] +++ exited with 0 +++
[pid 1593] <... futex resumed>) = ?
[pid 1593] +++ exited with 0 +++
[pid 1591] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1591, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1594
./strace-static-x86_64: Process 1594 attached
[pid 1594] set_robust_list(0x5555560865e0, 24) = 0
[pid 1594] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1594] setpgid(0, 0) = 0
[pid 1594] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1594] write(3, "1000", 4) = 4
[pid 1594] close(3) = 0
[pid 1594] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1594] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1594] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1594] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1595 attached
<unfinished ...>
[pid 1595] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1595] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1594] <... clone resumed>, parent_tid=[1595], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1595
[pid 1594] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1595] <... futex resumed>) = 0
[pid 1595] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1594] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1595] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1595] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1594] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1594] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1595] <... futex resumed>) = 0
[pid 1595] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1594] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1595] <... mount resumed>) = 0
[pid 1595] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1595] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1594] <... futex resumed>) = 0
[pid 1594] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1595] <... futex resumed>) = 0
[pid 1594] <... futex resumed>) = 1
[pid 1595] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1594] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1595] <... mount resumed>) = 0
[pid 1595] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1595] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1594] <... futex resumed>) = 0
[pid 1594] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1595] <... futex resumed>) = 0
[pid 1595] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1594] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1594] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1595] <... umount2 resumed>) = 0
[pid 1595] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1595] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1594] <... mmap resumed>) = 0x7f236e446000
[pid 1594] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1594] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1596 attached
, parent_tid=[1596], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1596
[pid 1596] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1596] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1594] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1596] <... futex resumed>) = 0
[pid 1596] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1594] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1596] <... umount2 resumed>) = 0
[pid 1596] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1596] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1594] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1594] exit_group(0 <unfinished ...>
[pid 1595] <... futex resumed>) = ?
[pid 1594] <... exit_group resumed>) = ?
[pid 1595] +++ exited with 0 +++
[pid 1596] <... futex resumed>) = ?
[pid 1596] +++ exited with 0 +++
[pid 1594] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1594, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1597
./strace-static-x86_64: Process 1597 attached
[pid 1597] set_robust_list(0x5555560865e0, 24) = 0
[pid 1597] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1597] setpgid(0, 0) = 0
[pid 1597] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1597] write(3, "1000", 4) = 4
[pid 1597] close(3) = 0
[pid 1597] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1597] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1597] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1597] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1598 attached
, parent_tid=[1598], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1598
[pid 1597] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1598] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1597] <... futex resumed>) = 0
[pid 1598] <... set_robust_list resumed>) = 0
[pid 1597] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1598] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1598] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1597] <... futex resumed>) = 0
[pid 1598] <... futex resumed>) = 1
[pid 1597] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1598] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1597] <... futex resumed>) = 0
[pid 1597] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1598] <... mount resumed>) = 0
[pid 1598] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1597] <... futex resumed>) = 0
[pid 1597] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1597] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1598] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1598] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1597] <... futex resumed>) = 0
[pid 1597] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1597] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1597] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1597] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1598] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1597] <... mprotect resumed>) = 0
[pid 1597] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1598] <... umount2 resumed>) = 0
[pid 1597] <... clone resumed>, parent_tid=[1599], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1599
[pid 1597] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1597] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1599 attached
<unfinished ...>
[pid 1599] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1599] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1598] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1599] <... umount2 resumed>) = 0
[pid 1599] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1597] <... futex resumed>) = 0
[pid 1597] exit_group(0) = ?
[pid 1598] <... futex resumed>) = ?
[pid 1598] +++ exited with 0 +++
[pid 1599] <... futex resumed>) = ?
[pid 1599] +++ exited with 0 +++
[pid 1597] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1597, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1600
./strace-static-x86_64: Process 1600 attached
[pid 1600] set_robust_list(0x5555560865e0, 24) = 0
[pid 1600] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1600] setpgid(0, 0) = 0
[pid 1600] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1600] write(3, "1000", 4) = 4
[pid 1600] close(3) = 0
[pid 1600] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1600] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1600] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1600] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1601 attached
, parent_tid=[1601], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1601
[pid 1601] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1601] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1600] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1601] <... futex resumed>) = 0
[pid 1601] mkdir("./file0", 000 <unfinished ...>
[pid 1600] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1601] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1601] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1601] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1600] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1600] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1600] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1601] <... futex resumed>) = 0
[pid 1601] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1601] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1600] <... futex resumed>) = 0
[pid 1601] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1600] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1601] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1600] <... futex resumed>) = 0
[pid 1601] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1600] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1601] <... mount resumed>) = 0
[pid 1601] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1600] <... futex resumed>) = 0
[pid 1601] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1600] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1601] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1600] <... futex resumed>) = 0
[pid 1601] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1600] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1600] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1601] <... umount2 resumed>) = 0
[pid 1600] <... mmap resumed>) = 0x7f236e446000
[pid 1600] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1601] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1600] <... mprotect resumed>) = 0
[pid 1601] <... futex resumed>) = 0
[pid 1600] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1601] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1602 attached
<unfinished ...>
[pid 1600] <... clone resumed>, parent_tid=[1602], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1602
[pid 1600] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1600] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1602] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1602] umount2("./file0", MNT_DETACH) = 0
[pid 1602] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1600] <... futex resumed>) = 0
[pid 1600] exit_group(0 <unfinished ...>
[pid 1601] <... futex resumed>) = ?
[pid 1600] <... exit_group resumed>) = ?
[pid 1601] +++ exited with 0 +++
[pid 1602] +++ exited with 0 +++
[pid 1600] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1600, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1603
./strace-static-x86_64: Process 1603 attached
[pid 1603] set_robust_list(0x5555560865e0, 24) = 0
[pid 1603] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1603] setpgid(0, 0) = 0
[pid 1603] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1603] write(3, "1000", 4) = 4
[pid 1603] close(3) = 0
[pid 1603] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1603] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1603] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1603] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1604], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1604
[pid 1603] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1603] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1604 attached
<unfinished ...>
[pid 1604] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1604] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1604] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1603] <... futex resumed>) = 0
[pid 1603] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1603] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1604] <... futex resumed>) = 1
[pid 1604] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1604] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1603] <... futex resumed>) = 0
[pid 1604] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1603] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1603] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1604] <... mount resumed>) = 0
[pid 1604] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1603] <... futex resumed>) = 0
[pid 1603] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1603] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1603] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1603] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1604] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1603] <... mprotect resumed>) = 0
[pid 1603] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1604] <... umount2 resumed>) = 0
[pid 1603] <... clone resumed>, parent_tid=[1605], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1605
[pid 1603] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1604] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1603] <... futex resumed>) = 0
[pid 1604] <... futex resumed>) = 0
[pid 1603] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1605 attached
<unfinished ...>
[pid 1605] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1605] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1604] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1605] <... umount2 resumed>) = 0
[pid 1605] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1603] <... futex resumed>) = 0
[pid 1605] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1603] exit_group(0) = ?
[pid 1604] <... futex resumed>) = ?
[pid 1604] +++ exited with 0 +++
[pid 1605] <... futex resumed>) = ?
[pid 1605] +++ exited with 0 +++
[pid 1603] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1603, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1606
./strace-static-x86_64: Process 1606 attached
[pid 1606] set_robust_list(0x5555560865e0, 24) = 0
[pid 1606] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1606] setpgid(0, 0) = 0
[pid 1606] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1606] write(3, "1000", 4) = 4
[pid 1606] close(3) = 0
[pid 1606] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1606] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1606] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1606] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1607 attached
, parent_tid=[1607], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1607
[pid 1607] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1606] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1607] <... set_robust_list resumed>) = 0
[pid 1606] <... futex resumed>) = 0
[pid 1606] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1607] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1607] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1606] <... futex resumed>) = 0
[pid 1607] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1606] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1606] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1607] <... mount resumed>) = 0
[pid 1607] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1606] <... futex resumed>) = 0
[pid 1607] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1606] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1607] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1606] <... futex resumed>) = 0
[pid 1607] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1606] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1607] <... mount resumed>) = 0
[pid 1607] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1606] <... futex resumed>) = 0
[pid 1607] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1606] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1606] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1606] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1606] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1607] <... umount2 resumed>) = 0
[pid 1606] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1607] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1608 attached
) = 0
[pid 1608] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1607] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1606] <... clone resumed>, parent_tid=[1608], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1608
[pid 1608] <... set_robust_list resumed>) = 0
[pid 1606] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1608] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1606] <... futex resumed>) = 0
[pid 1606] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1608] <... umount2 resumed>) = 0
[pid 1608] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1606] <... futex resumed>) = 0
[pid 1608] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1606] exit_group(0) = ?
[pid 1607] <... futex resumed>) = ?
[pid 1608] <... futex resumed>) = ?
[pid 1607] +++ exited with 0 +++
[pid 1608] +++ exited with 0 +++
[pid 1606] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1606, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1609
./strace-static-x86_64: Process 1609 attached
[pid 1609] set_robust_list(0x5555560865e0, 24) = 0
[pid 1609] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1609] setpgid(0, 0) = 0
[pid 1609] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1609] write(3, "1000", 4) = 4
[pid 1609] close(3) = 0
[pid 1609] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1609] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1609] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1609] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1610 attached
, parent_tid=[1610], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1610
[pid 1610] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1609] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1610] <... set_robust_list resumed>) = 0
[pid 1609] <... futex resumed>) = 0
[pid 1609] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1610] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1610] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1609] <... futex resumed>) = 0
[pid 1610] <... futex resumed>) = 1
[pid 1609] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1610] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1609] <... futex resumed>) = 0
[pid 1609] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1610] <... mount resumed>) = 0
[pid 1610] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1609] <... futex resumed>) = 0
[pid 1610] <... futex resumed>) = 1
[pid 1609] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1610] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1609] <... futex resumed>) = 0
[pid 1609] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1610] <... mount resumed>) = 0
[pid 1610] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1609] <... futex resumed>) = 0
[pid 1609] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1610] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1609] <... futex resumed>) = 0
[pid 1609] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1609] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1609] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1609] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1610] <... umount2 resumed>) = 0
[pid 1610] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1611 attached
) = 0
[pid 1609] <... clone resumed>, parent_tid=[1611], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1611
[pid 1611] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1609] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1610] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1609] <... futex resumed>) = 0
[pid 1609] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1611] <... set_robust_list resumed>) = 0
[pid 1611] umount2("./file0", MNT_DETACH) = 0
[pid 1611] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1609] <... futex resumed>) = 0
[pid 1611] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1609] exit_group(0) = ?
[pid 1611] <... futex resumed>) = ?
[pid 1610] <... futex resumed>) = ?
[pid 1611] +++ exited with 0 +++
[pid 1610] +++ exited with 0 +++
[pid 1609] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1609, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1612
./strace-static-x86_64: Process 1612 attached
[pid 1612] set_robust_list(0x5555560865e0, 24) = 0
[pid 1612] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1612] setpgid(0, 0) = 0
[pid 1612] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1612] write(3, "1000", 4) = 4
[pid 1612] close(3) = 0
[pid 1612] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1612] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1612] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1612] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1613 attached
, parent_tid=[1613], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1613
[pid 1613] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1612] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1613] <... set_robust_list resumed>) = 0
[pid 1612] <... futex resumed>) = 0
[pid 1612] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1613] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1613] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1612] <... futex resumed>) = 0
[pid 1613] <... futex resumed>) = 1
[pid 1612] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1613] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1612] <... futex resumed>) = 0
[pid 1612] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1613] <... mount resumed>) = 0
[pid 1613] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1612] <... futex resumed>) = 0
[pid 1613] <... futex resumed>) = 1
[pid 1612] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1613] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1612] <... futex resumed>) = 0
[pid 1612] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1613] <... mount resumed>) = 0
[pid 1613] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1612] <... futex resumed>) = 0
[pid 1613] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1612] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1612] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1612] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1612] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1612] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1613] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 1614 attached
[pid 1613] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1614] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1613] <... futex resumed>) = 0
[pid 1612] <... clone resumed>, parent_tid=[1614], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1614
[pid 1613] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1612] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1614] <... set_robust_list resumed>) = 0
[pid 1612] <... futex resumed>) = 0
[pid 1614] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1612] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1614] <... umount2 resumed>) = 0
[pid 1614] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1612] <... futex resumed>) = 0
[pid 1614] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1612] exit_group(0) = ?
[pid 1613] <... futex resumed>) = ?
[pid 1613] +++ exited with 0 +++
[pid 1614] <... futex resumed>) = ?
[pid 1614] +++ exited with 0 +++
[pid 1612] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1612, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1615
./strace-static-x86_64: Process 1615 attached
[pid 1615] set_robust_list(0x5555560865e0, 24) = 0
[pid 1615] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1615] setpgid(0, 0) = 0
[pid 1615] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1615] write(3, "1000", 4) = 4
[pid 1615] close(3) = 0
[pid 1615] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1615] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1615] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1615] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1616 attached
, parent_tid=[1616], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1616
[pid 1616] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1615] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1616] <... set_robust_list resumed>) = 0
[pid 1615] <... futex resumed>) = 0
[pid 1615] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1616] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1616] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1615] <... futex resumed>) = 0
[pid 1616] <... futex resumed>) = 1
[pid 1615] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1616] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1615] <... futex resumed>) = 0
[pid 1615] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1616] <... mount resumed>) = 0
[pid 1616] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1615] <... futex resumed>) = 0
[pid 1616] <... futex resumed>) = 1
[pid 1615] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1616] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1615] <... futex resumed>) = 0
[pid 1615] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1616] <... mount resumed>) = 0
[pid 1616] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1615] <... futex resumed>) = 0
[pid 1616] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1615] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1616] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1615] <... futex resumed>) = 0
[pid 1616] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1615] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1615] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1615] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1616] <... umount2 resumed>) = 0
[pid 1616] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1615] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1616] <... futex resumed>) = 0
[pid 1616] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1617 attached
<unfinished ...>
[pid 1615] <... clone resumed>, parent_tid=[1617], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1617
[pid 1617] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1615] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1617] <... set_robust_list resumed>) = 0
[pid 1615] <... futex resumed>) = 0
[pid 1617] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1615] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1617] <... umount2 resumed>) = 0
[pid 1617] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1615] <... futex resumed>) = 0
[pid 1617] <... futex resumed>) = 1
[pid 1615] exit_group(0 <unfinished ...>
[pid 1617] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1615] <... exit_group resumed>) = ?
[pid 1616] <... futex resumed>) = -1 (errno 18446744073709551414)
[pid 1617] <... futex resumed>) = ?
[pid 1616] +++ exited with 0 +++
[pid 1617] +++ exited with 0 +++
[pid 1615] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1615, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1618
./strace-static-x86_64: Process 1618 attached
[pid 1618] set_robust_list(0x5555560865e0, 24) = 0
[pid 1618] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1618] setpgid(0, 0) = 0
[pid 1618] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1618] write(3, "1000", 4) = 4
[pid 1618] close(3) = 0
[pid 1618] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1618] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1618] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1618] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1619 attached
, parent_tid=[1619], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1619
[pid 1619] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1619] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1618] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1619] <... futex resumed>) = 0
[pid 1619] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1619] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1619] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1618] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1618] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1619] <... futex resumed>) = 0
[pid 1619] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1618] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1619] <... mount resumed>) = 0
[pid 1619] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1619] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1618] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1618] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1619] <... futex resumed>) = 0
[pid 1619] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1618] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1619] <... mount resumed>) = 0
[pid 1619] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1619] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1618] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1618] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1619] <... futex resumed>) = 0
[pid 1619] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1618] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1619] <... umount2 resumed>) = 0
[pid 1619] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1619] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1618] <... futex resumed>) = 0
[pid 1618] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1618] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1618] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1620 attached
<unfinished ...>
[pid 1620] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1618] <... clone resumed>, parent_tid=[1620], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1620
[pid 1620] <... set_robust_list resumed>) = 0
[pid 1620] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1618] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1620] <... futex resumed>) = 0
[pid 1620] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1618] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1620] <... umount2 resumed>) = 0
[pid 1620] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1620] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1618] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1618] exit_group(0 <unfinished ...>
[pid 1619] <... futex resumed>) = ?
[pid 1618] <... exit_group resumed>) = ?
[pid 1619] +++ exited with 0 +++
[pid 1620] <... futex resumed>) = ?
[pid 1620] +++ exited with 0 +++
[pid 1618] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1618, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1621
./strace-static-x86_64: Process 1621 attached
[pid 1621] set_robust_list(0x5555560865e0, 24) = 0
[pid 1621] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1621] setpgid(0, 0) = 0
[pid 1621] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1621] write(3, "1000", 4) = 4
[pid 1621] close(3) = 0
[pid 1621] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1621] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1621] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1621] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1622], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1622
[pid 1621] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1621] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1622 attached
<unfinished ...>
[pid 1622] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1622] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1622] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1621] <... futex resumed>) = 0
[pid 1621] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1621] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1622] <... futex resumed>) = 1
[pid 1622] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1622] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1621] <... futex resumed>) = 0
[pid 1621] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1621] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1622] <... futex resumed>) = 1
[pid 1622] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1622] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1621] <... futex resumed>) = 0
[pid 1622] <... futex resumed>) = 1
[pid 1621] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1622] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1621] <... futex resumed>) = 0
[pid 1621] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1622] <... umount2 resumed>) = 0
[pid 1621] <... futex resumed>) = 0
[pid 1621] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1622] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1621] <... mmap resumed>) = 0x7f236e446000
[pid 1621] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1622] <... futex resumed>) = 0
[pid 1622] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1621] <... mprotect resumed>) = 0
[pid 1621] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1623 attached
<unfinished ...>
[pid 1623] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1621] <... clone resumed>, parent_tid=[1623], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1623
[pid 1621] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1623] <... set_robust_list resumed>) = 0
[pid 1621] <... futex resumed>) = 0
[pid 1621] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1623] umount2("./file0", MNT_DETACH) = 0
[pid 1623] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1621] <... futex resumed>) = 0
[pid 1623] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1621] exit_group(0) = ?
[pid 1622] <... futex resumed>) = ?
[pid 1623] <... futex resumed>) = ?
[pid 1623] +++ exited with 0 +++
[pid 1622] +++ exited with 0 +++
[pid 1621] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1621, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1624
./strace-static-x86_64: Process 1624 attached
[pid 1624] set_robust_list(0x5555560865e0, 24) = 0
[pid 1624] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1624] setpgid(0, 0) = 0
[pid 1624] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1624] write(3, "1000", 4) = 4
[pid 1624] close(3) = 0
[pid 1624] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1624] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1624] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1624] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1625 attached
, parent_tid=[1625], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1625
[pid 1625] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1624] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1625] <... set_robust_list resumed>) = 0
[pid 1624] <... futex resumed>) = 0
[pid 1624] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1625] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1625] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1624] <... futex resumed>) = 0
[pid 1625] <... futex resumed>) = 1
[pid 1624] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1625] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1624] <... futex resumed>) = 0
[pid 1624] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1625] <... mount resumed>) = 0
[pid 1625] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1624] <... futex resumed>) = 0
[pid 1625] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1624] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1624] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1625] <... mount resumed>) = 0
[pid 1625] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1624] <... futex resumed>) = 0
[pid 1625] <... futex resumed>) = 1
[pid 1624] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1625] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1624] <... futex resumed>) = 0
[pid 1624] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1624] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1624] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1624] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1626 attached
, parent_tid=[1626], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1626
[pid 1625] <... umount2 resumed>) = 0
[pid 1624] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1626] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1625] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1624] <... futex resumed>) = 0
[pid 1626] <... set_robust_list resumed>) = 0
[pid 1625] <... futex resumed>) = 0
[pid 1624] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1626] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1625] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1626] <... umount2 resumed>) = 0
[pid 1626] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1624] <... futex resumed>) = 0
[pid 1626] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1624] exit_group(0) = ?
[pid 1625] <... futex resumed>) = ?
[pid 1625] +++ exited with 0 +++
[pid 1626] <... futex resumed>) = ?
[pid 1626] +++ exited with 0 +++
[pid 1624] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1624, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1627
./strace-static-x86_64: Process 1627 attached
[pid 1627] set_robust_list(0x5555560865e0, 24) = 0
[pid 1627] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1627] setpgid(0, 0) = 0
[pid 1627] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1627] write(3, "1000", 4) = 4
[pid 1627] close(3) = 0
[pid 1627] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1627] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1627] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1627] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1628 attached
, parent_tid=[1628], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1628
[pid 1628] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1627] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1628] <... set_robust_list resumed>) = 0
[pid 1627] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1628] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1628] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1627] <... futex resumed>) = 0
[pid 1628] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1627] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1628] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1627] <... futex resumed>) = 0
[pid 1628] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1627] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1628] <... mount resumed>) = 0
[pid 1628] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1627] <... futex resumed>) = 0
[pid 1628] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1627] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1628] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1627] <... futex resumed>) = 0
[pid 1628] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1627] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1628] <... mount resumed>) = 0
[pid 1628] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1627] <... futex resumed>) = 0
[pid 1628] <... futex resumed>) = 1
[pid 1627] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1628] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1627] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1627] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1627] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1627] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1629 attached
<unfinished ...>
[pid 1628] <... umount2 resumed>) = 0
[pid 1628] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1627] <... clone resumed>, parent_tid=[1629], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1629
[pid 1629] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1627] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1628] <... futex resumed>) = 0
[pid 1627] <... futex resumed>) = 0
[pid 1629] <... set_robust_list resumed>) = 0
[pid 1628] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1627] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1629] umount2("./file0", MNT_DETACH) = 0
[pid 1629] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1627] <... futex resumed>) = 0
[pid 1627] exit_group(0 <unfinished ...>
[pid 1629] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1627] <... exit_group resumed>) = ?
[pid 1628] <... futex resumed>) = ?
[pid 1628] +++ exited with 0 +++
[pid 1629] <... futex resumed>) = ?
[pid 1629] +++ exited with 0 +++
[pid 1627] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1627, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1630
./strace-static-x86_64: Process 1630 attached
[pid 1630] set_robust_list(0x5555560865e0, 24) = 0
[pid 1630] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1630] setpgid(0, 0) = 0
[pid 1630] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1630] write(3, "1000", 4) = 4
[pid 1630] close(3) = 0
[pid 1630] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1630] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1630] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1630] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1631], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1631
[pid 1630] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1630] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1631 attached
<unfinished ...>
[pid 1631] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1631] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1631] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1630] <... futex resumed>) = 0
[pid 1630] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1630] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1631] <... futex resumed>) = 1
[pid 1631] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1631] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1630] <... futex resumed>) = 0
[pid 1630] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1630] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1631] <... futex resumed>) = 1
[pid 1631] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1631] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1630] <... futex resumed>) = 0
[pid 1631] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1630] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1630] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1630] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1630] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1630] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1631] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 1632 attached
[pid 1631] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1630] <... clone resumed>, parent_tid=[1632], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1632
[pid 1632] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1631] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1632] <... set_robust_list resumed>) = 0
[pid 1630] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1632] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1630] <... futex resumed>) = 0
[pid 1630] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1632] <... umount2 resumed>) = 0
[pid 1632] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1630] <... futex resumed>) = 0
[pid 1632] <... futex resumed>) = 1
[pid 1632] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1630] exit_group(0) = ?
[pid 1631] <... futex resumed>) = ?
[pid 1631] +++ exited with 0 +++
[pid 1632] <... futex resumed>) = ?
[pid 1632] +++ exited with 0 +++
[pid 1630] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1630, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1633 attached
, child_tidptr=0x5555560865d0) = 1633
[pid 1633] set_robust_list(0x5555560865e0, 24) = 0
[pid 1633] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1633] setpgid(0, 0) = 0
[pid 1633] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1633] write(3, "1000", 4) = 4
[pid 1633] close(3) = 0
[pid 1633] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1633] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1633] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1633] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1634 attached
, parent_tid=[1634], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1634
[pid 1634] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1634] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1633] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1634] <... futex resumed>) = 0
[pid 1634] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1634] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1634] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1633] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1633] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1634] <... futex resumed>) = 0
[pid 1634] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1633] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1634] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1634] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1633] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1633] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1634] <... futex resumed>) = 0
[pid 1634] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1633] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1634] <... mount resumed>) = 0
[pid 1634] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1634] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1633] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1633] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1634] <... futex resumed>) = 0
[pid 1634] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1633] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1633] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1633] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1633] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1635 attached
<unfinished ...>
[pid 1634] <... umount2 resumed>) = 0
[pid 1635] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1633] <... clone resumed>, parent_tid=[1635], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1635
[pid 1635] <... set_robust_list resumed>) = 0
[pid 1634] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1633] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1635] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1634] <... futex resumed>) = 0
[pid 1633] <... futex resumed>) = 0
[pid 1633] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1635] <... umount2 resumed>) = 0
[pid 1634] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1635] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1633] <... futex resumed>) = 0
[pid 1635] <... futex resumed>) = 1
[pid 1633] exit_group(0 <unfinished ...>
[pid 1635] ????() = -1 (errno 18446744073709551555)
[pid 1634] <... futex resumed>) = ?
[pid 1633] <... exit_group resumed>) = ?
[pid 1635] +++ exited with 0 +++
[pid 1634] +++ exited with 0 +++
[pid 1633] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1633, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1636
./strace-static-x86_64: Process 1636 attached
[pid 1636] set_robust_list(0x5555560865e0, 24) = 0
[pid 1636] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1636] setpgid(0, 0) = 0
[pid 1636] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1636] write(3, "1000", 4) = 4
[pid 1636] close(3) = 0
[pid 1636] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1636] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1636] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1636] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1637], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1637
[pid 1636] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1636] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1637 attached
<unfinished ...>
[pid 1637] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1637] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1637] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1636] <... futex resumed>) = 0
[pid 1636] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1636] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1637] <... futex resumed>) = 1
[pid 1637] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1637] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1636] <... futex resumed>) = 0
[pid 1636] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1636] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1637] <... futex resumed>) = 1
[pid 1637] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1637] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1636] <... futex resumed>) = 0
[pid 1637] <... futex resumed>) = 1
[pid 1637] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1636] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1636] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1636] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1636] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1637] <... umount2 resumed>) = 0
[pid 1636] <... mprotect resumed>) = 0
[pid 1637] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1636] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1637] <... futex resumed>) = 0
[pid 1636] <... clone resumed>, parent_tid=[1638], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1638
[pid 1637] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1638 attached
<unfinished ...>
[pid 1636] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1638] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1636] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1638] <... set_robust_list resumed>) = 0
[pid 1638] umount2("./file0", MNT_DETACH) = 0
[pid 1638] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1636] <... futex resumed>) = 0
[pid 1638] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1636] exit_group(0) = ?
[pid 1637] <... futex resumed>) = ?
[pid 1637] +++ exited with 0 +++
[pid 1638] <... futex resumed>) = ?
[pid 1638] +++ exited with 0 +++
[pid 1636] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1636, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1639 attached
, child_tidptr=0x5555560865d0) = 1639
[pid 1639] set_robust_list(0x5555560865e0, 24) = 0
[pid 1639] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1639] setpgid(0, 0) = 0
[pid 1639] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1639] write(3, "1000", 4) = 4
[pid 1639] close(3) = 0
[pid 1639] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1639] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1639] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1639] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1640 attached
, parent_tid=[1640], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1640
[pid 1640] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1640] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1639] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1640] <... futex resumed>) = 0
[pid 1639] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1640] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1640] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1639] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1639] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1640] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1639] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1640] <... mount resumed>) = 0
[pid 1640] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1639] <... futex resumed>) = 0
[pid 1639] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1639] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1640] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1640] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1640] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1639] <... futex resumed>) = 0
[pid 1639] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1639] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1639] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1640] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1639] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1640] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1639] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1640] <... umount2 resumed>) = 0
[pid 1639] <... clone resumed>, parent_tid=[1641], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1641
[pid 1639] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1639] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1641 attached
<unfinished ...>
[pid 1641] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1641] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1640] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1641] <... umount2 resumed>) = 0
[pid 1641] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1640] <... futex resumed>) = 0
[pid 1639] <... futex resumed>) = 0
[pid 1640] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1639] exit_group(0) = ?
[pid 1640] <... futex resumed>) = ?
[pid 1640] +++ exited with 0 +++
[pid 1641] <... futex resumed>) = ?
[pid 1641] +++ exited with 0 +++
[pid 1639] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1639, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1642
./strace-static-x86_64: Process 1642 attached
[pid 1642] set_robust_list(0x5555560865e0, 24) = 0
[pid 1642] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1642] setpgid(0, 0) = 0
[pid 1642] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1642] write(3, "1000", 4) = 4
[pid 1642] close(3) = 0
[pid 1642] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1642] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1642] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1642] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1643], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1643
[pid 1642] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1642] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1643 attached
<unfinished ...>
[pid 1643] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1643] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1643] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1642] <... futex resumed>) = 0
[pid 1642] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1642] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1643] <... futex resumed>) = 1
[pid 1643] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1643] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1642] <... futex resumed>) = 0
[pid 1642] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1642] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1643] <... futex resumed>) = 1
[pid 1643] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1643] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1642] <... futex resumed>) = 0
[pid 1643] <... futex resumed>) = 1
[pid 1642] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1643] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1642] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1642] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1642] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1642] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1643] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 1644 attached
[pid 1643] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1644] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1643] <... futex resumed>) = 0
[pid 1642] <... clone resumed>, parent_tid=[1644], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1644
[pid 1644] <... set_robust_list resumed>) = 0
[pid 1643] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1642] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1644] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1642] <... futex resumed>) = 0
[pid 1642] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1644] <... umount2 resumed>) = 0
[pid 1644] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1642] <... futex resumed>) = 0
[pid 1642] exit_group(0 <unfinished ...>
[pid 1644] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1642] <... exit_group resumed>) = ?
[pid 1644] <... futex resumed>) = ?
[pid 1643] <... futex resumed>) = ?
[pid 1643] +++ exited with 0 +++
[pid 1644] +++ exited with 0 +++
[pid 1642] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1642, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1645
./strace-static-x86_64: Process 1645 attached
[pid 1645] set_robust_list(0x5555560865e0, 24) = 0
[pid 1645] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1645] setpgid(0, 0) = 0
[pid 1645] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1645] write(3, "1000", 4) = 4
[pid 1645] close(3) = 0
[pid 1645] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1645] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1645] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1645] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1646 attached
, parent_tid=[1646], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1646
[pid 1645] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1646] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1646] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1646] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1645] <... futex resumed>) = 0
[pid 1646] <... futex resumed>) = 0
[pid 1645] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1646] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1645] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1645] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1646] <... futex resumed>) = 0
[pid 1645] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1646] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1646] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1646] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1645] <... futex resumed>) = 0
[pid 1645] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1646] <... futex resumed>) = 0
[pid 1645] <... futex resumed>) = 1
[pid 1646] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1645] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1646] <... mount resumed>) = 0
[pid 1646] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1645] <... futex resumed>) = 0
[pid 1646] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1645] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1645] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1645] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1645] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1645] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1646] <... umount2 resumed>) = 0
[pid 1646] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1645] <... clone resumed>, parent_tid=[1647], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1647
[pid 1646] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1645] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 1647 attached
[pid 1645] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1647] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1647] umount2("./file0", MNT_DETACH) = 0
[pid 1647] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1645] <... futex resumed>) = 0
[pid 1647] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1645] exit_group(0 <unfinished ...>
[pid 1647] <... futex resumed>) = 231
[pid 1645] <... exit_group resumed>) = ?
[pid 1647] +++ exited with 0 +++
[pid 1646] <... futex resumed>) = ?
[pid 1646] +++ exited with 0 +++
[pid 1645] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1645, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1648
./strace-static-x86_64: Process 1648 attached
[pid 1648] set_robust_list(0x5555560865e0, 24) = 0
[pid 1648] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1648] setpgid(0, 0) = 0
[pid 1648] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1648] write(3, "1000", 4) = 4
[pid 1648] close(3) = 0
[pid 1648] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1648] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1648] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1648] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1649 attached
, parent_tid=[1649], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1649
[pid 1649] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1649] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1648] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1649] <... futex resumed>) = 0
[pid 1649] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1648] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1649] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1648] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1649] <... futex resumed>) = 0
[pid 1649] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1648] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1649] <... futex resumed>) = 0
[pid 1648] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1649] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1649] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1649] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1648] <... futex resumed>) = 0
[pid 1648] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1649] <... futex resumed>) = 0
[pid 1649] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1648] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1649] <... mount resumed>) = 0
[pid 1649] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1649] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1648] <... futex resumed>) = 0
[pid 1648] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1649] <... futex resumed>) = 0
[pid 1649] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1648] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1649] <... umount2 resumed>) = 0
[pid 1649] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1649] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1648] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1648] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1648] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1650 attached
, parent_tid=[1650], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1650
[pid 1650] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1650] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1648] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1650] <... futex resumed>) = 0
[pid 1650] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1648] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1650] <... umount2 resumed>) = 0
[pid 1650] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1648] <... futex resumed>) = 0
[pid 1648] exit_group(0 <unfinished ...>
[pid 1650] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1649] <... futex resumed>) = ?
[pid 1648] <... exit_group resumed>) = ?
[pid 1650] <... futex resumed>) = ?
[pid 1649] +++ exited with 0 +++
[pid 1650] +++ exited with 0 +++
[pid 1648] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1648, si_uid=0, si_status=0, si_utime=0, si_stime=1} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1651
./strace-static-x86_64: Process 1651 attached
[pid 1651] set_robust_list(0x5555560865e0, 24) = 0
[pid 1651] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1651] setpgid(0, 0) = 0
[pid 1651] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1651] write(3, "1000", 4) = 4
[pid 1651] close(3) = 0
[pid 1651] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1651] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1651] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1651] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1652 attached
, parent_tid=[1652], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1652
[pid 1652] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1651] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1652] <... set_robust_list resumed>) = 0
[pid 1651] <... futex resumed>) = 0
[pid 1651] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1652] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1652] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1651] <... futex resumed>) = 0
[pid 1651] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1652] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1651] <... futex resumed>) = 0
[pid 1651] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1652] <... mount resumed>) = 0
[pid 1652] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1651] <... futex resumed>) = 0
[pid 1651] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1652] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1651] <... futex resumed>) = 0
[pid 1651] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1652] <... mount resumed>) = 0
[pid 1652] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1651] <... futex resumed>) = 0
[pid 1651] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1652] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1651] <... futex resumed>) = 0
[pid 1651] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1651] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1651] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1651] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1653 attached
<unfinished ...>
[pid 1652] <... umount2 resumed>) = 0
[pid 1651] <... clone resumed>, parent_tid=[1653], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1653
[pid 1653] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1652] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1651] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1653] <... set_robust_list resumed>) = 0
[pid 1652] <... futex resumed>) = 0
[pid 1651] <... futex resumed>) = 0
[pid 1653] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1652] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1651] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1653] <... umount2 resumed>) = 0
[pid 1653] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1651] <... futex resumed>) = 0
[pid 1653] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1651] exit_group(0) = ?
[pid 1652] <... futex resumed>) = ?
[pid 1653] <... futex resumed>) = ?
[pid 1653] +++ exited with 0 +++
[pid 1652] +++ exited with 0 +++
[pid 1651] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1651, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1654
./strace-static-x86_64: Process 1654 attached
[pid 1654] set_robust_list(0x5555560865e0, 24) = 0
[pid 1654] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1654] setpgid(0, 0) = 0
[pid 1654] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1654] write(3, "1000", 4) = 4
[pid 1654] close(3) = 0
[pid 1654] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1654] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1654] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1654] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1655 attached
, parent_tid=[1655], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1655
[pid 1655] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1654] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1655] <... set_robust_list resumed>) = 0
[pid 1654] <... futex resumed>) = 0
[pid 1654] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1655] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1655] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1654] <... futex resumed>) = 0
[pid 1655] <... futex resumed>) = 1
[pid 1654] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1655] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1654] <... futex resumed>) = 0
[pid 1654] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1655] <... mount resumed>) = 0
[pid 1655] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1654] <... futex resumed>) = 0
[pid 1654] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1655] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1654] <... futex resumed>) = 0
[pid 1654] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1655] <... mount resumed>) = 0
[pid 1655] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1654] <... futex resumed>) = 0
[pid 1654] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1655] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1654] <... futex resumed>) = 0
[pid 1654] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1654] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1654] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1654] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1655] <... umount2 resumed>) = 0
[pid 1655] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1656 attached
) = 0
[pid 1654] <... clone resumed>, parent_tid=[1656], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1656
[pid 1656] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1655] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1654] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1656] <... set_robust_list resumed>) = 0
[pid 1654] <... futex resumed>) = 0
[pid 1656] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1654] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1656] <... umount2 resumed>) = 0
[pid 1656] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1654] <... futex resumed>) = 0
[pid 1656] <... futex resumed>) = 1
[pid 1654] exit_group(0 <unfinished ...>
[pid 1656] ????( <unfinished ...>
[pid 1654] <... exit_group resumed>) = ?
[pid 1655] <... futex resumed>) = 231
[pid 1656] <... ???? resumed>) = ?
[pid 1655] +++ exited with 0 +++
[pid 1656] +++ exited with 0 +++
[pid 1654] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1654, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1657
./strace-static-x86_64: Process 1657 attached
[pid 1657] set_robust_list(0x5555560865e0, 24) = 0
[pid 1657] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1657] setpgid(0, 0) = 0
[pid 1657] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1657] write(3, "1000", 4) = 4
[pid 1657] close(3) = 0
[pid 1657] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1657] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1657] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1657] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1658 attached
, parent_tid=[1658], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1658
[pid 1658] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1657] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1657] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1658] <... set_robust_list resumed>) = 0
[pid 1658] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1658] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1657] <... futex resumed>) = 0
[pid 1657] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1657] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1658] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1658] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1657] <... futex resumed>) = 0
[pid 1657] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1657] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1658] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1658] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1657] <... futex resumed>) = 0
[pid 1657] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1657] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1657] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1657] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1657] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1659 attached
, parent_tid=[1659], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1659
[pid 1659] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1657] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1659] <... set_robust_list resumed>) = 0
[pid 1657] <... futex resumed>) = 0
[pid 1659] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1657] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1659] <... umount2 resumed>) = 0
[pid 1658] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1659] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1657] <... futex resumed>) = 0
[pid 1658] <... umount2 resumed>) = 0
[pid 1659] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1658] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1658] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1657] exit_group(0) = ?
[pid 1659] <... futex resumed>) = ?
[pid 1659] +++ exited with 0 +++
[pid 1658] <... futex resumed>) = ?
[pid 1658] +++ exited with 0 +++
[pid 1657] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1657, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1660
./strace-static-x86_64: Process 1660 attached
[pid 1660] set_robust_list(0x5555560865e0, 24) = 0
[pid 1660] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1660] setpgid(0, 0) = 0
[pid 1660] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1660] write(3, "1000", 4) = 4
[pid 1660] close(3) = 0
[pid 1660] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1660] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1660] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1660] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1661], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1661
[pid 1660] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1660] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1661 attached
<unfinished ...>
[pid 1661] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1661] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1661] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1660] <... futex resumed>) = 0
[pid 1660] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1660] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1661] <... futex resumed>) = 1
[pid 1661] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1661] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1660] <... futex resumed>) = 0
[pid 1660] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1660] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1661] <... futex resumed>) = 1
[pid 1661] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1661] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1660] <... futex resumed>) = 0
[pid 1660] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1660] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1660] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1660] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1660] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1662 attached
, parent_tid=[1662], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1662
[pid 1660] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1660] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1662] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1662] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1661] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1662] <... umount2 resumed>) = 0
[pid 1661] <... umount2 resumed>) = 0
[pid 1661] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1661] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1662] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1660] <... futex resumed>) = 0
[pid 1660] exit_group(0 <unfinished ...>
[pid 1662] <... futex resumed>) = 1
[pid 1660] <... exit_group resumed>) = ?
[pid 1661] <... futex resumed>) = ?
[pid 1661] +++ exited with 0 +++
[pid 1662] +++ exited with 0 +++
[pid 1660] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1660, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1663
./strace-static-x86_64: Process 1663 attached
[pid 1663] set_robust_list(0x5555560865e0, 24) = 0
[pid 1663] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1663] setpgid(0, 0) = 0
[pid 1663] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1663] write(3, "1000", 4) = 4
[pid 1663] close(3) = 0
[pid 1663] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1663] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1663] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1663] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1664], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1664
[pid 1663] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1663] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1664 attached
<unfinished ...>
[pid 1664] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1664] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1664] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1663] <... futex resumed>) = 0
[pid 1663] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1663] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1664] <... futex resumed>) = 1
[pid 1664] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1664] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1663] <... futex resumed>) = 0
[pid 1663] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1663] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1664] <... futex resumed>) = 1
[pid 1664] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1664] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1663] <... futex resumed>) = 0
[pid 1663] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1663] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1663] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1663] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1663] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1664] <... futex resumed>) = 1
[pid 1663] <... clone resumed>, parent_tid=[1665], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1665
[pid 1664] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1663] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1663] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1664] <... umount2 resumed>) = 0
[pid 1664] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1664] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1665 attached
<unfinished ...>
[pid 1665] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1665] umount2("./file0", MNT_DETACH) = 0
[pid 1665] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1665] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1663] <... futex resumed>) = 0
[pid 1663] exit_group(0) = ?
[pid 1664] <... futex resumed>) = ?
[pid 1664] +++ exited with 0 +++
[pid 1665] <... futex resumed>) = ?
[pid 1665] +++ exited with 0 +++
[pid 1663] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1663, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1666
./strace-static-x86_64: Process 1666 attached
[pid 1666] set_robust_list(0x5555560865e0, 24) = 0
[pid 1666] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1666] setpgid(0, 0) = 0
[pid 1666] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1666] write(3, "1000", 4) = 4
[pid 1666] close(3) = 0
[pid 1666] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1666] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1666] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1666] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1667 attached
<unfinished ...>
[pid 1667] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1667] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1666] <... clone resumed>, parent_tid=[1667], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1667
[pid 1666] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1667] <... futex resumed>) = 0
[pid 1667] mkdir("./file0", 000 <unfinished ...>
[pid 1666] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1667] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1667] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1666] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1667] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1666] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1667] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1667] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1666] <... futex resumed>) = 0
[pid 1667] <... mount resumed>) = 0
[pid 1667] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1667] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1666] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1666] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1667] <... futex resumed>) = 0
[pid 1666] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1667] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1667] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1666] <... futex resumed>) = 0
[pid 1666] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1666] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1666] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1667] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1666] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1667] <... umount2 resumed>) = 0
[pid 1666] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1667] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1666] <... clone resumed>, parent_tid=[1668], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1668
[pid 1666] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1666] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1668 attached
<unfinished ...>
[pid 1667] <... futex resumed>) = 0
[pid 1668] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1667] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1668] <... set_robust_list resumed>) = 0
[pid 1668] umount2("./file0", MNT_DETACH) = 0
[pid 1668] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1666] <... futex resumed>) = 0
[pid 1666] exit_group(0 <unfinished ...>
[pid 1667] <... futex resumed>) = ?
[pid 1667] +++ exited with 0 +++
[pid 1666] <... exit_group resumed>) = ?
[pid 1668] +++ exited with 0 +++
[pid 1666] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1666, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1669
./strace-static-x86_64: Process 1669 attached
[pid 1669] set_robust_list(0x5555560865e0, 24) = 0
[pid 1669] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1669] setpgid(0, 0) = 0
[pid 1669] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1669] write(3, "1000", 4) = 4
[pid 1669] close(3) = 0
[pid 1669] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1669] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1669] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1669] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1670 attached
, parent_tid=[1670], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1670
[pid 1669] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1669] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1670] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1670] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1670] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1669] <... futex resumed>) = 0
[pid 1669] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1669] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1670] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1670] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1669] <... futex resumed>) = 0
[pid 1669] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1669] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1670] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1670] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1669] <... futex resumed>) = 0
[pid 1669] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1669] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1669] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1669] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1669] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1671], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1671
[pid 1669] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1669] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1671 attached
<unfinished ...>
[pid 1671] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1671] umount2("./file0", MNT_DETACH) = 0
[pid 1671] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1670] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1671] <... futex resumed>) = 1
[pid 1669] <... futex resumed>) = 0
[pid 1671] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1670] <... umount2 resumed>) = 0
[pid 1670] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1669] exit_group(0) = ?
[pid 1671] <... futex resumed>) = ?
[pid 1671] +++ exited with 0 +++
[pid 1670] +++ exited with 0 +++
[pid 1669] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1669, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1672
./strace-static-x86_64: Process 1672 attached
[pid 1672] set_robust_list(0x5555560865e0, 24) = 0
[pid 1672] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1672] setpgid(0, 0) = 0
[pid 1672] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1672] write(3, "1000", 4) = 4
[pid 1672] close(3) = 0
[pid 1672] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1672] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1672] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1672] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1673 attached
, parent_tid=[1673], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1673
[pid 1672] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1673] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1672] <... futex resumed>) = 0
[pid 1673] <... set_robust_list resumed>) = 0
[pid 1672] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1673] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1673] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1672] <... futex resumed>) = 0
[pid 1673] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1672] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1672] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1673] <... mount resumed>) = 0
[pid 1673] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1672] <... futex resumed>) = 0
[pid 1672] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1672] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1673] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1673] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1672] <... futex resumed>) = 0
[pid 1673] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1672] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1673] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1672] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1673] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1672] <... futex resumed>) = 0
[pid 1672] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1673] <... umount2 resumed>) = 0
[pid 1672] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1672] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1673] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1673] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1672] <... clone resumed>, parent_tid=[1674], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1674
[pid 1672] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1672] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1674 attached
<unfinished ...>
[pid 1674] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1674] umount2("./file0", MNT_DETACH) = 0
[pid 1674] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1672] <... futex resumed>) = 0
[pid 1672] exit_group(0 <unfinished ...>
[pid 1674] <... futex resumed>) = 1
[pid 1672] <... exit_group resumed>) = ?
[pid 1673] <... futex resumed>) = ?
[pid 1674] +++ exited with 0 +++
[pid 1673] +++ exited with 0 +++
[pid 1672] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1672, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1675
./strace-static-x86_64: Process 1675 attached
[pid 1675] set_robust_list(0x5555560865e0, 24) = 0
[pid 1675] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1675] setpgid(0, 0) = 0
[pid 1675] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1675] write(3, "1000", 4) = 4
[pid 1675] close(3) = 0
[pid 1675] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1675] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1675] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1675] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1676 attached
, parent_tid=[1676], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1676
[pid 1676] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1676] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1675] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1676] <... futex resumed>) = 0
[pid 1676] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1676] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1676] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1675] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1675] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1676] <... futex resumed>) = 0
[pid 1676] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1675] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1676] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1676] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1675] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1675] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1676] <... futex resumed>) = 0
[pid 1676] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1675] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1676] <... mount resumed>) = 0
[pid 1676] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1676] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1675] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1675] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1676] <... futex resumed>) = 0
[pid 1676] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1675] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1675] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1676] <... umount2 resumed>) = 0
[pid 1675] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1675] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1677 attached
<unfinished ...>
[pid 1676] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1676] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1675] <... clone resumed>, parent_tid=[1677], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1677
[pid 1675] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1675] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1677] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1677] umount2("./file0", MNT_DETACH) = 0
[pid 1677] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1675] <... futex resumed>) = 0
[pid 1677] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1675] exit_group(0 <unfinished ...>
[pid 1677] <... futex resumed>) = ?
[pid 1676] <... futex resumed>) = ?
[pid 1675] <... exit_group resumed>) = ?
[pid 1676] +++ exited with 0 +++
[pid 1677] +++ exited with 0 +++
[pid 1675] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1675, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1678
./strace-static-x86_64: Process 1678 attached
[pid 1678] set_robust_list(0x5555560865e0, 24) = 0
[pid 1678] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1678] setpgid(0, 0) = 0
[pid 1678] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1678] write(3, "1000", 4) = 4
[pid 1678] close(3) = 0
[pid 1678] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1678] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1678] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1678] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1679 attached
, parent_tid=[1679], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1679
[pid 1679] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1679] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1678] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1679] <... futex resumed>) = 0
[pid 1679] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1678] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1679] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1679] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1678] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1678] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1679] <... futex resumed>) = 0
[pid 1679] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1678] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1679] <... mount resumed>) = 0
[pid 1679] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1679] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1678] <... futex resumed>) = 0
[pid 1678] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1679] <... futex resumed>) = 0
[pid 1678] <... futex resumed>) = 1
[pid 1679] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1678] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1679] <... mount resumed>) = 0
[pid 1679] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1679] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1678] <... futex resumed>) = 0
[pid 1678] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1679] <... futex resumed>) = 0
[pid 1679] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1678] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1679] <... umount2 resumed>) = 0
[pid 1679] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1679] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1678] <... futex resumed>) = 0
[pid 1678] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1678] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1678] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1680 attached
, parent_tid=[1680], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1680
[pid 1680] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1680] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1678] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1680] <... futex resumed>) = 0
[pid 1678] <... futex resumed>) = 1
[pid 1680] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1678] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1680] <... umount2 resumed>) = 0
[pid 1680] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1680] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1678] <... futex resumed>) = 0
[pid 1678] exit_group(0 <unfinished ...>
[pid 1679] <... futex resumed>) = ?
[pid 1678] <... exit_group resumed>) = ?
[pid 1679] +++ exited with 0 +++
[pid 1680] <... futex resumed>) = ?
[pid 1680] +++ exited with 0 +++
[pid 1678] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1678, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1681
./strace-static-x86_64: Process 1681 attached
[pid 1681] set_robust_list(0x5555560865e0, 24) = 0
[pid 1681] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1681] setpgid(0, 0) = 0
[pid 1681] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1681] write(3, "1000", 4) = 4
[pid 1681] close(3) = 0
[pid 1681] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1681] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1681] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1681] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1682 attached
, parent_tid=[1682], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1682
[pid 1682] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1682] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1681] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1682] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1682] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1682] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1682] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1681] <... futex resumed>) = 1
[pid 1682] <... futex resumed>) = 0
[pid 1682] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1681] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1681] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1682] <... futex resumed>) = 0
[pid 1682] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1681] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1682] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1682] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1681] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1681] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1682] <... futex resumed>) = 0
[pid 1682] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1681] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1682] <... mount resumed>) = 0
[pid 1682] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1681] <... futex resumed>) = 0
[pid 1681] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1681] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1681] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1681] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1681] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1683], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1683
[pid 1681] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1681] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1683 attached
<unfinished ...>
[pid 1683] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1683] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1682] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1683] <... umount2 resumed>) = 0
[pid 1682] <... umount2 resumed>) = 0
[pid 1683] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1681] <... futex resumed>) = 0
[pid 1682] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1683] <... futex resumed>) = 1
[pid 1683] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1682] <... futex resumed>) = 0
[pid 1682] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1681] exit_group(0) = ?
[pid 1683] <... futex resumed>) = ?
[pid 1683] +++ exited with 0 +++
[pid 1682] <... futex resumed>) = ?
[pid 1682] +++ exited with 0 +++
[pid 1681] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1681, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1684
./strace-static-x86_64: Process 1684 attached
[pid 1684] set_robust_list(0x5555560865e0, 24) = 0
[pid 1684] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1684] setpgid(0, 0) = 0
[pid 1684] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1684] write(3, "1000", 4) = 4
[pid 1684] close(3) = 0
[pid 1684] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1684] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1684] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1684] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1685 attached
, parent_tid=[1685], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1685
[pid 1684] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1684] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1685] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1685] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1685] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1685] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1684] <... futex resumed>) = 0
[pid 1684] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1684] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1685] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1685] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1685] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1684] <... futex resumed>) = 0
[pid 1685] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1684] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1684] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1685] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1685] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1685] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1684] <... futex resumed>) = 0
[pid 1684] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1684] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1684] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1684] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1684] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1685] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1684] <... clone resumed>, parent_tid=[1686], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1686
[pid 1684] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1684] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1686 attached
<unfinished ...>
[pid 1686] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1686] umount2("./file0", MNT_DETACH) = 0
[pid 1686] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1684] <... futex resumed>) = 0
[pid 1686] <... futex resumed>) = 1
[pid 1686] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1685] <... umount2 resumed>) = 0
[pid 1685] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1685] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1684] exit_group(0) = ?
[pid 1685] <... futex resumed>) = ?
[pid 1685] +++ exited with 0 +++
[pid 1686] <... futex resumed>) = ?
[pid 1686] +++ exited with 0 +++
[pid 1684] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1684, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1687
./strace-static-x86_64: Process 1687 attached
[pid 1687] set_robust_list(0x5555560865e0, 24) = 0
[pid 1687] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1687] setpgid(0, 0) = 0
[pid 1687] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1687] write(3, "1000", 4) = 4
[pid 1687] close(3) = 0
[pid 1687] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1687] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1687] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1687] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1688], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1688
[pid 1687] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1687] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1688 attached
<unfinished ...>
[pid 1688] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1688] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1688] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1687] <... futex resumed>) = 0
[pid 1687] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1687] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1688] <... futex resumed>) = 1
[pid 1688] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1688] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1687] <... futex resumed>) = 0
[pid 1687] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1687] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1688] <... futex resumed>) = 1
[pid 1688] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1688] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1687] <... futex resumed>) = 0
[pid 1687] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1687] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1687] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1687] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1687] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1689], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1689
[pid 1687] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1687] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1688] <... futex resumed>) = 1
[pid 1688] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 1689 attached
) = 0
[pid 1688] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1689] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1688] <... futex resumed>) = 0
[pid 1689] <... set_robust_list resumed>) = 0
[pid 1688] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1689] umount2("./file0", MNT_DETACH) = 0
[pid 1689] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1687] <... futex resumed>) = 0
[pid 1689] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1687] exit_group(0) = ?
[pid 1689] <... futex resumed>) = 231
[pid 1688] <... futex resumed>) = ?
[pid 1689] +++ exited with 0 +++
[pid 1688] +++ exited with 0 +++
[pid 1687] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1687, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1690
./strace-static-x86_64: Process 1690 attached
[pid 1690] set_robust_list(0x5555560865e0, 24) = 0
[pid 1690] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1690] setpgid(0, 0) = 0
[pid 1690] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1690] write(3, "1000", 4) = 4
[pid 1690] close(3) = 0
[pid 1690] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1690] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1690] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1690] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1691 attached
, parent_tid=[1691], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1691
[pid 1691] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1691] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1690] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1691] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1691] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1690] <... futex resumed>) = 0
[pid 1691] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1691] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1690] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1690] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1691] <... futex resumed>) = 0
[pid 1690] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1691] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1691] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1691] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1690] <... futex resumed>) = 0
[pid 1690] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1691] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1691] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1690] <... futex resumed>) = 0
[pid 1690] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1691] <... mount resumed>) = 0
[pid 1691] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1690] <... futex resumed>) = 0
[pid 1691] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1690] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1690] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1690] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1690] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1690] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1692], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1692
[pid 1690] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1690] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1691] <... umount2 resumed>) = 0
[pid 1691] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1691] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1692 attached
<unfinished ...>
[pid 1692] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1692] umount2("./file0", MNT_DETACH) = 0
[pid 1692] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1690] <... futex resumed>) = 0
[pid 1690] exit_group(0) = ?
[pid 1691] <... futex resumed>) = ?
[pid 1691] +++ exited with 0 +++
[pid 1692] +++ exited with 0 +++
[pid 1690] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1690, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1693
./strace-static-x86_64: Process 1693 attached
[pid 1693] set_robust_list(0x5555560865e0, 24) = 0
[pid 1693] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1693] setpgid(0, 0) = 0
[pid 1693] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1693] write(3, "1000", 4) = 4
[pid 1693] close(3) = 0
[pid 1693] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1693] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1693] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1693] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1694 attached
<unfinished ...>
[pid 1694] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1693] <... clone resumed>, parent_tid=[1694], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1694
[pid 1694] <... set_robust_list resumed>) = 0
[pid 1693] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1693] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1694] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1694] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1693] <... futex resumed>) = 0
[pid 1694] <... futex resumed>) = 1
[pid 1693] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1694] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1693] <... futex resumed>) = 0
[pid 1693] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1694] <... mount resumed>) = 0
[pid 1694] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1693] <... futex resumed>) = 0
[pid 1693] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1693] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1694] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1694] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1693] <... futex resumed>) = 0
[pid 1693] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1693] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1693] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1693] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1693] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1695], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1695
[pid 1693] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1693] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1695 attached
<unfinished ...>
[pid 1695] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1695] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1694] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1695] <... umount2 resumed>) = 0
[pid 1695] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1694] <... umount2 resumed>) = 0
[pid 1693] <... futex resumed>) = 0
[pid 1695] <... futex resumed>) = 1
[pid 1694] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1695] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1694] <... futex resumed>) = 0
[pid 1694] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1693] exit_group(0) = ?
[pid 1694] <... futex resumed>) = ?
[pid 1694] +++ exited with 0 +++
[pid 1695] <... futex resumed>) = ?
[pid 1695] +++ exited with 0 +++
[pid 1693] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1693, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1696
./strace-static-x86_64: Process 1696 attached
[pid 1696] set_robust_list(0x5555560865e0, 24) = 0
[pid 1696] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1696] setpgid(0, 0) = 0
[pid 1696] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1696] write(3, "1000", 4) = 4
[pid 1696] close(3) = 0
[pid 1696] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1696] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1696] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1696] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1697 attached
, parent_tid=[1697], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1697
[pid 1697] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1697] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1696] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1697] <... futex resumed>) = 0
[pid 1696] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1697] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1697] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1697] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1696] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1696] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1697] <... futex resumed>) = 0
[pid 1696] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1697] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1697] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1696] <... futex resumed>) = 0
[pid 1697] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1696] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1696] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1697] <... mount resumed>) = 0
[pid 1697] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1696] <... futex resumed>) = 0
[pid 1696] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1697] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1696] <... futex resumed>) = 0
[pid 1696] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1696] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1696] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1696] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1697] <... umount2 resumed>) = 0
[pid 1697] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1696] <... clone resumed>, parent_tid=[1698], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1698
[pid 1697] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1696] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1696] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1698 attached
<unfinished ...>
[pid 1698] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1698] umount2("./file0", MNT_DETACH) = 0
[pid 1698] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1696] <... futex resumed>) = 0
[pid 1698] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1696] exit_group(0) = ?
[pid 1697] <... futex resumed>) = ?
[pid 1698] <... futex resumed>) = ?
[pid 1697] +++ exited with 0 +++
[pid 1698] +++ exited with 0 +++
[pid 1696] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1696, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1699
./strace-static-x86_64: Process 1699 attached
[pid 1699] set_robust_list(0x5555560865e0, 24) = 0
[pid 1699] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1699] setpgid(0, 0) = 0
[pid 1699] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1699] write(3, "1000", 4) = 4
[pid 1699] close(3) = 0
[pid 1699] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1699] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1699] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1699] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1700 attached
, parent_tid=[1700], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1700
[pid 1700] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1699] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1700] <... set_robust_list resumed>) = 0
[pid 1700] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1700] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1699] <... futex resumed>) = 0
[pid 1700] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1699] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1699] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1700] <... futex resumed>) = 0
[pid 1699] <... futex resumed>) = 1
[pid 1700] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1699] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1700] <... mount resumed>) = 0
[pid 1700] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1699] <... futex resumed>) = 0
[pid 1699] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1700] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1699] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1700] <... mount resumed>) = 0
[pid 1700] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1699] <... futex resumed>) = 0
[pid 1699] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1699] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1699] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1699] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1700] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1699] <... mprotect resumed>) = 0
[pid 1699] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1701], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1701
[pid 1699] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1700] <... umount2 resumed>) = 0
[pid 1699] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1701 attached
<unfinished ...>
[pid 1701] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1701] umount2("./file0", MNT_DETACH) = 0
[pid 1701] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1699] <... futex resumed>) = 0
[pid 1700] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1701] <... futex resumed>) = 1
[pid 1700] <... futex resumed>) = 0
[pid 1701] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1700] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1699] exit_group(0) = ?
[pid 1700] <... futex resumed>) = ?
[pid 1700] +++ exited with 0 +++
[pid 1701] <... futex resumed>) = ?
[pid 1701] +++ exited with 0 +++
[pid 1699] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1699, si_uid=0, si_status=0, si_utime=0, si_stime=1} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1702
./strace-static-x86_64: Process 1702 attached
[pid 1702] set_robust_list(0x5555560865e0, 24) = 0
[pid 1702] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1702] setpgid(0, 0) = 0
[pid 1702] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1702] write(3, "1000", 4) = 4
[pid 1702] close(3) = 0
[pid 1702] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1702] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1702] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1702] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1703], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1703
[pid 1702] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1702] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1703 attached
<unfinished ...>
[pid 1703] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1703] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1703] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1702] <... futex resumed>) = 0
[pid 1702] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1702] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1703] <... futex resumed>) = 1
[pid 1703] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1703] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1702] <... futex resumed>) = 0
[pid 1702] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1703] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1702] <... futex resumed>) = 0
[pid 1702] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1703] <... mount resumed>) = 0
[pid 1703] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1702] <... futex resumed>) = 0
[pid 1703] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1702] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1703] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1702] <... futex resumed>) = 0
[pid 1703] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1702] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1702] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1702] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1702] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1704 attached
<unfinished ...>
[pid 1703] <... umount2 resumed>) = 0
[pid 1704] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1703] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1704] <... set_robust_list resumed>) = 0
[pid 1702] <... clone resumed>, parent_tid=[1704], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1704
[pid 1704] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1703] <... futex resumed>) = 0
[pid 1704] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1702] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1704] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1703] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1702] <... futex resumed>) = 0
[pid 1702] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1704] <... umount2 resumed>) = 0
[pid 1704] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1702] <... futex resumed>) = 0
[pid 1702] exit_group(0 <unfinished ...>
[pid 1703] <... futex resumed>) = ?
[pid 1702] <... exit_group resumed>) = ?
[pid 1703] +++ exited with 0 +++
[pid 1704] <... futex resumed>) = ?
[pid 1704] +++ exited with 0 +++
[pid 1702] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1702, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1705
./strace-static-x86_64: Process 1705 attached
[pid 1705] set_robust_list(0x5555560865e0, 24) = 0
[pid 1705] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1705] setpgid(0, 0) = 0
[pid 1705] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1705] write(3, "1000", 4) = 4
[pid 1705] close(3) = 0
[pid 1705] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1705] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1705] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1705] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1706 attached
, parent_tid=[1706], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1706
[pid 1706] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1706] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1705] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1706] <... futex resumed>) = 0
[pid 1705] <... futex resumed>) = 1
[pid 1706] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1706] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1706] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1705] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1705] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1706] <... futex resumed>) = 0
[pid 1706] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1705] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1706] <... mount resumed>) = 0
[pid 1706] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1706] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1705] <... futex resumed>) = 0
[pid 1705] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1706] <... futex resumed>) = 0
[pid 1705] <... futex resumed>) = 1
[pid 1706] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1705] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1706] <... mount resumed>) = 0
[pid 1706] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1705] <... futex resumed>) = 0
[pid 1705] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1705] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1705] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1706] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1705] <... mmap resumed>) = 0x7f236e446000
[pid 1705] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1706] <... umount2 resumed>) = 0
[pid 1705] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1706] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1705] <... clone resumed>, parent_tid=[1707], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1707
[pid 1706] <... futex resumed>) = 0
[pid 1705] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1705] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1707 attached
<unfinished ...>
[pid 1707] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1706] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1707] umount2("./file0", MNT_DETACH) = 0
[pid 1707] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1705] <... futex resumed>) = 0
[pid 1705] exit_group(0) = ?
[pid 1706] <... futex resumed>) = ?
[pid 1707] <... futex resumed>) = ?
[pid 1707] +++ exited with 0 +++
[pid 1706] +++ exited with 0 +++
[pid 1705] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1705, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1708
./strace-static-x86_64: Process 1708 attached
[pid 1708] set_robust_list(0x5555560865e0, 24) = 0
[pid 1708] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1708] setpgid(0, 0) = 0
[pid 1708] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1708] write(3, "1000", 4) = 4
[pid 1708] close(3) = 0
[pid 1708] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1708] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1708] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1708] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1709 attached
, parent_tid=[1709], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1709
[pid 1709] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1709] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1708] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1709] <... futex resumed>) = 0
[pid 1709] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1709] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1708] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1709] <... futex resumed>) = 0
[pid 1709] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1708] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1708] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1709] <... futex resumed>) = 0
[pid 1708] <... futex resumed>) = 1
[pid 1709] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1708] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1709] <... mount resumed>) = 0
[pid 1709] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1709] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1708] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1708] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1709] <... futex resumed>) = 0
[pid 1709] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1708] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1709] <... mount resumed>) = 0
[pid 1709] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1709] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1708] <... futex resumed>) = 0
[pid 1708] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1709] <... futex resumed>) = 0
[pid 1708] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1709] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1708] <... futex resumed>) = 0
[pid 1708] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1709] <... umount2 resumed>) = 0
[pid 1709] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1709] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1708] <... mmap resumed>) = 0x7f236e446000
[pid 1708] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1708] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1710 attached
, parent_tid=[1710], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1710
[pid 1710] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1710] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1708] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1710] <... futex resumed>) = 0
[pid 1710] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1708] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1710] <... umount2 resumed>) = 0
[pid 1710] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1708] <... futex resumed>) = 0
[pid 1710] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1708] exit_group(0 <unfinished ...>
[pid 1709] <... futex resumed>) = ?
[pid 1708] <... exit_group resumed>) = ?
[pid 1709] +++ exited with 0 +++
[pid 1710] <... futex resumed>) = ?
[pid 1710] +++ exited with 0 +++
[pid 1708] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1708, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1711 attached
, child_tidptr=0x5555560865d0) = 1711
[pid 1711] set_robust_list(0x5555560865e0, 24) = 0
[pid 1711] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1711] setpgid(0, 0) = 0
[pid 1711] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1711] write(3, "1000", 4) = 4
[pid 1711] close(3) = 0
[pid 1711] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1711] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1711] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1711] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1712 attached
, parent_tid=[1712], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1712
[pid 1712] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1711] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1712] <... set_robust_list resumed>) = 0
[pid 1711] <... futex resumed>) = 0
[pid 1711] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1712] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1712] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1711] <... futex resumed>) = 0
[pid 1712] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1711] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1712] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1711] <... futex resumed>) = 0
[pid 1712] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1711] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1712] <... mount resumed>) = 0
[pid 1712] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1711] <... futex resumed>) = 0
[pid 1712] <... futex resumed>) = 1
[pid 1711] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1712] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1711] <... futex resumed>) = 0
[pid 1711] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1712] <... mount resumed>) = 0
[pid 1712] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1711] <... futex resumed>) = 0
[pid 1711] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1711] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1711] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1711] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1711] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1712] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1711] <... clone resumed>, parent_tid=[1713], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1713
[pid 1711] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1711] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1713 attached
<unfinished ...>
[pid 1712] <... umount2 resumed>) = 0
[pid 1713] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1713] umount2("./file0", MNT_DETACH) = 0
[pid 1712] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1713] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1711] <... futex resumed>) = 0
[pid 1711] exit_group(0) = ?
[pid 1712] <... futex resumed>) = 231
[pid 1713] <... futex resumed>) = ?
[pid 1713] +++ exited with 0 +++
[pid 1712] +++ exited with 0 +++
[pid 1711] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1711, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1714
./strace-static-x86_64: Process 1714 attached
[pid 1714] set_robust_list(0x5555560865e0, 24) = 0
[pid 1714] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1714] setpgid(0, 0) = 0
[pid 1714] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1714] write(3, "1000", 4) = 4
[pid 1714] close(3) = 0
[pid 1714] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1714] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1714] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1714] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1715 attached
, parent_tid=[1715], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1715
[pid 1715] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1715] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1714] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1715] <... futex resumed>) = 0
[pid 1714] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1715] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1715] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1715] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1714] <... futex resumed>) = 0
[pid 1714] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1715] <... futex resumed>) = 0
[pid 1714] <... futex resumed>) = 1
[pid 1715] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1714] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1715] <... mount resumed>) = 0
[pid 1715] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1714] <... futex resumed>) = 0
[pid 1715] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1714] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1714] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1715] <... mount resumed>) = 0
[pid 1715] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1714] <... futex resumed>) = 0
[pid 1714] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1715] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1714] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1714] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1714] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1714] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1715] <... umount2 resumed>) = 0
[pid 1715] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1714] <... clone resumed>, parent_tid=[1716], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1716
[pid 1714] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1714] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1715] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1716 attached
<unfinished ...>
[pid 1716] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1716] umount2("./file0", MNT_DETACH) = 0
[pid 1716] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1714] <... futex resumed>) = 0
[pid 1716] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1714] exit_group(0) = ?
[pid 1715] <... futex resumed>) = ?
[pid 1715] +++ exited with 0 +++
[pid 1716] <... futex resumed>) = ?
[pid 1716] +++ exited with 0 +++
[pid 1714] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1714, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1717 attached
, child_tidptr=0x5555560865d0) = 1717
[pid 1717] set_robust_list(0x5555560865e0, 24) = 0
[pid 1717] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1717] setpgid(0, 0) = 0
[pid 1717] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1717] write(3, "1000", 4) = 4
[pid 1717] close(3) = 0
[pid 1717] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1717] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1717] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1717] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1718 attached
<unfinished ...>
[pid 1718] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1718] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1717] <... clone resumed>, parent_tid=[1718], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1718
[pid 1717] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1718] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1718] mkdir("./file0", 000 <unfinished ...>
[pid 1717] <... futex resumed>) = 0
[pid 1718] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1718] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1718] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1717] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1717] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1718] <... futex resumed>) = 0
[pid 1717] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1718] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1718] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1718] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1717] <... futex resumed>) = 0
[pid 1717] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1718] <... futex resumed>) = 0
[pid 1717] <... futex resumed>) = 1
[pid 1717] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1718] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1718] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1717] <... futex resumed>) = 0
[pid 1718] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1717] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1717] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1717] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1717] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1717] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1718] <... umount2 resumed>) = 0
[pid 1718] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1717] <... clone resumed>, parent_tid=[1719], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1719
[pid 1718] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1717] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 1719 attached
[pid 1717] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1719] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1719] umount2("./file0", MNT_DETACH) = 0
[pid 1719] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1717] <... futex resumed>) = 0
[pid 1719] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1717] exit_group(0) = ?
[pid 1718] <... futex resumed>) = ?
[pid 1718] +++ exited with 0 +++
[pid 1719] <... futex resumed>) = ?
[pid 1719] +++ exited with 0 +++
[pid 1717] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1717, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1720
./strace-static-x86_64: Process 1720 attached
[pid 1720] set_robust_list(0x5555560865e0, 24) = 0
[pid 1720] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1720] setpgid(0, 0) = 0
[pid 1720] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1720] write(3, "1000", 4) = 4
[pid 1720] close(3) = 0
[pid 1720] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1720] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1720] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1720] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1721], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1721
./strace-static-x86_64: Process 1721 attached
[pid 1721] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1721] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1720] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1721] <... futex resumed>) = 0
[pid 1720] <... futex resumed>) = 1
[pid 1720] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1721] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1721] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1721] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1720] <... futex resumed>) = 0
[pid 1720] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1721] <... futex resumed>) = 0
[pid 1720] <... futex resumed>) = 1
[pid 1721] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1720] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1721] <... mount resumed>) = 0
[pid 1721] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1721] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1720] <... futex resumed>) = 0
[pid 1720] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1721] <... futex resumed>) = 0
[pid 1720] <... futex resumed>) = 1
[pid 1721] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1720] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1721] <... mount resumed>) = 0
[pid 1721] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1720] <... futex resumed>) = 0
[pid 1720] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1720] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1721] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1720] <... futex resumed>) = 0
[pid 1720] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1720] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1720] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1721] <... umount2 resumed>) = 0
[pid 1721] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1720] <... clone resumed>, parent_tid=[1722], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1722
[pid 1721] <... futex resumed>) = 0
[pid 1720] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1721] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1720] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1722 attached
<unfinished ...>
[pid 1722] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1722] umount2("./file0", MNT_DETACH) = 0
[pid 1722] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1720] <... futex resumed>) = 0
[pid 1722] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1720] exit_group(0) = ?
[pid 1721] <... futex resumed>) = ?
[pid 1721] +++ exited with 0 +++
[pid 1722] <... futex resumed>) = ?
[pid 1722] +++ exited with 0 +++
[pid 1720] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1720, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1723
./strace-static-x86_64: Process 1723 attached
[pid 1723] set_robust_list(0x5555560865e0, 24) = 0
[pid 1723] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1723] setpgid(0, 0) = 0
[pid 1723] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1723] write(3, "1000", 4) = 4
[pid 1723] close(3) = 0
[pid 1723] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1723] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1723] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1723] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1724 attached
, parent_tid=[1724], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1724
[pid 1724] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1723] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1724] <... set_robust_list resumed>) = 0
[pid 1723] <... futex resumed>) = 0
[pid 1724] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1724] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1724] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1723] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1723] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1724] <... futex resumed>) = 0
[pid 1723] <... futex resumed>) = 1
[pid 1724] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1723] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1724] <... mount resumed>) = 0
[pid 1724] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1724] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1723] <... futex resumed>) = 0
[pid 1723] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1724] <... futex resumed>) = 0
[pid 1723] <... futex resumed>) = 1
[pid 1723] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1724] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1724] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1723] <... futex resumed>) = 0
[pid 1724] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1723] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1724] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1723] <... futex resumed>) = 0
[pid 1724] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1723] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1724] <... umount2 resumed>) = 0
[pid 1723] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1724] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1723] <... mmap resumed>) = 0x7f236e446000
[pid 1724] <... futex resumed>) = 0
[pid 1723] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1724] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1723] <... mprotect resumed>) = 0
[pid 1723] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1725 attached
, parent_tid=[1725], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1725
[pid 1725] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1723] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1725] <... set_robust_list resumed>) = 0
[pid 1723] <... futex resumed>) = 0
[pid 1725] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1723] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1725] <... umount2 resumed>) = 0
[pid 1725] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1723] <... futex resumed>) = 0
[pid 1725] <... futex resumed>) = 1
[pid 1725] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1723] exit_group(0) = ?
[pid 1724] <... futex resumed>) = ?
[pid 1724] +++ exited with 0 +++
[pid 1725] <... futex resumed>) = ?
[pid 1725] +++ exited with 0 +++
[pid 1723] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1723, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1726
./strace-static-x86_64: Process 1726 attached
[pid 1726] set_robust_list(0x5555560865e0, 24) = 0
[pid 1726] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1726] setpgid(0, 0) = 0
[pid 1726] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1726] write(3, "1000", 4) = 4
[pid 1726] close(3) = 0
[pid 1726] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1726] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1726] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1726] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1727 attached
, parent_tid=[1727], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1727
[pid 1727] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1726] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1727] mkdir("./file0", 000 <unfinished ...>
[pid 1726] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1727] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1727] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1727] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1726] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1726] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1727] <... futex resumed>) = 0
[pid 1726] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1727] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1727] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1726] <... futex resumed>) = 0
[pid 1726] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1727] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1726] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1727] <... mount resumed>) = 0
[pid 1727] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1726] <... futex resumed>) = 0
[pid 1727] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1726] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1727] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1726] <... futex resumed>) = 0
[pid 1727] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1726] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1726] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1726] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1726] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1727] <... umount2 resumed>) = 0
[pid 1727] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1728 attached
) = 0
[pid 1726] <... clone resumed>, parent_tid=[1728], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1728
[pid 1728] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1727] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1728] <... set_robust_list resumed>) = 0
[pid 1726] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1728] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1726] <... futex resumed>) = 0
[pid 1726] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1728] <... umount2 resumed>) = 0
[pid 1728] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1726] <... futex resumed>) = 0
[pid 1728] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1726] exit_group(0) = ?
[pid 1727] <... futex resumed>) = ?
[pid 1727] +++ exited with 0 +++
[pid 1728] <... futex resumed>) = ?
[pid 1728] +++ exited with 0 +++
[pid 1726] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1726, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1729
./strace-static-x86_64: Process 1729 attached
[pid 1729] set_robust_list(0x5555560865e0, 24) = 0
[pid 1729] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1729] setpgid(0, 0) = 0
[pid 1729] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1729] write(3, "1000", 4) = 4
[pid 1729] close(3) = 0
[pid 1729] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1729] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1729] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1729] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1730 attached
, parent_tid=[1730], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1730
[pid 1730] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1729] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1730] <... set_robust_list resumed>) = 0
[pid 1729] <... futex resumed>) = 0
[pid 1729] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1730] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1730] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1729] <... futex resumed>) = 0
[pid 1730] <... futex resumed>) = 1
[pid 1729] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1730] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1729] <... futex resumed>) = 0
[pid 1729] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1730] <... mount resumed>) = 0
[pid 1730] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1729] <... futex resumed>) = 0
[pid 1730] <... futex resumed>) = 1
[pid 1729] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1730] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1729] <... futex resumed>) = 0
[pid 1729] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1730] <... mount resumed>) = 0
[pid 1730] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1729] <... futex resumed>) = 0
[pid 1729] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1730] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1729] <... futex resumed>) = 0
[pid 1729] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1729] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1729] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1729] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1730] <... umount2 resumed>) = 0
[pid 1730] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1731 attached
) = 0
[pid 1729] <... clone resumed>, parent_tid=[1731], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1731
[pid 1731] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1730] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1729] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1731] <... set_robust_list resumed>) = 0
[pid 1729] <... futex resumed>) = 0
[pid 1731] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1729] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1731] <... umount2 resumed>) = 0
[pid 1731] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1729] <... futex resumed>) = 0
[pid 1731] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1729] exit_group(0) = ?
[pid 1730] <... futex resumed>) = ?
[pid 1730] +++ exited with 0 +++
[pid 1731] <... futex resumed>) = ?
[pid 1731] +++ exited with 0 +++
[pid 1729] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1729, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1732
./strace-static-x86_64: Process 1732 attached
[pid 1732] set_robust_list(0x5555560865e0, 24) = 0
[pid 1732] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1732] setpgid(0, 0) = 0
[pid 1732] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1732] write(3, "1000", 4) = 4
[pid 1732] close(3) = 0
[pid 1732] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1732] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1732] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1732] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1733 attached
<unfinished ...>
[pid 1733] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1732] <... clone resumed>, parent_tid=[1733], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1733
[pid 1733] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1732] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1733] <... futex resumed>) = 0
[pid 1732] <... futex resumed>) = 1
[pid 1733] mkdir("./file0", 000 <unfinished ...>
[pid 1732] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1733] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1733] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1732] <... futex resumed>) = 0
[pid 1732] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1732] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1733] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1733] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1732] <... futex resumed>) = 0
[pid 1733] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1732] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1732] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1733] <... mount resumed>) = 0
[pid 1733] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1733] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1732] <... futex resumed>) = 0
[pid 1732] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1732] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1732] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1732] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1733] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1732] <... mprotect resumed>) = 0
[pid 1733] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1732] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1734], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1734
[pid 1732] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1733] <... umount2 resumed>) = 0
[pid 1732] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1734 attached
<unfinished ...>
[pid 1733] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1734] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1733] <... futex resumed>) = 0
[pid 1734] <... set_robust_list resumed>) = 0
[pid 1733] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1734] umount2("./file0", MNT_DETACH) = 0
[pid 1734] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1732] <... futex resumed>) = 0
[pid 1734] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1732] exit_group(0) = ?
[pid 1734] <... futex resumed>) = ?
[pid 1733] <... futex resumed>) = ?
[pid 1733] +++ exited with 0 +++
[pid 1734] +++ exited with 0 +++
[pid 1732] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1732, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1735
./strace-static-x86_64: Process 1735 attached
[pid 1735] set_robust_list(0x5555560865e0, 24) = 0
[pid 1735] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1735] setpgid(0, 0) = 0
[pid 1735] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1735] write(3, "1000", 4) = 4
[pid 1735] close(3) = 0
[pid 1735] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1735] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1735] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1735] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1736 attached
, parent_tid=[1736], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1736
[pid 1736] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1735] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1736] <... set_robust_list resumed>) = 0
[pid 1735] <... futex resumed>) = 0
[pid 1735] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1736] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1736] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1735] <... futex resumed>) = 0
[pid 1736] <... futex resumed>) = 1
[pid 1735] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1736] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1735] <... futex resumed>) = 0
[pid 1735] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1736] <... mount resumed>) = 0
[pid 1736] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1735] <... futex resumed>) = 0
[pid 1736] <... futex resumed>) = 1
[pid 1735] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1736] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1735] <... futex resumed>) = 0
[pid 1735] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1736] <... mount resumed>) = 0
[pid 1736] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1735] <... futex resumed>) = 0
[pid 1735] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1735] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1735] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1735] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1735] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1737], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1737
./strace-static-x86_64: Process 1737 attached
[pid 1735] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1735] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1737] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1737] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1736] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1737] <... umount2 resumed>) = 0
[pid 1737] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1735] <... futex resumed>) = 0
[pid 1737] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1736] <... umount2 resumed>) = 0
[pid 1736] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1735] exit_group(0) = ?
[pid 1737] <... futex resumed>) = ?
[pid 1737] +++ exited with 0 +++
[pid 1736] +++ exited with 0 +++
[pid 1735] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1735, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1738
./strace-static-x86_64: Process 1738 attached
[pid 1738] set_robust_list(0x5555560865e0, 24) = 0
[pid 1738] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1738] setpgid(0, 0) = 0
[pid 1738] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1738] write(3, "1000", 4) = 4
[pid 1738] close(3) = 0
[pid 1738] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1738] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1738] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1738] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1739], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1739
[pid 1738] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1738] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1739 attached
<unfinished ...>
[pid 1739] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1739] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1739] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1738] <... futex resumed>) = 0
[pid 1738] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1738] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1739] <... futex resumed>) = 1
[pid 1739] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1739] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1738] <... futex resumed>) = 0
[pid 1738] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1738] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1739] <... futex resumed>) = 1
[pid 1739] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1739] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1738] <... futex resumed>) = 0
[pid 1738] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1738] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1738] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1739] <... futex resumed>) = 1
[pid 1738] <... mmap resumed>) = 0x7f236e446000
[pid 1738] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1738] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1740], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1740
[pid 1738] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1738] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1739] umount2("./file0", MNT_DETACH) = 0
[pid 1739] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1739] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1740 attached
<unfinished ...>
[pid 1740] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1740] umount2("./file0", MNT_DETACH) = 0
[pid 1740] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1738] <... futex resumed>) = 0
[pid 1738] exit_group(0) = ?
[pid 1739] <... futex resumed>) = ?
[pid 1739] +++ exited with 0 +++
[pid 1740] <... futex resumed>) = ?
[pid 1740] +++ exited with 0 +++
[pid 1738] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1738, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1741
./strace-static-x86_64: Process 1741 attached
[pid 1741] set_robust_list(0x5555560865e0, 24) = 0
[pid 1741] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1741] setpgid(0, 0) = 0
[pid 1741] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1741] write(3, "1000", 4) = 4
[pid 1741] close(3) = 0
[pid 1741] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1741] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1741] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1741] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1742 attached
, parent_tid=[1742], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1742
[pid 1742] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1742] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1741] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1742] <... futex resumed>) = 0
[pid 1741] <... futex resumed>) = 1
[pid 1742] mkdir("./file0", 000 <unfinished ...>
[pid 1741] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1742] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1742] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1742] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1741] <... futex resumed>) = 0
[pid 1741] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1742] <... futex resumed>) = 0
[pid 1741] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1742] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1742] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1741] <... futex resumed>) = 0
[pid 1741] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1741] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1742] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1742] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1741] <... futex resumed>) = 0
[pid 1741] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1742] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1741] <... futex resumed>) = 0
[pid 1741] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1741] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1741] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1742] <... umount2 resumed>) = 0
[pid 1741] <... mprotect resumed>) = 0
[pid 1741] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1743], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1743
[pid 1742] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1741] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1741] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1743 attached
<unfinished ...>
[pid 1743] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1743] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1742] <... futex resumed>) = 0
[pid 1742] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1743] <... umount2 resumed>) = 0
[pid 1743] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1741] <... futex resumed>) = 0
[pid 1741] exit_group(0) = ?
[pid 1743] <... futex resumed>) = ?
[pid 1743] +++ exited with 0 +++
[pid 1742] <... futex resumed>) = ?
[pid 1742] +++ exited with 0 +++
[pid 1741] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1741, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1744
./strace-static-x86_64: Process 1744 attached
[pid 1744] set_robust_list(0x5555560865e0, 24) = 0
[pid 1744] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1744] setpgid(0, 0) = 0
[pid 1744] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1744] write(3, "1000", 4) = 4
[pid 1744] close(3) = 0
[pid 1744] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1744] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1744] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1744] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1745 attached
<unfinished ...>
[pid 1745] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1744] <... clone resumed>, parent_tid=[1745], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1745
[pid 1745] <... set_robust_list resumed>) = 0
[pid 1744] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1744] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1745] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1745] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1744] <... futex resumed>) = 0
[pid 1745] <... futex resumed>) = 1
[pid 1744] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1745] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1744] <... futex resumed>) = 0
[pid 1744] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1745] <... mount resumed>) = 0
[pid 1745] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1744] <... futex resumed>) = 0
[pid 1745] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1744] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1745] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1744] <... futex resumed>) = 0
[pid 1745] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1744] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1745] <... mount resumed>) = 0
[pid 1745] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1744] <... futex resumed>) = 0
[pid 1745] <... futex resumed>) = 1
[pid 1744] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1745] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1744] <... futex resumed>) = 0
[pid 1744] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1744] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1744] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1745] <... umount2 resumed>) = 0
[pid 1744] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1745] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1746 attached
) = 0
[pid 1744] <... clone resumed>, parent_tid=[1746], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1746
[pid 1746] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1745] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1746] <... set_robust_list resumed>) = 0
[pid 1744] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1746] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1744] <... futex resumed>) = 0
[pid 1744] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1746] <... umount2 resumed>) = 0
[pid 1746] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1744] <... futex resumed>) = 0
[pid 1746] <... futex resumed>) = 1
[pid 1744] exit_group(0 <unfinished ...>
[pid 1746] ????( <unfinished ...>
[pid 1744] <... exit_group resumed>) = ?
[pid 1745] <... futex resumed>) = ?
[pid 1745] +++ exited with 0 +++
[pid 1746] <... ???? resumed>) = ?
[pid 1746] +++ exited with 0 +++
[pid 1744] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1744, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1747
./strace-static-x86_64: Process 1747 attached
[pid 1747] set_robust_list(0x5555560865e0, 24) = 0
[pid 1747] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1747] setpgid(0, 0) = 0
[pid 1747] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1747] write(3, "1000", 4) = 4
[pid 1747] close(3) = 0
[pid 1747] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1747] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1747] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1747] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1748], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1748
[pid 1747] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1747] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1748 attached
<unfinished ...>
[pid 1748] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1748] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1748] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1747] <... futex resumed>) = 0
[pid 1747] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1747] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1748] <... futex resumed>) = 1
[pid 1748] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1748] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1747] <... futex resumed>) = 0
[pid 1747] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1747] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1748] <... futex resumed>) = 1
[pid 1748] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1748] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1747] <... futex resumed>) = 0
[pid 1747] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1747] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1747] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1747] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1747] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1749 attached
<unfinished ...>
[pid 1749] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1747] <... clone resumed>, parent_tid=[1749], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1749
[pid 1747] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1747] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1748] <... futex resumed>) = 1
[pid 1748] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1749] <... set_robust_list resumed>) = 0
[pid 1749] umount2("./file0", MNT_DETACH) = 0
[pid 1749] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1748] <... umount2 resumed>) = 0
[pid 1749] <... futex resumed>) = 1
[pid 1748] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1747] <... futex resumed>) = 0
[pid 1747] exit_group(0) = ?
[pid 1748] <... futex resumed>) = ?
[pid 1749] +++ exited with 0 +++
[pid 1748] +++ exited with 0 +++
[pid 1747] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1747, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1750
./strace-static-x86_64: Process 1750 attached
[pid 1750] set_robust_list(0x5555560865e0, 24) = 0
[pid 1750] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1750] setpgid(0, 0) = 0
[pid 1750] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1750] write(3, "1000", 4) = 4
[pid 1750] close(3) = 0
[pid 1750] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1750] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1750] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1750] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1751 attached
, parent_tid=[1751], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1751
[pid 1751] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1751] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1750] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1751] <... futex resumed>) = 0
[pid 1751] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1750] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1751] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1751] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1750] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1750] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1751] <... futex resumed>) = 0
[pid 1750] <... futex resumed>) = 1
[pid 1751] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1750] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1751] <... mount resumed>) = 0
[pid 1751] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1751] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1750] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1750] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1751] <... futex resumed>) = 0
[pid 1750] <... futex resumed>) = 1
[pid 1751] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1750] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1751] <... mount resumed>) = 0
[pid 1751] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1751] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1750] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1750] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1751] <... futex resumed>) = 0
[pid 1751] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1750] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1750] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1751] <... umount2 resumed>) = 0
[pid 1750] <... mmap resumed>) = 0x7f236e446000
[pid 1750] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1750] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1751] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1751] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1750] <... clone resumed>, parent_tid=[1752], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1752
[pid 1750] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1750] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1752 attached
<unfinished ...>
[pid 1752] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1752] umount2("./file0", MNT_DETACH) = 0
[pid 1752] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1750] <... futex resumed>) = 0
[pid 1750] exit_group(0) = ?
[pid 1751] <... futex resumed>) = ?
[pid 1752] +++ exited with 0 +++
[pid 1751] +++ exited with 0 +++
[pid 1750] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1750, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1753 attached
, child_tidptr=0x5555560865d0) = 1753
[pid 1753] set_robust_list(0x5555560865e0, 24) = 0
[pid 1753] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1753] setpgid(0, 0) = 0
[pid 1753] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1753] write(3, "1000", 4) = 4
[pid 1753] close(3) = 0
[pid 1753] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1753] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1753] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1753] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1754 attached
, parent_tid=[1754], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1754
[pid 1754] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1754] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1753] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1754] <... futex resumed>) = 0
[pid 1754] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1754] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1754] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1753] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1753] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1754] <... futex resumed>) = 0
[pid 1754] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1753] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1754] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1754] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1753] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1753] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1754] <... futex resumed>) = 0
[pid 1754] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1753] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1754] <... mount resumed>) = 0
[pid 1754] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1753] <... futex resumed>) = 0
[pid 1753] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1753] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1753] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1754] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1753] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1753] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1755], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1755
[pid 1754] <... umount2 resumed>) = 0
[pid 1753] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1753] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1755 attached
<unfinished ...>
[pid 1755] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1755] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1754] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1755] <... umount2 resumed>) = 0
[pid 1754] <... futex resumed>) = 0
[pid 1755] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1753] <... futex resumed>) = 0
[pid 1753] exit_group(0 <unfinished ...>
[pid 1754] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1753] <... exit_group resumed>) = ?
[pid 1755] <... futex resumed>) = ?
[pid 1754] <... futex resumed>) = ?
[pid 1755] +++ exited with 0 +++
[pid 1754] +++ exited with 0 +++
[pid 1753] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1753, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1756
./strace-static-x86_64: Process 1756 attached
[pid 1756] set_robust_list(0x5555560865e0, 24) = 0
[pid 1756] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1756] setpgid(0, 0) = 0
[pid 1756] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1756] write(3, "1000", 4) = 4
[pid 1756] close(3) = 0
[pid 1756] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1756] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1756] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1756] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1757 attached
, parent_tid=[1757], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1757
[pid 1757] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1756] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1757] <... set_robust_list resumed>) = 0
[pid 1756] <... futex resumed>) = 0
[pid 1756] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1757] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1757] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1756] <... futex resumed>) = 0
[pid 1757] <... futex resumed>) = 1
[pid 1756] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1757] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1756] <... futex resumed>) = 0
[pid 1756] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1757] <... mount resumed>) = 0
[pid 1757] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1756] <... futex resumed>) = 0
[pid 1757] <... futex resumed>) = 1
[pid 1756] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1757] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1756] <... futex resumed>) = 0
[pid 1756] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1757] <... mount resumed>) = 0
[pid 1757] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1756] <... futex resumed>) = 0
[pid 1757] <... futex resumed>) = 1
[pid 1756] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1757] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1756] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1756] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1756] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1757] <... umount2 resumed>) = 0
[pid 1756] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1757] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1758 attached
) = 0
[pid 1756] <... clone resumed>, parent_tid=[1758], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1758
[pid 1758] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1757] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1756] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1756] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1758] <... set_robust_list resumed>) = 0
[pid 1758] umount2("./file0", MNT_DETACH) = 0
[pid 1758] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1756] <... futex resumed>) = 0
[pid 1756] exit_group(0) = ?
[pid 1757] <... futex resumed>) = ?
[pid 1757] +++ exited with 0 +++
[pid 1758] +++ exited with 0 +++
[pid 1756] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1756, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1759
./strace-static-x86_64: Process 1759 attached
[pid 1759] set_robust_list(0x5555560865e0, 24) = 0
[pid 1759] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1759] setpgid(0, 0) = 0
[pid 1759] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1759] write(3, "1000", 4) = 4
[pid 1759] close(3) = 0
[pid 1759] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1759] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1759] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1759] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1760 attached
, parent_tid=[1760], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1760
[pid 1760] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1759] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1760] <... set_robust_list resumed>) = 0
[pid 1759] <... futex resumed>) = 0
[pid 1759] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1760] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1760] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1759] <... futex resumed>) = 0
[pid 1760] <... futex resumed>) = 1
[pid 1759] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1760] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1759] <... futex resumed>) = 0
[pid 1759] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1760] <... mount resumed>) = 0
[pid 1760] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1759] <... futex resumed>) = 0
[pid 1760] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1759] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1760] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1759] <... futex resumed>) = 0
[pid 1760] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1759] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1760] <... mount resumed>) = 0
[pid 1760] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1759] <... futex resumed>) = 0
[pid 1759] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1760] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1759] <... futex resumed>) = 0
[pid 1759] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1759] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1759] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1760] <... umount2 resumed>) = 0
[pid 1759] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1761], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1761
[pid 1759] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1759] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1760] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1761 attached
<unfinished ...>
[pid 1761] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1761] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1760] <... futex resumed>) = 0
[pid 1760] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1761] <... umount2 resumed>) = 0
[pid 1761] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1759] <... futex resumed>) = 0
[pid 1759] exit_group(0) = ?
[pid 1760] <... futex resumed>) = ?
[pid 1760] +++ exited with 0 +++
[pid 1761] +++ exited with 0 +++
[pid 1759] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1759, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1762
./strace-static-x86_64: Process 1762 attached
[pid 1762] set_robust_list(0x5555560865e0, 24) = 0
[pid 1762] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1762] setpgid(0, 0) = 0
[pid 1762] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1762] write(3, "1000", 4) = 4
[pid 1762] close(3) = 0
[pid 1762] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1762] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1762] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1762] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1763], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1763
[pid 1762] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1762] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1763 attached
<unfinished ...>
[pid 1763] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1763] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1763] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1762] <... futex resumed>) = 0
[pid 1762] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1762] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1763] <... futex resumed>) = 1
[pid 1763] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1763] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1762] <... futex resumed>) = 0
[pid 1763] <... futex resumed>) = 1
[pid 1762] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1763] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1762] <... futex resumed>) = 0
[pid 1762] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1763] <... mount resumed>) = 0
[pid 1763] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1762] <... futex resumed>) = 0
[pid 1762] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1763] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1762] <... futex resumed>) = 0
[pid 1762] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1762] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1763] <... umount2 resumed>) = 0
[pid 1762] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1763] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1762] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1763] <... futex resumed>) = 0
./strace-static-x86_64: Process 1764 attached
[pid 1762] <... clone resumed>, parent_tid=[1764], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1764
[pid 1763] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1762] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1762] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1764] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1764] umount2("./file0", MNT_DETACH) = 0
[pid 1764] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1762] <... futex resumed>) = 0
[pid 1762] exit_group(0 <unfinished ...>
[pid 1764] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1763] <... futex resumed>) = ?
[pid 1762] <... exit_group resumed>) = ?
[pid 1763] +++ exited with 0 +++
[pid 1764] <... futex resumed>) = ?
[pid 1764] +++ exited with 0 +++
[pid 1762] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1762, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1765
./strace-static-x86_64: Process 1765 attached
[pid 1765] set_robust_list(0x5555560865e0, 24) = 0
[pid 1765] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1765] setpgid(0, 0) = 0
[pid 1765] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1765] write(3, "1000", 4) = 4
[pid 1765] close(3) = 0
[pid 1765] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1765] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1765] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1765] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1766 attached
<unfinished ...>
[pid 1766] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1766] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1765] <... clone resumed>, parent_tid=[1766], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1766
[pid 1765] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1766] <... futex resumed>) = 0
[pid 1766] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1766] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1766] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1765] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1765] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1766] <... futex resumed>) = 0
[pid 1766] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1765] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1766] <... mount resumed>) = 0
[pid 1766] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1765] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1766] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1765] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1766] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1765] <... futex resumed>) = 0
[pid 1766] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1765] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1766] <... mount resumed>) = 0
[pid 1766] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1766] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1765] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1765] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1766] <... futex resumed>) = 0
[pid 1765] <... futex resumed>) = 1
[pid 1766] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1765] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1766] <... umount2 resumed>) = 0
[pid 1766] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1765] <... futex resumed>) = 0
[pid 1766] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1765] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1765] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1765] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1767 attached
, parent_tid=[1767], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1767
[pid 1767] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1767] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1765] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1767] <... futex resumed>) = 0
[pid 1765] <... futex resumed>) = 1
[pid 1767] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1765] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1767] <... umount2 resumed>) = 0
[pid 1767] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1767] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1765] <... futex resumed>) = 0
[pid 1765] exit_group(0) = ?
[pid 1766] <... futex resumed>) = ?
[pid 1766] +++ exited with 0 +++
[pid 1767] <... futex resumed>) = ?
[pid 1767] +++ exited with 0 +++
[pid 1765] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1765, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1768
./strace-static-x86_64: Process 1768 attached
[pid 1768] set_robust_list(0x5555560865e0, 24) = 0
[pid 1768] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1768] setpgid(0, 0) = 0
[pid 1768] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1768] write(3, "1000", 4) = 4
[pid 1768] close(3) = 0
[pid 1768] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1768] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1768] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1768] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1769 attached
, parent_tid=[1769], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1769
[pid 1769] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1768] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1769] <... set_robust_list resumed>) = 0
[pid 1768] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1769] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1769] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1768] <... futex resumed>) = 0
[pid 1769] <... futex resumed>) = 1
[pid 1768] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1769] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1768] <... futex resumed>) = 0
[pid 1768] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1769] <... mount resumed>) = 0
[pid 1769] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1768] <... futex resumed>) = 0
[pid 1769] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1768] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1769] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1768] <... futex resumed>) = 0
[pid 1769] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1768] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1769] <... mount resumed>) = 0
[pid 1769] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1768] <... futex resumed>) = 0
[pid 1768] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1768] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1769] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1768] <... futex resumed>) = 0
[pid 1768] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1769] <... umount2 resumed>) = 0
[pid 1768] <... mmap resumed>) = 0x7f236e446000
[pid 1768] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1768] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1769] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1768] <... clone resumed>, parent_tid=[1770], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1770
[pid 1768] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1769] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1768] <... futex resumed>) = 0
[pid 1768] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1770 attached
<unfinished ...>
[pid 1770] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1770] umount2("./file0", MNT_DETACH) = 0
[pid 1770] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1768] <... futex resumed>) = 0
[pid 1768] exit_group(0) = ?
[pid 1769] <... futex resumed>) = ?
[pid 1769] +++ exited with 0 +++
[pid 1770] +++ exited with 0 +++
[pid 1768] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1768, si_uid=0, si_status=0, si_utime=0, si_stime=1} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1771
./strace-static-x86_64: Process 1771 attached
[pid 1771] set_robust_list(0x5555560865e0, 24) = 0
[pid 1771] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1771] setpgid(0, 0) = 0
[pid 1771] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1771] write(3, "1000", 4) = 4
[pid 1771] close(3) = 0
[pid 1771] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1771] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1771] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1771] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1772 attached
<unfinished ...>
[pid 1772] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1772] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1771] <... clone resumed>, parent_tid=[1772], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1772
[pid 1771] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1772] <... futex resumed>) = 0
[pid 1772] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1772] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1772] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1771] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1771] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1772] <... futex resumed>) = 0
[pid 1772] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1771] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1772] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1772] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1771] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1771] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1772] <... futex resumed>) = 0
[pid 1772] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1771] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1772] <... mount resumed>) = 0
[pid 1772] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1772] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1771] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1771] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1772] <... futex resumed>) = 0
[pid 1771] <... futex resumed>) = 1
[pid 1772] umount2("./file0", MNT_DETACH) = 0
[pid 1772] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1772] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1771] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1772] <... futex resumed>) = 0
[pid 1772] umount2("./file0", MNT_DETACH) = 0
[pid 1772] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1772] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1771] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1771] exit_group(0) = ?
[pid 1772] <... futex resumed>) = ?
[pid 1772] +++ exited with 0 +++
[pid 1771] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1771, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1773 attached
, child_tidptr=0x5555560865d0) = 1773
[pid 1773] set_robust_list(0x5555560865e0, 24) = 0
[pid 1773] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1773] setpgid(0, 0) = 0
[pid 1773] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1773] write(3, "1000", 4) = 4
[pid 1773] close(3) = 0
[pid 1773] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1773] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1773] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1773] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1774], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1774
[pid 1773] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1773] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1774 attached
<unfinished ...>
[pid 1774] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1774] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1774] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1773] <... futex resumed>) = 0
[pid 1773] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1773] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1774] <... futex resumed>) = 1
[pid 1774] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1774] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1773] <... futex resumed>) = 0
[pid 1773] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1773] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1774] <... futex resumed>) = 1
[pid 1774] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1774] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1773] <... futex resumed>) = 0
[pid 1774] <... futex resumed>) = 1
[pid 1773] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1774] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1773] <... futex resumed>) = 0
[pid 1773] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1773] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1773] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1774] <... umount2 resumed>) = 0
[pid 1773] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1774] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 1775 attached
[pid 1774] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1773] <... clone resumed>, parent_tid=[1775], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1775
[pid 1775] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1773] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1775] <... set_robust_list resumed>) = 0
[pid 1773] <... futex resumed>) = 0
[pid 1775] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1773] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1775] <... umount2 resumed>) = 0
[pid 1775] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1773] <... futex resumed>) = 0
[pid 1775] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1773] exit_group(0) = ?
[pid 1774] <... futex resumed>) = ?
[pid 1774] +++ exited with 0 +++
[pid 1775] <... futex resumed>) = ?
[pid 1775] +++ exited with 0 +++
[pid 1773] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1773, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1776
./strace-static-x86_64: Process 1776 attached
[pid 1776] set_robust_list(0x5555560865e0, 24) = 0
[pid 1776] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1776] setpgid(0, 0) = 0
[pid 1776] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1776] write(3, "1000", 4) = 4
[pid 1776] close(3) = 0
[pid 1776] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1776] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1776] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1776] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1777], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1777
./strace-static-x86_64: Process 1777 attached
[pid 1776] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1776] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1777] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1777] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1777] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1776] <... futex resumed>) = 0
[pid 1776] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1776] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1777] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1777] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1776] <... futex resumed>) = 0
[pid 1776] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1776] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1777] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1777] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1776] <... futex resumed>) = 0
[pid 1776] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1776] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1776] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1776] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1776] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1777] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1776] <... clone resumed>, parent_tid=[1778], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1778
[pid 1776] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1776] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1778 attached
<unfinished ...>
[pid 1778] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1778] umount2("./file0", MNT_DETACH) = 0
[pid 1778] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1776] <... futex resumed>) = 0
[pid 1778] <... futex resumed>) = 1
[pid 1778] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1777] <... umount2 resumed>) = 0
[pid 1777] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1777] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1776] exit_group(0) = ?
[pid 1778] <... futex resumed>) = ?
[pid 1777] <... futex resumed>) = 231
[pid 1778] +++ exited with 0 +++
[pid 1777] +++ exited with 0 +++
[pid 1776] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1776, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1779
./strace-static-x86_64: Process 1779 attached
[pid 1779] set_robust_list(0x5555560865e0, 24) = 0
[pid 1779] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1779] setpgid(0, 0) = 0
[pid 1779] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1779] write(3, "1000", 4) = 4
[pid 1779] close(3) = 0
[pid 1779] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1779] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1779] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1779] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1780 attached
, parent_tid=[1780], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1780
[pid 1780] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1779] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1780] <... set_robust_list resumed>) = 0
[pid 1779] <... futex resumed>) = 0
[pid 1779] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1780] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1780] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1779] <... futex resumed>) = 0
[pid 1779] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1780] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1779] <... futex resumed>) = 0
[pid 1779] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1780] <... mount resumed>) = 0
[pid 1780] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1779] <... futex resumed>) = 0
[pid 1780] <... futex resumed>) = 1
[pid 1779] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1780] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1779] <... futex resumed>) = 0
[pid 1779] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1780] <... mount resumed>) = 0
[pid 1780] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1779] <... futex resumed>) = 0
[pid 1779] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1780] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1779] <... futex resumed>) = 0
[pid 1779] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1779] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1780] <... umount2 resumed>) = 0
[pid 1779] <... mmap resumed>) = 0x7f236e446000
[pid 1780] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1779] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1780] <... futex resumed>) = 0
[pid 1780] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1779] <... mprotect resumed>) = 0
[pid 1779] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1781 attached
, parent_tid=[1781], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1781
[pid 1781] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1779] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1781] <... set_robust_list resumed>) = 0
[pid 1779] <... futex resumed>) = 0
[pid 1781] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1779] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1781] <... umount2 resumed>) = 0
[pid 1781] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1779] <... futex resumed>) = 0
[pid 1781] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1779] exit_group(0) = ?
[pid 1781] <... futex resumed>) = ?
[pid 1780] <... futex resumed>) = ?
[pid 1781] +++ exited with 0 +++
[pid 1780] +++ exited with 0 +++
[pid 1779] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1779, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1782 attached
, child_tidptr=0x5555560865d0) = 1782
[pid 1782] set_robust_list(0x5555560865e0, 24) = 0
[pid 1782] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1782] setpgid(0, 0) = 0
[pid 1782] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1782] write(3, "1000", 4) = 4
[pid 1782] close(3) = 0
[pid 1782] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1782] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1782] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1782] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1783 attached
<unfinished ...>
[pid 1783] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1782] <... clone resumed>, parent_tid=[1783], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1783
[pid 1782] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1783] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1783] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1783] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1782] <... futex resumed>) = 1
[pid 1783] <... futex resumed>) = 0
[pid 1783] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1782] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1782] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1783] <... futex resumed>) = 0
[pid 1782] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1783] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1783] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1783] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1782] <... futex resumed>) = 0
[pid 1782] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1783] <... futex resumed>) = 0
[pid 1782] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1783] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1783] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1782] <... futex resumed>) = 0
[pid 1783] <... futex resumed>) = 1
[pid 1782] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1783] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1782] <... futex resumed>) = 0
[pid 1782] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1783] <... umount2 resumed>) = 0
[pid 1782] <... futex resumed>) = 0
[pid 1783] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1782] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1783] <... futex resumed>) = 0
[pid 1782] <... mmap resumed>) = 0x7f236e446000
[pid 1783] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1782] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1782] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1784 attached
<unfinished ...>
[pid 1784] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1784] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1782] <... clone resumed>, parent_tid=[1784], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1784
[pid 1782] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1782] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1784] <... futex resumed>) = 0
[pid 1784] umount2("./file0", MNT_DETACH) = 0
[pid 1784] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1784] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1782] <... futex resumed>) = 0
[pid 1782] exit_group(0) = ?
[pid 1783] <... futex resumed>) = ?
[pid 1783] +++ exited with 0 +++
[pid 1784] <... futex resumed>) = ?
[pid 1784] +++ exited with 0 +++
[pid 1782] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1782, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1785
./strace-static-x86_64: Process 1785 attached
[pid 1785] set_robust_list(0x5555560865e0, 24) = 0
[pid 1785] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1785] setpgid(0, 0) = 0
[pid 1785] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1785] write(3, "1000", 4) = 4
[pid 1785] close(3) = 0
[pid 1785] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1785] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1785] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1785] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1786], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1786
[pid 1785] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1785] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1786 attached
<unfinished ...>
[pid 1786] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1786] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1786] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1785] <... futex resumed>) = 0
[pid 1785] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1785] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1786] <... futex resumed>) = 1
[pid 1786] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1786] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1785] <... futex resumed>) = 0
[pid 1785] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1785] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1786] <... futex resumed>) = 1
[pid 1786] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1786] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1785] <... futex resumed>) = 0
[pid 1785] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1785] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1785] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1785] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1785] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1787 attached
, parent_tid=[1787], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1787
[pid 1787] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1785] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1785] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1786] <... futex resumed>) = 1
[pid 1786] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1787] <... set_robust_list resumed>) = 0
[pid 1786] <... umount2 resumed>) = 0
[pid 1787] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1786] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1786] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1787] <... umount2 resumed>) = 0
[pid 1787] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1785] <... futex resumed>) = 0
[pid 1785] exit_group(0) = ?
[pid 1786] <... futex resumed>) = ? <unavailable>
[pid 1786] +++ exited with 0 +++
[pid 1787] +++ exited with 0 +++
[pid 1785] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1785, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1788
./strace-static-x86_64: Process 1788 attached
[pid 1788] set_robust_list(0x5555560865e0, 24) = 0
[pid 1788] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1788] setpgid(0, 0) = 0
[pid 1788] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1788] write(3, "1000", 4) = 4
[pid 1788] close(3) = 0
[pid 1788] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1788] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1788] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1788] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1789 attached
<unfinished ...>
[pid 1789] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1789] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1788] <... clone resumed>, parent_tid=[1789], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1789
[pid 1788] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1789] <... futex resumed>) = 0
[pid 1789] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1789] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1789] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1788] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1788] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1789] <... futex resumed>) = 0
[pid 1789] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1788] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1789] <... mount resumed>) = 0
[pid 1789] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1789] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1788] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1788] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1789] <... futex resumed>) = 0
[pid 1789] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1788] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1789] <... mount resumed>) = 0
[pid 1789] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1789] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1788] <... futex resumed>) = 0
[pid 1788] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1789] <... futex resumed>) = 0
[pid 1789] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1788] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1789] <... umount2 resumed>) = 0
[pid 1789] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1789] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1788] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1788] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1788] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1790 attached
, parent_tid=[1790], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1790
[pid 1790] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1788] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1790] <... set_robust_list resumed>) = 0
[pid 1788] <... futex resumed>) = 0
[pid 1790] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1788] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1790] <... umount2 resumed>) = 0
[pid 1790] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1790] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1788] <... futex resumed>) = 0
[pid 1788] exit_group(0) = ?
[pid 1789] <... futex resumed>) = ?
[pid 1789] +++ exited with 0 +++
[pid 1790] <... futex resumed>) = ?
[pid 1790] +++ exited with 0 +++
[pid 1788] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1788, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1791
./strace-static-x86_64: Process 1791 attached
[pid 1791] set_robust_list(0x5555560865e0, 24) = 0
[pid 1791] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1791] setpgid(0, 0) = 0
[pid 1791] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1791] write(3, "1000", 4) = 4
[pid 1791] close(3) = 0
[pid 1791] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1791] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1791] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1791] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1792 attached
<unfinished ...>
[pid 1792] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1792] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1791] <... clone resumed>, parent_tid=[1792], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1792
[pid 1791] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1792] <... futex resumed>) = 0
[pid 1792] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1792] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1792] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1791] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1791] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1792] <... futex resumed>) = 0
[pid 1792] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1792] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1792] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1791] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1791] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1792] <... futex resumed>) = 0
[pid 1792] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1791] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1792] <... mount resumed>) = 0
[pid 1792] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1792] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1791] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1791] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1792] <... futex resumed>) = 0
[pid 1791] <... futex resumed>) = 1
[pid 1792] umount2("./file0", MNT_DETACH) = 0
[pid 1791] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1792] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1792] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1791] <... futex resumed>) = 0
[pid 1791] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1791] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1791] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1793 attached
, parent_tid=[1793], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1793
[pid 1793] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1793] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1791] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1793] <... futex resumed>) = 0
[pid 1793] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1791] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1793] <... umount2 resumed>) = 0
[pid 1793] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1793] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1791] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1791] exit_group(0 <unfinished ...>
[pid 1792] <... futex resumed>) = ?
[pid 1791] <... exit_group resumed>) = ?
[pid 1792] +++ exited with 0 +++
[pid 1793] <... futex resumed>) = ?
[pid 1793] +++ exited with 0 +++
[pid 1791] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1791, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1794
./strace-static-x86_64: Process 1794 attached
[pid 1794] set_robust_list(0x5555560865e0, 24) = 0
[pid 1794] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1794] setpgid(0, 0) = 0
[pid 1794] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1794] write(3, "1000", 4) = 4
[pid 1794] close(3) = 0
[pid 1794] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1794] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1794] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1794] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1795 attached
, parent_tid=[1795], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1795
[pid 1795] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1794] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1795] <... set_robust_list resumed>) = 0
[pid 1794] <... futex resumed>) = 0
[pid 1794] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1795] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1795] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1794] <... futex resumed>) = 0
[pid 1795] <... futex resumed>) = 1
[pid 1794] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1795] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1794] <... futex resumed>) = 0
[pid 1794] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1795] <... mount resumed>) = 0
[pid 1795] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1794] <... futex resumed>) = 0
[pid 1794] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1795] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1794] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1795] <... mount resumed>) = 0
[pid 1795] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1794] <... futex resumed>) = 0
[pid 1794] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1794] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1794] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1795] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1794] <... mmap resumed>) = 0x7f236e446000
[pid 1794] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1794] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1795] <... umount2 resumed>) = 0
[pid 1794] <... clone resumed>, parent_tid=[1796], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1796
[pid 1794] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1794] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1796 attached
<unfinished ...>
[pid 1795] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1796] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1795] <... futex resumed>) = 0
[pid 1796] <... set_robust_list resumed>) = 0
[pid 1795] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1796] umount2("./file0", MNT_DETACH) = 0
[pid 1796] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1794] <... futex resumed>) = 0
[pid 1794] exit_group(0) = ?
[pid 1795] <... futex resumed>) = ?
[pid 1795] +++ exited with 0 +++
[pid 1796] +++ exited with 0 +++
[pid 1794] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1794, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1797
./strace-static-x86_64: Process 1797 attached
[pid 1797] set_robust_list(0x5555560865e0, 24) = 0
[pid 1797] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1797] setpgid(0, 0) = 0
[pid 1797] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1797] write(3, "1000", 4) = 4
[pid 1797] close(3) = 0
[pid 1797] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1797] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1797] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1797] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1798 attached
, parent_tid=[1798], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1798
[pid 1798] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1798] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1797] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1798] <... futex resumed>) = 0
[pid 1798] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1798] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1798] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1797] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1797] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1798] <... futex resumed>) = 0
[pid 1797] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1798] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1798] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1797] <... futex resumed>) = 0
[pid 1797] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1797] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1798] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1798] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1797] <... futex resumed>) = 0
[pid 1797] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1797] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1797] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1797] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1798] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1797] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1799], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1799
[pid 1797] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1797] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1799 attached
<unfinished ...>
[pid 1799] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1799] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1798] <... umount2 resumed>) = 0
[pid 1798] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1799] <... umount2 resumed>) = 0
[pid 1799] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1797] <... futex resumed>) = 0
[pid 1797] exit_group(0) = ?
[pid 1798] <... futex resumed>) = ?
[pid 1799] <... futex resumed>) = ?
[pid 1799] +++ exited with 0 +++
[pid 1798] +++ exited with 0 +++
[pid 1797] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1797, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1800
./strace-static-x86_64: Process 1800 attached
[pid 1800] set_robust_list(0x5555560865e0, 24) = 0
[pid 1800] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1800] setpgid(0, 0) = 0
[pid 1800] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1800] write(3, "1000", 4) = 4
[pid 1800] close(3) = 0
[pid 1800] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1800] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1800] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1800] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1801], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1801
[pid 1800] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1800] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1801 attached
<unfinished ...>
[pid 1801] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1801] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1801] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1800] <... futex resumed>) = 0
[pid 1800] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1800] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1801] <... futex resumed>) = 1
[pid 1801] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1801] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1800] <... futex resumed>) = 0
[pid 1800] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1800] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1801] <... futex resumed>) = 1
[pid 1801] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1801] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1800] <... futex resumed>) = 0
[pid 1800] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1800] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1800] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1800] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1800] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1802], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1802
[pid 1800] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1800] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1801] <... futex resumed>) = 1
[pid 1801] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 1802 attached
) = 0
[pid 1802] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1801] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1802] <... set_robust_list resumed>) = 0
[pid 1801] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1802] umount2("./file0", MNT_DETACH) = 0
[pid 1802] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1800] <... futex resumed>) = 0
[pid 1802] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1800] exit_group(0) = ?
[pid 1802] <... futex resumed>) = ?
[pid 1801] <... futex resumed>) = ?
[pid 1802] +++ exited with 0 +++
[pid 1801] +++ exited with 0 +++
[pid 1800] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1800, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1803
./strace-static-x86_64: Process 1803 attached
[pid 1803] set_robust_list(0x5555560865e0, 24) = 0
[pid 1803] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1803] setpgid(0, 0) = 0
[pid 1803] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1803] write(3, "1000", 4) = 4
[pid 1803] close(3) = 0
[pid 1803] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1803] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1803] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1803] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1804 attached
, parent_tid=[1804], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1804
[pid 1804] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1804] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1803] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1804] <... futex resumed>) = 0
[pid 1804] mkdir("./file0", 000 <unfinished ...>
[pid 1803] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1804] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1804] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1804] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1803] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1803] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1804] <... futex resumed>) = 0
[pid 1804] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1803] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1804] <... mount resumed>) = 0
[pid 1804] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1803] <... futex resumed>) = 0
[pid 1804] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1803] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1803] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1804] <... mount resumed>) = 0
[pid 1804] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1803] <... futex resumed>) = 0
[pid 1804] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1803] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1804] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1803] <... futex resumed>) = 0
[pid 1804] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1803] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1803] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1803] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1804] <... umount2 resumed>) = 0
[pid 1803] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1804] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 1805 attached
[pid 1804] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1803] <... clone resumed>, parent_tid=[1805], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1805
[pid 1805] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1803] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1805] <... set_robust_list resumed>) = 0
[pid 1803] <... futex resumed>) = 0
[pid 1805] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1803] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1805] <... umount2 resumed>) = 0
[pid 1805] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1803] <... futex resumed>) = 0
[pid 1805] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1803] exit_group(0) = ?
[pid 1804] <... futex resumed>) = ?
[pid 1805] <... futex resumed>) = ?
[pid 1804] +++ exited with 0 +++
[pid 1805] +++ exited with 0 +++
[pid 1803] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1803, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1806 attached
, child_tidptr=0x5555560865d0) = 1806
[pid 1806] set_robust_list(0x5555560865e0, 24) = 0
[pid 1806] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1806] setpgid(0, 0) = 0
[pid 1806] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1806] write(3, "1000", 4) = 4
[pid 1806] close(3) = 0
[pid 1806] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1806] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1806] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1806] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1807 attached
<unfinished ...>
[pid 1807] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1806] <... clone resumed>, parent_tid=[1807], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1807
[pid 1806] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1806] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1807] <... set_robust_list resumed>) = 0
[pid 1807] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1807] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1806] <... futex resumed>) = 0
[pid 1807] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1806] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1807] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1806] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1807] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1807] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1806] <... futex resumed>) = 0
[pid 1806] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1807] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1806] <... futex resumed>) = 0
[pid 1806] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1807] <... mount resumed>) = 0
[pid 1807] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1806] <... futex resumed>) = 0
[pid 1806] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1807] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1806] <... futex resumed>) = 0
[pid 1806] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1806] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1806] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1806] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1807] <... umount2 resumed>) = 0
[pid 1806] <... clone resumed>, parent_tid=[1808], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1808
[pid 1806] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1806] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1808 attached
<unfinished ...>
[pid 1808] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1808] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1807] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1808] <... umount2 resumed>) = 0
[pid 1807] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1808] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1806] <... futex resumed>) = 0
[pid 1806] exit_group(0 <unfinished ...>
[pid 1807] <... futex resumed>) = ?
[pid 1806] <... exit_group resumed>) = ?
[pid 1807] +++ exited with 0 +++
[pid 1808] <... futex resumed>) = ?
[pid 1808] +++ exited with 0 +++
[pid 1806] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1806, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1809 attached
, child_tidptr=0x5555560865d0) = 1809
[pid 1809] set_robust_list(0x5555560865e0, 24) = 0
[pid 1809] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1809] setpgid(0, 0) = 0
[pid 1809] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1809] write(3, "1000", 4) = 4
[pid 1809] close(3) = 0
[pid 1809] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1809] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1809] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1809] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1810], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1810
./strace-static-x86_64: Process 1810 attached
[pid 1809] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1809] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1810] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1810] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1810] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1809] <... futex resumed>) = 0
[pid 1810] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1809] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1809] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1810] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1810] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1810] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1809] <... futex resumed>) = 0
[pid 1809] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1809] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1810] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1810] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1809] <... futex resumed>) = 0
[pid 1809] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1810] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1809] <... futex resumed>) = 0
[pid 1809] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1809] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1809] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1809] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1811], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1811
[pid 1809] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1809] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1811 attached
<unfinished ...>
[pid 1811] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1811] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1810] <... umount2 resumed>) = 0
[pid 1810] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1811] <... umount2 resumed>) = 0
[pid 1810] <... futex resumed>) = 0
[pid 1811] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1809] <... futex resumed>) = 0
[pid 1809] exit_group(0 <unfinished ...>
[pid 1810] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1809] <... exit_group resumed>) = ?
[pid 1811] <... futex resumed>) = ?
[pid 1810] <... futex resumed>) = ?
[pid 1811] +++ exited with 0 +++
[pid 1810] +++ exited with 0 +++
[pid 1809] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1809, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1812
./strace-static-x86_64: Process 1812 attached
[pid 1812] set_robust_list(0x5555560865e0, 24) = 0
[pid 1812] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1812] setpgid(0, 0) = 0
[pid 1812] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1812] write(3, "1000", 4) = 4
[pid 1812] close(3) = 0
[pid 1812] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1812] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1812] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1812] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1813], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1813
./strace-static-x86_64: Process 1813 attached
[pid 1813] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1812] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1812] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1813] <... set_robust_list resumed>) = 0
[pid 1813] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1813] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1812] <... futex resumed>) = 0
[pid 1812] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1812] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1813] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1813] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1812] <... futex resumed>) = 0
[pid 1812] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1812] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1813] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1813] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1812] <... futex resumed>) = 0
[pid 1813] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1812] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1812] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1812] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1812] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1813] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1812] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1813] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1812] <... clone resumed>, parent_tid=[1814], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1814
./strace-static-x86_64: Process 1814 attached
[pid 1814] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1814] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1812] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1813] <... umount2 resumed>) = 0
[pid 1814] <... futex resumed>) = 0
[pid 1814] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1813] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1812] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1814] <... umount2 resumed>) = 0
[pid 1814] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1814] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1813] <... futex resumed>) = 0
[pid 1812] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1813] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1812] exit_group(0) = ?
[pid 1813] <... futex resumed>) = ?
[pid 1814] <... futex resumed>) = ?
[pid 1814] +++ exited with 0 +++
[pid 1813] +++ exited with 0 +++
[pid 1812] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1812, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1815
./strace-static-x86_64: Process 1815 attached
[pid 1815] set_robust_list(0x5555560865e0, 24) = 0
[pid 1815] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1815] setpgid(0, 0) = 0
[pid 1815] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1815] write(3, "1000", 4) = 4
[pid 1815] close(3) = 0
[pid 1815] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1815] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1815] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1815] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1816], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1816
./strace-static-x86_64: Process 1816 attached
[pid 1815] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1815] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1816] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1816] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1816] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1816] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1815] <... futex resumed>) = 0
[pid 1815] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1815] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1816] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1816] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1816] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1815] <... futex resumed>) = 0
[pid 1815] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1815] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1816] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1816] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1815] <... futex resumed>) = 0
[pid 1815] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1815] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1815] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1815] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1816] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1815] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1817], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1817
[pid 1815] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1815] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1817 attached
<unfinished ...>
[pid 1817] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1817] umount2("./file0", MNT_DETACH) = 0
[pid 1816] <... umount2 resumed>) = 0
[pid 1817] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1815] <... futex resumed>) = 0
[pid 1817] <... futex resumed>) = 1
[pid 1817] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1816] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1816] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1815] exit_group(0) = ?
[pid 1817] <... futex resumed>) = ?
[pid 1817] +++ exited with 0 +++
[pid 1816] <... futex resumed>) = ?
[pid 1816] +++ exited with 0 +++
[pid 1815] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1815, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1818
./strace-static-x86_64: Process 1818 attached
[pid 1818] set_robust_list(0x5555560865e0, 24) = 0
[pid 1818] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1818] setpgid(0, 0) = 0
[pid 1818] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1818] write(3, "1000", 4) = 4
[pid 1818] close(3) = 0
[pid 1818] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1818] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1818] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1818] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1819 attached
, parent_tid=[1819], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1819
[pid 1819] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1818] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1819] <... set_robust_list resumed>) = 0
[pid 1818] <... futex resumed>) = 0
[pid 1818] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1819] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1819] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1818] <... futex resumed>) = 0
[pid 1819] <... futex resumed>) = 1
[pid 1818] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1819] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1818] <... futex resumed>) = 0
[pid 1818] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1819] <... mount resumed>) = 0
[pid 1819] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1818] <... futex resumed>) = 0
[pid 1818] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1818] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1819] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1819] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1818] <... futex resumed>) = 0
[pid 1818] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1818] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1818] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1818] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1818] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1820 attached
<unfinished ...>
[pid 1819] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1818] <... clone resumed>, parent_tid=[1820], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1820
[pid 1818] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1820] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1818] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1820] <... set_robust_list resumed>) = 0
[pid 1820] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1819] <... umount2 resumed>) = 0
[pid 1820] <... umount2 resumed>) = 0
[pid 1820] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1820] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1819] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1819] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1818] <... futex resumed>) = 0
[pid 1818] exit_group(0) = ?
[pid 1820] <... futex resumed>) = ?
[pid 1820] +++ exited with 0 +++
[pid 1819] <... futex resumed>) = ?
[pid 1819] +++ exited with 0 +++
[pid 1818] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1818, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1821
./strace-static-x86_64: Process 1821 attached
[pid 1821] set_robust_list(0x5555560865e0, 24) = 0
[pid 1821] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1821] setpgid(0, 0) = 0
[pid 1821] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1821] write(3, "1000", 4) = 4
[pid 1821] close(3) = 0
[pid 1821] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1821] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1821] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1821] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1822 attached
<unfinished ...>
[pid 1822] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1821] <... clone resumed>, parent_tid=[1822], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1822
[pid 1822] <... set_robust_list resumed>) = 0
[pid 1822] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1821] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1822] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1822] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1822] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1822] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1821] <... futex resumed>) = 1
[pid 1822] <... futex resumed>) = 0
[pid 1822] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1821] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1821] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1822] <... futex resumed>) = 0
[pid 1822] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1821] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1822] <... mount resumed>) = 0
[pid 1822] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1821] <... futex resumed>) = 0
[pid 1822] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1821] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1821] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1822] <... mount resumed>) = 0
[pid 1822] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1821] <... futex resumed>) = 0
[pid 1822] <... futex resumed>) = 1
[pid 1821] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1822] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1821] <... futex resumed>) = 0
[pid 1821] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1821] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1821] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1821] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1822] <... umount2 resumed>) = 0
[pid 1821] <... clone resumed>, parent_tid=[1823], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1823
[pid 1821] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1821] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1822] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1822] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1823 attached
<unfinished ...>
[pid 1823] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1823] umount2("./file0", MNT_DETACH) = 0
[pid 1823] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1821] <... futex resumed>) = 0
[pid 1821] exit_group(0) = ?
[pid 1822] <... futex resumed>) = ?
[pid 1822] +++ exited with 0 +++
[pid 1823] +++ exited with 0 +++
[pid 1821] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1821, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1824
./strace-static-x86_64: Process 1824 attached
[pid 1824] set_robust_list(0x5555560865e0, 24) = 0
[pid 1824] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1824] setpgid(0, 0) = 0
[pid 1824] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1824] write(3, "1000", 4) = 4
[pid 1824] close(3) = 0
[pid 1824] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1824] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1824] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1824] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1825 attached
, parent_tid=[1825], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1825
[pid 1825] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1825] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1824] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1825] <... futex resumed>) = 0
[pid 1825] mkdir("./file0", 000 <unfinished ...>
[pid 1824] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1825] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1825] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1825] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1824] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1824] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1825] <... futex resumed>) = 0
[pid 1825] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1824] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1825] <... mount resumed>) = 0
[pid 1825] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1825] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1824] <... futex resumed>) = 0
[pid 1824] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1825] <... futex resumed>) = 0
[pid 1824] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1825] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1825] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1825] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1824] <... futex resumed>) = 0
[pid 1824] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1825] <... futex resumed>) = 0
[pid 1824] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1825] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1824] <... futex resumed>) = 0
[pid 1824] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1824] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1825] <... umount2 resumed>) = 0
[pid 1825] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1825] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1824] <... mprotect resumed>) = 0
[pid 1824] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1826 attached
<unfinished ...>
[pid 1826] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1826] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1824] <... clone resumed>, parent_tid=[1826], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1826
[pid 1824] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1826] <... futex resumed>) = 0
[pid 1824] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1826] umount2("./file0", MNT_DETACH) = 0
[pid 1826] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1824] <... futex resumed>) = 0
[pid 1824] exit_group(0 <unfinished ...>
[pid 1825] <... futex resumed>) = ?
[pid 1825] +++ exited with 0 +++
[pid 1824] <... exit_group resumed>) = ?
[pid 1826] +++ exited with 0 +++
[pid 1824] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1824, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1827
./strace-static-x86_64: Process 1827 attached
[pid 1827] set_robust_list(0x5555560865e0, 24) = 0
[pid 1827] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1827] setpgid(0, 0) = 0
[pid 1827] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1827] write(3, "1000", 4) = 4
[pid 1827] close(3) = 0
[pid 1827] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1827] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1827] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1827] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1828 attached
, parent_tid=[1828], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1828
[pid 1828] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1827] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1828] <... set_robust_list resumed>) = 0
[pid 1827] <... futex resumed>) = 0
[pid 1827] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1828] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1828] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1827] <... futex resumed>) = 0
[pid 1827] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1828] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1827] <... futex resumed>) = 0
[pid 1827] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1828] <... mount resumed>) = 0
[pid 1828] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1827] <... futex resumed>) = 0
[pid 1828] <... futex resumed>) = 1
[pid 1827] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1828] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1827] <... futex resumed>) = 0
[pid 1827] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1828] <... mount resumed>) = 0
[pid 1828] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1827] <... futex resumed>) = 0
[pid 1828] <... futex resumed>) = 1
[pid 1827] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1828] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1827] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1827] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1827] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1827] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1829 attached
, parent_tid=[1829], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1829
[pid 1828] <... umount2 resumed>) = 0
[pid 1829] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1828] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1827] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1829] <... set_robust_list resumed>) = 0
[pid 1827] <... futex resumed>) = 0
[pid 1828] <... futex resumed>) = 0
[pid 1827] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1828] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1829] umount2("./file0", MNT_DETACH) = 0
[pid 1829] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1827] <... futex resumed>) = 0
[pid 1827] exit_group(0) = ?
[pid 1828] <... futex resumed>) = ?
[pid 1828] +++ exited with 0 +++
[pid 1829] +++ exited with 0 +++
[pid 1827] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1827, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1830 attached
, child_tidptr=0x5555560865d0) = 1830
[pid 1830] set_robust_list(0x5555560865e0, 24) = 0
[pid 1830] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1830] setpgid(0, 0) = 0
[pid 1830] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1830] write(3, "1000", 4) = 4
[pid 1830] close(3) = 0
[pid 1830] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1830] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1830] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1830] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1831], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1831
[pid 1830] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1830] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1831 attached
<unfinished ...>
[pid 1831] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1831] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1831] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1830] <... futex resumed>) = 0
[pid 1830] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1830] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1831] <... futex resumed>) = 1
[pid 1831] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1831] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1830] <... futex resumed>) = 0
[pid 1830] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1830] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1831] <... futex resumed>) = 1
[pid 1831] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1831] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1830] <... futex resumed>) = 0
[pid 1830] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1830] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1830] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1831] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1830] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1830] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1831] <... umount2 resumed>) = 0
[pid 1830] <... clone resumed>, parent_tid=[1832], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1832
[pid 1830] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1831] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1830] <... futex resumed>) = 0
[pid 1830] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1832 attached
<unfinished ...>
[pid 1832] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1832] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1831] <... futex resumed>) = 0
[pid 1832] <... umount2 resumed>) = 0
[pid 1831] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1832] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1830] <... futex resumed>) = 0
[pid 1832] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1830] exit_group(0) = ?
[pid 1832] <... futex resumed>) = ?
[pid 1831] <... futex resumed>) = ?
[pid 1831] +++ exited with 0 +++
[pid 1832] +++ exited with 0 +++
[pid 1830] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1830, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1833
./strace-static-x86_64: Process 1833 attached
[pid 1833] set_robust_list(0x5555560865e0, 24) = 0
[pid 1833] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1833] setpgid(0, 0) = 0
[pid 1833] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1833] write(3, "1000", 4) = 4
[pid 1833] close(3) = 0
[pid 1833] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1833] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1833] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1833] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1834 attached
, parent_tid=[1834], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1834
[pid 1834] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1834] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1833] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1834] <... futex resumed>) = 0
[pid 1834] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1834] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1834] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1833] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1833] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1834] <... futex resumed>) = 0
[pid 1834] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1833] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1834] <... mount resumed>) = 0
[pid 1834] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1834] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1833] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1833] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1834] <... futex resumed>) = 0
[pid 1834] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1833] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1834] <... mount resumed>) = 0
[pid 1834] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1833] <... futex resumed>) = 0
[pid 1833] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1833] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1833] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1833] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1833] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1835], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1835
[pid 1833] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1833] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1835 attached
<unfinished ...>
[pid 1835] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1835] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1834] umount2("./file0", MNT_DETACH) = 0
[pid 1834] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1835] <... umount2 resumed>) = 0
[pid 1834] <... futex resumed>) = 0
[pid 1835] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1833] <... futex resumed>) = 0
[pid 1833] exit_group(0) = ?
[pid 1835] <... futex resumed>) = ?
[pid 1834] +++ exited with 0 +++
[pid 1835] +++ exited with 0 +++
[pid 1833] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1833, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1836 attached
, child_tidptr=0x5555560865d0) = 1836
[pid 1836] set_robust_list(0x5555560865e0, 24) = 0
[pid 1836] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1836] setpgid(0, 0) = 0
[pid 1836] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1836] write(3, "1000", 4) = 4
[pid 1836] close(3) = 0
[pid 1836] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1836] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1836] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1836] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1837 attached
, parent_tid=[1837], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1837
[pid 1837] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1836] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1837] <... set_robust_list resumed>) = 0
[pid 1836] <... futex resumed>) = 0
[pid 1836] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1837] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1837] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1836] <... futex resumed>) = 0
[pid 1837] <... futex resumed>) = 1
[pid 1836] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1837] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1836] <... futex resumed>) = 0
[pid 1836] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1837] <... mount resumed>) = 0
[pid 1837] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1836] <... futex resumed>) = 0
[pid 1836] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1837] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1836] <... futex resumed>) = 0
[pid 1836] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1837] <... mount resumed>) = 0
[pid 1837] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1836] <... futex resumed>) = 0
[pid 1837] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1836] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1837] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1836] <... futex resumed>) = 0
[pid 1836] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1836] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1836] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1836] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1838], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1838
[pid 1837] <... umount2 resumed>) = 0
[pid 1837] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1836] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1837] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1836] <... futex resumed>) = 0
[pid 1836] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1838 attached
<unfinished ...>
[pid 1838] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1838] umount2("./file0", MNT_DETACH) = 0
[pid 1838] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1836] <... futex resumed>) = 0
[pid 1836] exit_group(0) = ?
[pid 1837] <... futex resumed>) = ?
[pid 1838] <... futex resumed>) = ?
[pid 1837] +++ exited with 0 +++
[pid 1838] +++ exited with 0 +++
[pid 1836] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1836, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1839
./strace-static-x86_64: Process 1839 attached
[pid 1839] set_robust_list(0x5555560865e0, 24) = 0
[pid 1839] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1839] setpgid(0, 0) = 0
[pid 1839] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1839] write(3, "1000", 4) = 4
[pid 1839] close(3) = 0
[pid 1839] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1839] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1839] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1839] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1840 attached
, parent_tid=[1840], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1840
[pid 1840] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1840] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1839] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1840] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1839] <... futex resumed>) = 0
[pid 1840] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1840] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1840] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1839] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1839] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1840] <... futex resumed>) = 0
[pid 1840] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1839] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1840] <... mount resumed>) = 0
[pid 1840] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1840] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1839] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1839] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1840] <... futex resumed>) = 0
[pid 1840] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1839] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1840] <... mount resumed>) = 0
[pid 1840] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1839] <... futex resumed>) = 0
[pid 1839] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1839] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1839] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1839] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1840] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1839] <... mprotect resumed>) = 0
[pid 1839] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1841], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1841
[pid 1839] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1839] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1841 attached
<unfinished ...>
[pid 1840] <... umount2 resumed>) = 0
[pid 1840] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1841] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1840] <... futex resumed>) = 0
[pid 1841] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1840] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1841] <... umount2 resumed>) = 0
[pid 1841] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1841] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1839] <... futex resumed>) = 0
[pid 1839] exit_group(0) = ?
[pid 1840] <... futex resumed>) = ?
[pid 1840] +++ exited with 0 +++
[pid 1841] <... futex resumed>) = ?
[pid 1841] +++ exited with 0 +++
[pid 1839] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1839, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1842 attached
, child_tidptr=0x5555560865d0) = 1842
[pid 1842] set_robust_list(0x5555560865e0, 24) = 0
[pid 1842] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1842] setpgid(0, 0) = 0
[pid 1842] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1842] write(3, "1000", 4) = 4
[pid 1842] close(3) = 0
[pid 1842] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1842] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1842] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1842] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1843 attached
, parent_tid=[1843], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1843
[pid 1843] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1842] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1843] <... set_robust_list resumed>) = 0
[pid 1843] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1843] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1843] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1842] <... futex resumed>) = 1
[pid 1843] <... futex resumed>) = 0
[pid 1843] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1842] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1842] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1843] <... futex resumed>) = 0
[pid 1843] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1842] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1843] <... mount resumed>) = 0
[pid 1843] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1843] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1842] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1842] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1843] <... futex resumed>) = 0
[pid 1843] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1842] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1843] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1842] <... futex resumed>) = 0
[pid 1843] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1842] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1842] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1843] <... umount2 resumed>) = 0
[pid 1843] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1842] <... futex resumed>) = 0
[pid 1843] <... futex resumed>) = 0
[pid 1843] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1842] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1842] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1842] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1844 attached
, parent_tid=[1844], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1844
[pid 1844] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1844] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1842] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1844] <... futex resumed>) = 0
[pid 1842] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1844] umount2("./file0", MNT_DETACH) = 0
[pid 1844] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1844] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1842] <... futex resumed>) = 0
[pid 1842] exit_group(0) = ?
[pid 1843] <... futex resumed>) = ?
[pid 1843] +++ exited with 0 +++
[pid 1844] <... futex resumed>) = ?
[pid 1844] +++ exited with 0 +++
[pid 1842] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1842, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1845
./strace-static-x86_64: Process 1845 attached
[pid 1845] set_robust_list(0x5555560865e0, 24) = 0
[pid 1845] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1845] setpgid(0, 0) = 0
[pid 1845] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1845] write(3, "1000", 4) = 4
[pid 1845] close(3) = 0
[pid 1845] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1845] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1845] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1845] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1846 attached
, parent_tid=[1846], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1846
[pid 1846] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1845] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1846] <... set_robust_list resumed>) = 0
[pid 1845] <... futex resumed>) = 0
[pid 1845] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1846] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1846] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1845] <... futex resumed>) = 0
[pid 1846] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1845] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1846] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1845] <... futex resumed>) = 0
[pid 1846] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1845] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1846] <... mount resumed>) = 0
[pid 1846] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1845] <... futex resumed>) = 0
[pid 1846] <... futex resumed>) = 1
[pid 1845] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1846] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1845] <... futex resumed>) = 0
[pid 1845] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1846] <... mount resumed>) = 0
[pid 1846] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1845] <... futex resumed>) = 0
[pid 1846] <... futex resumed>) = 1
[pid 1845] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1846] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1845] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1845] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1845] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1845] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1846] <... umount2 resumed>) = 0
[pid 1846] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1845] <... clone resumed>, parent_tid=[1847], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1847
[pid 1846] <... futex resumed>) = 0
[pid 1845] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1846] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1845] <... futex resumed>) = 0
./strace-static-x86_64: Process 1847 attached
[pid 1847] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1847] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1845] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1847] <... umount2 resumed>) = 0
[pid 1847] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1845] <... futex resumed>) = 0
[pid 1847] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1845] exit_group(0) = ?
[pid 1846] <... futex resumed>) = ?
[pid 1846] +++ exited with 0 +++
[pid 1847] <... futex resumed>) = ?
[pid 1847] +++ exited with 0 +++
[pid 1845] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1845, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1848
./strace-static-x86_64: Process 1848 attached
[pid 1848] set_robust_list(0x5555560865e0, 24) = 0
[pid 1848] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1848] setpgid(0, 0) = 0
[pid 1848] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1848] write(3, "1000", 4) = 4
[pid 1848] close(3) = 0
[pid 1848] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1848] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1848] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1848] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1849 attached
<unfinished ...>
[pid 1849] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1848] <... clone resumed>, parent_tid=[1849], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1849
[pid 1849] <... set_robust_list resumed>) = 0
[pid 1848] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1849] mkdir("./file0", 000 <unfinished ...>
[pid 1848] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1849] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1849] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1848] <... futex resumed>) = 0
[pid 1849] <... futex resumed>) = 1
[pid 1848] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1849] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1848] <... futex resumed>) = 0
[pid 1848] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1849] <... mount resumed>) = 0
[pid 1849] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1848] <... futex resumed>) = 0
[pid 1848] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1848] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1849] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1849] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1848] <... futex resumed>) = 0
[pid 1849] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1848] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1848] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1848] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1849] <... umount2 resumed>) = 0
[pid 1848] <... mmap resumed>) = 0x7f236e446000
[pid 1848] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1849] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1849] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1848] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1850 attached
<unfinished ...>
[pid 1850] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1848] <... clone resumed>, parent_tid=[1850], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1850
[pid 1848] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1848] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1850] <... set_robust_list resumed>) = 0
[pid 1850] umount2("./file0", MNT_DETACH) = 0
[pid 1850] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1848] <... futex resumed>) = 0
[pid 1848] exit_group(0) = ?
[pid 1849] <... futex resumed>) = ?
[pid 1849] +++ exited with 0 +++
[pid 1850] +++ exited with 0 +++
[pid 1848] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1848, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1851
./strace-static-x86_64: Process 1851 attached
[pid 1851] set_robust_list(0x5555560865e0, 24) = 0
[pid 1851] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1851] setpgid(0, 0) = 0
[pid 1851] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1851] write(3, "1000", 4) = 4
[pid 1851] close(3) = 0
[pid 1851] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1851] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1851] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1851] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1852 attached
, parent_tid=[1852], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1852
[pid 1852] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1851] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1852] <... set_robust_list resumed>) = 0
[pid 1851] <... futex resumed>) = 0
[pid 1852] mkdir("./file0", 000 <unfinished ...>
[pid 1851] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1852] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1852] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1851] <... futex resumed>) = 0
[pid 1851] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1852] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1851] <... futex resumed>) = 0
[pid 1851] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1852] <... mount resumed>) = 0
[pid 1852] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1851] <... futex resumed>) = 0
[pid 1851] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1851] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1852] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1852] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1851] <... futex resumed>) = 0
[pid 1851] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1851] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1851] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1851] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1852] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1851] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1853], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1853
[pid 1851] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1851] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1853 attached
<unfinished ...>
[pid 1853] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1853] umount2("./file0", MNT_DETACH) = 0
[pid 1853] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1851] <... futex resumed>) = 0
[pid 1852] <... umount2 resumed>) = 0
[pid 1852] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1853] <... futex resumed>) = 1
[pid 1853] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1852] <... futex resumed>) = 0
[pid 1852] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1851] exit_group(0) = ?
[pid 1852] <... futex resumed>) = -1 (errno 18446744073709551555)
[pid 1853] <... futex resumed>) = ?
[pid 1853] +++ exited with 0 +++
[pid 1852] +++ exited with 0 +++
[pid 1851] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1851, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1854
./strace-static-x86_64: Process 1854 attached
[pid 1854] set_robust_list(0x5555560865e0, 24) = 0
[pid 1854] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1854] setpgid(0, 0) = 0
[pid 1854] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1854] write(3, "1000", 4) = 4
[pid 1854] close(3) = 0
[pid 1854] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1854] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1854] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1854] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1855], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1855
./strace-static-x86_64: Process 1855 attached
[pid 1854] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1855] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1854] <... futex resumed>) = 0
[pid 1854] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1855] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1855] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1855] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1854] <... futex resumed>) = 0
[pid 1854] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1854] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1855] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1855] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1855] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1854] <... futex resumed>) = 0
[pid 1854] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1854] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1855] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1855] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1854] <... futex resumed>) = 0
[pid 1854] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1854] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1854] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1854] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1855] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1854] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1856], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1856
[pid 1854] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 1856 attached
[pid 1854] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1856] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1856] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1855] <... umount2 resumed>) = 0
[pid 1855] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1856] <... umount2 resumed>) = 0
[pid 1856] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1854] <... futex resumed>) = 0
[pid 1854] exit_group(0) = ?
[pid 1856] <... futex resumed>) = ?
[pid 1855] +++ exited with 0 +++
[pid 1856] +++ exited with 0 +++
[pid 1854] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1854, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1857
./strace-static-x86_64: Process 1857 attached
[pid 1857] set_robust_list(0x5555560865e0, 24) = 0
[pid 1857] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1857] setpgid(0, 0) = 0
[pid 1857] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1857] write(3, "1000", 4) = 4
[pid 1857] close(3) = 0
[pid 1857] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1857] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1857] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1857] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1858 attached
<unfinished ...>
[pid 1858] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1858] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1857] <... clone resumed>, parent_tid=[1858], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1858
[pid 1857] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1858] <... futex resumed>) = 0
[pid 1858] mkdir("./file0", 000 <unfinished ...>
[pid 1857] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1858] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1858] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1857] <... futex resumed>) = 0
[pid 1857] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1857] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1858] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1858] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1857] <... futex resumed>) = 0
[pid 1858] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1857] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1858] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1857] <... futex resumed>) = 0
[pid 1858] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1857] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1858] <... mount resumed>) = 0
[pid 1858] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1857] <... futex resumed>) = 0
[pid 1858] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1857] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1858] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1857] <... futex resumed>) = 0
[pid 1858] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1857] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1857] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1858] <... umount2 resumed>) = 0
[pid 1857] <... mmap resumed>) = 0x7f236e446000
[pid 1858] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1857] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1858] <... futex resumed>) = 0
[pid 1857] <... mprotect resumed>) = 0
[pid 1858] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1857] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1859 attached
, parent_tid=[1859], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1859
[pid 1859] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1857] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1859] <... set_robust_list resumed>) = 0
[pid 1857] <... futex resumed>) = 0
[pid 1859] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1857] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1859] <... umount2 resumed>) = 0
[pid 1859] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1857] <... futex resumed>) = 0
[pid 1857] exit_group(0 <unfinished ...>
[pid 1859] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1857] <... exit_group resumed>) = ?
[pid 1859] <... futex resumed>) = ? <unavailable>
[pid 1858] <... futex resumed>) = ?
[pid 1858] +++ exited with 0 +++
[pid 1859] +++ exited with 0 +++
[pid 1857] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1857, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1860
./strace-static-x86_64: Process 1860 attached
[pid 1860] set_robust_list(0x5555560865e0, 24) = 0
[pid 1860] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1860] setpgid(0, 0) = 0
[pid 1860] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1860] write(3, "1000", 4) = 4
[pid 1860] close(3) = 0
[pid 1860] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1860] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1860] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1860] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1861], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1861
[pid 1860] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1860] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1861 attached
<unfinished ...>
[pid 1861] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1861] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1861] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1860] <... futex resumed>) = 0
[pid 1860] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1860] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1861] <... futex resumed>) = 1
[pid 1861] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1861] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1860] <... futex resumed>) = 0
[pid 1860] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1860] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1861] <... futex resumed>) = 1
[pid 1861] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1861] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1860] <... futex resumed>) = 0
[pid 1860] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1860] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1860] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1860] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1860] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1862 attached
, parent_tid=[1862], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1862
[pid 1860] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1860] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1861] <... futex resumed>) = 1
[pid 1861] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1862] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1861] <... umount2 resumed>) = 0
[pid 1861] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1861] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1862] umount2("./file0", MNT_DETACH) = 0
[pid 1862] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1860] <... futex resumed>) = 0
[pid 1860] exit_group(0) = ?
[pid 1861] <... futex resumed>) = ?
[pid 1861] +++ exited with 0 +++
[pid 1862] +++ exited with 0 +++
[pid 1860] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1860, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1863
./strace-static-x86_64: Process 1863 attached
[pid 1863] set_robust_list(0x5555560865e0, 24) = 0
[pid 1863] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1863] setpgid(0, 0) = 0
[pid 1863] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1863] write(3, "1000", 4) = 4
[pid 1863] close(3) = 0
[pid 1863] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1863] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1863] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1863] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1864 attached
<unfinished ...>
[pid 1864] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1864] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1863] <... clone resumed>, parent_tid=[1864], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1864
[pid 1863] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1864] <... futex resumed>) = 0
[pid 1863] <... futex resumed>) = 1
[pid 1864] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1864] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1864] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1863] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1863] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1864] <... futex resumed>) = 0
[pid 1864] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1863] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1864] <... mount resumed>) = 0
[pid 1864] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1864] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1863] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1863] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1864] <... futex resumed>) = 0
[pid 1864] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1863] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1864] <... mount resumed>) = 0
[pid 1864] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1864] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1863] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1863] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1864] <... futex resumed>) = 0
[pid 1864] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1863] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1864] <... umount2 resumed>) = 0
[pid 1864] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1864] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1863] <... futex resumed>) = 0
[pid 1863] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1863] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1863] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1865 attached
<unfinished ...>
[pid 1865] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1863] <... clone resumed>, parent_tid=[1865], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1865
[pid 1865] <... set_robust_list resumed>) = 0
[pid 1863] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1865] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1863] <... futex resumed>) = 0
[pid 1863] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1865] <... umount2 resumed>) = 0
[pid 1865] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1865] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1863] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1863] exit_group(0 <unfinished ...>
[pid 1864] <... futex resumed>) = ?
[pid 1863] <... exit_group resumed>) = ?
[pid 1864] +++ exited with 0 +++
[pid 1865] <... futex resumed>) = ?
[pid 1865] +++ exited with 0 +++
[pid 1863] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1863, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1866
./strace-static-x86_64: Process 1866 attached
[pid 1866] set_robust_list(0x5555560865e0, 24) = 0
[pid 1866] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1866] setpgid(0, 0) = 0
[pid 1866] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1866] write(3, "1000", 4) = 4
[pid 1866] close(3) = 0
[pid 1866] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1866] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1866] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1866] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1867 attached
, parent_tid=[1867], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1867
[pid 1867] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1866] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1867] <... set_robust_list resumed>) = 0
[pid 1866] <... futex resumed>) = 0
[pid 1866] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1867] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1867] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1866] <... futex resumed>) = 0
[pid 1867] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1866] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1867] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1866] <... futex resumed>) = 0
[pid 1867] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1866] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1867] <... mount resumed>) = 0
[pid 1867] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1866] <... futex resumed>) = 0
[pid 1867] <... futex resumed>) = 1
[pid 1866] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1867] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1866] <... futex resumed>) = 0
[pid 1866] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1867] <... mount resumed>) = 0
[pid 1867] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1866] <... futex resumed>) = 0
[pid 1866] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1866] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1866] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1866] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1867] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1866] <... mprotect resumed>) = 0
[pid 1866] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1867] <... umount2 resumed>) = 0
[pid 1866] <... clone resumed>, parent_tid=[1868], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1868
[pid 1866] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 1868 attached
[pid 1867] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1866] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1867] <... futex resumed>) = 0
[pid 1868] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1867] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1868] umount2("./file0", MNT_DETACH) = 0
[pid 1868] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1866] <... futex resumed>) = 0
[pid 1866] exit_group(0) = ?
[pid 1867] <... futex resumed>) = ?
[pid 1868] +++ exited with 0 +++
[pid 1867] +++ exited with 0 +++
[pid 1866] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1866, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1869
./strace-static-x86_64: Process 1869 attached
[pid 1869] set_robust_list(0x5555560865e0, 24) = 0
[pid 1869] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1869] setpgid(0, 0) = 0
[pid 1869] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1869] write(3, "1000", 4) = 4
[pid 1869] close(3) = 0
[pid 1869] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1869] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1869] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1869] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1870 attached
, parent_tid=[1870], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1870
[pid 1869] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1869] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1870] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1870] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1870] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1869] <... futex resumed>) = 0
[pid 1869] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1869] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1870] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1870] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1869] <... futex resumed>) = 0
[pid 1869] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1870] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1869] <... futex resumed>) = 0
[pid 1869] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1870] <... mount resumed>) = 0
[pid 1870] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1869] <... futex resumed>) = 0
[pid 1869] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1870] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1869] <... futex resumed>) = 0
[pid 1869] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1869] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1869] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1869] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1870] <... umount2 resumed>) = 0
[pid 1870] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1869] <... clone resumed>, parent_tid=[1871], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1871
[pid 1870] <... futex resumed>) = 0
[pid 1869] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1870] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1871 attached
<unfinished ...>
[pid 1871] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1869] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1871] <... set_robust_list resumed>) = 0
[pid 1871] umount2("./file0", MNT_DETACH) = 0
[pid 1871] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1871] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1869] <... futex resumed>) = 0
[pid 1869] exit_group(0) = ?
[pid 1870] <... futex resumed>) = ?
[pid 1870] +++ exited with 0 +++
[pid 1871] <... futex resumed>) = ?
[pid 1871] +++ exited with 0 +++
[pid 1869] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1869, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1872
./strace-static-x86_64: Process 1872 attached
[pid 1872] set_robust_list(0x5555560865e0, 24) = 0
[pid 1872] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1872] setpgid(0, 0) = 0
[pid 1872] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1872] write(3, "1000", 4) = 4
[pid 1872] close(3) = 0
[pid 1872] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1872] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1872] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1872] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1873 attached
, parent_tid=[1873], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1873
[pid 1873] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1872] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1873] <... set_robust_list resumed>) = 0
[pid 1872] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1873] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1873] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1872] <... futex resumed>) = 0
[pid 1872] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1872] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1873] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1873] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1872] <... futex resumed>) = 0
[pid 1872] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1873] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1872] <... futex resumed>) = 0
[pid 1873] <... mount resumed>) = 0
[pid 1872] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1873] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1872] <... futex resumed>) = 0
[pid 1872] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1872] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1872] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1872] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1872] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1874], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1874
[pid 1873] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1872] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1872] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1874 attached
<unfinished ...>
[pid 1874] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1873] <... umount2 resumed>) = 0
[pid 1874] <... set_robust_list resumed>) = 0
[pid 1874] umount2("./file0", MNT_DETACH) = 0
[pid 1873] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1874] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1872] <... futex resumed>) = 0
[pid 1873] <... futex resumed>) = 0
[pid 1872] exit_group(0 <unfinished ...>
[pid 1873] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1872] <... exit_group resumed>) = ?
[pid 1873] <... futex resumed>) = ? <unavailable>
[pid 1874] <... futex resumed>) = ?
[pid 1874] +++ exited with 0 +++
[pid 1873] +++ exited with 0 +++
[pid 1872] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1872, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1875
./strace-static-x86_64: Process 1875 attached
[pid 1875] set_robust_list(0x5555560865e0, 24) = 0
[pid 1875] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1875] setpgid(0, 0) = 0
[pid 1875] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1875] write(3, "1000", 4) = 4
[pid 1875] close(3) = 0
[pid 1875] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1875] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1875] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1875] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1876], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1876
[pid 1875] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1875] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1876 attached
<unfinished ...>
[pid 1876] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1876] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1876] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1875] <... futex resumed>) = 0
[pid 1875] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1875] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1876] <... futex resumed>) = 1
[pid 1876] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1876] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1875] <... futex resumed>) = 0
[pid 1875] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1875] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1876] <... futex resumed>) = 1
[pid 1876] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1876] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1875] <... futex resumed>) = 0
[pid 1875] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1875] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1875] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1875] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1875] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1877], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1877
[pid 1875] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1875] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1876] <... futex resumed>) = 1
[pid 1876] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 1877 attached
<unfinished ...>
[pid 1877] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1876] <... umount2 resumed>) = 0
[pid 1876] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1876] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1877] <... set_robust_list resumed>) = 0
[pid 1877] umount2("./file0", MNT_DETACH) = 0
[pid 1877] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1875] <... futex resumed>) = 0
[pid 1875] exit_group(0) = ?
[pid 1877] <... futex resumed>) = ?
[pid 1876] <... futex resumed>) = ?
[pid 1876] +++ exited with 0 +++
[pid 1877] +++ exited with 0 +++
[pid 1875] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1875, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1878
./strace-static-x86_64: Process 1878 attached
[pid 1878] set_robust_list(0x5555560865e0, 24) = 0
[pid 1878] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1878] setpgid(0, 0) = 0
[pid 1878] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1878] write(3, "1000", 4) = 4
[pid 1878] close(3) = 0
[pid 1878] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1878] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1878] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1878] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1879 attached
, parent_tid=[1879], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1879
[pid 1878] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1878] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1879] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1879] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1879] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1878] <... futex resumed>) = 0
[pid 1878] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1878] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1879] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1879] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1878] <... futex resumed>) = 0
[pid 1878] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1878] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1879] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1879] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1878] <... futex resumed>) = 0
[pid 1878] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1878] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1878] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1878] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1878] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1880], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1880
[pid 1879] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1878] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1878] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1880 attached
<unfinished ...>
[pid 1880] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1880] umount2("./file0", MNT_DETACH) = 0
[pid 1880] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1878] <... futex resumed>) = 0
[pid 1880] <... futex resumed>) = 1
[pid 1880] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1879] <... umount2 resumed>) = 0
[pid 1879] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1879] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1878] exit_group(0) = ?
[pid 1880] <... futex resumed>) = ?
[pid 1880] +++ exited with 0 +++
[pid 1879] <... futex resumed>) = ?
[pid 1879] +++ exited with 0 +++
[pid 1878] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1878, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1881
./strace-static-x86_64: Process 1881 attached
[pid 1881] set_robust_list(0x5555560865e0, 24) = 0
[pid 1881] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1881] setpgid(0, 0) = 0
[pid 1881] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1881] write(3, "1000", 4) = 4
[pid 1881] close(3) = 0
[pid 1881] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1881] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1881] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1881] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1882 attached
, parent_tid=[1882], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1882
[pid 1882] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1881] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1882] <... set_robust_list resumed>) = 0
[pid 1881] <... futex resumed>) = 0
[pid 1881] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1882] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1882] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1881] <... futex resumed>) = 0
[pid 1882] <... futex resumed>) = 1
[pid 1881] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1882] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1881] <... futex resumed>) = 0
[pid 1881] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1882] <... mount resumed>) = 0
[pid 1882] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1881] <... futex resumed>) = 0
[pid 1882] <... futex resumed>) = 1
[pid 1881] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1882] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1881] <... futex resumed>) = 0
[pid 1881] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1882] <... mount resumed>) = 0
[pid 1882] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1881] <... futex resumed>) = 0
[pid 1881] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1881] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1881] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1881] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1881] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1883], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1883
[pid 1881] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 1883 attached
[pid 1881] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1883] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1883] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1882] umount2("./file0", MNT_DETACH) = 0
[pid 1882] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1883] <... umount2 resumed>) = 0
[pid 1882] <... futex resumed>) = 0
[pid 1883] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1882] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1881] <... futex resumed>) = 0
[pid 1883] <... futex resumed>) = 1
[pid 1883] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1881] exit_group(0) = ?
[pid 1882] <... futex resumed>) = ?
[pid 1883] <... futex resumed>) = ?
[pid 1883] +++ exited with 0 +++
[pid 1882] +++ exited with 0 +++
[pid 1881] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1881, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1884
./strace-static-x86_64: Process 1884 attached
[pid 1884] set_robust_list(0x5555560865e0, 24) = 0
[pid 1884] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1884] setpgid(0, 0) = 0
[pid 1884] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1884] write(3, "1000", 4) = 4
[pid 1884] close(3) = 0
[pid 1884] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1884] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1884] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1884] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1885 attached
, parent_tid=[1885], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1885
[pid 1885] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1885] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1884] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1885] <... futex resumed>) = 0
[pid 1885] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1884] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1885] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1885] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1884] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1884] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1885] <... futex resumed>) = 0
[pid 1884] <... futex resumed>) = 1
[pid 1885] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1884] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1885] <... mount resumed>) = 0
[pid 1885] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1885] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1884] <... futex resumed>) = 0
[pid 1884] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1885] <... futex resumed>) = 0
[pid 1884] <... futex resumed>) = 1
[pid 1885] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1884] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1885] <... mount resumed>) = 0
[pid 1885] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1884] <... futex resumed>) = 0
[pid 1885] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1884] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1884] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1884] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1884] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1885] <... umount2 resumed>) = 0
[pid 1884] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1885] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1885] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1886 attached
<unfinished ...>
[pid 1886] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1884] <... clone resumed>, parent_tid=[1886], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1886
[pid 1886] <... set_robust_list resumed>) = 0
[pid 1884] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1886] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1884] <... futex resumed>) = 0
[pid 1884] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1886] <... umount2 resumed>) = 0
[pid 1886] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1886] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1884] <... futex resumed>) = 0
[pid 1884] exit_group(0) = ?
[pid 1885] <... futex resumed>) = ?
[pid 1885] +++ exited with 0 +++
[pid 1886] <... futex resumed>) = 231
[pid 1886] +++ exited with 0 +++
[pid 1884] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1884, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1887
./strace-static-x86_64: Process 1887 attached
[pid 1887] set_robust_list(0x5555560865e0, 24) = 0
[pid 1887] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1887] setpgid(0, 0) = 0
[pid 1887] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1887] write(3, "1000", 4) = 4
[pid 1887] close(3) = 0
[pid 1887] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1887] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1887] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1887] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1888 attached
<unfinished ...>
[pid 1888] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1888] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1887] <... clone resumed>, parent_tid=[1888], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1888
[pid 1887] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1888] <... futex resumed>) = 0
[pid 1887] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1888] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1888] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1888] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1887] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1887] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1888] <... futex resumed>) = 0
[pid 1888] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1887] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1888] <... mount resumed>) = 0
[pid 1888] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1887] <... futex resumed>) = 0
[pid 1887] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1887] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1888] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1888] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1887] <... futex resumed>) = 0
[pid 1887] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1887] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1887] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1887] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1888] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1887] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1889], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1889
[pid 1887] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1887] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1889 attached
<unfinished ...>
[pid 1888] <... umount2 resumed>) = 0
[pid 1889] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1889] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1888] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1888] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1889] <... umount2 resumed>) = 0
[pid 1889] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1887] <... futex resumed>) = 0
[pid 1887] exit_group(0) = ?
[pid 1889] <... futex resumed>) = ?
[pid 1889] +++ exited with 0 +++
[pid 1888] <... futex resumed>) = ?
[pid 1888] +++ exited with 0 +++
[pid 1887] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1887, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1890
./strace-static-x86_64: Process 1890 attached
[pid 1890] set_robust_list(0x5555560865e0, 24) = 0
[pid 1890] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1890] setpgid(0, 0) = 0
[pid 1890] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1890] write(3, "1000", 4) = 4
[pid 1890] close(3) = 0
[pid 1890] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1890] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1890] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1890] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1891], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1891
[pid 1890] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1890] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1891 attached
<unfinished ...>
[pid 1891] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1891] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1891] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1890] <... futex resumed>) = 0
[pid 1890] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1890] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1891] <... futex resumed>) = 1
[pid 1891] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1891] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1890] <... futex resumed>) = 0
[pid 1890] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1890] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1891] <... futex resumed>) = 1
[pid 1891] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1891] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1890] <... futex resumed>) = 0
[pid 1890] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1890] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1890] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1890] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1890] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1892], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1892
[pid 1890] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1890] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1891] <... futex resumed>) = 1
[pid 1891] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 1892 attached
) = 0
[pid 1891] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1892] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1891] <... futex resumed>) = 0
[pid 1892] <... set_robust_list resumed>) = 0
[pid 1891] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1892] umount2("./file0", MNT_DETACH) = 0
[pid 1892] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1890] <... futex resumed>) = 0
[pid 1890] exit_group(0 <unfinished ...>
[pid 1892] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1890] <... exit_group resumed>) = ?
[pid 1892] <... futex resumed>) = ?
[pid 1891] <... futex resumed>) = ?
[pid 1891] +++ exited with 0 +++
[pid 1892] +++ exited with 0 +++
[pid 1890] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1890, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1893
./strace-static-x86_64: Process 1893 attached
[pid 1893] set_robust_list(0x5555560865e0, 24) = 0
[pid 1893] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1893] setpgid(0, 0) = 0
[pid 1893] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1893] write(3, "1000", 4) = 4
[pid 1893] close(3) = 0
[pid 1893] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1893] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1893] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1893] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1894], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1894
[pid 1893] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1893] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1894 attached
<unfinished ...>
[pid 1894] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1894] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1894] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1893] <... futex resumed>) = 0
[pid 1893] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1893] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1894] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1894] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1893] <... futex resumed>) = 0
[pid 1893] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1893] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1894] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1894] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1893] <... futex resumed>) = 0
[pid 1893] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1893] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1893] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1893] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1893] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1895 attached
, parent_tid=[1895], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1895
[pid 1895] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1893] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1895] <... set_robust_list resumed>) = 0
[pid 1893] <... futex resumed>) = 0
[pid 1895] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1894] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1893] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1894] <... umount2 resumed>) = 0
[pid 1895] <... umount2 resumed>) = 0
[pid 1895] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1893] <... futex resumed>) = 0
[pid 1895] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1894] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1894] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1893] exit_group(0) = ?
[pid 1895] <... futex resumed>) = ?
[pid 1894] <... futex resumed>) = ?
[pid 1894] +++ exited with 0 +++
[pid 1895] +++ exited with 0 +++
[pid 1893] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1893, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1896
./strace-static-x86_64: Process 1896 attached
[pid 1896] set_robust_list(0x5555560865e0, 24) = 0
[pid 1896] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1896] setpgid(0, 0) = 0
[pid 1896] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1896] write(3, "1000", 4) = 4
[pid 1896] close(3) = 0
[pid 1896] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1896] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1896] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1896] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1897], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1897
[pid 1896] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1896] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1897 attached
<unfinished ...>
[pid 1897] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1897] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1897] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1896] <... futex resumed>) = 0
[pid 1896] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1896] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1897] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1897] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1896] <... futex resumed>) = 0
[pid 1896] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1896] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1897] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1897] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1896] <... futex resumed>) = 0
[pid 1897] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1896] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1896] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1896] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1897] <... umount2 resumed>) = 0
[pid 1896] <... mmap resumed>) = 0x7f236e446000
[pid 1897] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1896] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1897] <... futex resumed>) = 0
[pid 1896] <... mprotect resumed>) = 0
[pid 1897] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1896] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1898 attached
, parent_tid=[1898], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1898
[pid 1898] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1898] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1896] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1898] <... futex resumed>) = 0
[pid 1898] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1896] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1898] <... umount2 resumed>) = 0
[pid 1898] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1898] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1896] <... futex resumed>) = 0
[pid 1896] exit_group(0) = ?
[pid 1897] <... futex resumed>) = 231
[pid 1898] <... futex resumed>) = ?
[pid 1897] +++ exited with 0 +++
[pid 1898] +++ exited with 0 +++
[pid 1896] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1896, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1899
./strace-static-x86_64: Process 1899 attached
[pid 1899] set_robust_list(0x5555560865e0, 24) = 0
[pid 1899] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1899] setpgid(0, 0) = 0
[pid 1899] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1899] write(3, "1000", 4) = 4
[pid 1899] close(3) = 0
[pid 1899] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1899] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1899] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1899] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1900 attached
, parent_tid=[1900], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1900
[pid 1900] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1899] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1900] <... set_robust_list resumed>) = 0
[pid 1899] <... futex resumed>) = 0
[pid 1899] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1900] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1900] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1899] <... futex resumed>) = 0
[pid 1900] <... futex resumed>) = 1
[pid 1899] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1900] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1899] <... futex resumed>) = 0
[pid 1899] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1900] <... mount resumed>) = 0
[pid 1900] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1899] <... futex resumed>) = 0
[pid 1900] <... futex resumed>) = 1
[pid 1900] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1899] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1899] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1900] <... mount resumed>) = 0
[pid 1900] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1899] <... futex resumed>) = 0
[pid 1899] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1900] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1899] <... futex resumed>) = 0
[pid 1899] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1899] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1899] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1900] <... umount2 resumed>) = 0
[pid 1899] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1900] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 1901 attached
[pid 1900] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1899] <... clone resumed>, parent_tid=[1901], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1901
[pid 1901] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1899] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1901] <... set_robust_list resumed>) = 0
[pid 1899] <... futex resumed>) = 0
[pid 1901] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1899] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1901] <... umount2 resumed>) = 0
[pid 1901] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1899] <... futex resumed>) = 0
[pid 1901] <... futex resumed>) = 1
[pid 1899] exit_group(0 <unfinished ...>
[pid 1901] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 (errno 18446744073709551414)
[pid 1899] <... exit_group resumed>) = ?
[pid 1900] <... futex resumed>) = ?
[pid 1900] +++ exited with 0 +++
[pid 1901] +++ exited with 0 +++
[pid 1899] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1899, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1902
./strace-static-x86_64: Process 1902 attached
[pid 1902] set_robust_list(0x5555560865e0, 24) = 0
[pid 1902] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1902] setpgid(0, 0) = 0
[pid 1902] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1902] write(3, "1000", 4) = 4
[pid 1902] close(3) = 0
[pid 1902] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1902] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1902] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1902] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1903 attached
, parent_tid=[1903], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1903
[pid 1903] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1903] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1902] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1903] <... futex resumed>) = 0
[pid 1903] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1902] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1903] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1903] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1902] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1902] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1903] <... futex resumed>) = 0
[pid 1902] <... futex resumed>) = 1
[pid 1903] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1902] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1903] <... mount resumed>) = 0
[pid 1903] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1903] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1902] <... futex resumed>) = 0
[pid 1902] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1903] <... futex resumed>) = 0
[pid 1903] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1902] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1903] <... mount resumed>) = 0
[pid 1903] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1903] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1902] <... futex resumed>) = 0
[pid 1902] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1903] <... futex resumed>) = 0
[pid 1903] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1902] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1903] <... umount2 resumed>) = 0
[pid 1903] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1903] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1902] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1902] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1902] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1904 attached
, parent_tid=[1904], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1904
[pid 1902] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1902] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1904] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1904] umount2("./file0", MNT_DETACH) = 0
[pid 1904] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1902] <... futex resumed>) = 0
[pid 1904] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1902] exit_group(0) = ?
[pid 1903] <... futex resumed>) = ?
[pid 1903] +++ exited with 0 +++
[pid 1904] <... futex resumed>) = ?
[pid 1904] +++ exited with 0 +++
[pid 1902] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1902, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1905
./strace-static-x86_64: Process 1905 attached
[pid 1905] set_robust_list(0x5555560865e0, 24) = 0
[pid 1905] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1905] setpgid(0, 0) = 0
[pid 1905] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1905] write(3, "1000", 4) = 4
[pid 1905] close(3) = 0
[pid 1905] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1905] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1905] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1905] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1906 attached
<unfinished ...>
[pid 1906] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1906] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1905] <... clone resumed>, parent_tid=[1906], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1906
[pid 1905] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1906] <... futex resumed>) = 0
[pid 1906] mkdir("./file0", 000 <unfinished ...>
[pid 1905] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1906] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1906] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1906] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1905] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1905] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1906] <... futex resumed>) = 0
[pid 1905] <... futex resumed>) = 1
[pid 1906] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1905] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1906] <... mount resumed>) = 0
[pid 1906] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1906] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1905] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1905] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1906] <... futex resumed>) = 0
[pid 1906] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1905] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1906] <... mount resumed>) = 0
[pid 1906] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1906] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1905] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1905] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1906] <... futex resumed>) = 0
[pid 1906] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1905] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1906] <... umount2 resumed>) = 0
[pid 1906] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1906] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1905] <... futex resumed>) = 0
[pid 1905] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1905] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1905] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1907 attached
, parent_tid=[1907], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1907
[pid 1907] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1907] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1905] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1907] <... futex resumed>) = 0
[pid 1905] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1907] umount2("./file0", MNT_DETACH) = 0
[pid 1907] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1907] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1905] <... futex resumed>) = 0
[pid 1905] exit_group(0 <unfinished ...>
[pid 1906] <... futex resumed>) = ?
[pid 1905] <... exit_group resumed>) = ?
[pid 1906] +++ exited with 0 +++
[pid 1907] <... futex resumed>) = ?
[pid 1907] +++ exited with 0 +++
[pid 1905] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1905, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1908
./strace-static-x86_64: Process 1908 attached
[pid 1908] set_robust_list(0x5555560865e0, 24) = 0
[pid 1908] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1908] setpgid(0, 0) = 0
[pid 1908] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1908] write(3, "1000", 4) = 4
[pid 1908] close(3) = 0
[pid 1908] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1908] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1908] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1908] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1909 attached
<unfinished ...>
[pid 1909] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1909] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1908] <... clone resumed>, parent_tid=[1909], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1909
[pid 1908] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1909] <... futex resumed>) = 0
[pid 1908] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1909] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1909] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1909] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1908] <... futex resumed>) = 0
[pid 1908] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1909] <... futex resumed>) = 0
[pid 1908] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1909] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1909] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1908] <... futex resumed>) = 0
[pid 1908] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1908] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1909] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1909] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1908] <... futex resumed>) = 0
[pid 1909] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1908] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1908] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1908] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1909] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1909] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1908] <... mmap resumed>) = 0x7f236e446000
[pid 1908] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1908] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1909] <... umount2 resumed>) = 0
[pid 1908] <... clone resumed>, parent_tid=[1910], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1910
[pid 1908] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1908] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1910 attached
<unfinished ...>
[pid 1910] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1910] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1909] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1909] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1910] <... umount2 resumed>) = 0
[pid 1910] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1908] <... futex resumed>) = 0
[pid 1908] exit_group(0) = ?
[pid 1910] <... futex resumed>) = ?
[pid 1910] +++ exited with 0 +++
[pid 1909] <... futex resumed>) = ?
[pid 1909] +++ exited with 0 +++
[pid 1908] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1908, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1911
./strace-static-x86_64: Process 1911 attached
[pid 1911] set_robust_list(0x5555560865e0, 24) = 0
[pid 1911] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1911] setpgid(0, 0) = 0
[pid 1911] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1911] write(3, "1000", 4) = 4
[pid 1911] close(3) = 0
[pid 1911] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1911] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1911] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1911] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1912 attached
<unfinished ...>
[pid 1912] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1912] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1911] <... clone resumed>, parent_tid=[1912], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1912
[pid 1911] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1912] <... futex resumed>) = 0
[pid 1911] <... futex resumed>) = 1
[pid 1912] mkdir("./file0", 000 <unfinished ...>
[pid 1911] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1912] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1912] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1912] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1911] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1911] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1912] <... futex resumed>) = 0
[pid 1911] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1912] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1912] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1912] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1911] <... futex resumed>) = 0
[pid 1911] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1912] <... futex resumed>) = 0
[pid 1911] <... futex resumed>) = 1
[pid 1912] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1911] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1912] <... mount resumed>) = 0
[pid 1912] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1911] <... futex resumed>) = 0
[pid 1912] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1911] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1911] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1911] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1911] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1911] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1912] <... umount2 resumed>) = 0
[pid 1912] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1911] <... clone resumed>, parent_tid=[1913], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1913
[pid 1912] <... futex resumed>) = 0
[pid 1911] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1912] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1911] <... futex resumed>) = 0
./strace-static-x86_64: Process 1913 attached
[pid 1911] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1913] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1913] umount2("./file0", MNT_DETACH) = 0
[pid 1913] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1911] <... futex resumed>) = 0
[pid 1911] exit_group(0) = ?
[pid 1912] <... futex resumed>) = ?
[pid 1912] +++ exited with 0 +++
[pid 1913] +++ exited with 0 +++
[pid 1911] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1911, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1914
./strace-static-x86_64: Process 1914 attached
[pid 1914] set_robust_list(0x5555560865e0, 24) = 0
[pid 1914] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1914] setpgid(0, 0) = 0
[pid 1914] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1914] write(3, "1000", 4) = 4
[pid 1914] close(3) = 0
[pid 1914] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1914] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1914] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1914] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1915 attached
<unfinished ...>
[pid 1915] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1914] <... clone resumed>, parent_tid=[1915], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1915
[pid 1915] <... set_robust_list resumed>) = 0
[pid 1914] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1915] mkdir("./file0", 000 <unfinished ...>
[pid 1914] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1915] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1915] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1914] <... futex resumed>) = 0
[pid 1915] <... futex resumed>) = 1
[pid 1914] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1915] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1914] <... futex resumed>) = 0
[pid 1914] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1915] <... mount resumed>) = 0
[pid 1915] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1914] <... futex resumed>) = 0
[pid 1915] <... futex resumed>) = 1
[pid 1914] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1915] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1914] <... futex resumed>) = 0
[pid 1914] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1915] <... mount resumed>) = 0
[pid 1915] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1914] <... futex resumed>) = 0
[pid 1915] <... futex resumed>) = 1
[pid 1914] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1915] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1914] <... futex resumed>) = 0
[pid 1914] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1914] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1914] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1915] <... umount2 resumed>) = 0
[pid 1915] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1914] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1915] <... futex resumed>) = 0
./strace-static-x86_64: Process 1916 attached
[pid 1915] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1916] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1914] <... clone resumed>, parent_tid=[1916], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1916
[pid 1916] <... set_robust_list resumed>) = 0
[pid 1914] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1916] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1914] <... futex resumed>) = 0
[pid 1914] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1916] <... umount2 resumed>) = 0
[pid 1916] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1914] <... futex resumed>) = 0
[pid 1916] <... futex resumed>) = 1
[pid 1914] exit_group(0 <unfinished ...>
[pid 1916] ????( <unfinished ...>
[pid 1914] <... exit_group resumed>) = ?
[pid 1915] <... futex resumed>) = ?
[pid 1916] <... ???? resumed>) = ?
[pid 1915] +++ exited with 0 +++
[pid 1916] +++ exited with 0 +++
[pid 1914] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1914, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1917
./strace-static-x86_64: Process 1917 attached
[pid 1917] set_robust_list(0x5555560865e0, 24) = 0
[pid 1917] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1917] setpgid(0, 0) = 0
[pid 1917] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1917] write(3, "1000", 4) = 4
[pid 1917] close(3) = 0
[pid 1917] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1917] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1917] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1917] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1918 attached
<unfinished ...>
[pid 1918] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1918] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1917] <... clone resumed>, parent_tid=[1918], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1918
[pid 1917] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1918] <... futex resumed>) = 0
[pid 1917] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1918] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1918] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1918] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1917] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1917] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1918] <... futex resumed>) = 0
[pid 1917] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1918] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1918] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1918] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1917] <... futex resumed>) = 0
[pid 1917] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1918] <... futex resumed>) = 0
[pid 1917] <... futex resumed>) = 1
[pid 1918] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1917] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1918] <... mount resumed>) = 0
[pid 1918] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1918] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1917] <... futex resumed>) = 0
[pid 1917] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1918] <... futex resumed>) = 0
[pid 1917] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1918] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1917] <... futex resumed>) = 0
[pid 1917] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1917] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1917] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1919], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1919
./strace-static-x86_64: Process 1919 attached
[pid 1918] <... umount2 resumed>) = 0
[pid 1917] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1919] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1918] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1917] <... futex resumed>) = 0
[pid 1919] <... set_robust_list resumed>) = 0
[pid 1918] <... futex resumed>) = 0
[pid 1917] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1919] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1918] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1919] <... umount2 resumed>) = 0
[pid 1919] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1917] <... futex resumed>) = 0
[pid 1919] <... futex resumed>) = 1
[pid 1917] exit_group(0 <unfinished ...>
[pid 1919] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1918] <... futex resumed>) = ?
[pid 1919] <... futex resumed>) = ?
[pid 1917] <... exit_group resumed>) = ?
[pid 1918] +++ exited with 0 +++
[pid 1919] +++ exited with 0 +++
[pid 1917] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1917, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1920
./strace-static-x86_64: Process 1920 attached
[pid 1920] set_robust_list(0x5555560865e0, 24) = 0
[pid 1920] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1920] setpgid(0, 0) = 0
[pid 1920] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1920] write(3, "1000", 4) = 4
[pid 1920] close(3) = 0
[pid 1920] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1920] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1920] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1920] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1921 attached
, parent_tid=[1921], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1921
[pid 1921] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1921] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1920] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1921] <... futex resumed>) = 0
[pid 1921] mkdir("./file0", 000 <unfinished ...>
[pid 1920] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1921] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1921] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1921] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1920] <... futex resumed>) = 0
[pid 1920] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1921] <... futex resumed>) = 0
[pid 1920] <... futex resumed>) = 1
[pid 1921] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1921] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1921] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1920] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1920] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1921] <... futex resumed>) = 0
[pid 1921] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1920] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1921] <... mount resumed>) = 0
[pid 1921] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1921] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1920] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1920] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1921] <... futex resumed>) = 0
[pid 1920] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1921] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1920] <... futex resumed>) = 0
[pid 1921] <... umount2 resumed>) = 0
[pid 1921] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1921] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1920] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1920] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1920] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1922], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1922
./strace-static-x86_64: Process 1922 attached
[pid 1922] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1922] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1920] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1920] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1922] <... futex resumed>) = 0
[pid 1922] umount2("./file0", MNT_DETACH) = 0
[pid 1922] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1920] <... futex resumed>) = 0
[pid 1922] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1920] exit_group(0 <unfinished ...>
[pid 1921] <... futex resumed>) = ?
[pid 1921] +++ exited with 0 +++
[pid 1920] <... exit_group resumed>) = ?
[pid 1922] <... futex resumed>) = ?
[pid 1922] +++ exited with 0 +++
[pid 1920] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1920, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1923
./strace-static-x86_64: Process 1923 attached
[pid 1923] set_robust_list(0x5555560865e0, 24) = 0
[pid 1923] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1923] setpgid(0, 0) = 0
[pid 1923] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1923] write(3, "1000", 4) = 4
[pid 1923] close(3) = 0
[pid 1923] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1923] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1923] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1923] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1924 attached
, parent_tid=[1924], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1924
[pid 1924] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1924] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1923] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1924] <... futex resumed>) = 0
[pid 1924] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1924] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1924] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1923] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1923] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1924] <... futex resumed>) = 0
[pid 1924] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1923] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1924] <... mount resumed>) = 0
[pid 1924] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1924] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1923] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1923] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1924] <... futex resumed>) = 0
[pid 1923] <... futex resumed>) = 1
[pid 1924] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1923] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1924] <... mount resumed>) = 0
[pid 1924] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1924] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1923] <... futex resumed>) = 0
[pid 1923] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1924] <... futex resumed>) = 0
[pid 1924] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1923] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1924] <... umount2 resumed>) = 0
[pid 1924] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1924] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1923] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1923] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1923] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1925 attached
<unfinished ...>
[pid 1925] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1923] <... clone resumed>, parent_tid=[1925], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1925
[pid 1925] <... set_robust_list resumed>) = 0
[pid 1923] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1925] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1923] <... futex resumed>) = 0
[pid 1923] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1925] <... umount2 resumed>) = 0
[pid 1925] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1923] <... futex resumed>) = 0
[pid 1925] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1923] exit_group(0) = ?
[pid 1924] <... futex resumed>) = ?
[pid 1924] +++ exited with 0 +++
[pid 1925] <... futex resumed>) = ?
[pid 1925] +++ exited with 0 +++
[pid 1923] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1923, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 1926 attached
, child_tidptr=0x5555560865d0) = 1926
[pid 1926] set_robust_list(0x5555560865e0, 24) = 0
[pid 1926] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1926] setpgid(0, 0) = 0
[pid 1926] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1926] write(3, "1000", 4) = 4
[pid 1926] close(3) = 0
[pid 1926] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1926] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1926] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1926] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1927 attached
, parent_tid=[1927], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1927
[pid 1927] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1927] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1926] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1927] <... futex resumed>) = 0
[pid 1927] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1926] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1927] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1927] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1926] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1926] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1926] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1927] <... futex resumed>) = 0
[pid 1927] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1927] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1927] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1926] <... futex resumed>) = 0
[pid 1926] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1927] <... futex resumed>) = 0
[pid 1927] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1926] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1927] <... mount resumed>) = 0
[pid 1927] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1927] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1926] <... futex resumed>) = 0
[pid 1926] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1927] <... futex resumed>) = 0
[pid 1927] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1926] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1926] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1927] <... umount2 resumed>) = 0
[pid 1926] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1926] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1927] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1926] <... clone resumed>, parent_tid=[1928], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1928
[pid 1927] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1926] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1926] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1928 attached
<unfinished ...>
[pid 1928] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1928] umount2("./file0", MNT_DETACH) = 0
[pid 1928] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1926] <... futex resumed>) = 0
[pid 1926] exit_group(0 <unfinished ...>
[pid 1928] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1926] <... exit_group resumed>) = ?
[pid 1927] <... futex resumed>) = ?
[pid 1927] +++ exited with 0 +++
[pid 1928] <... futex resumed>) = ?
[pid 1928] +++ exited with 0 +++
[pid 1926] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1926, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1929
./strace-static-x86_64: Process 1929 attached
[pid 1929] set_robust_list(0x5555560865e0, 24) = 0
[pid 1929] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1929] setpgid(0, 0) = 0
[pid 1929] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1929] write(3, "1000", 4) = 4
[pid 1929] close(3) = 0
[pid 1929] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1929] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1929] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1929] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1930 attached
, parent_tid=[1930], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1930
[pid 1930] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1930] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1929] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1930] <... futex resumed>) = 0
[pid 1930] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1930] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1930] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1929] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1929] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1930] <... futex resumed>) = 0
[pid 1930] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1929] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1930] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1930] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1929] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1929] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1930] <... futex resumed>) = 0
[pid 1930] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1929] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1930] <... mount resumed>) = 0
[pid 1930] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1929] <... futex resumed>) = 0
[pid 1929] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1929] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1930] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1929] <... futex resumed>) = 0
[pid 1929] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1929] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1929] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1930] <... umount2 resumed>) = 0
[pid 1929] <... clone resumed>, parent_tid=[1931], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1931
./strace-static-x86_64: Process 1931 attached
[pid 1930] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1929] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1929] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1931] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1930] <... futex resumed>) = 0
[pid 1931] <... set_robust_list resumed>) = 0
[pid 1930] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1931] umount2("./file0", MNT_DETACH) = 0
[pid 1931] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1929] <... futex resumed>) = 0
[pid 1931] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1929] exit_group(0) = ?
[pid 1931] <... futex resumed>) = ?
[pid 1930] <... futex resumed>) = ?
[pid 1930] +++ exited with 0 +++
[pid 1931] +++ exited with 0 +++
[pid 1929] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1929, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1932
./strace-static-x86_64: Process 1932 attached
[pid 1932] set_robust_list(0x5555560865e0, 24) = 0
[pid 1932] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1932] setpgid(0, 0) = 0
[pid 1932] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1932] write(3, "1000", 4) = 4
[pid 1932] close(3) = 0
[pid 1932] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1932] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1932] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1932] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1933 attached
<unfinished ...>
[pid 1933] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1933] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1932] <... clone resumed>, parent_tid=[1933], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1933
[pid 1932] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1933] <... futex resumed>) = 0
[pid 1933] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1933] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1933] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1932] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1932] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1933] <... futex resumed>) = 0
[pid 1933] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1932] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1933] <... mount resumed>) = 0
[pid 1933] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1933] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1932] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1932] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1933] <... futex resumed>) = 0
[pid 1933] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1932] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1933] <... mount resumed>) = 0
[pid 1933] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1933] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1932] <... futex resumed>) = 0
[pid 1932] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1933] <... futex resumed>) = 0
[pid 1932] <... futex resumed>) = 1
[pid 1933] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1932] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1933] <... umount2 resumed>) = 0
[pid 1933] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1933] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1932] <... futex resumed>) = 0
[pid 1932] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1932] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1932] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1934 attached
<unfinished ...>
[pid 1934] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1932] <... clone resumed>, parent_tid=[1934], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1934
[pid 1932] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1934] <... set_robust_list resumed>) = 0
[pid 1932] <... futex resumed>) = 0
[pid 1934] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1932] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1934] <... umount2 resumed>) = 0
[pid 1934] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1934] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1932] <... futex resumed>) = 0
[pid 1932] exit_group(0 <unfinished ...>
[pid 1933] <... futex resumed>) = ?
[pid 1933] +++ exited with 0 +++
[pid 1932] <... exit_group resumed>) = ?
[pid 1934] <... futex resumed>) = ?
[pid 1934] +++ exited with 0 +++
[pid 1932] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1932, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1935
./strace-static-x86_64: Process 1935 attached
[pid 1935] set_robust_list(0x5555560865e0, 24) = 0
[pid 1935] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1935] setpgid(0, 0) = 0
[pid 1935] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1935] write(3, "1000", 4) = 4
[pid 1935] close(3) = 0
[pid 1935] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1935] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1935] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1935] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1936 attached
, parent_tid=[1936], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1936
[pid 1936] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1935] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1935] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1936] <... set_robust_list resumed>) = 0
[pid 1936] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1936] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1935] <... futex resumed>) = 0
[pid 1935] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1935] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1936] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1936] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1935] <... futex resumed>) = 0
[pid 1935] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1935] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1936] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1936] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1935] <... futex resumed>) = 0
[pid 1936] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1935] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1935] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1935] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1936] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1935] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1936] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1935] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1937], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1937
[pid 1935] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1935] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1937 attached
<unfinished ...>
[pid 1937] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1937] umount2("./file0", MNT_DETACH) = 0
[pid 1937] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1935] <... futex resumed>) = 0
[pid 1937] <... futex resumed>) = 1
[pid 1937] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1936] <... umount2 resumed>) = 0
[pid 1936] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1936] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1935] exit_group(0) = ?
[pid 1936] <... futex resumed>) = ?
[pid 1936] +++ exited with 0 +++
[pid 1937] <... futex resumed>) = ?
[pid 1937] +++ exited with 0 +++
[pid 1935] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1935, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1938
./strace-static-x86_64: Process 1938 attached
[pid 1938] set_robust_list(0x5555560865e0, 24) = 0
[pid 1938] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1938] setpgid(0, 0) = 0
[pid 1938] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1938] write(3, "1000", 4) = 4
[pid 1938] close(3) = 0
[pid 1938] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1938] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1938] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1938] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1939], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1939
./strace-static-x86_64: Process 1939 attached
[pid 1939] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1939] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1938] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1939] <... futex resumed>) = 0
[pid 1939] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1939] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1939] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1938] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1938] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1939] <... futex resumed>) = 0
[pid 1939] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1938] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1939] <... mount resumed>) = 0
[pid 1939] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1939] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1938] <... futex resumed>) = 0
[pid 1938] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1939] <... futex resumed>) = 0
[pid 1938] <... futex resumed>) = 1
[pid 1939] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1938] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1939] <... mount resumed>) = 0
[pid 1939] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1938] <... futex resumed>) = 0
[pid 1939] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1938] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1938] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1938] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1938] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1938] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1940], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1940
[pid 1938] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1938] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1939] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 1940 attached
[pid 1939] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1939] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1940] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1940] umount2("./file0", MNT_DETACH) = 0
[pid 1940] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1938] <... futex resumed>) = 0
[pid 1938] exit_group(0) = ?
[pid 1939] <... futex resumed>) = ?
[pid 1939] +++ exited with 0 +++
[pid 1940] +++ exited with 0 +++
[pid 1938] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1938, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1941
./strace-static-x86_64: Process 1941 attached
[pid 1941] set_robust_list(0x5555560865e0, 24) = 0
[pid 1941] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1941] setpgid(0, 0) = 0
[pid 1941] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1941] write(3, "1000", 4) = 4
[pid 1941] close(3) = 0
[pid 1941] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1941] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1941] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1941] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1942 attached
, parent_tid=[1942], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1942
[pid 1942] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1941] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1942] <... set_robust_list resumed>) = 0
[pid 1941] <... futex resumed>) = 0
[pid 1941] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1942] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1942] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1941] <... futex resumed>) = 0
[pid 1942] <... futex resumed>) = 1
[pid 1941] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1942] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1941] <... futex resumed>) = 0
[pid 1941] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1942] <... mount resumed>) = 0
[pid 1942] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1941] <... futex resumed>) = 0
[pid 1942] <... futex resumed>) = 1
[pid 1941] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1942] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1941] <... futex resumed>) = 0
[pid 1941] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1942] <... mount resumed>) = 0
[pid 1942] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1941] <... futex resumed>) = 0
[pid 1942] <... futex resumed>) = 1
[pid 1941] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1941] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1941] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1941] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1941] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1943 attached
, parent_tid=[1943], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1943
[pid 1943] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1941] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1943] <... set_robust_list resumed>) = 0
[pid 1941] <... futex resumed>) = 0
[pid 1943] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1941] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1942] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1943] <... umount2 resumed>) = 0
[pid 1943] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1941] <... futex resumed>) = 0
[pid 1943] <... futex resumed>) = 1
[pid 1943] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1942] <... umount2 resumed>) = 0
[pid 1942] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1942] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1941] exit_group(0) = ?
[pid 1943] <... futex resumed>) = ?
[pid 1942] <... futex resumed>) = ?
[pid 1942] +++ exited with 0 +++
[pid 1943] +++ exited with 0 +++
[pid 1941] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1941, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1944
./strace-static-x86_64: Process 1944 attached
[pid 1944] set_robust_list(0x5555560865e0, 24) = 0
[pid 1944] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1944] setpgid(0, 0) = 0
[pid 1944] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1944] write(3, "1000", 4) = 4
[pid 1944] close(3) = 0
[pid 1944] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1944] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1944] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1944] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1945], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1945
./strace-static-x86_64: Process 1945 attached
[pid 1944] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1945] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1945] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1945] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1944] <... futex resumed>) = 0
[pid 1945] <... futex resumed>) = 0
[pid 1945] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1944] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1944] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1945] <... futex resumed>) = 0
[pid 1944] <... futex resumed>) = 1
[pid 1945] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1944] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1945] <... mount resumed>) = 0
[pid 1945] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1945] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1944] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1944] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1944] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1945] <... futex resumed>) = 0
[pid 1945] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1945] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1944] <... futex resumed>) = 0
[pid 1945] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1944] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1944] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1944] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1944] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1944] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1945] <... umount2 resumed>) = 0
[pid 1945] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1945] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1944] <... clone resumed>, parent_tid=[1946], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1946
./strace-static-x86_64: Process 1946 attached
[pid 1944] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1946] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1944] <... futex resumed>) = 0
[pid 1946] <... set_robust_list resumed>) = 0
[pid 1946] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1944] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1946] <... umount2 resumed>) = 0
[pid 1946] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1944] <... futex resumed>) = 0
[pid 1946] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1944] exit_group(0) = ?
[pid 1945] <... futex resumed>) = ?
[pid 1945] +++ exited with 0 +++
[pid 1946] <... futex resumed>) = ?
[pid 1946] +++ exited with 0 +++
[pid 1944] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1944, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1947
./strace-static-x86_64: Process 1947 attached
[pid 1947] set_robust_list(0x5555560865e0, 24) = 0
[pid 1947] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1947] setpgid(0, 0) = 0
[pid 1947] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1947] write(3, "1000", 4) = 4
[pid 1947] close(3) = 0
[pid 1947] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1947] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1947] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1947] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1948 attached
, parent_tid=[1948], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1948
[pid 1948] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1947] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1948] <... set_robust_list resumed>) = 0
[pid 1947] <... futex resumed>) = 0
[pid 1948] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1948] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1947] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1948] <... futex resumed>) = 0
[pid 1948] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1947] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1947] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1948] <... futex resumed>) = 0
[pid 1947] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1948] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1948] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1948] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1947] <... futex resumed>) = 0
[pid 1947] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1948] <... futex resumed>) = 0
[pid 1947] <... futex resumed>) = 1
[pid 1948] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1947] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1948] <... mount resumed>) = 0
[pid 1948] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1947] <... futex resumed>) = 0
[pid 1947] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1947] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1947] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1947] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1947] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1948] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1947] <... clone resumed>, parent_tid=[1949], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1949
[pid 1948] <... umount2 resumed>) = 0
[pid 1947] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1947] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1949 attached
<unfinished ...>
[pid 1949] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1949] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1948] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1948] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1949] <... umount2 resumed>) = 0
[pid 1949] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1947] <... futex resumed>) = 0
[pid 1947] exit_group(0) = ?
[pid 1948] <... futex resumed>) = ?
[pid 1948] +++ exited with 0 +++
[pid 1949] <... futex resumed>) = ?
[pid 1949] +++ exited with 0 +++
[pid 1947] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1947, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1950
./strace-static-x86_64: Process 1950 attached
[pid 1950] set_robust_list(0x5555560865e0, 24) = 0
[pid 1950] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1950] setpgid(0, 0) = 0
[pid 1950] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1950] write(3, "1000", 4) = 4
[pid 1950] close(3) = 0
[pid 1950] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1950] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1950] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1950] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1951 attached
, parent_tid=[1951], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1951
[pid 1951] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1950] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1951] <... set_robust_list resumed>) = 0
[pid 1950] <... futex resumed>) = 0
[pid 1950] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1951] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1951] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1950] <... futex resumed>) = 0
[pid 1950] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1950] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1951] <... futex resumed>) = 1
[pid 1951] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1951] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1950] <... futex resumed>) = 0
[pid 1950] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1950] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1951] <... futex resumed>) = 1
[pid 1951] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1951] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1950] <... futex resumed>) = 0
[pid 1950] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1950] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1950] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1950] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1950] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1952 attached
, parent_tid=[1952], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1952
[pid 1950] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1950] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1951] <... futex resumed>) = 1
[pid 1951] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1952] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1951] <... umount2 resumed>) = 0
[pid 1951] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1951] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1952] <... set_robust_list resumed>) = 0
[pid 1952] umount2("./file0", MNT_DETACH) = 0
[pid 1952] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1950] <... futex resumed>) = 0
[pid 1950] exit_group(0) = ?
[pid 1951] <... futex resumed>) = ?
[pid 1951] +++ exited with 0 +++
[pid 1952] +++ exited with 0 +++
[pid 1950] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1950, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1953
./strace-static-x86_64: Process 1953 attached
[pid 1953] set_robust_list(0x5555560865e0, 24) = 0
[pid 1953] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1953] setpgid(0, 0) = 0
[pid 1953] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1953] write(3, "1000", 4) = 4
[pid 1953] close(3) = 0
[pid 1953] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1953] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1953] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1953] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1954 attached
, parent_tid=[1954], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1954
[pid 1954] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1953] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1953] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1954] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1954] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1953] <... futex resumed>) = 0
[pid 1954] <... futex resumed>) = 1
[pid 1953] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1954] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1953] <... futex resumed>) = 0
[pid 1953] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1954] <... mount resumed>) = 0
[pid 1954] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1953] <... futex resumed>) = 0
[pid 1954] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1953] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1954] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1953] <... futex resumed>) = 0
[pid 1954] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1953] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1954] <... mount resumed>) = 0
[pid 1954] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1953] <... futex resumed>) = 0
[pid 1953] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1953] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1953] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1953] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1953] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1954] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1953] <... clone resumed>, parent_tid=[1955], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1955
[pid 1953] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1953] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1955 attached
<unfinished ...>
[pid 1955] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1955] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1954] <... umount2 resumed>) = 0
[pid 1954] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1955] <... umount2 resumed>) = 0
[pid 1955] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1953] <... futex resumed>) = 0
[pid 1953] exit_group(0 <unfinished ...>
[pid 1954] <... futex resumed>) = 0
[pid 1953] <... exit_group resumed>) = ?
[pid 1955] <... futex resumed>) = ?
[pid 1955] +++ exited with 0 +++
[pid 1954] +++ exited with 0 +++
[pid 1953] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1953, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1956
./strace-static-x86_64: Process 1956 attached
[pid 1956] set_robust_list(0x5555560865e0, 24) = 0
[pid 1956] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1956] setpgid(0, 0) = 0
[pid 1956] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1956] write(3, "1000", 4) = 4
[pid 1956] close(3) = 0
[pid 1956] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1956] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1956] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1956] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1957 attached
, parent_tid=[1957], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1957
[pid 1957] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1957] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1956] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1957] <... futex resumed>) = 0
[pid 1956] <... futex resumed>) = 1
[pid 1956] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1957] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1957] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1957] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1956] <... futex resumed>) = 0
[pid 1956] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1957] <... futex resumed>) = 0
[pid 1956] <... futex resumed>) = 1
[pid 1957] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1956] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1957] <... mount resumed>) = 0
[pid 1957] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1956] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1957] <... futex resumed>) = 0
[pid 1956] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1957] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1956] <... futex resumed>) = 0
[pid 1956] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1957] <... mount resumed>) = 0
[pid 1957] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1956] <... futex resumed>) = 0
[pid 1957] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1956] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1956] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1956] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1956] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1957] <... umount2 resumed>) = 0
[pid 1957] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1957] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1956] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1958 attached
<unfinished ...>
[pid 1958] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1956] <... clone resumed>, parent_tid=[1958], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1958
[pid 1958] <... set_robust_list resumed>) = 0
[pid 1956] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1958] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1956] <... futex resumed>) = 0
[pid 1956] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1958] <... umount2 resumed>) = 0
[pid 1958] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1956] <... futex resumed>) = 0
[pid 1958] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1956] exit_group(0) = ?
[pid 1957] <... futex resumed>) = ?
[pid 1957] +++ exited with 0 +++
[pid 1958] <... futex resumed>) = ?
[pid 1958] +++ exited with 0 +++
[pid 1956] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1956, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1959
./strace-static-x86_64: Process 1959 attached
[pid 1959] set_robust_list(0x5555560865e0, 24) = 0
[pid 1959] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1959] setpgid(0, 0) = 0
[pid 1959] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1959] write(3, "1000", 4) = 4
[pid 1959] close(3) = 0
[pid 1959] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1959] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1959] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1959] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1960 attached
, parent_tid=[1960], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1960
[pid 1960] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1960] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1959] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1960] <... futex resumed>) = 0
[pid 1960] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1959] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1960] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1960] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1959] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1959] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1960] <... futex resumed>) = 0
[pid 1959] <... futex resumed>) = 1
[pid 1959] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1960] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1960] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1959] <... futex resumed>) = 0
[pid 1960] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1959] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1959] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1960] <... mount resumed>) = 0
[pid 1960] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1959] <... futex resumed>) = 0
[pid 1960] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1959] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1959] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1959] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1959] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1960] <... umount2 resumed>) = 0
[pid 1959] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1960] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1960] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1961 attached
<unfinished ...>
[pid 1959] <... clone resumed>, parent_tid=[1961], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1961
[pid 1961] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1959] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1961] <... set_robust_list resumed>) = 0
[pid 1959] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1961] umount2("./file0", MNT_DETACH) = 0
[pid 1961] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1959] <... futex resumed>) = 0
[pid 1961] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1959] exit_group(0) = ?
[pid 1960] <... futex resumed>) = ?
[pid 1960] +++ exited with 0 +++
[pid 1961] <... futex resumed>) = ?
[pid 1961] +++ exited with 0 +++
[pid 1959] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1959, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1962
./strace-static-x86_64: Process 1962 attached
[pid 1962] set_robust_list(0x5555560865e0, 24) = 0
[pid 1962] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1962] setpgid(0, 0) = 0
[pid 1962] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1962] write(3, "1000", 4) = 4
[pid 1962] close(3) = 0
[pid 1962] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1962] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1962] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1962] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1963 attached
, parent_tid=[1963], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1963
[pid 1963] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1962] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1963] <... set_robust_list resumed>) = 0
[pid 1962] <... futex resumed>) = 0
[pid 1962] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1963] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1963] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1962] <... futex resumed>) = 0
[pid 1963] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1962] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1963] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1962] <... futex resumed>) = 0
[pid 1963] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1962] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1963] <... mount resumed>) = 0
[pid 1963] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1962] <... futex resumed>) = 0
[pid 1962] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1963] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1962] <... futex resumed>) = 0
[pid 1962] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1963] <... mount resumed>) = 0
[pid 1963] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1962] <... futex resumed>) = 0
[pid 1963] <... futex resumed>) = 1
[pid 1962] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1963] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1962] <... futex resumed>) = 0
[pid 1962] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1962] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1962] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1963] <... umount2 resumed>) = 0
[pid 1962] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1964], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1964
[pid 1962] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1962] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1963] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1963] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 1964 attached
<unfinished ...>
[pid 1964] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1964] umount2("./file0", MNT_DETACH) = 0
[pid 1964] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1962] <... futex resumed>) = 0
[pid 1962] exit_group(0) = ?
[pid 1963] <... futex resumed>) = ?
[pid 1963] +++ exited with 0 +++
[pid 1964] +++ exited with 0 +++
[pid 1962] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1962, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1965
./strace-static-x86_64: Process 1965 attached
[pid 1965] set_robust_list(0x5555560865e0, 24) = 0
[pid 1965] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1965] setpgid(0, 0) = 0
[pid 1965] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1965] write(3, "1000", 4) = 4
[pid 1965] close(3) = 0
[pid 1965] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1965] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1965] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1965] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1966 attached
, parent_tid=[1966], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1966
[pid 1966] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1965] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1966] <... set_robust_list resumed>) = 0
[pid 1965] <... futex resumed>) = 0
[pid 1965] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1966] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1966] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1965] <... futex resumed>) = 0
[pid 1966] <... futex resumed>) = 1
[pid 1965] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1966] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1965] <... futex resumed>) = 0
[pid 1965] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1966] <... mount resumed>) = 0
[pid 1966] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1965] <... futex resumed>) = 0
[pid 1966] <... futex resumed>) = 1
[pid 1965] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1966] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1965] <... futex resumed>) = 0
[pid 1965] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1966] <... mount resumed>) = 0
[pid 1966] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1965] <... futex resumed>) = 0
[pid 1966] <... futex resumed>) = 1
[pid 1965] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1966] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1965] <... futex resumed>) = 0
[pid 1965] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1965] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1965] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1966] <... umount2 resumed>) = 0
[pid 1965] <... mprotect resumed>) = 0
[pid 1965] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1967 attached
, parent_tid=[1967], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1967
[pid 1967] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1965] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1967] <... set_robust_list resumed>) = 0
[pid 1965] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1967] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1966] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1967] <... umount2 resumed>) = 0
[pid 1966] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1967] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1965] <... futex resumed>) = 0
[pid 1967] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1965] exit_group(0) = ?
[pid 1967] <... futex resumed>) = ?
[pid 1967] +++ exited with 0 +++
[pid 1966] <... futex resumed>) = ?
[pid 1966] +++ exited with 0 +++
[pid 1965] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1965, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1968
./strace-static-x86_64: Process 1968 attached
[pid 1968] set_robust_list(0x5555560865e0, 24) = 0
[pid 1968] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1968] setpgid(0, 0) = 0
[pid 1968] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1968] write(3, "1000", 4) = 4
[pid 1968] close(3) = 0
[pid 1968] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1968] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1968] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1968] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1969 attached
<unfinished ...>
[pid 1969] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1969] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1968] <... clone resumed>, parent_tid=[1969], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1969
[pid 1968] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1969] <... futex resumed>) = 0
[pid 1969] mkdir("./file0", 000 <unfinished ...>
[pid 1968] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1969] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1969] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1969] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1968] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1968] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1969] <... futex resumed>) = 0
[pid 1969] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1968] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1969] <... mount resumed>) = 0
[pid 1969] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1968] <... futex resumed>) = 0
[pid 1969] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1968] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1969] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1968] <... futex resumed>) = 0
[pid 1969] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1968] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1969] <... mount resumed>) = 0
[pid 1969] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1968] <... futex resumed>) = 0
[pid 1969] <... futex resumed>) = 1
[pid 1968] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1969] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1968] <... futex resumed>) = 0
[pid 1968] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1968] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1968] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1968] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1970], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1970
[pid 1969] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 1970 attached
[pid 1968] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1970] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1969] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1970] <... set_robust_list resumed>) = 0
[pid 1968] <... futex resumed>) = 0
[pid 1969] <... futex resumed>) = 0
[pid 1970] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1968] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1969] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1970] <... umount2 resumed>) = 0
[pid 1970] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1968] <... futex resumed>) = 0
[pid 1970] <... futex resumed>) = 1
[pid 1968] exit_group(0 <unfinished ...>
[pid 1970] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1968] <... exit_group resumed>) = ?
[pid 1970] <... futex resumed>) = ?
[pid 1969] <... futex resumed>) = ?
[pid 1969] +++ exited with 0 +++
[pid 1970] +++ exited with 0 +++
[pid 1968] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1968, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1971
./strace-static-x86_64: Process 1971 attached
[pid 1971] set_robust_list(0x5555560865e0, 24) = 0
[pid 1971] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1971] setpgid(0, 0) = 0
[pid 1971] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1971] write(3, "1000", 4) = 4
[pid 1971] close(3) = 0
[pid 1971] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1971] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1971] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1971] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1972 attached
, parent_tid=[1972], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1972
[pid 1972] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1972] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1971] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1972] mkdir("./file0", 000 <unfinished ...>
[pid 1971] <... futex resumed>) = 0
[pid 1972] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1972] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1972] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1971] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1971] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1972] <... futex resumed>) = 0
[pid 1972] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1971] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1972] <... mount resumed>) = 0
[pid 1972] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1972] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1971] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1971] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1972] <... futex resumed>) = 0
[pid 1971] <... futex resumed>) = 1
[pid 1972] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1971] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1972] <... mount resumed>) = 0
[pid 1972] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1972] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1971] <... futex resumed>) = 0
[pid 1971] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1972] <... futex resumed>) = 0
[pid 1971] <... futex resumed>) = 1
[pid 1972] umount2("./file0", MNT_DETACH) = 0
[pid 1971] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1972] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1972] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1971] <... futex resumed>) = 0
[pid 1971] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1971] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1971] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1973 attached
, parent_tid=[1973], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1973
[pid 1973] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1973] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1971] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1973] <... futex resumed>) = 0
[pid 1973] umount2("./file0", MNT_DETACH) = 0
[pid 1973] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1973] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1971] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1971] exit_group(0 <unfinished ...>
[pid 1972] <... futex resumed>) = ?
[pid 1971] <... exit_group resumed>) = ?
[pid 1972] +++ exited with 0 +++
[pid 1973] <... futex resumed>) = ?
[pid 1973] +++ exited with 0 +++
[pid 1971] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1971, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1974
./strace-static-x86_64: Process 1974 attached
[pid 1974] set_robust_list(0x5555560865e0, 24) = 0
[pid 1974] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1974] setpgid(0, 0) = 0
[pid 1974] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1974] write(3, "1000", 4) = 4
[pid 1974] close(3) = 0
[pid 1974] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1974] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1974] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1974] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1975 attached
<unfinished ...>
[pid 1975] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1975] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1974] <... clone resumed>, parent_tid=[1975], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1975
[pid 1974] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1975] <... futex resumed>) = 0
[pid 1975] mkdir("./file0", 000 <unfinished ...>
[pid 1974] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1975] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 1975] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1974] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1975] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1974] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1975] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1974] <... futex resumed>) = 0
[pid 1975] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1974] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1975] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1975] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1974] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1974] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1975] <... futex resumed>) = 0
[pid 1975] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1974] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1975] <... mount resumed>) = 0
[pid 1975] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1975] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1974] <... futex resumed>) = 0
[pid 1974] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1975] <... futex resumed>) = 0
[pid 1974] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1975] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1974] <... futex resumed>) = 0
[pid 1974] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1975] <... umount2 resumed>) = 0
[pid 1974] <... mmap resumed>) = 0x7f236e446000
[pid 1975] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1974] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 1975] <... futex resumed>) = 0
[pid 1974] <... mprotect resumed>) = 0
[pid 1975] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1974] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1976 attached
, parent_tid=[1976], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1976
[pid 1976] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1974] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1976] <... set_robust_list resumed>) = 0
[pid 1974] <... futex resumed>) = 0
[pid 1976] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1974] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1976] <... umount2 resumed>) = 0
[pid 1976] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1974] <... futex resumed>) = 0
[pid 1974] exit_group(0 <unfinished ...>
[pid 1976] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1974] <... exit_group resumed>) = ?
[pid 1975] <... futex resumed>) = ?
[pid 1976] <... futex resumed>) = ?
[pid 1975] +++ exited with 0 +++
[pid 1976] +++ exited with 0 +++
[pid 1974] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1974, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1977
./strace-static-x86_64: Process 1977 attached
[pid 1977] set_robust_list(0x5555560865e0, 24) = 0
[pid 1977] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1977] setpgid(0, 0) = 0
[pid 1977] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1977] write(3, "1000", 4) = 4
[pid 1977] close(3) = 0
[pid 1977] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1977] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1977] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1977] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1978 attached
, parent_tid=[1978], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1978
[pid 1978] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1977] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1978] <... set_robust_list resumed>) = 0
[pid 1977] <... futex resumed>) = 0
[pid 1977] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1978] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1978] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1977] <... futex resumed>) = 0
[pid 1978] <... futex resumed>) = 1
[pid 1977] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1978] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1977] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1978] <... mount resumed>) = 0
[pid 1978] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1977] <... futex resumed>) = 0
[pid 1978] <... futex resumed>) = 1
[pid 1977] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1978] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1977] <... futex resumed>) = 0
[pid 1977] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1978] <... mount resumed>) = 0
[pid 1978] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1977] <... futex resumed>) = 0
[pid 1978] <... futex resumed>) = 1
[pid 1977] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1978] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1977] <... futex resumed>) = 0
[pid 1977] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1977] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1977] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1977] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1979], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1979
./strace-static-x86_64: Process 1979 attached
[pid 1978] <... umount2 resumed>) = 0
[pid 1977] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1979] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1978] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1977] <... futex resumed>) = 0
[pid 1979] <... set_robust_list resumed>) = 0
[pid 1978] <... futex resumed>) = 0
[pid 1977] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1979] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1978] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1979] <... umount2 resumed>) = 0
[pid 1979] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1977] <... futex resumed>) = 0
[pid 1977] exit_group(0 <unfinished ...>
[pid 1979] ????( <unfinished ...>
[pid 1978] <... futex resumed>) = ?
[pid 1977] <... exit_group resumed>) = ?
[pid 1979] <... ???? resumed>) = ?
[pid 1978] +++ exited with 0 +++
[pid 1979] +++ exited with 0 +++
[pid 1977] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1977, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1980
./strace-static-x86_64: Process 1980 attached
[pid 1980] set_robust_list(0x5555560865e0, 24) = 0
[pid 1980] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1980] setpgid(0, 0) = 0
[pid 1980] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1980] write(3, "1000", 4) = 4
[pid 1980] close(3) = 0
[pid 1980] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1980] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1980] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1980] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1981 attached
<unfinished ...>
[pid 1981] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1980] <... clone resumed>, parent_tid=[1981], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1981
[pid 1981] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1980] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1981] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1980] <... futex resumed>) = 0
[pid 1981] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1981] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1981] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1980] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1980] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1981] <... futex resumed>) = 0
[pid 1980] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1981] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1981] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1981] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1980] <... futex resumed>) = 0
[pid 1980] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1981] <... futex resumed>) = 0
[pid 1981] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1980] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1981] <... mount resumed>) = 0
[pid 1981] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1980] <... futex resumed>) = 0
[pid 1980] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1980] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1980] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1980] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1981] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1980] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1981] <... umount2 resumed>) = 0
[pid 1980] <... clone resumed>, parent_tid=[1982], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1982
[pid 1980] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1980] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1981] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1982 attached
<unfinished ...>
[pid 1982] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1982] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1981] <... futex resumed>) = 0
[pid 1981] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1982] <... umount2 resumed>) = 0
[pid 1982] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1980] <... futex resumed>) = 0
[pid 1982] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1980] exit_group(0) = ?
[pid 1981] <... futex resumed>) = ?
[pid 1982] <... futex resumed>) = ?
[pid 1981] +++ exited with 0 +++
[pid 1982] +++ exited with 0 +++
[pid 1980] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1980, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1983
./strace-static-x86_64: Process 1983 attached
[pid 1983] set_robust_list(0x5555560865e0, 24) = 0
[pid 1983] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1983] setpgid(0, 0) = 0
[pid 1983] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1983] write(3, "1000", 4) = 4
[pid 1983] close(3) = 0
[pid 1983] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1983] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1983] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1983] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1984 attached
, parent_tid=[1984], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1984
[pid 1984] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 1983] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1984] <... set_robust_list resumed>) = 0
[pid 1983] <... futex resumed>) = 0
[pid 1983] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1984] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1984] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1983] <... futex resumed>) = 0
[pid 1984] <... futex resumed>) = 1
[pid 1983] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1984] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1983] <... futex resumed>) = 0
[pid 1983] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1984] <... mount resumed>) = 0
[pid 1984] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1983] <... futex resumed>) = 0
[pid 1984] <... futex resumed>) = 1
[pid 1983] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1984] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1983] <... futex resumed>) = 0
[pid 1983] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1984] <... mount resumed>) = 0
[pid 1984] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1983] <... futex resumed>) = 0
[pid 1984] <... futex resumed>) = 1
[pid 1983] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1984] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1983] <... futex resumed>) = 0
[pid 1983] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1983] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1983] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1984] <... umount2 resumed>) = 0
[pid 1983] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1984] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 1985 attached
) = 0
[pid 1985] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1984] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1983] <... clone resumed>, parent_tid=[1985], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1985
[pid 1985] <... set_robust_list resumed>) = 0
[pid 1983] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1985] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1983] <... futex resumed>) = 0
[pid 1983] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1985] <... umount2 resumed>) = 0
[pid 1985] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1983] <... futex resumed>) = 0
[pid 1985] <... futex resumed>) = 1
[pid 1983] exit_group(0 <unfinished ...>
[pid 1985] ????( <unfinished ...>
[pid 1983] <... exit_group resumed>) = ?
[pid 1984] <... futex resumed>) = ?
[pid 1984] +++ exited with 0 +++
[pid 1985] <... ???? resumed>) = ?
[pid 1985] +++ exited with 0 +++
[pid 1983] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1983, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1986
./strace-static-x86_64: Process 1986 attached
[pid 1986] set_robust_list(0x5555560865e0, 24) = 0
[pid 1986] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1986] setpgid(0, 0) = 0
[pid 1986] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1986] write(3, "1000", 4) = 4
[pid 1986] close(3) = 0
[pid 1986] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1986] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1986] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1986] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1987 attached
<unfinished ...>
[pid 1987] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1987] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1986] <... clone resumed>, parent_tid=[1987], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1987
[pid 1986] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1987] <... futex resumed>) = 0
[pid 1987] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1987] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1987] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1986] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1986] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1987] <... futex resumed>) = 0
[pid 1987] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1986] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1987] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1987] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1986] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1986] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1987] <... futex resumed>) = 0
[pid 1987] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 1986] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1987] <... mount resumed>) = 0
[pid 1987] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1987] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1986] <... futex resumed>) = 0
[pid 1986] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1987] <... futex resumed>) = 0
[pid 1987] umount2("./file0", MNT_DETACH) = 0
[pid 1987] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1987] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1986] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1987] <... futex resumed>) = 0
[pid 1987] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1986] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1987] <... umount2 resumed>) = 0
[pid 1987] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1987] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1986] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 1986] exit_group(0) = ?
[pid 1987] <... futex resumed>) = ?
[pid 1987] +++ exited with 0 +++
[pid 1986] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1986, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1988
./strace-static-x86_64: Process 1988 attached
[pid 1988] set_robust_list(0x5555560865e0, 24) = 0
[pid 1988] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1988] setpgid(0, 0) = 0
[pid 1988] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1988] write(3, "1000", 4) = 4
[pid 1988] close(3) = 0
[pid 1988] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1988] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1988] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1988] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1989], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1989
[pid 1988] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1988] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1989 attached
<unfinished ...>
[pid 1989] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1989] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1989] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1988] <... futex resumed>) = 0
[pid 1988] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1988] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1989] <... futex resumed>) = 1
[pid 1989] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1989] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1988] <... futex resumed>) = 0
[pid 1988] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1988] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1989] <... futex resumed>) = 1
[pid 1989] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1989] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1988] <... futex resumed>) = 0
[pid 1988] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1988] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1988] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1988] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1988] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1990], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1990
[pid 1989] <... futex resumed>) = 1
./strace-static-x86_64: Process 1990 attached
[pid 1990] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 1989] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1988] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1990] <... set_robust_list resumed>) = 0
[pid 1988] <... futex resumed>) = 0
[pid 1988] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1989] <... umount2 resumed>) = 0
[pid 1990] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1989] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1989] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1990] <... umount2 resumed>) = 0
[pid 1990] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1988] <... futex resumed>) = 0
[pid 1988] exit_group(0) = ?
[pid 1989] <... futex resumed>) = ?
[pid 1989] +++ exited with 0 +++
[pid 1990] <... futex resumed>) = ?
[pid 1990] +++ exited with 0 +++
[pid 1988] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1988, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1991
./strace-static-x86_64: Process 1991 attached
[pid 1991] set_robust_list(0x5555560865e0, 24) = 0
[pid 1991] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1991] setpgid(0, 0) = 0
[pid 1991] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1991] write(3, "1000", 4) = 4
[pid 1991] close(3) = 0
[pid 1991] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1991] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1991] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1991] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1992], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1992
[pid 1991] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1991] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1992 attached
<unfinished ...>
[pid 1992] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1992] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1992] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1991] <... futex resumed>) = 0
[pid 1991] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1992] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 1991] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1992] <... mount resumed>) = 0
[pid 1992] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1991] <... futex resumed>) = 0
[pid 1991] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1991] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1992] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1992] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1991] <... futex resumed>) = 0
[pid 1992] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1991] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1991] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1991] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 1992] <... umount2 resumed>) = 0
[pid 1991] <... mmap resumed>) = 0x7f236e446000
[pid 1991] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1992] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1991] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1992] <... futex resumed>) = 0
./strace-static-x86_64: Process 1993 attached
[pid 1992] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1991] <... clone resumed>, parent_tid=[1993], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1993
[pid 1991] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1991] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1993] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1993] umount2("./file0", MNT_DETACH) = 0
[pid 1993] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1991] <... futex resumed>) = 0
[pid 1993] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1991] exit_group(0) = ?
[pid 1992] <... futex resumed>) = ?
[pid 1993] <... futex resumed>) = ?
[pid 1992] +++ exited with 0 +++
[pid 1993] +++ exited with 0 +++
[pid 1991] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1991, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1994
./strace-static-x86_64: Process 1994 attached
[pid 1994] set_robust_list(0x5555560865e0, 24) = 0
[pid 1994] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1994] setpgid(0, 0) = 0
[pid 1994] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1994] write(3, "1000", 4) = 4
[pid 1994] close(3) = 0
[pid 1994] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1994] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1994] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1994] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1995 attached
, parent_tid=[1995], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1995
[pid 1994] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1994] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1995] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1995] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1995] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1994] <... futex resumed>) = 0
[pid 1994] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1994] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1995] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1995] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1994] <... futex resumed>) = 0
[pid 1994] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1994] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1995] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1995] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1994] <... futex resumed>) = 0
[pid 1994] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1994] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1994] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1994] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1995] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1994] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[1996], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1996
[pid 1994] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1994] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1996 attached
<unfinished ...>
[pid 1996] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1996] umount2("./file0", MNT_DETACH) = 0
[pid 1995] <... umount2 resumed>) = 0
[pid 1996] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1994] <... futex resumed>) = 0
[pid 1996] <... futex resumed>) = 1
[pid 1995] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1996] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1995] <... futex resumed>) = 0
[pid 1995] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1994] exit_group(0) = ?
[pid 1996] <... futex resumed>) = ?
[pid 1996] +++ exited with 0 +++
[pid 1995] <... futex resumed>) = ?
[pid 1995] +++ exited with 0 +++
[pid 1994] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1994, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 1997
./strace-static-x86_64: Process 1997 attached
[pid 1997] set_robust_list(0x5555560865e0, 24) = 0
[pid 1997] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 1997] setpgid(0, 0) = 0
[pid 1997] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 1997] write(3, "1000", 4) = 4
[pid 1997] close(3) = 0
[pid 1997] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1997] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 1997] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1997] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 1998 attached
, parent_tid=[1998], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 1998
[pid 1997] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1997] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1998] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 1998] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 1998] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1997] <... futex resumed>) = 0
[pid 1997] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1997] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1998] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 1998] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1997] <... futex resumed>) = 0
[pid 1997] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1997] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 1998] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 1998] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 1997] <... futex resumed>) = 0
[pid 1997] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1997] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1997] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 1997] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 1997] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 1998] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 1997] <... clone resumed>, parent_tid=[1999], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 1999
[pid 1997] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1997] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 1999 attached
<unfinished ...>
[pid 1999] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 1999] umount2("./file0", MNT_DETACH) = 0
[pid 1999] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 1997] <... futex resumed>) = 0
[pid 1999] <... futex resumed>) = 1
[pid 1999] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1998] <... umount2 resumed>) = 0
[pid 1998] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 1998] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 1997] exit_group(0) = ?
[pid 1999] <... futex resumed>) = ?
[pid 1999] +++ exited with 0 +++
[pid 1998] <... futex resumed>) = ?
[pid 1998] +++ exited with 0 +++
[pid 1997] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=1997, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2000
./strace-static-x86_64: Process 2000 attached
[pid 2000] set_robust_list(0x5555560865e0, 24) = 0
[pid 2000] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2000] setpgid(0, 0) = 0
[pid 2000] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2000] write(3, "1000", 4) = 4
[pid 2000] close(3) = 0
[pid 2000] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2000] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2000] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2000] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2001 attached
, parent_tid=[2001], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2001
[pid 2000] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2000] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2001] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2001] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2001] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2000] <... futex resumed>) = 0
[pid 2001] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2000] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2000] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2001] <... mount resumed>) = 0
[pid 2001] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2000] <... futex resumed>) = 0
[pid 2001] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2000] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2000] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2001] <... mount resumed>) = 0
[pid 2001] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2000] <... futex resumed>) = 0
[pid 2001] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2000] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2001] <... futex resumed>) = 0
[pid 2000] <... futex resumed>) = 1
[pid 2001] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2000] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2000] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2000] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2000] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2001] <... umount2 resumed>) = 0
[pid 2001] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2000] <... clone resumed>, parent_tid=[2002], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2002
[pid 2001] <... futex resumed>) = 0
[pid 2000] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2001] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2000] <... futex resumed>) = 0
[pid 2000] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2002 attached
<unfinished ...>
[pid 2002] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2002] umount2("./file0", MNT_DETACH) = 0
[pid 2002] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2002] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2000] <... futex resumed>) = 0
[pid 2000] exit_group(0) = ?
[pid 2001] <... futex resumed>) = 231
[pid 2002] <... futex resumed>) = ?
[pid 2001] +++ exited with 0 +++
[pid 2002] +++ exited with 0 +++
[pid 2000] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2000, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2003
./strace-static-x86_64: Process 2003 attached
[pid 2003] set_robust_list(0x5555560865e0, 24) = 0
[pid 2003] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2003] setpgid(0, 0) = 0
[pid 2003] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2003] write(3, "1000", 4) = 4
[pid 2003] close(3) = 0
[pid 2003] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2003] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2003] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2003] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2004 attached
, parent_tid=[2004], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2004
[pid 2003] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2003] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2004] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2004] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2004] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2003] <... futex resumed>) = 0
[pid 2004] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2003] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2003] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2004] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2004] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2004] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2003] <... futex resumed>) = 0
[pid 2004] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2003] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2003] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2004] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2004] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2004] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2003] <... futex resumed>) = 0
[pid 2003] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2003] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2003] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2003] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2003] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2004] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2003] <... clone resumed>, parent_tid=[2005], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2005
[pid 2003] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2003] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2005 attached
<unfinished ...>
[pid 2005] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2004] <... umount2 resumed>) = 0
[pid 2005] <... set_robust_list resumed>) = 0
[pid 2004] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2005] umount2("./file0", MNT_DETACH) = 0
[pid 2004] <... futex resumed>) = 0
[pid 2005] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2003] <... futex resumed>) = 0
[pid 2003] exit_group(0) = ?
[pid 2005] <... futex resumed>) = ?
[pid 2005] +++ exited with 0 +++
[pid 2004] +++ exited with 0 +++
[pid 2003] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2003, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2006
./strace-static-x86_64: Process 2006 attached
[pid 2006] set_robust_list(0x5555560865e0, 24) = 0
[pid 2006] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2006] setpgid(0, 0) = 0
[pid 2006] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2006] write(3, "1000", 4) = 4
[pid 2006] close(3) = 0
[pid 2006] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2006] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2006] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2006] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2007], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2007
[pid 2006] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2006] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2007 attached
<unfinished ...>
[pid 2007] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2007] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2007] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2006] <... futex resumed>) = 0
[pid 2006] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2006] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2007] <... futex resumed>) = 1
[pid 2007] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2007] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2006] <... futex resumed>) = 0
[pid 2006] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2006] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2007] <... futex resumed>) = 1
[pid 2007] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2007] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2006] <... futex resumed>) = 0
[pid 2006] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2006] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2006] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2006] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2006] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2008], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2008
[pid 2006] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2006] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2007] <... futex resumed>) = 1
[pid 2007] umount2("./file0", MNT_DETACH) = 0
[pid 2007] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2007] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2008 attached
<unfinished ...>
[pid 2008] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2008] umount2("./file0", MNT_DETACH) = 0
[pid 2008] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2006] <... futex resumed>) = 0
[pid 2008] <... futex resumed>) = 1
[pid 2008] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2006] exit_group(0) = ?
[pid 2007] <... futex resumed>) = ?
[pid 2007] +++ exited with 0 +++
[pid 2008] <... futex resumed>) = ?
[pid 2008] +++ exited with 0 +++
[pid 2006] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2006, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2009
./strace-static-x86_64: Process 2009 attached
[pid 2009] set_robust_list(0x5555560865e0, 24) = 0
[pid 2009] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2009] setpgid(0, 0) = 0
[pid 2009] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2009] write(3, "1000", 4) = 4
[pid 2009] close(3) = 0
[pid 2009] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2009] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2009] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2009] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2010 attached
, parent_tid=[2010], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2010
[pid 2010] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2010] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2009] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2010] <... futex resumed>) = 0
[pid 2010] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2010] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2010] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2009] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2009] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2010] <... futex resumed>) = 0
[pid 2010] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2009] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2010] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2010] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2009] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2009] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2010] <... futex resumed>) = 0
[pid 2010] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2009] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2010] <... mount resumed>) = 0
[pid 2010] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2010] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2009] <... futex resumed>) = 0
[pid 2009] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2010] <... futex resumed>) = 0
[pid 2010] umount2("./file0", MNT_DETACH) = 0
[pid 2010] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2010] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2009] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2010] <... futex resumed>) = 0
[pid 2010] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2009] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2010] <... umount2 resumed>) = 0
[pid 2010] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2010] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2009] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2009] exit_group(0) = ?
[pid 2010] <... futex resumed>) = ?
[pid 2010] +++ exited with 0 +++
[pid 2009] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2009, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2011
./strace-static-x86_64: Process 2011 attached
[pid 2011] set_robust_list(0x5555560865e0, 24) = 0
[pid 2011] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2011] setpgid(0, 0) = 0
[pid 2011] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2011] write(3, "1000", 4) = 4
[pid 2011] close(3) = 0
[pid 2011] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2011] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2011] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2011] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2012 attached
<unfinished ...>
[pid 2012] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2011] <... clone resumed>, parent_tid=[2012], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2012
[pid 2012] <... set_robust_list resumed>) = 0
[pid 2011] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2011] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2012] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2012] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2011] <... futex resumed>) = 0
[pid 2012] <... futex resumed>) = 1
[pid 2011] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2012] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2011] <... futex resumed>) = 0
[pid 2011] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2012] <... mount resumed>) = 0
[pid 2012] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2011] <... futex resumed>) = 0
[pid 2011] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2011] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2012] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2012] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2011] <... futex resumed>) = 0
[pid 2011] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2011] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2012] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2011] <... futex resumed>) = 0
[pid 2011] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2011] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2011] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2013 attached
<unfinished ...>
[pid 2012] <... umount2 resumed>) = 0
[pid 2013] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2011] <... clone resumed>, parent_tid=[2013], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2013
[pid 2012] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2011] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2011] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2013] <... set_robust_list resumed>) = 0
[pid 2012] <... futex resumed>) = 0
[pid 2013] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2012] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2013] <... umount2 resumed>) = 0
[pid 2013] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2011] <... futex resumed>) = 0
[pid 2013] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2011] exit_group(0) = ?
[pid 2012] <... futex resumed>) = -1 (errno 18446744073709551555)
[pid 2013] <... futex resumed>) = ?
[pid 2012] +++ exited with 0 +++
[pid 2013] +++ exited with 0 +++
[pid 2011] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2011, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2014 attached
, child_tidptr=0x5555560865d0) = 2014
[pid 2014] set_robust_list(0x5555560865e0, 24) = 0
[pid 2014] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2014] setpgid(0, 0) = 0
[pid 2014] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2014] write(3, "1000", 4) = 4
[pid 2014] close(3) = 0
[pid 2014] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2014] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2014] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2014] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2015 attached
, parent_tid=[2015], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2015
[pid 2015] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2015] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2014] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2014] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2015] <... futex resumed>) = 0
[pid 2015] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2015] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2015] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2014] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2014] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2015] <... futex resumed>) = 0
[pid 2014] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2015] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2015] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2014] <... futex resumed>) = 0
[pid 2014] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2014] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2015] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2015] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2014] <... futex resumed>) = 0
[pid 2014] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2014] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2014] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2014] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2014] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2016], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2016
[pid 2014] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2014] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2016 attached
<unfinished ...>
[pid 2016] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2016] umount2("./file0", MNT_DETACH) = 0
[pid 2016] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2014] <... futex resumed>) = 0
[pid 2016] <... futex resumed>) = 1
[pid 2016] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2015] umount2("./file0", MNT_DETACH) = 0
[pid 2015] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2015] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2014] exit_group(0) = ?
[pid 2016] <... futex resumed>) = ?
[pid 2016] +++ exited with 0 +++
[pid 2015] <... futex resumed>) = ?
[pid 2015] +++ exited with 0 +++
[pid 2014] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2014, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2017
./strace-static-x86_64: Process 2017 attached
[pid 2017] set_robust_list(0x5555560865e0, 24) = 0
[pid 2017] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2017] setpgid(0, 0) = 0
[pid 2017] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2017] write(3, "1000", 4) = 4
[pid 2017] close(3) = 0
[pid 2017] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2017] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2017] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2017] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2018 attached
, parent_tid=[2018], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2018
[pid 2018] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2017] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2018] <... set_robust_list resumed>) = 0
[pid 2017] <... futex resumed>) = 0
[pid 2017] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2018] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2018] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2017] <... futex resumed>) = 0
[pid 2018] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2017] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2018] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2017] <... futex resumed>) = 0
[pid 2018] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2017] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2018] <... mount resumed>) = 0
[pid 2018] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2017] <... futex resumed>) = 0
[pid 2018] <... futex resumed>) = 1
[pid 2017] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2018] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2017] <... futex resumed>) = 0
[pid 2017] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2018] <... mount resumed>) = 0
[pid 2018] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2017] <... futex resumed>) = 0
[pid 2018] <... futex resumed>) = 1
[pid 2017] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2018] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2017] <... futex resumed>) = 0
[pid 2017] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2017] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2017] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2018] <... umount2 resumed>) = 0
[pid 2017] <... mprotect resumed>) = 0
[pid 2018] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2017] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2018] <... futex resumed>) = 0
[pid 2018] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2017] <... clone resumed>, parent_tid=[2019], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2019
./strace-static-x86_64: Process 2019 attached
[pid 2017] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2019] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2017] <... futex resumed>) = 0
[pid 2019] <... set_robust_list resumed>) = 0
[pid 2017] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2019] umount2("./file0", MNT_DETACH) = 0
[pid 2019] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2017] <... futex resumed>) = 0
[pid 2019] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2017] exit_group(0) = ?
[pid 2019] <... futex resumed>) = ?
[pid 2018] <... futex resumed>) = ?
[pid 2018] +++ exited with 0 +++
[pid 2019] +++ exited with 0 +++
[pid 2017] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2017, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2020
./strace-static-x86_64: Process 2020 attached
[pid 2020] set_robust_list(0x5555560865e0, 24) = 0
[pid 2020] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2020] setpgid(0, 0) = 0
[pid 2020] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2020] write(3, "1000", 4) = 4
[pid 2020] close(3) = 0
[pid 2020] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2020] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2020] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2020] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2021 attached
, parent_tid=[2021], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2021
[pid 2021] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2020] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2021] <... set_robust_list resumed>) = 0
[pid 2021] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2021] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2021] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2020] <... futex resumed>) = 1
[pid 2021] <... futex resumed>) = 0
[pid 2020] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2021] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2020] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2020] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2021] <... futex resumed>) = 0
[pid 2021] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2020] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2021] <... mount resumed>) = 0
[pid 2021] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2021] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2020] <... futex resumed>) = 0
[pid 2020] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2021] <... futex resumed>) = 0
[pid 2020] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2021] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2021] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2021] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2020] <... futex resumed>) = 0
[pid 2021] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2020] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2021] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2020] <... futex resumed>) = 0
[pid 2020] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2020] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2020] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2021] <... umount2 resumed>) = 0
[pid 2021] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2020] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2021] <... futex resumed>) = 0
[pid 2021] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2022 attached
<unfinished ...>
[pid 2020] <... clone resumed>, parent_tid=[2022], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2022
[pid 2022] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2020] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2022] <... set_robust_list resumed>) = 0
[pid 2020] <... futex resumed>) = 0
[pid 2022] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2020] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2022] <... umount2 resumed>) = 0
[pid 2022] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2022] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2020] <... futex resumed>) = 0
[pid 2020] exit_group(0) = ?
[pid 2021] <... futex resumed>) = ?
[pid 2021] +++ exited with 0 +++
[pid 2022] <... futex resumed>) = ?
[pid 2022] +++ exited with 0 +++
[pid 2020] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2020, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2023
./strace-static-x86_64: Process 2023 attached
[pid 2023] set_robust_list(0x5555560865e0, 24) = 0
[pid 2023] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2023] setpgid(0, 0) = 0
[pid 2023] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2023] write(3, "1000", 4) = 4
[pid 2023] close(3) = 0
[pid 2023] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2023] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2023] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2023] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2024], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2024
[pid 2023] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2023] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2024 attached
<unfinished ...>
[pid 2024] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2024] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2024] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2023] <... futex resumed>) = 0
[pid 2023] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2023] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2024] <... futex resumed>) = 1
[pid 2024] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2024] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2023] <... futex resumed>) = 0
[pid 2023] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2023] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2024] <... futex resumed>) = 1
[pid 2024] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2024] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2023] <... futex resumed>) = 0
[pid 2024] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2023] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2024] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2023] <... futex resumed>) = 0
[pid 2024] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2023] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2023] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2023] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2023] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2024] <... umount2 resumed>) = 0
[pid 2023] <... clone resumed>, parent_tid=[2025], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2025
./strace-static-x86_64: Process 2025 attached
[pid 2024] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2023] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2025] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2024] <... futex resumed>) = 0
[pid 2023] <... futex resumed>) = 0
[pid 2025] <... set_robust_list resumed>) = 0
[pid 2024] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2023] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2025] umount2("./file0", MNT_DETACH) = 0
[pid 2025] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2023] <... futex resumed>) = 0
[pid 2025] <... futex resumed>) = 1
[pid 2023] exit_group(0) = ?
[pid 2024] <... futex resumed>) = ?
[pid 2024] +++ exited with 0 +++
[pid 2025] +++ exited with 0 +++
[pid 2023] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2023, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2026
./strace-static-x86_64: Process 2026 attached
[pid 2026] set_robust_list(0x5555560865e0, 24) = 0
[pid 2026] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2026] setpgid(0, 0) = 0
[pid 2026] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2026] write(3, "1000", 4) = 4
[pid 2026] close(3) = 0
[pid 2026] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2026] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2026] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2026] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2027 attached
, parent_tid=[2027], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2027
[pid 2027] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2027] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2026] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2027] <... futex resumed>) = 0
[pid 2027] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2027] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2027] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2026] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2026] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2027] <... futex resumed>) = 0
[pid 2027] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2026] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2027] <... mount resumed>) = 0
[pid 2027] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2027] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2026] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2026] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2027] <... futex resumed>) = 0
[pid 2027] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2026] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2027] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2027] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2026] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2026] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2027] <... futex resumed>) = 0
[pid 2026] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2027] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2026] <... futex resumed>) = 0
[pid 2026] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2026] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2026] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2027] <... umount2 resumed>) = 0
[pid 2027] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2027] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2028 attached
<unfinished ...>
[pid 2028] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2028] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2026] <... clone resumed>, parent_tid=[2028], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2028
[pid 2026] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2028] <... futex resumed>) = 0
[pid 2026] <... futex resumed>) = 1
[pid 2026] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2028] umount2("./file0", MNT_DETACH) = 0
[pid 2028] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2026] <... futex resumed>) = 0
[pid 2028] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2026] exit_group(0) = ?
[pid 2027] <... futex resumed>) = ?
[pid 2027] +++ exited with 0 +++
[pid 2028] <... futex resumed>) = ?
[pid 2028] +++ exited with 0 +++
[pid 2026] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2026, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2029
./strace-static-x86_64: Process 2029 attached
[pid 2029] set_robust_list(0x5555560865e0, 24) = 0
[pid 2029] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2029] setpgid(0, 0) = 0
[pid 2029] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2029] write(3, "1000", 4) = 4
[pid 2029] close(3) = 0
[pid 2029] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2029] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2029] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2029] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2030 attached
, parent_tid=[2030], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2030
[pid 2030] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2029] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2030] <... set_robust_list resumed>) = 0
[pid 2029] <... futex resumed>) = 0
[pid 2029] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2030] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2030] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2029] <... futex resumed>) = 0
[pid 2030] <... futex resumed>) = 1
[pid 2029] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2030] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2029] <... futex resumed>) = 0
[pid 2029] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2030] <... mount resumed>) = 0
[pid 2030] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2029] <... futex resumed>) = 0
[pid 2030] <... futex resumed>) = 1
[pid 2029] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2030] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2029] <... futex resumed>) = 0
[pid 2029] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2030] <... mount resumed>) = 0
[pid 2030] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2029] <... futex resumed>) = 0
[pid 2030] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2029] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2029] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2029] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2029] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2029] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2031 attached
<unfinished ...>
[pid 2030] <... umount2 resumed>) = 0
[pid 2029] <... clone resumed>, parent_tid=[2031], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2031
[pid 2031] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2030] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2029] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2031] <... set_robust_list resumed>) = 0
[pid 2030] <... futex resumed>) = 0
[pid 2029] <... futex resumed>) = 0
[pid 2029] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2030] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2031] umount2("./file0", MNT_DETACH) = 0
[pid 2031] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2029] <... futex resumed>) = 0
[pid 2031] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2029] exit_group(0) = ?
[pid 2030] <... futex resumed>) = ?
[pid 2030] +++ exited with 0 +++
[pid 2031] <... futex resumed>) = ?
[pid 2031] +++ exited with 0 +++
[pid 2029] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2029, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2032
./strace-static-x86_64: Process 2032 attached
[pid 2032] set_robust_list(0x5555560865e0, 24) = 0
[pid 2032] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2032] setpgid(0, 0) = 0
[pid 2032] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2032] write(3, "1000", 4) = 4
[pid 2032] close(3) = 0
[pid 2032] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2032] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2032] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2032] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2033 attached
, parent_tid=[2033], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2033
[pid 2033] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2032] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2033] <... set_robust_list resumed>) = 0
[pid 2032] <... futex resumed>) = 0
[pid 2032] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2033] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2033] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2032] <... futex resumed>) = 0
[pid 2033] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2032] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2033] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2032] <... futex resumed>) = 0
[pid 2033] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2032] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2033] <... mount resumed>) = 0
[pid 2033] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2032] <... futex resumed>) = 0
[pid 2033] <... futex resumed>) = 1
[pid 2032] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2033] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2032] <... futex resumed>) = 0
[pid 2032] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2033] <... mount resumed>) = 0
[pid 2033] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2032] <... futex resumed>) = 0
[pid 2033] <... futex resumed>) = 1
[pid 2032] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2033] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2032] <... futex resumed>) = 0
[pid 2032] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2032] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2032] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2032] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2034], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2034
./strace-static-x86_64: Process 2034 attached
[pid 2033] <... umount2 resumed>) = 0
[pid 2032] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2034] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2033] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2032] <... futex resumed>) = 0
[pid 2034] <... set_robust_list resumed>) = 0
[pid 2033] <... futex resumed>) = 0
[pid 2032] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2034] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2033] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2034] <... umount2 resumed>) = 0
[pid 2034] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2032] <... futex resumed>) = 0
[pid 2034] <... futex resumed>) = 1
[pid 2032] exit_group(0 <unfinished ...>
[pid 2034] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2032] <... exit_group resumed>) = ?
[pid 2033] <... futex resumed>) = ?
[pid 2033] +++ exited with 0 +++
[pid 2034] <... futex resumed>) = ?
[pid 2034] +++ exited with 0 +++
[pid 2032] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2032, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2035
./strace-static-x86_64: Process 2035 attached
[pid 2035] set_robust_list(0x5555560865e0, 24) = 0
[pid 2035] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2035] setpgid(0, 0) = 0
[pid 2035] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2035] write(3, "1000", 4) = 4
[pid 2035] close(3) = 0
[pid 2035] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2035] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2035] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2035] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2036 attached
, parent_tid=[2036], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2036
[pid 2035] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2035] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2036] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2036] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2036] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2035] <... futex resumed>) = 0
[pid 2035] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2035] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2036] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2036] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2035] <... futex resumed>) = 0
[pid 2035] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2035] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2036] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2036] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2035] <... futex resumed>) = 0
[pid 2035] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2035] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2035] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2035] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2035] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2037], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2037
[pid 2035] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2035] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2037 attached
<unfinished ...>
[pid 2037] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2037] umount2("./file0", MNT_DETACH) = 0
[pid 2037] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2035] <... futex resumed>) = 0
[pid 2037] <... futex resumed>) = 1
[pid 2036] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2037] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2036] <... umount2 resumed>) = 0
[pid 2036] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2036] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2035] exit_group(0) = ?
[pid 2037] <... futex resumed>) = ?
[pid 2037] +++ exited with 0 +++
[pid 2036] <... futex resumed>) = ?
[pid 2036] +++ exited with 0 +++
[pid 2035] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2035, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2038
./strace-static-x86_64: Process 2038 attached
[pid 2038] set_robust_list(0x5555560865e0, 24) = 0
[pid 2038] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2038] setpgid(0, 0) = 0
[pid 2038] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2038] write(3, "1000", 4) = 4
[pid 2038] close(3) = 0
[pid 2038] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2038] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2038] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2038] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2039 attached
, parent_tid=[2039], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2039
[pid 2039] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2039] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2038] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2039] <... futex resumed>) = 0
[pid 2038] <... futex resumed>) = 1
[pid 2039] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2038] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2039] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2039] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2038] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2038] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2039] <... futex resumed>) = 0
[pid 2039] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2038] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2039] <... mount resumed>) = 0
[pid 2039] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2038] <... futex resumed>) = 0
[pid 2039] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2038] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2039] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2038] <... futex resumed>) = 0
[pid 2039] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2038] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2039] <... mount resumed>) = 0
[pid 2039] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2039] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2038] <... futex resumed>) = 0
[pid 2038] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2039] <... futex resumed>) = 0
[pid 2039] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2038] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2038] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2039] <... umount2 resumed>) = 0
[pid 2039] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2039] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2038] <... mmap resumed>) = 0x7f236e446000
[pid 2038] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2038] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2040 attached
, parent_tid=[2040], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2040
[pid 2040] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2040] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2038] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2038] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2040] <... futex resumed>) = 0
[pid 2040] umount2("./file0", MNT_DETACH) = 0
[pid 2040] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2038] <... futex resumed>) = 0
[pid 2040] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2038] exit_group(0 <unfinished ...>
[pid 2039] <... futex resumed>) = ?
[pid 2038] <... exit_group resumed>) = ?
[pid 2039] +++ exited with 0 +++
[pid 2040] <... futex resumed>) = ?
[pid 2040] +++ exited with 0 +++
[pid 2038] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2038, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2041
./strace-static-x86_64: Process 2041 attached
[pid 2041] set_robust_list(0x5555560865e0, 24) = 0
[pid 2041] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2041] setpgid(0, 0) = 0
[pid 2041] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2041] write(3, "1000", 4) = 4
[pid 2041] close(3) = 0
[pid 2041] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2041] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2041] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2041] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2042 attached
, parent_tid=[2042], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2042
[pid 2042] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2041] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2041] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2042] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2042] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2042] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2041] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2041] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2042] <... futex resumed>) = 0
[pid 2041] <... futex resumed>) = 1
[pid 2042] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2041] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2042] <... mount resumed>) = 0
[pid 2042] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2041] <... futex resumed>) = 0
[pid 2041] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2041] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2042] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2042] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2041] <... futex resumed>) = 0
[pid 2042] <... futex resumed>) = 1
[pid 2041] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2042] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2041] <... futex resumed>) = 0
[pid 2041] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2042] <... umount2 resumed>) = 0
[pid 2041] <... futex resumed>) = 0
[pid 2041] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2042] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2041] <... mmap resumed>) = 0x7f236e446000
[pid 2042] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2041] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2041] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2043], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2043
[pid 2041] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2041] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2043 attached
<unfinished ...>
[pid 2043] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2043] umount2("./file0", MNT_DETACH) = 0
[pid 2043] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2041] <... futex resumed>) = 0
[pid 2043] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2041] exit_group(0) = ?
[pid 2042] <... futex resumed>) = ?
[pid 2043] <... futex resumed>) = ?
[pid 2043] +++ exited with 0 +++
[pid 2042] +++ exited with 0 +++
[pid 2041] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2041, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2044
./strace-static-x86_64: Process 2044 attached
[pid 2044] set_robust_list(0x5555560865e0, 24) = 0
[pid 2044] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2044] setpgid(0, 0) = 0
[pid 2044] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2044] write(3, "1000", 4) = 4
[pid 2044] close(3) = 0
[pid 2044] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2044] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2044] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2044] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2045 attached
, parent_tid=[2045], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2045
[pid 2045] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2044] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2045] <... set_robust_list resumed>) = 0
[pid 2044] <... futex resumed>) = 0
[pid 2045] mkdir("./file0", 000 <unfinished ...>
[pid 2044] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2045] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2045] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2044] <... futex resumed>) = 0
[pid 2044] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2044] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2045] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2045] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2044] <... futex resumed>) = 0
[pid 2044] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2044] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2045] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2045] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2044] <... futex resumed>) = 0
[pid 2044] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2044] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2044] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2044] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2044] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2045] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2044] <... clone resumed>, parent_tid=[2046], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2046
[pid 2044] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2044] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2046 attached
<unfinished ...>
[pid 2046] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2046] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2045] <... umount2 resumed>) = 0
[pid 2045] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2046] <... umount2 resumed>) = 0
[pid 2046] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2044] <... futex resumed>) = 0
[pid 2044] exit_group(0) = ?
[pid 2046] <... futex resumed>) = ?
[pid 2046] +++ exited with 0 +++
[pid 2045] <... futex resumed>) = ?
[pid 2045] +++ exited with 0 +++
[pid 2044] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2044, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2047
./strace-static-x86_64: Process 2047 attached
[pid 2047] set_robust_list(0x5555560865e0, 24) = 0
[pid 2047] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2047] setpgid(0, 0) = 0
[pid 2047] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2047] write(3, "1000", 4) = 4
[pid 2047] close(3) = 0
[pid 2047] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2047] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2047] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2047] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2048 attached
<unfinished ...>
[pid 2048] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2048] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2047] <... clone resumed>, parent_tid=[2048], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2048
[pid 2047] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2048] <... futex resumed>) = 0
[pid 2048] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2048] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2048] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2047] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2047] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2048] <... futex resumed>) = 0
[pid 2047] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2048] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2048] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2048] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2047] <... futex resumed>) = 0
[pid 2047] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2048] <... futex resumed>) = 0
[pid 2047] <... futex resumed>) = 1
[pid 2048] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2047] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2048] <... mount resumed>) = 0
[pid 2048] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2047] <... futex resumed>) = 0
[pid 2048] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2047] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2047] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2047] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2047] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2047] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2048] <... umount2 resumed>) = 0
[pid 2048] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2047] <... clone resumed>, parent_tid=[2049], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2049
[pid 2048] <... futex resumed>) = 0
[pid 2047] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2048] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2047] <... futex resumed>) = 0
[pid 2047] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2049 attached
<unfinished ...>
[pid 2049] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2049] umount2("./file0", MNT_DETACH) = 0
[pid 2049] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2047] <... futex resumed>) = 0
[pid 2049] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2047] exit_group(0) = ?
[pid 2048] <... futex resumed>) = ?
[pid 2048] +++ exited with 0 +++
[pid 2049] <... futex resumed>) = ?
[pid 2049] +++ exited with 0 +++
[pid 2047] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2047, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2050 attached
, child_tidptr=0x5555560865d0) = 2050
[pid 2050] set_robust_list(0x5555560865e0, 24) = 0
[pid 2050] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2050] setpgid(0, 0) = 0
[pid 2050] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2050] write(3, "1000", 4) = 4
[pid 2050] close(3) = 0
[pid 2050] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2050] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2050] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2050] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2051], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2051
[pid 2050] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2050] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2051 attached
<unfinished ...>
[pid 2051] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2051] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2051] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2050] <... futex resumed>) = 0
[pid 2050] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2050] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2051] <... futex resumed>) = 1
[pid 2051] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2051] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2050] <... futex resumed>) = 0
[pid 2050] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2050] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2051] <... futex resumed>) = 1
[pid 2051] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2051] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2050] <... futex resumed>) = 0
[pid 2050] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2050] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2050] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2050] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2050] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2051] <... futex resumed>) = 1
./strace-static-x86_64: Process 2052 attached
[pid 2050] <... clone resumed>, parent_tid=[2052], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2052
[pid 2052] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2051] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2052] <... set_robust_list resumed>) = 0
[pid 2050] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2050] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2051] <... umount2 resumed>) = 0
[pid 2052] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2051] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2051] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2052] <... umount2 resumed>) = 0
[pid 2052] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2050] <... futex resumed>) = 0
[pid 2052] <... futex resumed>) = 1
[pid 2050] exit_group(0 <unfinished ...>
[pid 2052] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2050] <... exit_group resumed>) = ?
[pid 2051] <... futex resumed>) = -1 (errno 18446744073709551414)
[pid 2052] <... futex resumed>) = ?
[pid 2051] +++ exited with 0 +++
[pid 2052] +++ exited with 0 +++
[pid 2050] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2050, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2053
./strace-static-x86_64: Process 2053 attached
[pid 2053] set_robust_list(0x5555560865e0, 24) = 0
[pid 2053] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2053] setpgid(0, 0) = 0
[pid 2053] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2053] write(3, "1000", 4) = 4
[pid 2053] close(3) = 0
[pid 2053] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2053] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2053] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2053] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2054 attached
, parent_tid=[2054], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2054
[pid 2054] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2054] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2053] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2054] <... futex resumed>) = 0
[pid 2053] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2054] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2054] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2054] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2053] <... futex resumed>) = 0
[pid 2053] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2054] <... futex resumed>) = 0
[pid 2054] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2053] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2054] <... mount resumed>) = 0
[pid 2054] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2053] <... futex resumed>) = 0
[pid 2053] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2054] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2053] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2054] <... mount resumed>) = 0
[pid 2054] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2053] <... futex resumed>) = 0
[pid 2053] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2053] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2053] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2054] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2053] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2053] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2054] <... umount2 resumed>) = 0
[pid 2053] <... clone resumed>, parent_tid=[2055], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2055
[pid 2054] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2053] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2053] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2054] <... futex resumed>) = 0
[pid 2054] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2055 attached
<unfinished ...>
[pid 2055] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2055] umount2("./file0", MNT_DETACH) = 0
[pid 2055] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2053] <... futex resumed>) = 0
[pid 2053] exit_group(0) = ?
[pid 2054] <... futex resumed>) = ?
[pid 2054] +++ exited with 0 +++
[pid 2055] +++ exited with 0 +++
[pid 2053] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2053, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2056
./strace-static-x86_64: Process 2056 attached
[pid 2056] set_robust_list(0x5555560865e0, 24) = 0
[pid 2056] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2056] setpgid(0, 0) = 0
[pid 2056] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2056] write(3, "1000", 4) = 4
[pid 2056] close(3) = 0
[pid 2056] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2056] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2056] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2056] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2057 attached
, parent_tid=[2057], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2057
[pid 2056] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2056] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2057] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2057] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2057] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2056] <... futex resumed>) = 0
[pid 2056] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2056] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2057] <... futex resumed>) = 1
[pid 2057] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2057] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2056] <... futex resumed>) = 0
[pid 2056] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2056] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2057] <... futex resumed>) = 1
[pid 2057] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2057] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2056] <... futex resumed>) = 0
[pid 2056] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2056] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2056] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2056] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2056] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2058 attached
, parent_tid=[2058], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2058
[pid 2056] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2056] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2057] <... futex resumed>) = 1
[pid 2057] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2058] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2058] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2057] <... umount2 resumed>) = 0
[pid 2057] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2057] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2058] <... umount2 resumed>) = 0
[pid 2058] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2056] <... futex resumed>) = 0
[pid 2056] exit_group(0) = ?
[pid 2057] <... futex resumed>) = ?
[pid 2058] +++ exited with 0 +++
[pid 2057] +++ exited with 0 +++
[pid 2056] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2056, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2059
./strace-static-x86_64: Process 2059 attached
[pid 2059] set_robust_list(0x5555560865e0, 24) = 0
[pid 2059] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2059] setpgid(0, 0) = 0
[pid 2059] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2059] write(3, "1000", 4) = 4
[pid 2059] close(3) = 0
[pid 2059] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2059] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2059] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2059] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2060 attached
, parent_tid=[2060], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2060
[pid 2060] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2060] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2059] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2060] <... futex resumed>) = 0
[pid 2059] <... futex resumed>) = 1
[pid 2060] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2060] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2060] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2059] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2059] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2060] <... futex resumed>) = 0
[pid 2060] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2059] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2060] <... mount resumed>) = 0
[pid 2060] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2060] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2059] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2059] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2060] <... futex resumed>) = 0
[pid 2060] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2059] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2060] <... mount resumed>) = 0
[pid 2060] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2060] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2059] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2059] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2060] <... futex resumed>) = 0
[pid 2060] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2059] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2060] <... umount2 resumed>) = 0
[pid 2060] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2060] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2059] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2059] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2059] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2061 attached
, parent_tid=[2061], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2061
[pid 2059] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2059] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2061] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2061] umount2("./file0", MNT_DETACH) = 0
[pid 2061] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2059] <... futex resumed>) = 0
[pid 2059] exit_group(0) = ?
[pid 2061] +++ exited with 0 +++
[pid 2060] <... futex resumed>) = ?
[pid 2060] +++ exited with 0 +++
[pid 2059] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2059, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2062
./strace-static-x86_64: Process 2062 attached
[pid 2062] set_robust_list(0x5555560865e0, 24) = 0
[pid 2062] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2062] setpgid(0, 0) = 0
[pid 2062] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2062] write(3, "1000", 4) = 4
[pid 2062] close(3) = 0
[pid 2062] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2062] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2062] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2062] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2063], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2063
[pid 2062] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2062] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2063 attached
<unfinished ...>
[pid 2063] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2063] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2063] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2062] <... futex resumed>) = 0
[pid 2062] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2062] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2063] <... futex resumed>) = 1
[pid 2063] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2063] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2062] <... futex resumed>) = 0
[pid 2062] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2062] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2063] <... futex resumed>) = 1
[pid 2063] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2063] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2062] <... futex resumed>) = 0
[pid 2062] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2062] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2062] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2062] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2062] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2064], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2064
[pid 2062] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2062] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2063] <... futex resumed>) = 1
[pid 2063] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 2064 attached
<unfinished ...>
[pid 2064] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2063] <... umount2 resumed>) = 0
[pid 2063] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2063] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2064] <... set_robust_list resumed>) = 0
[pid 2064] umount2("./file0", MNT_DETACH) = 0
[pid 2064] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2062] <... futex resumed>) = 0
[pid 2062] exit_group(0) = ?
[pid 2063] <... futex resumed>) = ?
[pid 2063] +++ exited with 0 +++
[pid 2064] <... futex resumed>) = ?
[pid 2064] +++ exited with 0 +++
[pid 2062] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2062, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2065
./strace-static-x86_64: Process 2065 attached
[pid 2065] set_robust_list(0x5555560865e0, 24) = 0
[pid 2065] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2065] setpgid(0, 0) = 0
[pid 2065] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2065] write(3, "1000", 4) = 4
[pid 2065] close(3) = 0
[pid 2065] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2065] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2065] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2065] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2066], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2066
[pid 2065] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2065] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2066 attached
<unfinished ...>
[pid 2066] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2066] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2066] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2065] <... futex resumed>) = 0
[pid 2065] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2065] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2066] <... futex resumed>) = 1
[pid 2066] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2066] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2065] <... futex resumed>) = 0
[pid 2065] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2065] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2066] <... futex resumed>) = 1
[pid 2066] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2066] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2065] <... futex resumed>) = 0
[pid 2065] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2065] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2065] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2065] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2066] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2065] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2066] <... umount2 resumed>) = 0
[pid 2066] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2067 attached
<unfinished ...>
[pid 2065] <... clone resumed>, parent_tid=[2067], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2067
[pid 2065] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2065] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2066] <... futex resumed>) = 0
[pid 2067] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2066] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2067] umount2("./file0", MNT_DETACH) = 0
[pid 2067] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2065] <... futex resumed>) = 0
[pid 2067] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2065] exit_group(0) = ?
[pid 2067] <... futex resumed>) = ?
[pid 2066] <... futex resumed>) = ?
[pid 2066] +++ exited with 0 +++
[pid 2067] +++ exited with 0 +++
[pid 2065] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2065, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2068
./strace-static-x86_64: Process 2068 attached
[pid 2068] set_robust_list(0x5555560865e0, 24) = 0
[pid 2068] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2068] setpgid(0, 0) = 0
[pid 2068] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2068] write(3, "1000", 4) = 4
[pid 2068] close(3) = 0
[pid 2068] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2068] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2068] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2068] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2069], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2069
./strace-static-x86_64: Process 2069 attached
[pid 2069] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2069] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2068] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2069] <... futex resumed>) = 0
[pid 2068] <... futex resumed>) = 1
[pid 2069] mkdir("./file0", 000 <unfinished ...>
[pid 2068] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2069] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2069] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2069] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2068] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2068] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2069] <... futex resumed>) = 0
[pid 2069] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2068] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2069] <... mount resumed>) = 0
[pid 2069] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2069] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2068] <... futex resumed>) = 0
[pid 2068] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2069] <... futex resumed>) = 0
[pid 2069] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2068] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2069] <... mount resumed>) = 0
[pid 2069] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2069] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2068] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2068] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2069] <... futex resumed>) = 0
[pid 2069] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2068] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2069] <... umount2 resumed>) = 0
[pid 2068] <... futex resumed>) = 0
[pid 2069] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2069] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2068] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2068] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2068] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2070 attached
, parent_tid=[2070], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2070
[pid 2070] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2070] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2068] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2070] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2068] <... futex resumed>) = 0
[pid 2068] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2070] umount2("./file0", MNT_DETACH) = 0
[pid 2070] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2068] <... futex resumed>) = 0
[pid 2070] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2068] exit_group(0 <unfinished ...>
[pid 2069] <... futex resumed>) = ?
[pid 2068] <... exit_group resumed>) = ?
[pid 2069] +++ exited with 0 +++
[pid 2070] <... futex resumed>) = ?
[pid 2070] +++ exited with 0 +++
[pid 2068] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2068, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2071
./strace-static-x86_64: Process 2071 attached
[pid 2071] set_robust_list(0x5555560865e0, 24) = 0
[pid 2071] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2071] setpgid(0, 0) = 0
[pid 2071] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2071] write(3, "1000", 4) = 4
[pid 2071] close(3) = 0
[pid 2071] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2071] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2071] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2071] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2072 attached
, parent_tid=[2072], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2072
[pid 2072] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2072] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2071] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2072] <... futex resumed>) = 0
[pid 2072] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2072] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2072] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2071] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2071] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2072] <... futex resumed>) = 0
[pid 2071] <... futex resumed>) = 1
[pid 2072] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2071] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2072] <... mount resumed>) = 0
[pid 2072] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2072] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2071] <... futex resumed>) = 0
[pid 2071] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2072] <... futex resumed>) = 0
[pid 2071] <... futex resumed>) = 1
[pid 2072] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2071] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2072] <... mount resumed>) = 0
[pid 2072] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2071] <... futex resumed>) = 0
[pid 2072] <... futex resumed>) = 1
[pid 2071] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2072] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2071] <... futex resumed>) = 0
[pid 2071] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2071] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2071] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2071] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2072] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2073 attached
[pid 2072] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2073] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2072] <... futex resumed>) = 0
[pid 2071] <... clone resumed>, parent_tid=[2073], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2073
[pid 2073] <... set_robust_list resumed>) = 0
[pid 2072] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2071] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2073] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2071] <... futex resumed>) = 0
[pid 2071] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2073] <... umount2 resumed>) = 0
[pid 2073] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2071] <... futex resumed>) = 0
[pid 2073] <... futex resumed>) = 1
[pid 2071] exit_group(0 <unfinished ...>
[pid 2073] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2071] <... exit_group resumed>) = ?
[pid 2072] <... futex resumed>) = ?
[pid 2072] +++ exited with 0 +++
[pid 2073] <... futex resumed>) = ?
[pid 2073] +++ exited with 0 +++
[pid 2071] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2071, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2074
./strace-static-x86_64: Process 2074 attached
[pid 2074] set_robust_list(0x5555560865e0, 24) = 0
[pid 2074] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2074] setpgid(0, 0) = 0
[pid 2074] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2074] write(3, "1000", 4) = 4
[pid 2074] close(3) = 0
[pid 2074] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2074] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2074] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2074] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2075 attached
, parent_tid=[2075], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2075
[pid 2075] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2075] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2074] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2074] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2075] <... futex resumed>) = 0
[pid 2075] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2075] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2075] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2074] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2074] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2075] <... futex resumed>) = 0
[pid 2075] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2074] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2075] <... mount resumed>) = 0
[pid 2075] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2074] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2075] <... futex resumed>) = 0
[pid 2075] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2074] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2075] <... futex resumed>) = 0
[pid 2074] <... futex resumed>) = 1
[pid 2075] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2074] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2075] <... mount resumed>) = 0
[pid 2075] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2074] <... futex resumed>) = 0
[pid 2074] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2074] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2075] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2074] <... futex resumed>) = 0
[pid 2074] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2074] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2074] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2076], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2076
[pid 2074] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2074] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2076 attached
<unfinished ...>
[pid 2076] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2076] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2075] <... umount2 resumed>) = 0
[pid 2076] <... umount2 resumed>) = 0
[pid 2076] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2074] <... futex resumed>) = 0
[pid 2076] <... futex resumed>) = 1
[pid 2076] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2075] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2075] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2074] exit_group(0 <unfinished ...>
[pid 2076] <... futex resumed>) = 231
[pid 2074] <... exit_group resumed>) = ?
[pid 2075] <... futex resumed>) = ?
[pid 2075] +++ exited with 0 +++
[pid 2076] +++ exited with 0 +++
[pid 2074] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2074, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2077
./strace-static-x86_64: Process 2077 attached
[pid 2077] set_robust_list(0x5555560865e0, 24) = 0
[pid 2077] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2077] setpgid(0, 0) = 0
[pid 2077] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2077] write(3, "1000", 4) = 4
[pid 2077] close(3) = 0
[pid 2077] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2077] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2077] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2077] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2078 attached
<unfinished ...>
[pid 2078] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2078] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2077] <... clone resumed>, parent_tid=[2078], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2078
[pid 2077] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2078] <... futex resumed>) = 0
[pid 2078] mkdir("./file0", 000 <unfinished ...>
[pid 2077] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2078] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2078] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2078] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2077] <... futex resumed>) = 0
[pid 2077] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2078] <... futex resumed>) = 0
[pid 2078] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2077] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2078] <... mount resumed>) = 0
[pid 2078] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2078] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2077] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2077] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2078] <... futex resumed>) = 0
[pid 2078] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2077] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2078] <... mount resumed>) = 0
[pid 2078] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2077] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2078] <... futex resumed>) = 0
[pid 2077] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2078] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2077] <... futex resumed>) = 0
[pid 2077] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2077] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2077] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2078] <... umount2 resumed>) = 0
[pid 2078] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2078] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2077] <... mprotect resumed>) = 0
[pid 2077] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2079 attached
<unfinished ...>
[pid 2079] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2079] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2077] <... clone resumed>, parent_tid=[2079], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2079
[pid 2077] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2077] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2079] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2079] umount2("./file0", MNT_DETACH) = 0
[pid 2079] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2077] <... futex resumed>) = 0
[pid 2077] exit_group(0) = ?
[pid 2078] <... futex resumed>) = ?
[pid 2078] +++ exited with 0 +++
[pid 2079] +++ exited with 0 +++
[pid 2077] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2077, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2080
./strace-static-x86_64: Process 2080 attached
[pid 2080] set_robust_list(0x5555560865e0, 24) = 0
[pid 2080] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2080] setpgid(0, 0) = 0
[pid 2080] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2080] write(3, "1000", 4) = 4
[pid 2080] close(3) = 0
[pid 2080] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2080] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2080] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2080] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2081], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2081
[pid 2080] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2080] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2081 attached
<unfinished ...>
[pid 2081] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2081] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2081] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2080] <... futex resumed>) = 0
[pid 2080] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2080] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2081] <... futex resumed>) = 1
[pid 2081] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2081] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2080] <... futex resumed>) = 0
[pid 2080] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2080] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2081] <... futex resumed>) = 1
[pid 2081] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2081] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2080] <... futex resumed>) = 0
[pid 2080] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2080] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2080] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2080] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2080] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2082], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2082
[pid 2080] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2080] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2081] <... futex resumed>) = 1
[pid 2081] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 2082 attached
) = 0
[pid 2081] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2082] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2081] <... futex resumed>) = 0
[pid 2081] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2082] <... set_robust_list resumed>) = 0
[pid 2082] umount2("./file0", MNT_DETACH) = 0
[pid 2082] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2080] <... futex resumed>) = 0
[pid 2082] <... futex resumed>) = 1
[pid 2080] exit_group(0) = ?
[pid 2081] <... futex resumed>) = ?
[pid 2081] +++ exited with 0 +++
[pid 2082] +++ exited with 0 +++
[pid 2080] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2080, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2083
./strace-static-x86_64: Process 2083 attached
[pid 2083] set_robust_list(0x5555560865e0, 24) = 0
[pid 2083] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2083] setpgid(0, 0) = 0
[pid 2083] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2083] write(3, "1000", 4) = 4
[pid 2083] close(3) = 0
[pid 2083] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2083] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2083] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2083] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2084], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2084
[pid 2083] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2083] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2084 attached
<unfinished ...>
[pid 2084] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2084] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2084] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2083] <... futex resumed>) = 0
[pid 2083] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2083] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2084] <... futex resumed>) = 1
[pid 2084] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2084] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2083] <... futex resumed>) = 0
[pid 2083] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2083] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2084] <... futex resumed>) = 1
[pid 2084] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2084] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2083] <... futex resumed>) = 0
[pid 2083] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2083] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2083] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2083] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2083] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2085], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2085
[pid 2083] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2083] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2084] <... futex resumed>) = 1
[pid 2084] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 2085 attached
) = 0
[pid 2084] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2085] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2084] <... futex resumed>) = 0
[pid 2085] <... set_robust_list resumed>) = 0
[pid 2084] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2085] umount2("./file0", MNT_DETACH) = 0
[pid 2085] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2083] <... futex resumed>) = 0
[pid 2085] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2083] exit_group(0) = ?
[pid 2084] <... futex resumed>) = ?
[pid 2085] <... futex resumed>) = ?
[pid 2085] +++ exited with 0 +++
[pid 2084] +++ exited with 0 +++
[pid 2083] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2083, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2086
./strace-static-x86_64: Process 2086 attached
[pid 2086] set_robust_list(0x5555560865e0, 24) = 0
[pid 2086] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2086] setpgid(0, 0) = 0
[pid 2086] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2086] write(3, "1000", 4) = 4
[pid 2086] close(3) = 0
[pid 2086] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2086] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2086] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2086] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2087 attached
, parent_tid=[2087], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2087
[pid 2087] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2087] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2086] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2087] <... futex resumed>) = 0
[pid 2087] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2087] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2086] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2087] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2086] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2086] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2087] <... futex resumed>) = 0
[pid 2087] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2086] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2087] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2087] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2086] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2086] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2087] <... futex resumed>) = 0
[pid 2087] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2086] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2087] <... mount resumed>) = 0
[pid 2087] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2087] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2086] <... futex resumed>) = 0
[pid 2086] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2087] <... futex resumed>) = 0
[pid 2087] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2086] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2087] <... umount2 resumed>) = 0
[pid 2087] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2087] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2086] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2086] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2086] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2088 attached
<unfinished ...>
[pid 2088] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2088] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2086] <... clone resumed>, parent_tid=[2088], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2088
[pid 2086] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2088] <... futex resumed>) = 0
[pid 2088] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2086] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2088] <... umount2 resumed>) = 0
[pid 2088] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2088] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2086] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2086] exit_group(0 <unfinished ...>
[pid 2087] <... futex resumed>) = ?
[pid 2086] <... exit_group resumed>) = ?
[pid 2087] +++ exited with 0 +++
[pid 2088] <... futex resumed>) = ?
[pid 2088] +++ exited with 0 +++
[pid 2086] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2086, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2089
./strace-static-x86_64: Process 2089 attached
[pid 2089] set_robust_list(0x5555560865e0, 24) = 0
[pid 2089] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2089] setpgid(0, 0) = 0
[pid 2089] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2089] write(3, "1000", 4) = 4
[pid 2089] close(3) = 0
[pid 2089] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2089] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2089] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2089] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2090 attached
<unfinished ...>
[pid 2090] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2090] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2089] <... clone resumed>, parent_tid=[2090], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2090
[pid 2089] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2090] <... futex resumed>) = 0
[pid 2090] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2090] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2090] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2089] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2089] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2090] <... futex resumed>) = 0
[pid 2090] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2090] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2090] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2089] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2089] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2090] <... futex resumed>) = 0
[pid 2090] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2089] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2090] <... mount resumed>) = 0
[pid 2090] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2089] <... futex resumed>) = 0
[pid 2090] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2089] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2090] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2089] <... futex resumed>) = 0
[pid 2090] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2089] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2090] <... umount2 resumed>) = 0
[pid 2089] <... futex resumed>) = 0
[pid 2090] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2089] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2090] <... futex resumed>) = 0
[pid 2089] <... mmap resumed>) = 0x7f236e446000
[pid 2090] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2089] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2089] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2091 attached
, parent_tid=[2091], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2091
[pid 2091] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2091] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2089] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2091] <... futex resumed>) = 0
[pid 2091] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2089] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2091] <... umount2 resumed>) = 0
[pid 2091] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2091] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2089] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2089] exit_group(0 <unfinished ...>
[pid 2090] <... futex resumed>) = 231
[pid 2089] <... exit_group resumed>) = ?
[pid 2091] <... futex resumed>) = ?
[pid 2091] +++ exited with 0 +++
[pid 2090] +++ exited with 0 +++
[pid 2089] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2089, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2092
./strace-static-x86_64: Process 2092 attached
[pid 2092] set_robust_list(0x5555560865e0, 24) = 0
[pid 2092] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2092] setpgid(0, 0) = 0
[pid 2092] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2092] write(3, "1000", 4) = 4
[pid 2092] close(3) = 0
[pid 2092] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2092] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2092] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2092] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2093 attached
, parent_tid=[2093], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2093
[pid 2093] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2093] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2092] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2093] <... futex resumed>) = 0
[pid 2093] mkdir("./file0", 000 <unfinished ...>
[pid 2092] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2093] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2093] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2093] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2092] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2092] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2093] <... futex resumed>) = 0
[pid 2093] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2092] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2093] <... mount resumed>) = 0
[pid 2093] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2093] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2092] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2092] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2093] <... futex resumed>) = 0
[pid 2093] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2092] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2093] <... mount resumed>) = 0
[pid 2093] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2093] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2092] <... futex resumed>) = 0
[pid 2092] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2093] <... futex resumed>) = 0
[pid 2093] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2092] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2093] <... umount2 resumed>) = 0
[pid 2093] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2093] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2092] <... futex resumed>) = 0
[pid 2092] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2092] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2092] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2094 attached
, parent_tid=[2094], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2094
[pid 2094] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2094] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2092] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2094] <... futex resumed>) = 0
[pid 2092] <... futex resumed>) = 1
[pid 2094] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2092] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2094] <... umount2 resumed>) = 0
[pid 2094] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2094] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2092] <... futex resumed>) = 0
[pid 2092] exit_group(0 <unfinished ...>
[pid 2093] <... futex resumed>) = ?
[pid 2092] <... exit_group resumed>) = ?
[pid 2093] +++ exited with 0 +++
[pid 2094] <... futex resumed>) = ?
[pid 2094] +++ exited with 0 +++
[pid 2092] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2092, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2095
./strace-static-x86_64: Process 2095 attached
[pid 2095] set_robust_list(0x5555560865e0, 24) = 0
[pid 2095] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2095] setpgid(0, 0) = 0
[pid 2095] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2095] write(3, "1000", 4) = 4
[pid 2095] close(3) = 0
[pid 2095] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2095] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2095] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2095] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2096 attached
, parent_tid=[2096], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2096
[pid 2096] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2095] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2096] <... set_robust_list resumed>) = 0
[pid 2095] <... futex resumed>) = 0
[pid 2095] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2096] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2096] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2095] <... futex resumed>) = 0
[pid 2096] <... futex resumed>) = 1
[pid 2095] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2096] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2095] <... futex resumed>) = 0
[pid 2095] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2096] <... mount resumed>) = 0
[pid 2096] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2095] <... futex resumed>) = 0
[pid 2096] <... futex resumed>) = 1
[pid 2095] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2096] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2095] <... futex resumed>) = 0
[pid 2095] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2096] <... mount resumed>) = 0
[pid 2096] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2095] <... futex resumed>) = 0
[pid 2096] <... futex resumed>) = 1
[pid 2095] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2096] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2095] <... futex resumed>) = 0
[pid 2095] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2095] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2095] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2095] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2096] <... umount2 resumed>) = 0
[pid 2096] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2097 attached
) = 0
[pid 2095] <... clone resumed>, parent_tid=[2097], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2097
[pid 2097] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2096] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2095] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2095] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2097] <... set_robust_list resumed>) = 0
[pid 2097] umount2("./file0", MNT_DETACH) = 0
[pid 2097] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2095] <... futex resumed>) = 0
[pid 2097] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2095] exit_group(0) = ?
[pid 2096] <... futex resumed>) = ?
[pid 2096] +++ exited with 0 +++
[pid 2097] <... futex resumed>) = ?
[pid 2097] +++ exited with 0 +++
[pid 2095] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2095, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2098 attached
, child_tidptr=0x5555560865d0) = 2098
[pid 2098] set_robust_list(0x5555560865e0, 24) = 0
[pid 2098] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2098] setpgid(0, 0) = 0
[pid 2098] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2098] write(3, "1000", 4) = 4
[pid 2098] close(3) = 0
[pid 2098] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2098] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2098] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2098] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2099], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2099
[pid 2098] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2098] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2099 attached
<unfinished ...>
[pid 2099] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2099] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2099] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2098] <... futex resumed>) = 0
[pid 2098] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2098] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2099] <... futex resumed>) = 1
[pid 2099] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2099] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2098] <... futex resumed>) = 0
[pid 2098] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2098] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2099] <... futex resumed>) = 1
[pid 2099] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2099] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2098] <... futex resumed>) = 0
[pid 2098] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2098] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2098] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2098] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2098] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2100], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2100
[pid 2098] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2098] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2099] <... futex resumed>) = 1
[pid 2099] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 2100 attached
<unfinished ...>
[pid 2100] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2099] <... umount2 resumed>) = 0
[pid 2099] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2100] <... set_robust_list resumed>) = 0
[pid 2099] <... futex resumed>) = 0
[pid 2099] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2100] umount2("./file0", MNT_DETACH) = 0
[pid 2100] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2098] <... futex resumed>) = 0
[pid 2098] exit_group(0) = ?
[pid 2099] <... futex resumed>) = ?
[pid 2099] +++ exited with 0 +++
[pid 2100] +++ exited with 0 +++
[pid 2098] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2098, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2101
./strace-static-x86_64: Process 2101 attached
[pid 2101] set_robust_list(0x5555560865e0, 24) = 0
[pid 2101] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2101] setpgid(0, 0) = 0
[pid 2101] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2101] write(3, "1000", 4) = 4
[pid 2101] close(3) = 0
[pid 2101] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2101] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2101] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2101] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2102 attached
, parent_tid=[2102], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2102
[pid 2102] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2102] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2101] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2102] <... futex resumed>) = 0
[pid 2102] mkdir("./file0", 000 <unfinished ...>
[pid 2101] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2102] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2102] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2101] <... futex resumed>) = 0
[pid 2101] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2101] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2102] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2102] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2101] <... futex resumed>) = 0
[pid 2101] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2101] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2102] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2102] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2101] <... futex resumed>) = 0
[pid 2101] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2101] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2101] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2101] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2101] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2103], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2103
[pid 2101] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2101] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2103 attached
<unfinished ...>
[pid 2103] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2103] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2102] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2103] <... umount2 resumed>) = 0
[pid 2103] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2101] <... futex resumed>) = 0
[pid 2103] <... futex resumed>) = 1
[pid 2103] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2102] <... umount2 resumed>) = 0
[pid 2102] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2102] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2101] exit_group(0) = ?
[pid 2102] <... futex resumed>) = ?
[pid 2102] +++ exited with 0 +++
[pid 2103] <... futex resumed>) = ?
[pid 2103] +++ exited with 0 +++
[pid 2101] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2101, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2104
./strace-static-x86_64: Process 2104 attached
[pid 2104] set_robust_list(0x5555560865e0, 24) = 0
[pid 2104] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2104] setpgid(0, 0) = 0
[pid 2104] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2104] write(3, "1000", 4) = 4
[pid 2104] close(3) = 0
[pid 2104] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2104] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2104] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2104] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2105 attached
, parent_tid=[2105], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2105
[pid 2105] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2105] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2104] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2105] <... futex resumed>) = 0
[pid 2105] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2105] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2105] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2104] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2104] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2105] <... futex resumed>) = 0
[pid 2105] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2104] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2105] <... mount resumed>) = 0
[pid 2105] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2105] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2104] <... futex resumed>) = 0
[pid 2104] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2105] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2104] <... futex resumed>) = 0
[pid 2104] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2105] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2105] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2105] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2104] <... futex resumed>) = 0
[pid 2104] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2104] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2104] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2105] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2104] <... mmap resumed>) = 0x7f236e446000
[pid 2104] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2105] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2104] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2106], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2106
[pid 2104] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2105] <... umount2 resumed>) = 0
[pid 2104] <... futex resumed>) = 0
[pid 2104] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2106 attached
<unfinished ...>
[pid 2106] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2106] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2105] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2106] <... umount2 resumed>) = 0
[pid 2106] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2104] <... futex resumed>) = 0
[pid 2105] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2104] exit_group(0) = ?
[pid 2105] <... futex resumed>) = ?
[pid 2105] +++ exited with 0 +++
[pid 2106] <... futex resumed>) = ?
[pid 2106] +++ exited with 0 +++
[pid 2104] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2104, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2107
./strace-static-x86_64: Process 2107 attached
[pid 2107] set_robust_list(0x5555560865e0, 24) = 0
[pid 2107] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2107] setpgid(0, 0) = 0
[pid 2107] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2107] write(3, "1000", 4) = 4
[pid 2107] close(3) = 0
[pid 2107] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2107] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2107] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2107] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2108 attached
, parent_tid=[2108], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2108
[pid 2107] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2107] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2108] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2108] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2108] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2107] <... futex resumed>) = 0
[pid 2107] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2107] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2108] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2108] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2107] <... futex resumed>) = 0
[pid 2107] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2107] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2108] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2108] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2107] <... futex resumed>) = 0
[pid 2108] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2107] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2107] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2107] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2107] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2107] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2108] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2107] <... clone resumed>, parent_tid=[2109], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2109
[pid 2108] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2107] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2107] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2109 attached
<unfinished ...>
[pid 2109] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2109] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2108] <... umount2 resumed>) = 0
[pid 2109] <... umount2 resumed>) = 0
[pid 2108] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2109] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2107] <... futex resumed>) = 0
[pid 2107] exit_group(0) = ?
[pid 2109] <... futex resumed>) = ?
[pid 2109] +++ exited with 0 +++
[pid 2108] <... futex resumed>) = ?
[pid 2108] +++ exited with 0 +++
[pid 2107] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2107, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2110 attached
, child_tidptr=0x5555560865d0) = 2110
[pid 2110] set_robust_list(0x5555560865e0, 24) = 0
[pid 2110] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2110] setpgid(0, 0) = 0
[pid 2110] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2110] write(3, "1000", 4) = 4
[pid 2110] close(3) = 0
[pid 2110] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2110] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2110] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2110] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2111 attached
<unfinished ...>
[pid 2111] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2111] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2110] <... clone resumed>, parent_tid=[2111], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2111
[pid 2110] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2111] <... futex resumed>) = 0
[pid 2110] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2111] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2111] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2111] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2110] <... futex resumed>) = 0
[pid 2110] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2111] <... futex resumed>) = 0
[pid 2111] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2110] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2111] <... mount resumed>) = 0
[pid 2111] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2111] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2110] <... futex resumed>) = 0
[pid 2110] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2111] <... futex resumed>) = 0
[pid 2111] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2110] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2111] <... mount resumed>) = 0
[pid 2111] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2110] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2111] <... futex resumed>) = 0
[pid 2110] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2111] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2110] <... futex resumed>) = 0
[pid 2111] <... umount2 resumed>) = 0
[pid 2111] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2111] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2110] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2111] <... futex resumed>) = 0
[pid 2110] <... futex resumed>) = 1
[pid 2111] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2110] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2111] <... umount2 resumed>) = 0
[pid 2111] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2110] <... futex resumed>) = 0
[pid 2111] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2110] exit_group(0) = ?
[pid 2111] <... futex resumed>) = ?
[pid 2111] +++ exited with 0 +++
[pid 2110] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2110, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2112
./strace-static-x86_64: Process 2112 attached
[pid 2112] set_robust_list(0x5555560865e0, 24) = 0
[pid 2112] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2112] setpgid(0, 0) = 0
[pid 2112] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2112] write(3, "1000", 4) = 4
[pid 2112] close(3) = 0
[pid 2112] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2112] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2112] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2112] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2113 attached
, parent_tid=[2113], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2113
[pid 2112] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2112] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2113] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2113] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2113] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2112] <... futex resumed>) = 0
[pid 2112] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2112] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2113] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2113] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2112] <... futex resumed>) = 0
[pid 2112] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2112] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2113] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2113] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2113] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2112] <... futex resumed>) = 0
[pid 2112] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2112] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2112] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2113] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2113] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2112] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2112] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2113] <... umount2 resumed>) = 0
[pid 2113] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 2114 attached
[pid 2112] <... clone resumed>, parent_tid=[2114], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2114
[pid 2112] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2114] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2113] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2112] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2114] <... set_robust_list resumed>) = 0
[pid 2114] umount2("./file0", MNT_DETACH) = 0
[pid 2114] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2112] <... futex resumed>) = 0
[pid 2112] exit_group(0) = ?
[pid 2113] <... futex resumed>) = ?
[pid 2113] +++ exited with 0 +++
[pid 2114] +++ exited with 0 +++
[pid 2112] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2112, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2115 attached
, child_tidptr=0x5555560865d0) = 2115
[pid 2115] set_robust_list(0x5555560865e0, 24) = 0
[pid 2115] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2115] setpgid(0, 0) = 0
[pid 2115] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2115] write(3, "1000", 4) = 4
[pid 2115] close(3) = 0
[pid 2115] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2115] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2115] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2115] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2116 attached
<unfinished ...>
[pid 2116] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2116] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2115] <... clone resumed>, parent_tid=[2116], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2116
[pid 2115] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2116] <... futex resumed>) = 0
[pid 2116] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2116] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2116] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2115] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2115] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2116] <... futex resumed>) = 0
[pid 2116] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2115] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2116] <... mount resumed>) = 0
[pid 2116] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2116] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2115] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2115] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2116] <... futex resumed>) = 0
[pid 2116] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2115] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2116] <... mount resumed>) = 0
[pid 2116] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2116] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2115] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2115] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2116] <... futex resumed>) = 0
[pid 2116] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2115] <... futex resumed>) = 1
[pid 2115] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2116] <... umount2 resumed>) = 0
[pid 2116] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2116] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2115] <... futex resumed>) = 0
[pid 2115] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2115] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2115] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2117 attached
<unfinished ...>
[pid 2117] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2117] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2115] <... clone resumed>, parent_tid=[2117], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2117
[pid 2115] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2117] <... futex resumed>) = 0
[pid 2115] <... futex resumed>) = 1
[pid 2117] umount2("./file0", MNT_DETACH) = 0
[pid 2115] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2117] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2117] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2115] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2115] exit_group(0 <unfinished ...>
[pid 2116] <... futex resumed>) = ?
[pid 2115] <... exit_group resumed>) = ?
[pid 2116] +++ exited with 0 +++
[pid 2117] <... futex resumed>) = ?
[pid 2117] +++ exited with 0 +++
[pid 2115] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2115, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2118
./strace-static-x86_64: Process 2118 attached
[pid 2118] set_robust_list(0x5555560865e0, 24) = 0
[pid 2118] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2118] setpgid(0, 0) = 0
[pid 2118] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2118] write(3, "1000", 4) = 4
[pid 2118] close(3) = 0
[pid 2118] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2118] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2118] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2118] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2119 attached
, parent_tid=[2119], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2119
[pid 2119] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2118] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2119] <... set_robust_list resumed>) = 0
[pid 2118] <... futex resumed>) = 0
[pid 2118] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2119] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2119] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2118] <... futex resumed>) = 0
[pid 2119] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2118] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2118] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2119] <... mount resumed>) = 0
[pid 2119] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2118] <... futex resumed>) = 0
[pid 2119] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2118] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2118] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2119] <... mount resumed>) = 0
[pid 2119] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2118] <... futex resumed>) = 0
[pid 2119] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2118] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2118] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2118] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2118] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2118] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2119] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2120 attached
[pid 2120] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2120] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2118] <... clone resumed>, parent_tid=[2120], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2120
[pid 2118] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2120] <... futex resumed>) = 0
[pid 2118] <... futex resumed>) = 1
[pid 2120] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2118] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2120] <... umount2 resumed>) = 0
[pid 2120] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2118] <... futex resumed>) = 0
[pid 2120] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2119] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2119] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2118] exit_group(0) = ?
[pid 2120] <... futex resumed>) = ?
[pid 2119] <... futex resumed>) = ?
[pid 2120] +++ exited with 0 +++
[pid 2119] +++ exited with 0 +++
[pid 2118] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2118, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2121
./strace-static-x86_64: Process 2121 attached
[pid 2121] set_robust_list(0x5555560865e0, 24) = 0
[pid 2121] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2121] setpgid(0, 0) = 0
[pid 2121] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2121] write(3, "1000", 4) = 4
[pid 2121] close(3) = 0
[pid 2121] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2121] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2121] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2121] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2122 attached
<unfinished ...>
[pid 2122] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2121] <... clone resumed>, parent_tid=[2122], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2122
[pid 2122] <... set_robust_list resumed>) = 0
[pid 2121] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2122] mkdir("./file0", 000 <unfinished ...>
[pid 2121] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2122] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2122] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2121] <... futex resumed>) = 0
[pid 2121] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2121] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2122] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2122] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2121] <... futex resumed>) = 0
[pid 2121] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2121] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2122] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2122] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2121] <... futex resumed>) = 0
[pid 2122] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2121] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2121] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2122] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2121] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2121] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2122] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2121] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2123], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2123
[pid 2121] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2121] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2123 attached
<unfinished ...>
[pid 2123] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2122] <... umount2 resumed>) = 0
[pid 2123] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2122] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2122] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2123] <... umount2 resumed>) = 0
[pid 2123] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2121] <... futex resumed>) = 0
[pid 2121] exit_group(0) = ?
[pid 2122] <... futex resumed>) = ?
[pid 2122] +++ exited with 0 +++
[pid 2123] +++ exited with 0 +++
[pid 2121] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2121, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2124
./strace-static-x86_64: Process 2124 attached
[pid 2124] set_robust_list(0x5555560865e0, 24) = 0
[pid 2124] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2124] setpgid(0, 0) = 0
[pid 2124] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2124] write(3, "1000", 4) = 4
[pid 2124] close(3) = 0
[pid 2124] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2124] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2124] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2124] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2125], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2125
[pid 2124] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2124] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2125 attached
<unfinished ...>
[pid 2125] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2125] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2125] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2124] <... futex resumed>) = 0
[pid 2124] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2124] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2125] <... futex resumed>) = 1
[pid 2125] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2125] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2124] <... futex resumed>) = 0
[pid 2124] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2124] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2125] <... futex resumed>) = 1
[pid 2125] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2125] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2124] <... futex resumed>) = 0
[pid 2124] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2124] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2124] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2125] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2124] <... mmap resumed>) = 0x7f236e446000
[pid 2124] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2124] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2125] <... umount2 resumed>) = 0
[pid 2124] <... clone resumed>, parent_tid=[2126], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2126
[pid 2125] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2124] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2124] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2126 attached
<unfinished ...>
[pid 2126] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2125] <... futex resumed>) = 0
[pid 2126] <... set_robust_list resumed>) = 0
[pid 2126] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2125] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2126] <... umount2 resumed>) = 0
[pid 2126] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2124] <... futex resumed>) = 0
[pid 2124] exit_group(0) = ?
[pid 2125] <... futex resumed>) = ?
[pid 2125] +++ exited with 0 +++
[pid 2126] <... futex resumed>) = ?
[pid 2126] +++ exited with 0 +++
[pid 2124] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2124, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2127
./strace-static-x86_64: Process 2127 attached
[pid 2127] set_robust_list(0x5555560865e0, 24) = 0
[pid 2127] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2127] setpgid(0, 0) = 0
[pid 2127] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2127] write(3, "1000", 4) = 4
[pid 2127] close(3) = 0
[pid 2127] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2127] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2127] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2127] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2128 attached
<unfinished ...>
[pid 2128] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2127] <... clone resumed>, parent_tid=[2128], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2128
[pid 2128] <... set_robust_list resumed>) = 0
[pid 2127] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2128] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2128] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2128] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2127] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2127] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2128] <... futex resumed>) = 0
[pid 2127] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2128] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2128] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2128] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2127] <... futex resumed>) = 0
[pid 2127] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2128] <... futex resumed>) = 0
[pid 2128] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2127] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2128] <... mount resumed>) = 0
[pid 2128] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2128] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2127] <... futex resumed>) = 0
[pid 2127] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2128] <... futex resumed>) = 0
[pid 2127] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2128] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2127] <... futex resumed>) = 0
[pid 2127] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2128] <... umount2 resumed>) = 0
[pid 2127] <... mmap resumed>) = 0x7f236e446000
[pid 2128] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2127] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2128] <... futex resumed>) = 0
[pid 2127] <... mprotect resumed>) = 0
[pid 2128] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2127] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2129 attached
, parent_tid=[2129], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2129
[pid 2129] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2127] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2129] <... set_robust_list resumed>) = 0
[pid 2127] <... futex resumed>) = 0
[pid 2129] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2127] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2129] <... umount2 resumed>) = 0
[pid 2129] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2127] <... futex resumed>) = 0
[pid 2127] exit_group(0 <unfinished ...>
[pid 2128] <... futex resumed>) = ?
[pid 2127] <... exit_group resumed>) = ?
[pid 2128] +++ exited with 0 +++
[pid 2129] <... futex resumed>) = ?
[pid 2129] +++ exited with 0 +++
[pid 2127] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2127, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2130
./strace-static-x86_64: Process 2130 attached
[pid 2130] set_robust_list(0x5555560865e0, 24) = 0
[pid 2130] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2130] setpgid(0, 0) = 0
[pid 2130] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2130] write(3, "1000", 4) = 4
[pid 2130] close(3) = 0
[pid 2130] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2130] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2130] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2130] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2131], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2131
[pid 2130] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2130] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2131 attached
<unfinished ...>
[pid 2131] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2131] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2131] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2130] <... futex resumed>) = 0
[pid 2130] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2130] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2131] <... futex resumed>) = 1
[pid 2131] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2131] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2130] <... futex resumed>) = 0
[pid 2130] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2130] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2131] <... futex resumed>) = 1
[pid 2131] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2131] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2130] <... futex resumed>) = 0
[pid 2130] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2130] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2130] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2130] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2130] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2132], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2132
[pid 2130] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2130] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2131] <... futex resumed>) = 1
[pid 2131] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 2132 attached
) = 0
[pid 2131] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2131] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2132] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2132] umount2("./file0", MNT_DETACH) = 0
[pid 2132] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2130] <... futex resumed>) = 0
[pid 2132] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2130] exit_group(0) = ?
[pid 2131] <... futex resumed>) = 231
[pid 2132] <... futex resumed>) = ?
[pid 2131] +++ exited with 0 +++
[pid 2132] +++ exited with 0 +++
[pid 2130] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2130, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2133
./strace-static-x86_64: Process 2133 attached
[pid 2133] set_robust_list(0x5555560865e0, 24) = 0
[pid 2133] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2133] setpgid(0, 0) = 0
[pid 2133] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2133] write(3, "1000", 4) = 4
[pid 2133] close(3) = 0
[pid 2133] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2133] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2133] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2133] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2134 attached
, parent_tid=[2134], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2134
[pid 2134] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2134] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2133] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2134] <... futex resumed>) = 0
[pid 2134] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2133] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2134] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2134] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2133] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2133] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2134] <... futex resumed>) = 0
[pid 2134] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2133] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2134] <... mount resumed>) = 0
[pid 2134] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2134] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2133] <... futex resumed>) = 0
[pid 2133] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2134] <... futex resumed>) = 0
[pid 2134] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2133] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2134] <... mount resumed>) = 0
[pid 2134] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2134] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2133] <... futex resumed>) = 0
[pid 2133] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2134] <... futex resumed>) = 0
[pid 2134] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2133] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2133] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2134] <... umount2 resumed>) = 0
[pid 2133] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2134] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2133] <... mprotect resumed>) = 0
[pid 2134] <... futex resumed>) = 0
[pid 2133] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2134] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2135 attached
<unfinished ...>
[pid 2133] <... clone resumed>, parent_tid=[2135], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2135
[pid 2135] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2133] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2135] <... set_robust_list resumed>) = 0
[pid 2133] <... futex resumed>) = 0
[pid 2135] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2133] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2135] <... umount2 resumed>) = 0
[pid 2135] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2133] <... futex resumed>) = 0
[pid 2135] <... futex resumed>) = 1
[pid 2135] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2133] exit_group(0) = ?
[pid 2134] <... futex resumed>) = ?
[pid 2134] +++ exited with 0 +++
[pid 2135] <... futex resumed>) = ?
[pid 2135] +++ exited with 0 +++
[pid 2133] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2133, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2136
./strace-static-x86_64: Process 2136 attached
[pid 2136] set_robust_list(0x5555560865e0, 24) = 0
[pid 2136] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2136] setpgid(0, 0) = 0
[pid 2136] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2136] write(3, "1000", 4) = 4
[pid 2136] close(3) = 0
[pid 2136] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2136] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2136] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2136] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2137], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2137
[pid 2136] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2136] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2137 attached
<unfinished ...>
[pid 2137] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2137] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2137] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2136] <... futex resumed>) = 0
[pid 2136] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2136] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2137] <... futex resumed>) = 1
[pid 2137] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2137] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2136] <... futex resumed>) = 0
[pid 2136] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2136] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2137] <... futex resumed>) = 1
[pid 2137] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2137] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2136] <... futex resumed>) = 0
[pid 2136] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2136] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2136] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2136] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2136] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2138], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2138
[pid 2136] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2136] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2137] <... futex resumed>) = 1
[pid 2137] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 2138 attached
<unfinished ...>
[pid 2138] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2137] <... umount2 resumed>) = 0
[pid 2137] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2137] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2138] <... set_robust_list resumed>) = 0
[pid 2138] umount2("./file0", MNT_DETACH) = 0
[pid 2138] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2136] <... futex resumed>) = 0
[pid 2136] exit_group(0) = ?
[pid 2137] <... futex resumed>) = ?
[pid 2137] +++ exited with 0 +++
[pid 2138] <... futex resumed>) = ?
[pid 2138] +++ exited with 0 +++
[pid 2136] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2136, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2139
./strace-static-x86_64: Process 2139 attached
[pid 2139] set_robust_list(0x5555560865e0, 24) = 0
[pid 2139] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2139] setpgid(0, 0) = 0
[pid 2139] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2139] write(3, "1000", 4) = 4
[pid 2139] close(3) = 0
[pid 2139] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2139] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2139] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2139] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2140], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2140
[pid 2139] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2139] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2140 attached
<unfinished ...>
[pid 2140] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2140] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2140] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2139] <... futex resumed>) = 0
[pid 2139] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2139] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2140] <... futex resumed>) = 1
[pid 2140] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2140] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2139] <... futex resumed>) = 0
[pid 2140] <... futex resumed>) = 1
[pid 2139] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2140] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2139] <... futex resumed>) = 0
[pid 2139] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2140] <... mount resumed>) = 0
[pid 2140] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2139] <... futex resumed>) = 0
[pid 2140] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2139] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2140] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2139] <... futex resumed>) = 0
[pid 2140] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2139] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2139] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2139] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2139] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2141 attached
<unfinished ...>
[pid 2140] <... umount2 resumed>) = 0
[pid 2139] <... clone resumed>, parent_tid=[2141], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2141
[pid 2141] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2140] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2141] <... set_robust_list resumed>) = 0
[pid 2139] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2140] <... futex resumed>) = 0
[pid 2141] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2139] <... futex resumed>) = 0
[pid 2140] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2139] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2141] <... umount2 resumed>) = 0
[pid 2141] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2139] <... futex resumed>) = 0
[pid 2141] <... futex resumed>) = 1
[pid 2139] exit_group(0 <unfinished ...>
[pid 2141] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2139] <... exit_group resumed>) = ?
[pid 2141] <... futex resumed>) = ?
[pid 2140] <... futex resumed>) = ?
[pid 2140] +++ exited with 0 +++
[pid 2141] +++ exited with 0 +++
[pid 2139] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2139, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2142
./strace-static-x86_64: Process 2142 attached
[pid 2142] set_robust_list(0x5555560865e0, 24) = 0
[pid 2142] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2142] setpgid(0, 0) = 0
[pid 2142] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2142] write(3, "1000", 4) = 4
[pid 2142] close(3) = 0
[pid 2142] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2142] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2142] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2142] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2143 attached
, parent_tid=[2143], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2143
[pid 2143] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2142] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2143] <... set_robust_list resumed>) = 0
[pid 2142] <... futex resumed>) = 0
[pid 2142] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2143] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2143] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2142] <... futex resumed>) = 0
[pid 2143] <... futex resumed>) = 1
[pid 2142] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2143] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2142] <... futex resumed>) = 0
[pid 2142] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2143] <... mount resumed>) = 0
[pid 2143] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2142] <... futex resumed>) = 0
[pid 2143] <... futex resumed>) = 1
[pid 2142] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2143] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2142] <... futex resumed>) = 0
[pid 2142] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2143] <... mount resumed>) = 0
[pid 2143] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2142] <... futex resumed>) = 0
[pid 2143] <... futex resumed>) = 1
[pid 2142] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2143] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2142] <... futex resumed>) = 0
[pid 2142] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2142] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2142] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2143] <... umount2 resumed>) = 0
[pid 2142] <... mprotect resumed>) = 0
[pid 2143] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2142] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2143] <... futex resumed>) = 0
[pid 2143] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2144 attached
<unfinished ...>
[pid 2142] <... clone resumed>, parent_tid=[2144], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2144
[pid 2144] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2142] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2144] <... set_robust_list resumed>) = 0
[pid 2142] <... futex resumed>) = 0
[pid 2144] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2142] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2144] <... umount2 resumed>) = 0
[pid 2144] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2142] <... futex resumed>) = 0
[pid 2144] <... futex resumed>) = 1
[pid 2144] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2142] exit_group(0) = ?
[pid 2143] <... futex resumed>) = 231
[pid 2144] <... futex resumed>) = ?
[pid 2143] +++ exited with 0 +++
[pid 2144] +++ exited with 0 +++
[pid 2142] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2142, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2145
./strace-static-x86_64: Process 2145 attached
[pid 2145] set_robust_list(0x5555560865e0, 24) = 0
[pid 2145] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2145] setpgid(0, 0) = 0
[pid 2145] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2145] write(3, "1000", 4) = 4
[pid 2145] close(3) = 0
[pid 2145] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2145] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2145] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2145] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2146 attached
, parent_tid=[2146], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2146
[pid 2146] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2145] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2145] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2146] <... set_robust_list resumed>) = 0
[pid 2146] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2146] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2145] <... futex resumed>) = 0
[pid 2146] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2145] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2145] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2146] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2146] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2146] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2145] <... futex resumed>) = 0
[pid 2145] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2145] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2146] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2146] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2145] <... futex resumed>) = 0
[pid 2145] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2145] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2145] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2145] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2146] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2145] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2147], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2147
[pid 2145] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2145] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2147 attached
<unfinished ...>
[pid 2147] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2147] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2146] <... umount2 resumed>) = 0
[pid 2147] <... umount2 resumed>) = 0
[pid 2147] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2145] <... futex resumed>) = 0
[pid 2147] <... futex resumed>) = 1
[pid 2147] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2146] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2146] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2145] exit_group(0) = ?
[pid 2147] <... futex resumed>) = ?
[pid 2147] +++ exited with 0 +++
[pid 2146] <... futex resumed>) = ?
[pid 2146] +++ exited with 0 +++
[pid 2145] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2145, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2148
./strace-static-x86_64: Process 2148 attached
[pid 2148] set_robust_list(0x5555560865e0, 24) = 0
[pid 2148] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2148] setpgid(0, 0) = 0
[pid 2148] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2148] write(3, "1000", 4) = 4
[pid 2148] close(3) = 0
[pid 2148] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2148] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2148] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2148] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2149], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2149
./strace-static-x86_64: Process 2149 attached
[pid 2149] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2149] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2148] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2149] <... futex resumed>) = 0
[pid 2149] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2149] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2149] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2148] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2148] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2149] <... futex resumed>) = 0
[pid 2149] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2148] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2149] <... mount resumed>) = 0
[pid 2149] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2149] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2148] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2148] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2149] <... futex resumed>) = 0
[pid 2148] <... futex resumed>) = 1
[pid 2149] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2148] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2149] <... mount resumed>) = 0
[pid 2149] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2149] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2148] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2148] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2148] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2148] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2148] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2148] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2150], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2150
[pid 2148] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2148] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2149] <... futex resumed>) = 0
[pid 2149] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 2150 attached
) = 0
[pid 2149] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2149] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2150] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2150] umount2("./file0", MNT_DETACH) = 0
[pid 2150] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2148] <... futex resumed>) = 0
[pid 2148] exit_group(0) = ?
[pid 2149] <... futex resumed>) = ?
[pid 2149] +++ exited with 0 +++
[pid 2150] +++ exited with 0 +++
[pid 2148] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2148, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2151
./strace-static-x86_64: Process 2151 attached
[pid 2151] set_robust_list(0x5555560865e0, 24) = 0
[pid 2151] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2151] setpgid(0, 0) = 0
[pid 2151] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2151] write(3, "1000", 4) = 4
[pid 2151] close(3) = 0
[pid 2151] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2151] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2151] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2151] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2152 attached
, parent_tid=[2152], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2152
[pid 2152] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2152] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2151] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2152] <... futex resumed>) = 0
[pid 2151] <... futex resumed>) = 1
[pid 2152] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2152] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2152] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2151] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2151] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2152] <... futex resumed>) = 0
[pid 2151] <... futex resumed>) = 1
[pid 2152] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2151] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2152] <... mount resumed>) = 0
[pid 2152] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2152] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2151] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2151] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2152] <... futex resumed>) = 0
[pid 2151] <... futex resumed>) = 1
[pid 2152] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2151] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2152] <... mount resumed>) = 0
[pid 2152] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2152] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2151] <... futex resumed>) = 0
[pid 2151] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2152] <... futex resumed>) = 0
[pid 2152] umount2("./file0", MNT_DETACH) = 0
[pid 2152] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2152] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2151] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2152] <... futex resumed>) = 0
[pid 2152] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2151] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2152] <... umount2 resumed>) = 0
[pid 2152] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2152] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2151] <... futex resumed>) = 0
[pid 2151] exit_group(0) = ?
[pid 2152] <... futex resumed>) = ?
[pid 2152] +++ exited with 0 +++
[pid 2151] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2151, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2153
./strace-static-x86_64: Process 2153 attached
[pid 2153] set_robust_list(0x5555560865e0, 24) = 0
[pid 2153] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2153] setpgid(0, 0) = 0
[pid 2153] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2153] write(3, "1000", 4) = 4
[pid 2153] close(3) = 0
[pid 2153] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2153] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2153] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2153] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2154 attached
, parent_tid=[2154], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2154
[pid 2154] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2153] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2154] <... set_robust_list resumed>) = 0
[pid 2153] <... futex resumed>) = 0
[pid 2153] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2154] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2154] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2153] <... futex resumed>) = 0
[pid 2154] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2153] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2154] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2153] <... futex resumed>) = 0
[pid 2154] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2153] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2154] <... mount resumed>) = 0
[pid 2154] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2153] <... futex resumed>) = 0
[pid 2153] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2154] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2153] <... futex resumed>) = 0
[pid 2153] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2154] <... mount resumed>) = 0
[pid 2154] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2153] <... futex resumed>) = 0
[pid 2153] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2153] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2153] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2154] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2153] <... mmap resumed>) = 0x7f236e446000
[pid 2153] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2154] <... umount2 resumed>) = 0
[pid 2153] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2154] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2155 attached
) = 0
[pid 2153] <... clone resumed>, parent_tid=[2155], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2155
[pid 2154] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2153] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2153] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2155] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2155] umount2("./file0", MNT_DETACH) = 0
[pid 2155] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2153] <... futex resumed>) = 0
[pid 2153] exit_group(0) = ?
[pid 2154] <... futex resumed>) = ?
[pid 2154] +++ exited with 0 +++
[pid 2155] +++ exited with 0 +++
[pid 2153] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2153, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2156
./strace-static-x86_64: Process 2156 attached
[pid 2156] set_robust_list(0x5555560865e0, 24) = 0
[pid 2156] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2156] setpgid(0, 0) = 0
[pid 2156] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2156] write(3, "1000", 4) = 4
[pid 2156] close(3) = 0
[pid 2156] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2156] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2156] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2156] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2157], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2157
[pid 2156] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2156] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2157 attached
<unfinished ...>
[pid 2157] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2157] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2157] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2156] <... futex resumed>) = 0
[pid 2156] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2157] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2156] <... futex resumed>) = 0
[pid 2156] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2157] <... mount resumed>) = 0
[pid 2157] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2156] <... futex resumed>) = 0
[pid 2156] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2157] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2156] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2157] <... mount resumed>) = 0
[pid 2157] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2156] <... futex resumed>) = 0
[pid 2157] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2156] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2157] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2156] <... futex resumed>) = 0
[pid 2156] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2156] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2156] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2157] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2156] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2158], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2158
[pid 2156] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2156] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2158 attached
<unfinished ...>
[pid 2158] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2158] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2157] <... umount2 resumed>) = 0
[pid 2158] <... umount2 resumed>) = 0
[pid 2157] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2158] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2156] <... futex resumed>) = 0
[pid 2156] exit_group(0) = ?
[pid 2158] <... futex resumed>) = ?
[pid 2157] <... futex resumed>) = ?
[pid 2157] +++ exited with 0 +++
[pid 2158] +++ exited with 0 +++
[pid 2156] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2156, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2159 attached
, child_tidptr=0x5555560865d0) = 2159
[pid 2159] set_robust_list(0x5555560865e0, 24) = 0
[pid 2159] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2159] setpgid(0, 0) = 0
[pid 2159] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2159] write(3, "1000", 4) = 4
[pid 2159] close(3) = 0
[pid 2159] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2159] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2159] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2159] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2160], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2160
[pid 2159] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2159] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2160 attached
<unfinished ...>
[pid 2160] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2160] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2160] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2159] <... futex resumed>) = 0
[pid 2159] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2159] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2160] <... futex resumed>) = 1
[pid 2160] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2160] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2159] <... futex resumed>) = 0
[pid 2159] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2159] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2160] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2160] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2159] <... futex resumed>) = 0
[pid 2159] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2159] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2159] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2159] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2159] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2161], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2161
[pid 2160] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2159] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2159] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2161 attached
<unfinished ...>
[pid 2161] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2161] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2160] <... umount2 resumed>) = 0
[pid 2161] <... umount2 resumed>) = 0
[pid 2161] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2159] <... futex resumed>) = 0
[pid 2161] <... futex resumed>) = 1
[pid 2160] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2161] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2160] <... futex resumed>) = 0
[pid 2160] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2159] exit_group(0) = ?
[pid 2161] <... futex resumed>) = ?
[pid 2160] <... futex resumed>) = ?
[pid 2161] +++ exited with 0 +++
[pid 2160] +++ exited with 0 +++
[pid 2159] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2159, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2162 attached
, child_tidptr=0x5555560865d0) = 2162
[pid 2162] set_robust_list(0x5555560865e0, 24) = 0
[pid 2162] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2162] setpgid(0, 0) = 0
[pid 2162] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2162] write(3, "1000", 4) = 4
[pid 2162] close(3) = 0
[pid 2162] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2162] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2162] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2162] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2163 attached
<unfinished ...>
[pid 2163] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2163] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2162] <... clone resumed>, parent_tid=[2163], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2163
[pid 2162] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2163] <... futex resumed>) = 0
[pid 2163] mkdir("./file0", 000 <unfinished ...>
[pid 2162] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2163] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2163] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2163] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2162] <... futex resumed>) = 0
[pid 2162] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2163] <... futex resumed>) = 0
[pid 2163] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2162] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2163] <... mount resumed>) = 0
[pid 2163] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2162] <... futex resumed>) = 0
[pid 2163] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2162] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2163] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2163] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2162] <... futex resumed>) = 0
[pid 2163] <... mount resumed>) = 0
[pid 2163] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2162] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2163] <... futex resumed>) = 0
[pid 2163] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2162] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2162] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2163] <... futex resumed>) = 0
[pid 2162] <... futex resumed>) = 1
[pid 2163] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2162] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2162] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2162] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2162] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2163] <... umount2 resumed>) = 0
[pid 2163] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2163] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2164 attached
<unfinished ...>
[pid 2164] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2164] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2162] <... clone resumed>, parent_tid=[2164], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2164
[pid 2162] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2162] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2164] <... futex resumed>) = 0
[pid 2164] umount2("./file0", MNT_DETACH) = 0
[pid 2164] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2162] <... futex resumed>) = 0
[pid 2164] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2162] exit_group(0) = ?
[pid 2163] <... futex resumed>) = ?
[pid 2163] +++ exited with 0 +++
[pid 2164] <... futex resumed>) = ?
[pid 2164] +++ exited with 0 +++
[pid 2162] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2162, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2165
./strace-static-x86_64: Process 2165 attached
[pid 2165] set_robust_list(0x5555560865e0, 24) = 0
[pid 2165] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2165] setpgid(0, 0) = 0
[pid 2165] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2165] write(3, "1000", 4) = 4
[pid 2165] close(3) = 0
[pid 2165] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2165] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2165] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2165] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2166 attached
, parent_tid=[2166], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2166
[pid 2166] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2166] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2165] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2166] <... futex resumed>) = 0
[pid 2165] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2166] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2166] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2166] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2165] <... futex resumed>) = 0
[pid 2165] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2166] <... futex resumed>) = 0
[pid 2165] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2166] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2166] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2165] <... futex resumed>) = 0
[pid 2166] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2165] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2166] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2165] <... futex resumed>) = 0
[pid 2166] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2165] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2166] <... mount resumed>) = 0
[pid 2166] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2165] <... futex resumed>) = 0
[pid 2165] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2166] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2165] <... futex resumed>) = 0
[pid 2165] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2165] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2165] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2165] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2166] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2167 attached
[pid 2166] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2167] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2166] <... futex resumed>) = 0
[pid 2165] <... clone resumed>, parent_tid=[2167], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2167
[pid 2165] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2166] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2165] <... futex resumed>) = 0
[pid 2165] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2167] <... set_robust_list resumed>) = 0
[pid 2167] umount2("./file0", MNT_DETACH) = 0
[pid 2167] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2165] <... futex resumed>) = 0
[pid 2167] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2165] exit_group(0) = ?
[pid 2166] <... futex resumed>) = ?
[pid 2167] <... futex resumed>) = ?
[pid 2167] +++ exited with 0 +++
[pid 2166] +++ exited with 0 +++
[pid 2165] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2165, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2168 attached
, child_tidptr=0x5555560865d0) = 2168
[pid 2168] set_robust_list(0x5555560865e0, 24) = 0
[pid 2168] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2168] setpgid(0, 0) = 0
[pid 2168] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2168] write(3, "1000", 4) = 4
[pid 2168] close(3) = 0
[pid 2168] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2168] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2168] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2168] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2169 attached
, parent_tid=[2169], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2169
[pid 2169] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2169] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2168] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2168] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2169] <... futex resumed>) = 0
[pid 2169] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2169] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2169] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2168] <... futex resumed>) = 0
[pid 2168] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2169] <... futex resumed>) = 0
[pid 2168] <... futex resumed>) = 1
[pid 2169] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2168] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2169] <... mount resumed>) = 0
[pid 2169] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2169] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2168] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2168] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2169] <... futex resumed>) = 0
[pid 2169] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2168] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2169] <... mount resumed>) = 0
[pid 2169] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2168] <... futex resumed>) = 0
[pid 2168] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2168] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2168] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2168] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2168] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2170], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2170
[pid 2168] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2168] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2169] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 2170 attached
<unfinished ...>
[pid 2170] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2170] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2169] <... umount2 resumed>) = 0
[pid 2170] <... umount2 resumed>) = 0
[pid 2169] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2170] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2168] <... futex resumed>) = 0
[pid 2168] exit_group(0) = ?
[pid 2170] <... futex resumed>) = ?
[pid 2170] +++ exited with 0 +++
[pid 2169] <... futex resumed>) = ? <unavailable>
[pid 2169] +++ exited with 0 +++
[pid 2168] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2168, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2171
./strace-static-x86_64: Process 2171 attached
[pid 2171] set_robust_list(0x5555560865e0, 24) = 0
[pid 2171] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2171] setpgid(0, 0) = 0
[pid 2171] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2171] write(3, "1000", 4) = 4
[pid 2171] close(3) = 0
[pid 2171] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2171] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2171] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2171] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2172], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2172
[pid 2171] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2171] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2172 attached
<unfinished ...>
[pid 2172] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2172] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2172] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2171] <... futex resumed>) = 0
[pid 2171] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2171] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2172] <... futex resumed>) = 1
[pid 2172] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2172] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2171] <... futex resumed>) = 0
[pid 2172] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2171] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2172] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2171] <... futex resumed>) = 0
[pid 2172] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2171] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2172] <... mount resumed>) = 0
[pid 2172] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2171] <... futex resumed>) = 0
[pid 2172] <... futex resumed>) = 1
[pid 2171] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2172] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2171] <... futex resumed>) = 0
[pid 2171] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2171] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2171] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2171] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2172] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2173 attached
[pid 2172] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2171] <... clone resumed>, parent_tid=[2173], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2173
[pid 2173] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2172] <... futex resumed>) = 0
[pid 2173] <... set_robust_list resumed>) = 0
[pid 2171] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2172] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2173] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2171] <... futex resumed>) = 0
[pid 2171] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2173] <... umount2 resumed>) = 0
[pid 2173] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2171] <... futex resumed>) = 0
[pid 2173] <... futex resumed>) = 1
[pid 2171] exit_group(0 <unfinished ...>
[pid 2173] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2171] <... exit_group resumed>) = ?
[pid 2172] <... futex resumed>) = -1 (errno 18446744073709551414)
[pid 2173] <... futex resumed>) = ?
[pid 2172] +++ exited with 0 +++
[pid 2173] +++ exited with 0 +++
[pid 2171] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2171, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2174
./strace-static-x86_64: Process 2174 attached
[pid 2174] set_robust_list(0x5555560865e0, 24) = 0
[pid 2174] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2174] setpgid(0, 0) = 0
[pid 2174] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2174] write(3, "1000", 4) = 4
[pid 2174] close(3) = 0
[pid 2174] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2174] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2174] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2174] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2175 attached
, parent_tid=[2175], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2175
[pid 2175] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2175] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2174] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2175] <... futex resumed>) = 0
[pid 2174] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2175] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2175] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2175] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2174] <... futex resumed>) = 0
[pid 2174] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2175] <... futex resumed>) = 0
[pid 2175] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2174] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2175] <... mount resumed>) = 0
[pid 2175] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2175] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2174] <... futex resumed>) = 0
[pid 2174] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2175] <... futex resumed>) = 0
[pid 2174] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2175] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2175] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2174] <... futex resumed>) = 0
[pid 2174] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2174] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2174] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2174] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2174] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2176 attached
, parent_tid=[2176], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2176
[pid 2174] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2174] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2175] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2176] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2175] <... umount2 resumed>) = 0
[pid 2175] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2175] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2176] umount2("./file0", MNT_DETACH) = 0
[pid 2176] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2174] <... futex resumed>) = 0
[pid 2174] exit_group(0) = ?
[pid 2175] <... futex resumed>) = ?
[pid 2175] +++ exited with 0 +++
[pid 2176] +++ exited with 0 +++
[pid 2174] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2174, si_uid=0, si_status=0, si_utime=0, si_stime=1} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2177
./strace-static-x86_64: Process 2177 attached
[pid 2177] set_robust_list(0x5555560865e0, 24) = 0
[pid 2177] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2177] setpgid(0, 0) = 0
[pid 2177] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2177] write(3, "1000", 4) = 4
[pid 2177] close(3) = 0
[pid 2177] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2177] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2177] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2177] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2178], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2178
[pid 2177] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2177] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2178 attached
<unfinished ...>
[pid 2178] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2178] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2178] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2177] <... futex resumed>) = 0
[pid 2177] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2177] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2178] <... futex resumed>) = 1
[pid 2178] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2178] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2177] <... futex resumed>) = 0
[pid 2177] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2177] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2178] <... futex resumed>) = 1
[pid 2178] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2178] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2177] <... futex resumed>) = 0
[pid 2177] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2177] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2177] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2177] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2177] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2179], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2179
[pid 2177] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2177] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2178] <... futex resumed>) = 1
[pid 2178] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 2179 attached
) = 0
[pid 2178] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2179] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2178] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2179] <... set_robust_list resumed>) = 0
[pid 2179] umount2("./file0", MNT_DETACH) = 0
[pid 2179] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2177] <... futex resumed>) = 0
[pid 2177] exit_group(0 <unfinished ...>
[pid 2179] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2177] <... exit_group resumed>) = ?
[pid 2178] <... futex resumed>) = -1 (errno 18446744073709551414)
[pid 2179] <... futex resumed>) = ?
[pid 2179] +++ exited with 0 +++
[pid 2178] +++ exited with 0 +++
[pid 2177] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2177, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2180
./strace-static-x86_64: Process 2180 attached
[pid 2180] set_robust_list(0x5555560865e0, 24) = 0
[pid 2180] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2180] setpgid(0, 0) = 0
[pid 2180] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2180] write(3, "1000", 4) = 4
[pid 2180] close(3) = 0
[pid 2180] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2180] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2180] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2180] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2181], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2181
[pid 2180] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2180] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2181 attached
<unfinished ...>
[pid 2181] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2181] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2181] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2180] <... futex resumed>) = 0
[pid 2180] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2180] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2181] <... futex resumed>) = 1
[pid 2181] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2181] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2180] <... futex resumed>) = 0
[pid 2180] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2180] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2181] <... futex resumed>) = 1
[pid 2181] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2181] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2180] <... futex resumed>) = 0
[pid 2181] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2180] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2181] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2180] <... futex resumed>) = 0
[pid 2181] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2180] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2180] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2180] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2180] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2182], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2182
[pid 2180] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2182 attached
<unfinished ...>
[pid 2181] <... umount2 resumed>) = 0
[pid 2180] <... futex resumed>) = 0
[pid 2181] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2180] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2182] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2181] <... futex resumed>) = 0
[pid 2182] <... set_robust_list resumed>) = 0
[pid 2181] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2182] umount2("./file0", MNT_DETACH) = 0
[pid 2182] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2180] <... futex resumed>) = 0
[pid 2182] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2180] exit_group(0) = ?
[pid 2181] <... futex resumed>) = ?
[pid 2182] <... futex resumed>) = ?
[pid 2181] +++ exited with 0 +++
[pid 2182] +++ exited with 0 +++
[pid 2180] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2180, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2183
./strace-static-x86_64: Process 2183 attached
[pid 2183] set_robust_list(0x5555560865e0, 24) = 0
[pid 2183] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2183] setpgid(0, 0) = 0
[pid 2183] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2183] write(3, "1000", 4) = 4
[pid 2183] close(3) = 0
[pid 2183] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2183] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2183] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2183] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2184 attached
, parent_tid=[2184], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2184
[pid 2184] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2184] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2183] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2184] <... futex resumed>) = 0
[pid 2184] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2184] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2184] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2183] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2183] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2184] <... futex resumed>) = 0
[pid 2184] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2183] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2184] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2184] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2183] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2183] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2184] <... futex resumed>) = 0
[pid 2184] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2183] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2184] <... mount resumed>) = 0
[pid 2184] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2184] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2183] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2183] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2184] <... futex resumed>) = 0
[pid 2184] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2183] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2184] <... umount2 resumed>) = 0
[pid 2183] <... futex resumed>) = 0
[pid 2184] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2184] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2183] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2183] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2183] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2185 attached
, parent_tid=[2185], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2185
[pid 2185] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2185] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2183] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2185] <... futex resumed>) = 0
[pid 2185] umount2("./file0", MNT_DETACH) = 0
[pid 2183] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2185] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2185] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2183] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2183] exit_group(0 <unfinished ...>
[pid 2184] <... futex resumed>) = ?
[pid 2183] <... exit_group resumed>) = ?
[pid 2184] +++ exited with 0 +++
[pid 2185] <... futex resumed>) = ?
[pid 2185] +++ exited with 0 +++
[pid 2183] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2183, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2186
./strace-static-x86_64: Process 2186 attached
[pid 2186] set_robust_list(0x5555560865e0, 24) = 0
[pid 2186] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2186] setpgid(0, 0) = 0
[pid 2186] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2186] write(3, "1000", 4) = 4
[pid 2186] close(3) = 0
[pid 2186] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2186] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2186] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2186] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2187], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2187
[pid 2186] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2186] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2187 attached
<unfinished ...>
[pid 2187] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2187] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2187] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2186] <... futex resumed>) = 0
[pid 2186] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2186] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2187] <... futex resumed>) = 1
[pid 2187] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2187] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2186] <... futex resumed>) = 0
[pid 2186] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2186] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2187] <... futex resumed>) = 1
[pid 2187] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2187] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2186] <... futex resumed>) = 0
[pid 2186] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2186] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2186] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2186] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2186] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2188], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2188
[pid 2186] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2186] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2187] <... futex resumed>) = 1
[pid 2187] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 2188 attached
) = 0
[pid 2187] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2188] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2187] <... futex resumed>) = 0
[pid 2188] <... set_robust_list resumed>) = 0
[pid 2187] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2188] umount2("./file0", MNT_DETACH) = 0
[pid 2188] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2186] <... futex resumed>) = 0
[pid 2186] exit_group(0 <unfinished ...>
[pid 2188] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2186] <... exit_group resumed>) = ?
[pid 2187] <... futex resumed>) = ?
[pid 2188] <... futex resumed>) = ?
[pid 2188] +++ exited with 0 +++
[pid 2187] +++ exited with 0 +++
[pid 2186] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2186, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2189 attached
, child_tidptr=0x5555560865d0) = 2189
[pid 2189] set_robust_list(0x5555560865e0, 24) = 0
[pid 2189] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2189] setpgid(0, 0) = 0
[pid 2189] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2189] write(3, "1000", 4) = 4
[pid 2189] close(3) = 0
[pid 2189] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2189] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2189] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2189] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2190], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2190
./strace-static-x86_64: Process 2190 attached
[pid 2190] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2190] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2189] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2190] <... futex resumed>) = 0
[pid 2190] mkdir("./file0", 000 <unfinished ...>
[pid 2189] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2190] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2190] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2190] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2189] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2189] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2190] <... futex resumed>) = 0
[pid 2190] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2189] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2190] <... mount resumed>) = 0
[pid 2190] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2190] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2189] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2189] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2190] <... futex resumed>) = 0
[pid 2190] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2189] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2190] <... mount resumed>) = 0
[pid 2190] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2189] <... futex resumed>) = 0
[pid 2190] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2189] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2190] <... futex resumed>) = 0
[pid 2190] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2189] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2190] <... umount2 resumed>) = 0
[pid 2189] <... futex resumed>) = 0
[pid 2190] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2189] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2190] <... futex resumed>) = 0
[pid 2190] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2189] <... mmap resumed>) = 0x7f236e446000
[pid 2189] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2189] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2191 attached
, parent_tid=[2191], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2191
[pid 2191] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2191] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2189] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2191] <... futex resumed>) = 0
[pid 2191] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2189] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2191] <... umount2 resumed>) = 0
[pid 2191] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2189] <... futex resumed>) = 0
[pid 2191] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2189] exit_group(0 <unfinished ...>
[pid 2191] <... futex resumed>) = ?
[pid 2190] <... futex resumed>) = ?
[pid 2189] <... exit_group resumed>) = ?
[pid 2190] +++ exited with 0 +++
[pid 2191] +++ exited with 0 +++
[pid 2189] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2189, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2192
./strace-static-x86_64: Process 2192 attached
[pid 2192] set_robust_list(0x5555560865e0, 24) = 0
[pid 2192] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2192] setpgid(0, 0) = 0
[pid 2192] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2192] write(3, "1000", 4) = 4
[pid 2192] close(3) = 0
[pid 2192] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2192] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2192] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2192] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2193 attached
, parent_tid=[2193], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2193
[pid 2193] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2192] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2193] <... set_robust_list resumed>) = 0
[pid 2192] <... futex resumed>) = 0
[pid 2192] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2193] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2193] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2192] <... futex resumed>) = 0
[pid 2192] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2192] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2193] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2193] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2192] <... futex resumed>) = 0
[pid 2193] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2192] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2192] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2193] <... mount resumed>) = 0
[pid 2193] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2192] <... futex resumed>) = 0
[pid 2193] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2192] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2192] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2192] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2192] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2192] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2193] <... umount2 resumed>) = 0
[pid 2193] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2193] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2192] <... clone resumed>, parent_tid=[2194], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2194
[pid 2192] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 2194 attached
[pid 2194] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2192] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2194] <... set_robust_list resumed>) = 0
[pid 2194] umount2("./file0", MNT_DETACH) = 0
[pid 2194] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2192] <... futex resumed>) = 0
[pid 2192] exit_group(0) = ?
[pid 2193] <... futex resumed>) = ?
[pid 2193] +++ exited with 0 +++
[pid 2194] +++ exited with 0 +++
[pid 2192] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2192, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2195
./strace-static-x86_64: Process 2195 attached
[pid 2195] set_robust_list(0x5555560865e0, 24) = 0
[pid 2195] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2195] setpgid(0, 0) = 0
[pid 2195] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2195] write(3, "1000", 4) = 4
[pid 2195] close(3) = 0
[pid 2195] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2195] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2195] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2195] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2196 attached
<unfinished ...>
[pid 2196] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2196] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2195] <... clone resumed>, parent_tid=[2196], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2196
[pid 2195] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2196] <... futex resumed>) = 0
[pid 2196] mkdir("./file0", 000 <unfinished ...>
[pid 2195] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2196] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2196] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2196] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2195] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2195] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2196] <... futex resumed>) = 0
[pid 2196] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2195] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2196] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2196] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2195] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2195] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2196] <... futex resumed>) = 0
[pid 2196] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2195] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2196] <... mount resumed>) = 0
[pid 2196] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2196] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2195] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2195] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2196] <... futex resumed>) = 0
[pid 2196] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2195] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2196] <... umount2 resumed>) = 0
[pid 2196] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2196] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2195] <... futex resumed>) = 0
[pid 2195] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2195] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2195] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2197 attached
, parent_tid=[2197], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2197
[pid 2197] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2197] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2195] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2197] <... futex resumed>) = 0
[pid 2195] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2197] umount2("./file0", MNT_DETACH) = 0
[pid 2197] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2197] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2195] <... futex resumed>) = 0
[pid 2195] exit_group(0 <unfinished ...>
[pid 2196] <... futex resumed>) = ?
[pid 2195] <... exit_group resumed>) = ?
[pid 2196] +++ exited with 0 +++
[pid 2197] <... futex resumed>) = ?
[pid 2197] +++ exited with 0 +++
[pid 2195] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2195, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2198
./strace-static-x86_64: Process 2198 attached
[pid 2198] set_robust_list(0x5555560865e0, 24) = 0
[pid 2198] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2198] setpgid(0, 0) = 0
[pid 2198] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2198] write(3, "1000", 4) = 4
[pid 2198] close(3) = 0
[pid 2198] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2198] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2198] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2198] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2199 attached
<unfinished ...>
[pid 2199] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2199] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2198] <... clone resumed>, parent_tid=[2199], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2199
[pid 2198] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2198] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2199] <... futex resumed>) = 0
[pid 2199] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2199] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2199] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2198] <... futex resumed>) = 0
[pid 2198] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2199] <... futex resumed>) = 0
[pid 2198] <... futex resumed>) = 1
[pid 2199] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2198] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2199] <... mount resumed>) = 0
[pid 2199] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2198] <... futex resumed>) = 0
[pid 2199] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2198] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2199] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2198] <... futex resumed>) = 0
[pid 2199] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2198] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2199] <... mount resumed>) = 0
[pid 2199] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2198] <... futex resumed>) = 0
[pid 2199] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2198] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2198] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2198] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2198] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2198] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2199] <... umount2 resumed>) = 0
[pid 2199] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2198] <... clone resumed>, parent_tid=[2200], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2200
[pid 2198] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2198] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2199] <... futex resumed>) = 0
[pid 2199] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2200 attached
<unfinished ...>
[pid 2200] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2200] umount2("./file0", MNT_DETACH) = 0
[pid 2200] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2198] <... futex resumed>) = 0
[pid 2198] exit_group(0) = ?
[pid 2199] <... futex resumed>) = ?
[pid 2199] +++ exited with 0 +++
[pid 2200] +++ exited with 0 +++
[pid 2198] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2198, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2201
./strace-static-x86_64: Process 2201 attached
[pid 2201] set_robust_list(0x5555560865e0, 24) = 0
[pid 2201] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2201] setpgid(0, 0) = 0
[pid 2201] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2201] write(3, "1000", 4) = 4
[pid 2201] close(3) = 0
[pid 2201] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2201] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2201] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2201] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2202 attached
<unfinished ...>
[pid 2202] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2202] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2201] <... clone resumed>, parent_tid=[2202], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2202
[pid 2201] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2202] <... futex resumed>) = 0
[pid 2202] mkdir("./file0", 000 <unfinished ...>
[pid 2201] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2202] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2202] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2202] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2201] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2201] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2202] <... futex resumed>) = 0
[pid 2202] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2201] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2202] <... mount resumed>) = 0
[pid 2202] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2202] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2201] <... futex resumed>) = 0
[pid 2201] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2202] <... futex resumed>) = 0
[pid 2202] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2201] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2202] <... mount resumed>) = 0
[pid 2202] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2202] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2201] <... futex resumed>) = 0
[pid 2201] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2202] <... futex resumed>) = 0
[pid 2202] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2201] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2202] <... umount2 resumed>) = 0
[pid 2202] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2201] <... futex resumed>) = 0
[pid 2202] <... futex resumed>) = 0
[pid 2201] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2202] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2201] <... mmap resumed>) = 0x7f236e446000
[pid 2201] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2201] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2203 attached
, parent_tid=[2203], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2203
[pid 2203] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2201] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2203] <... set_robust_list resumed>) = 0
[pid 2203] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2201] <... futex resumed>) = 0
[pid 2203] <... umount2 resumed>) = 0
[pid 2201] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2203] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2201] <... futex resumed>) = 0
[pid 2203] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2201] exit_group(0) = ?
[pid 2202] <... futex resumed>) = ?
[pid 2202] +++ exited with 0 +++
[pid 2203] <... futex resumed>) = ?
[pid 2203] +++ exited with 0 +++
[pid 2201] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2201, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2204
./strace-static-x86_64: Process 2204 attached
[pid 2204] set_robust_list(0x5555560865e0, 24) = 0
[pid 2204] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2204] setpgid(0, 0) = 0
[pid 2204] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2204] write(3, "1000", 4) = 4
[pid 2204] close(3) = 0
[pid 2204] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2204] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2204] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2204] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2205], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2205
[pid 2204] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2204] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2205 attached
<unfinished ...>
[pid 2205] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2205] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2205] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2204] <... futex resumed>) = 0
[pid 2204] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2204] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2205] <... futex resumed>) = 1
[pid 2205] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2205] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2204] <... futex resumed>) = 0
[pid 2204] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2204] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2205] <... futex resumed>) = 1
[pid 2205] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2205] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2204] <... futex resumed>) = 0
[pid 2205] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2204] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2204] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2204] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2205] <... umount2 resumed>) = 0
[pid 2204] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2205] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2204] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2205] <... futex resumed>) = 0
./strace-static-x86_64: Process 2206 attached
[pid 2205] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2204] <... clone resumed>, parent_tid=[2206], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2206
[pid 2204] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2204] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2206] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2206] umount2("./file0", MNT_DETACH) = 0
[pid 2206] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2204] <... futex resumed>) = 0
[pid 2204] exit_group(0) = ?
[pid 2205] <... futex resumed>) = ?
[pid 2205] +++ exited with 0 +++
[pid 2206] +++ exited with 0 +++
[pid 2204] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2204, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2207
./strace-static-x86_64: Process 2207 attached
[pid 2207] set_robust_list(0x5555560865e0, 24) = 0
[pid 2207] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2207] setpgid(0, 0) = 0
[pid 2207] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2207] write(3, "1000", 4) = 4
[pid 2207] close(3) = 0
[pid 2207] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2207] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2207] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2207] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2208], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2208
[pid 2207] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2207] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2208 attached
<unfinished ...>
[pid 2208] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2208] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2208] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2207] <... futex resumed>) = 0
[pid 2207] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2207] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2208] <... futex resumed>) = 1
[pid 2208] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2208] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2207] <... futex resumed>) = 0
[pid 2207] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2207] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2208] <... futex resumed>) = 1
[pid 2208] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2208] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2207] <... futex resumed>) = 0
[pid 2207] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2207] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2207] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2207] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2207] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2209], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2209
[pid 2207] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2207] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2208] <... futex resumed>) = 1
[pid 2208] umount2("./file0", MNT_DETACH) = 0
[pid 2208] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2208] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2209 attached
<unfinished ...>
[pid 2209] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2209] umount2("./file0", MNT_DETACH) = 0
[pid 2209] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2207] <... futex resumed>) = 0
[pid 2207] exit_group(0) = ?
[pid 2209] <... futex resumed>) = ?
[pid 2208] <... futex resumed>) = ?
[pid 2208] +++ exited with 0 +++
[pid 2209] +++ exited with 0 +++
[pid 2207] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2207, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2210 attached
, child_tidptr=0x5555560865d0) = 2210
[pid 2210] set_robust_list(0x5555560865e0, 24) = 0
[pid 2210] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2210] setpgid(0, 0) = 0
[pid 2210] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2210] write(3, "1000", 4) = 4
[pid 2210] close(3) = 0
[pid 2210] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2210] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2210] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2210] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2211 attached
<unfinished ...>
[pid 2211] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2211] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2210] <... clone resumed>, parent_tid=[2211], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2211
[pid 2210] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2211] <... futex resumed>) = 0
[pid 2211] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2211] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2211] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2210] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2210] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2211] <... futex resumed>) = 0
[pid 2211] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2210] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2211] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2210] <... futex resumed>) = 0
[pid 2210] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2210] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2211] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2211] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2210] <... futex resumed>) = 0
[pid 2211] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2210] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2211] <... umount2 resumed>) = 0
[pid 2210] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2211] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2210] <... futex resumed>) = 0
[pid 2211] <... futex resumed>) = 0
[pid 2210] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2211] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2210] <... mmap resumed>) = 0x7f236e446000
[pid 2210] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2210] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2212], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2212
./strace-static-x86_64: Process 2212 attached
[pid 2212] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2212] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2210] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2212] <... futex resumed>) = 0
[pid 2212] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2210] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2212] <... umount2 resumed>) = 0
[pid 2212] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2212] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2210] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2210] exit_group(0 <unfinished ...>
[pid 2211] <... futex resumed>) = 231
[pid 2210] <... exit_group resumed>) = ?
[pid 2212] <... futex resumed>) = ?
[pid 2212] +++ exited with 0 +++
[pid 2211] +++ exited with 0 +++
[pid 2210] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2210, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2213
./strace-static-x86_64: Process 2213 attached
[pid 2213] set_robust_list(0x5555560865e0, 24) = 0
[pid 2213] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2213] setpgid(0, 0) = 0
[pid 2213] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2213] write(3, "1000", 4) = 4
[pid 2213] close(3) = 0
[pid 2213] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2213] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2213] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2213] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2214 attached
, parent_tid=[2214], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2214
[pid 2214] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2213] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2214] <... set_robust_list resumed>) = 0
[pid 2213] <... futex resumed>) = 0
[pid 2213] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2214] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2214] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2213] <... futex resumed>) = 0
[pid 2213] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2214] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2213] <... futex resumed>) = 0
[pid 2213] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2214] <... mount resumed>) = 0
[pid 2214] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2213] <... futex resumed>) = 0
[pid 2214] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2213] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2214] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2213] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2214] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2214] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2213] <... futex resumed>) = 0
[pid 2214] <... futex resumed>) = 1
[pid 2213] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2214] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2213] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2213] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2213] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2213] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2215 attached
, parent_tid=[2215], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2215
[pid 2214] <... umount2 resumed>) = 0
[pid 2213] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2215] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2214] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2213] <... futex resumed>) = 0
[pid 2214] <... futex resumed>) = 0
[pid 2213] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2215] <... set_robust_list resumed>) = 0
[pid 2214] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2215] umount2("./file0", MNT_DETACH) = 0
[pid 2215] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2213] <... futex resumed>) = 0
[pid 2213] exit_group(0) = ?
[pid 2214] <... futex resumed>) = ?
[pid 2215] +++ exited with 0 +++
[pid 2214] +++ exited with 0 +++
[pid 2213] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2213, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2216
./strace-static-x86_64: Process 2216 attached
[pid 2216] set_robust_list(0x5555560865e0, 24) = 0
[pid 2216] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2216] setpgid(0, 0) = 0
[pid 2216] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2216] write(3, "1000", 4) = 4
[pid 2216] close(3) = 0
[pid 2216] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2216] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2216] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2216] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2217 attached
, parent_tid=[2217], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2217
[pid 2217] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2217] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2216] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2217] <... futex resumed>) = 0
[pid 2217] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2217] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2217] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2216] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2216] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2217] <... futex resumed>) = 0
[pid 2217] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2216] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2217] <... mount resumed>) = 0
[pid 2217] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2217] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2216] <... futex resumed>) = 0
[pid 2216] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2216] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2217] <... futex resumed>) = 0
[pid 2217] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2217] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2216] <... futex resumed>) = 0
[pid 2217] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2216] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2216] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2216] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2216] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2216] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2217] <... umount2 resumed>) = 0
[pid 2217] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2216] <... clone resumed>, parent_tid=[2218], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2218
[pid 2217] <... futex resumed>) = 0
[pid 2216] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2217] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2216] <... futex resumed>) = 0
[pid 2216] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2218 attached
<unfinished ...>
[pid 2218] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2218] umount2("./file0", MNT_DETACH) = 0
[pid 2218] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2216] <... futex resumed>) = 0
[pid 2218] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2216] exit_group(0 <unfinished ...>
[pid 2217] <... futex resumed>) = 231
[pid 2216] <... exit_group resumed>) = ?
[pid 2218] <... futex resumed>) = ?
[pid 2217] +++ exited with 0 +++
[pid 2218] +++ exited with 0 +++
[pid 2216] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2216, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2219 attached
, child_tidptr=0x5555560865d0) = 2219
[pid 2219] set_robust_list(0x5555560865e0, 24) = 0
[pid 2219] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2219] setpgid(0, 0) = 0
[pid 2219] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2219] write(3, "1000", 4) = 4
[pid 2219] close(3) = 0
[pid 2219] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2219] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2219] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2219] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2220], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2220
./strace-static-x86_64: Process 2220 attached
[pid 2220] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2220] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2219] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2220] <... futex resumed>) = 0
[pid 2220] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2220] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2220] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2219] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2219] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2220] <... futex resumed>) = 0
[pid 2219] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2220] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2220] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2220] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2219] <... futex resumed>) = 0
[pid 2219] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2220] <... futex resumed>) = 0
[pid 2219] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2220] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2220] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2219] <... futex resumed>) = 0
[pid 2220] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2219] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2219] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2220] <... umount2 resumed>) = 0
[pid 2220] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2220] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2219] <... futex resumed>) = 0
[pid 2219] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2219] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2219] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2221 attached
, parent_tid=[2221], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2221
[pid 2221] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2221] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2219] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2221] <... futex resumed>) = 0
[pid 2219] <... futex resumed>) = 1
[pid 2219] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2221] umount2("./file0", MNT_DETACH) = 0
[pid 2221] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2219] <... futex resumed>) = 0
[pid 2221] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2219] exit_group(0 <unfinished ...>
[pid 2221] <... futex resumed>) = ?
[pid 2220] <... futex resumed>) = ?
[pid 2219] <... exit_group resumed>) = ?
[pid 2220] +++ exited with 0 +++
[pid 2221] +++ exited with 0 +++
[pid 2219] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2219, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2222 attached
, child_tidptr=0x5555560865d0) = 2222
[pid 2222] set_robust_list(0x5555560865e0, 24) = 0
[pid 2222] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2222] setpgid(0, 0) = 0
[pid 2222] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2222] write(3, "1000", 4) = 4
[pid 2222] close(3) = 0
[pid 2222] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2222] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2222] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2222] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2223 attached
, parent_tid=[2223], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2223
[pid 2223] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2223] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2222] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2223] <... futex resumed>) = 0
[pid 2222] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2223] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2223] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2223] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2222] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2222] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2223] <... futex resumed>) = 0
[pid 2223] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2222] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2223] <... mount resumed>) = 0
[pid 2223] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2222] <... futex resumed>) = 0
[pid 2223] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2222] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2222] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2223] <... mount resumed>) = 0
[pid 2223] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2222] <... futex resumed>) = 0
[pid 2223] <... futex resumed>) = 1
[pid 2222] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2223] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2222] <... futex resumed>) = 0
[pid 2222] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2222] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2222] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2222] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2224], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2224
[pid 2223] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2224 attached
[pid 2223] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2222] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2224] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2223] <... futex resumed>) = 0
[pid 2222] <... futex resumed>) = 0
[pid 2224] <... set_robust_list resumed>) = 0
[pid 2223] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2222] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2224] umount2("./file0", MNT_DETACH) = 0
[pid 2224] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2222] <... futex resumed>) = 0
[pid 2224] <... futex resumed>) = 1
[pid 2222] exit_group(0 <unfinished ...>
[pid 2224] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2222] <... exit_group resumed>) = ?
[pid 2223] <... futex resumed>) = ?
[pid 2223] +++ exited with 0 +++
[pid 2224] <... futex resumed>) = ?
[pid 2224] +++ exited with 0 +++
[pid 2222] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2222, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2225
./strace-static-x86_64: Process 2225 attached
[pid 2225] set_robust_list(0x5555560865e0, 24) = 0
[pid 2225] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2225] setpgid(0, 0) = 0
[pid 2225] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2225] write(3, "1000", 4) = 4
[pid 2225] close(3) = 0
[pid 2225] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2225] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2225] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2225] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2226 attached
, parent_tid=[2226], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2226
[pid 2226] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2226] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2225] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2226] <... futex resumed>) = 0
[pid 2226] mkdir("./file0", 000 <unfinished ...>
[pid 2225] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2226] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2226] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2226] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2225] <... futex resumed>) = 0
[pid 2225] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2226] <... futex resumed>) = 0
[pid 2226] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2225] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2226] <... mount resumed>) = 0
[pid 2226] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2226] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2225] <... futex resumed>) = 0
[pid 2225] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2226] <... futex resumed>) = 0
[pid 2225] <... futex resumed>) = 1
[pid 2226] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2225] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2226] <... mount resumed>) = 0
[pid 2226] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2226] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2225] <... futex resumed>) = 0
[pid 2225] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2225] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2225] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2225] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2225] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2227 attached
, parent_tid=[2227], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2227
[pid 2227] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2225] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2227] <... set_robust_list resumed>) = 0
[pid 2225] <... futex resumed>) = 0
[pid 2227] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2225] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2227] <... umount2 resumed>) = 0
[pid 2226] <... futex resumed>) = 0
[pid 2226] umount2("./file0", MNT_DETACH) = 0
[pid 2227] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2226] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2226] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2227] <... futex resumed>) = 1
[pid 2225] <... futex resumed>) = 0
[pid 2225] exit_group(0) = ?
[pid 2226] <... futex resumed>) = ?
[pid 2226] +++ exited with 0 +++
[pid 2227] +++ exited with 0 +++
[pid 2225] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2225, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2228
./strace-static-x86_64: Process 2228 attached
[pid 2228] set_robust_list(0x5555560865e0, 24) = 0
[pid 2228] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2228] setpgid(0, 0) = 0
[pid 2228] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2228] write(3, "1000", 4) = 4
[pid 2228] close(3) = 0
[pid 2228] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2228] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2228] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2228] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2229 attached
, parent_tid=[2229], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2229
[pid 2229] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2229] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2228] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2229] <... futex resumed>) = 0
[pid 2229] mkdir("./file0", 000 <unfinished ...>
[pid 2228] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2229] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2229] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2228] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2229] <... futex resumed>) = 0
[pid 2228] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2229] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2228] <... futex resumed>) = 0
[pid 2228] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2229] <... mount resumed>) = 0
[pid 2229] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2228] <... futex resumed>) = 0
[pid 2228] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2228] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2229] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2229] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2228] <... futex resumed>) = 0
[pid 2228] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2228] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2228] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2228] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2229] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2228] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2229] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2230 attached
[pid 2229] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2228] <... clone resumed>, parent_tid=[2230], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2230
[pid 2228] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2228] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2229] <... futex resumed>) = 0
[pid 2230] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2229] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2230] umount2("./file0", MNT_DETACH) = 0
[pid 2230] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2228] <... futex resumed>) = 0
[pid 2228] exit_group(0 <unfinished ...>
[pid 2230] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2228] <... exit_group resumed>) = ?
[pid 2229] <... futex resumed>) = ?
[pid 2230] <... futex resumed>) = ?
[pid 2229] +++ exited with 0 +++
[pid 2230] +++ exited with 0 +++
[pid 2228] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2228, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2231
./strace-static-x86_64: Process 2231 attached
[pid 2231] set_robust_list(0x5555560865e0, 24) = 0
[pid 2231] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2231] setpgid(0, 0) = 0
[pid 2231] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2231] write(3, "1000", 4) = 4
[pid 2231] close(3) = 0
[pid 2231] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2231] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2231] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2231] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2232], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2232
./strace-static-x86_64: Process 2232 attached
[pid 2232] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2232] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2231] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2232] <... futex resumed>) = 0
[pid 2232] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2232] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2232] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2231] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2231] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2232] <... futex resumed>) = 0
[pid 2232] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2231] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2232] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2232] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2231] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2231] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2232] <... futex resumed>) = 0
[pid 2231] <... futex resumed>) = 1
[pid 2232] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2231] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2232] <... mount resumed>) = 0
[pid 2232] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2232] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2231] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2231] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2232] <... futex resumed>) = 0
[pid 2232] umount2("./file0", MNT_DETACH) = 0
[pid 2231] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2232] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2232] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2231] <... futex resumed>) = 0
[pid 2231] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2231] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2231] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2233 attached
, parent_tid=[2233], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2233
[pid 2233] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2233] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2231] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2231] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2233] <... futex resumed>) = 0
[pid 2233] umount2("./file0", MNT_DETACH) = 0
[pid 2233] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2231] <... futex resumed>) = 0
[pid 2233] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2231] exit_group(0 <unfinished ...>
[pid 2233] <... futex resumed>) = 231
[pid 2232] <... futex resumed>) = ?
[pid 2231] <... exit_group resumed>) = ?
[pid 2233] +++ exited with 0 +++
[pid 2232] +++ exited with 0 +++
[pid 2231] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2231, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2234
./strace-static-x86_64: Process 2234 attached
[pid 2234] set_robust_list(0x5555560865e0, 24) = 0
[pid 2234] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2234] setpgid(0, 0) = 0
[pid 2234] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2234] write(3, "1000", 4) = 4
[pid 2234] close(3) = 0
[pid 2234] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2234] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2234] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2234] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2235], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2235
[pid 2234] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2234] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2235 attached
<unfinished ...>
[pid 2235] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2235] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2235] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2234] <... futex resumed>) = 0
[pid 2234] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2234] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2235] <... futex resumed>) = 1
[pid 2235] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2235] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2234] <... futex resumed>) = 0
[pid 2234] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2234] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2235] <... futex resumed>) = 1
[pid 2235] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2235] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2234] <... futex resumed>) = 0
[pid 2235] <... futex resumed>) = 1
[pid 2234] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2235] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2234] <... futex resumed>) = 0
[pid 2234] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2235] <... umount2 resumed>) = 0
[pid 2234] <... futex resumed>) = 0
[pid 2234] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2234] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2235] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2234] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2236], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2236
./strace-static-x86_64: Process 2236 attached
[pid 2234] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2236] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2234] <... futex resumed>) = 0
[pid 2236] <... set_robust_list resumed>) = 0
[pid 2234] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2236] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2235] <... futex resumed>) = 0
[pid 2236] <... umount2 resumed>) = 0
[pid 2235] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2236] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2234] <... futex resumed>) = 0
[pid 2236] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2234] exit_group(0) = ?
[pid 2236] <... futex resumed>) = ?
[pid 2236] +++ exited with 0 +++
[pid 2235] <... futex resumed>) = ?
[pid 2235] +++ exited with 0 +++
[pid 2234] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2234, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2237
./strace-static-x86_64: Process 2237 attached
[pid 2237] set_robust_list(0x5555560865e0, 24) = 0
[pid 2237] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2237] setpgid(0, 0) = 0
[pid 2237] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2237] write(3, "1000", 4) = 4
[pid 2237] close(3) = 0
[pid 2237] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2237] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2237] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2237] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2238 attached
, parent_tid=[2238], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2238
[pid 2238] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2237] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2238] <... set_robust_list resumed>) = 0
[pid 2237] <... futex resumed>) = 0
[pid 2237] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2238] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2238] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2237] <... futex resumed>) = 0
[pid 2238] <... futex resumed>) = 1
[pid 2237] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2238] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2237] <... futex resumed>) = 0
[pid 2237] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2238] <... mount resumed>) = 0
[pid 2238] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2237] <... futex resumed>) = 0
[pid 2238] <... futex resumed>) = 1
[pid 2237] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2238] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2237] <... futex resumed>) = 0
[pid 2237] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2238] <... mount resumed>) = 0
[pid 2238] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2237] <... futex resumed>) = 0
[pid 2237] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2237] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2237] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2237] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2238] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2237] <... mprotect resumed>) = 0
[pid 2237] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2239 attached
, parent_tid=[2239], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2239
[pid 2239] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2237] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2237] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2239] <... set_robust_list resumed>) = 0
[pid 2239] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2238] <... umount2 resumed>) = 0
[pid 2238] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2239] <... umount2 resumed>) = 0
[pid 2239] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2237] <... futex resumed>) = 0
[pid 2238] <... futex resumed>) = 0
[pid 2239] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2238] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2237] exit_group(0 <unfinished ...>
[pid 2238] <... futex resumed>) = 231
[pid 2237] <... exit_group resumed>) = ?
[pid 2239] <... futex resumed>) = ?
[pid 2239] +++ exited with 0 +++
[pid 2238] +++ exited with 0 +++
[pid 2237] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2237, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2240
./strace-static-x86_64: Process 2240 attached
[pid 2240] set_robust_list(0x5555560865e0, 24) = 0
[pid 2240] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2240] setpgid(0, 0) = 0
[pid 2240] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2240] write(3, "1000", 4) = 4
[pid 2240] close(3) = 0
[pid 2240] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2240] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2240] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2240] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2241 attached
, parent_tid=[2241], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2241
[pid 2241] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2241] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2240] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2241] <... futex resumed>) = 0
[pid 2240] <... futex resumed>) = 1
[pid 2240] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2241] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2241] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2241] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2240] <... futex resumed>) = 0
[pid 2240] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2241] <... futex resumed>) = 0
[pid 2240] <... futex resumed>) = 1
[pid 2241] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2240] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2241] <... mount resumed>) = 0
[pid 2241] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2241] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2240] <... futex resumed>) = 0
[pid 2241] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2240] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2241] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2240] <... futex resumed>) = 0
[pid 2240] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2241] <... mount resumed>) = 0
[pid 2241] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2240] <... futex resumed>) = 0
[pid 2240] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2241] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2240] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2240] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2240] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2240] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2241] <... umount2 resumed>) = 0
[pid 2241] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2240] <... clone resumed>, parent_tid=[2242], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2242
[pid 2241] <... futex resumed>) = 0
[pid 2240] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2242 attached
) = 0
[pid 2240] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2241] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2242] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2242] umount2("./file0", MNT_DETACH) = 0
[pid 2242] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2240] <... futex resumed>) = 0
[pid 2240] exit_group(0) = ?
[pid 2241] <... futex resumed>) = ?
[pid 2241] +++ exited with 0 +++
[pid 2242] +++ exited with 0 +++
[pid 2240] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2240, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2243 attached
, child_tidptr=0x5555560865d0) = 2243
[pid 2243] set_robust_list(0x5555560865e0, 24) = 0
[pid 2243] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2243] setpgid(0, 0) = 0
[pid 2243] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2243] write(3, "1000", 4) = 4
[pid 2243] close(3) = 0
[pid 2243] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2243] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2243] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2243] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2244], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2244
./strace-static-x86_64: Process 2244 attached
[pid 2244] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2244] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2243] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2244] <... futex resumed>) = 0
[pid 2244] mkdir("./file0", 000 <unfinished ...>
[pid 2243] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2244] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2244] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2244] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2243] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2243] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2244] <... futex resumed>) = 0
[pid 2244] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2243] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2244] <... mount resumed>) = 0
[pid 2244] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2243] <... futex resumed>) = 0
[pid 2243] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2243] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2244] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2244] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2243] <... futex resumed>) = 0
[pid 2243] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2243] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2243] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2243] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2243] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2245], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2245
[pid 2243] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2243] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2245 attached
<unfinished ...>
[pid 2245] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2245] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2244] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2245] <... umount2 resumed>) = 0
[pid 2245] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2243] <... futex resumed>) = 0
[pid 2245] <... futex resumed>) = 1
[pid 2245] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2244] <... umount2 resumed>) = 0
[pid 2244] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2244] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2243] exit_group(0) = ?
[pid 2244] <... futex resumed>) = ? <unavailable>
[pid 2245] <... futex resumed>) = ?
[pid 2245] +++ exited with 0 +++
[pid 2244] +++ exited with 0 +++
[pid 2243] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2243, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2246
./strace-static-x86_64: Process 2246 attached
[pid 2246] set_robust_list(0x5555560865e0, 24) = 0
[pid 2246] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2246] setpgid(0, 0) = 0
[pid 2246] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2246] write(3, "1000", 4) = 4
[pid 2246] close(3) = 0
[pid 2246] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2246] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2246] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2246] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2247 attached
<unfinished ...>
[pid 2247] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2246] <... clone resumed>, parent_tid=[2247], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2247
[pid 2247] <... set_robust_list resumed>) = 0
[pid 2246] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2246] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2247] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2247] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2246] <... futex resumed>) = 0
[pid 2247] <... futex resumed>) = 1
[pid 2246] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2247] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2246] <... futex resumed>) = 0
[pid 2246] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2247] <... mount resumed>) = 0
[pid 2247] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2246] <... futex resumed>) = 0
[pid 2247] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2246] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2247] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2246] <... futex resumed>) = 0
[pid 2247] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2246] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2247] <... mount resumed>) = 0
[pid 2247] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2246] <... futex resumed>) = 0
[pid 2247] <... futex resumed>) = 1
[pid 2246] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2247] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2246] <... futex resumed>) = 0
[pid 2246] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2246] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2246] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2247] <... umount2 resumed>) = 0
[pid 2246] <... mprotect resumed>) = 0
[pid 2247] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2246] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2247] <... futex resumed>) = 0
[pid 2247] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2246] <... clone resumed>, parent_tid=[2248], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2248
./strace-static-x86_64: Process 2248 attached
[pid 2246] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2248] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2246] <... futex resumed>) = 0
[pid 2248] <... set_robust_list resumed>) = 0
[pid 2246] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2248] umount2("./file0", MNT_DETACH) = 0
[pid 2248] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2246] <... futex resumed>) = 0
[pid 2248] <... futex resumed>) = 1
[pid 2246] exit_group(0 <unfinished ...>
[pid 2248] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2246] <... exit_group resumed>) = ?
[pid 2247] <... futex resumed>) = ?
[pid 2247] +++ exited with 0 +++
[pid 2248] <... futex resumed>) = ?
[pid 2248] +++ exited with 0 +++
[pid 2246] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2246, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2249
./strace-static-x86_64: Process 2249 attached
[pid 2249] set_robust_list(0x5555560865e0, 24) = 0
[pid 2249] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2249] setpgid(0, 0) = 0
[pid 2249] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2249] write(3, "1000", 4) = 4
[pid 2249] close(3) = 0
[pid 2249] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2249] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2249] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2249] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2250 attached
<unfinished ...>
[pid 2250] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2250] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2249] <... clone resumed>, parent_tid=[2250], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2250
[pid 2249] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2250] <... futex resumed>) = 0
[pid 2250] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2250] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2250] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2249] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2249] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2250] <... futex resumed>) = 0
[pid 2250] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2249] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2250] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2250] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2249] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2249] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2250] <... futex resumed>) = 0
[pid 2250] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2249] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2250] <... mount resumed>) = 0
[pid 2250] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2250] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2249] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2249] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2250] <... futex resumed>) = 0
[pid 2250] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2249] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2250] <... umount2 resumed>) = 0
[pid 2249] <... futex resumed>) = 0
[pid 2250] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2250] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2249] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2249] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2249] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2251 attached
, parent_tid=[2251], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2251
[pid 2251] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2251] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2249] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2251] <... futex resumed>) = 0
[pid 2251] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2249] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2251] <... umount2 resumed>) = 0
[pid 2251] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2251] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2249] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2249] exit_group(0 <unfinished ...>
[pid 2250] <... futex resumed>) = ?
[pid 2249] <... exit_group resumed>) = ?
[pid 2250] +++ exited with 0 +++
[pid 2251] <... futex resumed>) = ?
[pid 2251] +++ exited with 0 +++
[pid 2249] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2249, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2252
./strace-static-x86_64: Process 2252 attached
[pid 2252] set_robust_list(0x5555560865e0, 24) = 0
[pid 2252] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2252] setpgid(0, 0) = 0
[pid 2252] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2252] write(3, "1000", 4) = 4
[pid 2252] close(3) = 0
[pid 2252] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2252] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2252] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2252] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2253], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2253
[pid 2252] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2252] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2253 attached
<unfinished ...>
[pid 2253] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2253] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2253] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2252] <... futex resumed>) = 0
[pid 2252] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2252] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2253] <... futex resumed>) = 1
[pid 2253] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2253] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2252] <... futex resumed>) = 0
[pid 2252] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2252] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2253] <... futex resumed>) = 1
[pid 2253] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2253] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2252] <... futex resumed>) = 0
[pid 2253] <... futex resumed>) = 1
[pid 2252] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2253] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2252] <... futex resumed>) = 0
[pid 2252] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2252] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2252] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2253] <... umount2 resumed>) = 0
[pid 2252] <... mprotect resumed>) = 0
[pid 2252] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2253] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2254 attached
) = 0
[pid 2252] <... clone resumed>, parent_tid=[2254], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2254
[pid 2254] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2253] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2254] <... set_robust_list resumed>) = 0
[pid 2252] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2254] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2252] <... futex resumed>) = 0
[pid 2252] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2254] <... umount2 resumed>) = 0
[pid 2254] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2252] <... futex resumed>) = 0
[pid 2254] <... futex resumed>) = 1
[pid 2252] exit_group(0 <unfinished ...>
[pid 2254] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2252] <... exit_group resumed>) = ?
[pid 2254] <... futex resumed>) = ?
[pid 2253] <... futex resumed>) = ?
[pid 2253] +++ exited with 0 +++
[pid 2254] +++ exited with 0 +++
[pid 2252] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2252, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2255
./strace-static-x86_64: Process 2255 attached
[pid 2255] set_robust_list(0x5555560865e0, 24) = 0
[pid 2255] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2255] setpgid(0, 0) = 0
[pid 2255] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2255] write(3, "1000", 4) = 4
[pid 2255] close(3) = 0
[pid 2255] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2255] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2255] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2255] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2256 attached
<unfinished ...>
[pid 2256] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2256] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2255] <... clone resumed>, parent_tid=[2256], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2256
[pid 2255] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2256] <... futex resumed>) = 0
[pid 2256] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2256] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2256] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2255] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2255] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2256] <... futex resumed>) = 0
[pid 2256] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2255] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2256] <... mount resumed>) = 0
[pid 2256] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2256] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2255] <... futex resumed>) = 0
[pid 2255] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2256] <... futex resumed>) = 0
[pid 2256] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2255] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2256] <... mount resumed>) = 0
[pid 2256] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2256] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2255] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2255] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2256] <... futex resumed>) = 0
[pid 2256] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2255] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2256] <... umount2 resumed>) = 0
[pid 2256] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2256] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2255] <... futex resumed>) = 0
[pid 2255] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2255] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2255] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2257 attached
<unfinished ...>
[pid 2257] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2257] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2255] <... clone resumed>, parent_tid=[2257], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2257
[pid 2255] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2257] <... futex resumed>) = 0
[pid 2257] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2255] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2257] <... umount2 resumed>) = 0
[pid 2257] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2257] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2255] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2255] exit_group(0 <unfinished ...>
[pid 2256] <... futex resumed>) = ?
[pid 2255] <... exit_group resumed>) = ?
[pid 2256] +++ exited with 0 +++
[pid 2257] <... futex resumed>) = ?
[pid 2257] +++ exited with 0 +++
[pid 2255] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2255, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2258
./strace-static-x86_64: Process 2258 attached
[pid 2258] set_robust_list(0x5555560865e0, 24) = 0
[pid 2258] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2258] setpgid(0, 0) = 0
[pid 2258] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2258] write(3, "1000", 4) = 4
[pid 2258] close(3) = 0
[pid 2258] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2258] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2258] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2258] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2259], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2259
[pid 2258] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2258] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2259 attached
<unfinished ...>
[pid 2259] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2259] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2259] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2258] <... futex resumed>) = 0
[pid 2258] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2258] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2259] <... futex resumed>) = 1
[pid 2259] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2259] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2258] <... futex resumed>) = 0
[pid 2259] <... futex resumed>) = 1
[pid 2258] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2259] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2258] <... futex resumed>) = 0
[pid 2258] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2259] <... mount resumed>) = 0
[pid 2259] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2258] <... futex resumed>) = 0
[pid 2259] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2258] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2259] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2258] <... futex resumed>) = 0
[pid 2259] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2258] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2258] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2258] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2258] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2259] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2260 attached
[pid 2258] <... clone resumed>, parent_tid=[2260], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2260
[pid 2259] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2260] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2259] <... futex resumed>) = 0
[pid 2258] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2260] <... set_robust_list resumed>) = 0
[pid 2259] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2258] <... futex resumed>) = 0
[pid 2260] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2258] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2260] <... umount2 resumed>) = 0
[pid 2260] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2258] <... futex resumed>) = 0
[pid 2258] exit_group(0) = ?
[pid 2259] <... futex resumed>) = ?
[pid 2260] +++ exited with 0 +++
[pid 2259] +++ exited with 0 +++
[pid 2258] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2258, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2261
./strace-static-x86_64: Process 2261 attached
[pid 2261] set_robust_list(0x5555560865e0, 24) = 0
[pid 2261] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2261] setpgid(0, 0) = 0
[pid 2261] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2261] write(3, "1000", 4) = 4
[pid 2261] close(3) = 0
[pid 2261] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2261] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2261] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2261] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2262], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2262
[pid 2261] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2261] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2262 attached
<unfinished ...>
[pid 2262] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2262] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2262] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2261] <... futex resumed>) = 0
[pid 2261] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2261] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2262] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2262] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2261] <... futex resumed>) = 0
[pid 2261] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2261] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2262] <... futex resumed>) = 1
[pid 2262] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2262] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2261] <... futex resumed>) = 0
[pid 2261] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2261] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2261] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2261] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2261] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2263], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2263
[pid 2261] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2261] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2263 attached
<unfinished ...>
[pid 2262] umount2("./file0", MNT_DETACH) = 0
[pid 2263] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2262] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2263] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2262] <... futex resumed>) = 0
[pid 2262] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2263] <... umount2 resumed>) = 0
[pid 2263] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2261] <... futex resumed>) = 0
[pid 2263] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2261] exit_group(0 <unfinished ...>
[pid 2263] <... futex resumed>) = ?
[pid 2262] <... futex resumed>) = ?
[pid 2261] <... exit_group resumed>) = ?
[pid 2262] +++ exited with 0 +++
[pid 2263] +++ exited with 0 +++
[pid 2261] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2261, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2264
./strace-static-x86_64: Process 2264 attached
[pid 2264] set_robust_list(0x5555560865e0, 24) = 0
[pid 2264] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2264] setpgid(0, 0) = 0
[pid 2264] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2264] write(3, "1000", 4) = 4
[pid 2264] close(3) = 0
[pid 2264] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2264] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2264] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2264] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2265 attached
, parent_tid=[2265], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2265
[pid 2265] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2265] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2264] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2265] <... futex resumed>) = 0
[pid 2265] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2265] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2265] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2264] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2264] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2265] <... futex resumed>) = 0
[pid 2265] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2264] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2265] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2265] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2264] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2264] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2265] <... futex resumed>) = 0
[pid 2265] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2264] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2265] <... mount resumed>) = 0
[pid 2265] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2265] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2264] <... futex resumed>) = 0
[pid 2264] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2265] <... futex resumed>) = 0
[pid 2265] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2264] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2265] <... umount2 resumed>) = 0
[pid 2265] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2265] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2264] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2264] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2264] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2266 attached
<unfinished ...>
[pid 2266] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2266] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2264] <... clone resumed>, parent_tid=[2266], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2266
[pid 2264] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2266] <... futex resumed>) = 0
[pid 2266] umount2("./file0", MNT_DETACH) = 0
[pid 2264] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2266] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2266] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2264] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2264] exit_group(0 <unfinished ...>
[pid 2266] <... futex resumed>) = ?
[pid 2265] <... futex resumed>) = ?
[pid 2264] <... exit_group resumed>) = ?
[pid 2265] +++ exited with 0 +++
[pid 2266] +++ exited with 0 +++
[pid 2264] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2264, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2267
./strace-static-x86_64: Process 2267 attached
[pid 2267] set_robust_list(0x5555560865e0, 24) = 0
[pid 2267] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2267] setpgid(0, 0) = 0
[pid 2267] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2267] write(3, "1000", 4) = 4
[pid 2267] close(3) = 0
[pid 2267] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2267] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2267] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2267] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2268], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2268
./strace-static-x86_64: Process 2268 attached
[pid 2267] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2267] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2268] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2268] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2268] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2267] <... futex resumed>) = 0
[pid 2267] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2267] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2268] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2268] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2267] <... futex resumed>) = 0
[pid 2267] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2267] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2268] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2268] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2267] <... futex resumed>) = 0
[pid 2267] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2267] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2267] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2267] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2267] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2268] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2267] <... clone resumed>, parent_tid=[2269], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2269
[pid 2267] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2267] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2269 attached
<unfinished ...>
[pid 2269] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2269] umount2("./file0", MNT_DETACH) = 0
[pid 2269] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2267] <... futex resumed>) = 0
[pid 2269] <... futex resumed>) = 1
[pid 2269] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2268] <... umount2 resumed>) = 0
[pid 2268] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2267] exit_group(0) = ?
[pid 2269] <... futex resumed>) = ?
[pid 2269] +++ exited with 0 +++
[pid 2268] +++ exited with 0 +++
[pid 2267] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2267, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2270
./strace-static-x86_64: Process 2270 attached
[pid 2270] set_robust_list(0x5555560865e0, 24) = 0
[pid 2270] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2270] setpgid(0, 0) = 0
[pid 2270] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2270] write(3, "1000", 4) = 4
[pid 2270] close(3) = 0
[pid 2270] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2270] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2270] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2270] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2271 attached
, parent_tid=[2271], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2271
[pid 2271] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2271] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2270] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2271] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2270] <... futex resumed>) = 0
[pid 2271] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2271] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2271] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2270] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2270] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2271] <... futex resumed>) = 0
[pid 2271] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2270] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2271] <... mount resumed>) = 0
[pid 2271] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2271] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2270] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2270] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2271] <... futex resumed>) = 0
[pid 2270] <... futex resumed>) = 1
[pid 2271] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2270] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2271] <... mount resumed>) = 0
[pid 2271] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2271] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2270] <... futex resumed>) = 0
[pid 2270] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2271] <... futex resumed>) = 0
[pid 2270] <... futex resumed>) = 1
[pid 2271] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2270] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2270] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2271] <... umount2 resumed>) = 0
[pid 2270] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2271] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2270] <... mprotect resumed>) = 0
[pid 2271] <... futex resumed>) = 0
[pid 2270] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2271] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2272 attached
<unfinished ...>
[pid 2270] <... clone resumed>, parent_tid=[2272], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2272
[pid 2272] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2270] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2272] <... set_robust_list resumed>) = 0
[pid 2270] <... futex resumed>) = 0
[pid 2272] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2270] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2272] <... umount2 resumed>) = 0
[pid 2272] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2270] <... futex resumed>) = 0
[pid 2272] <... futex resumed>) = 1
[pid 2270] exit_group(0 <unfinished ...>
[pid 2272] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2270] <... exit_group resumed>) = ?
[pid 2271] <... futex resumed>) = -1 (errno 18446744073709551414)
[pid 2272] <... futex resumed>) = ?
[pid 2271] +++ exited with 0 +++
[pid 2272] +++ exited with 0 +++
[pid 2270] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2270, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2273
./strace-static-x86_64: Process 2273 attached
[pid 2273] set_robust_list(0x5555560865e0, 24) = 0
[pid 2273] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2273] setpgid(0, 0) = 0
[pid 2273] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2273] write(3, "1000", 4) = 4
[pid 2273] close(3) = 0
[pid 2273] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2273] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2273] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2273] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2274 attached
, parent_tid=[2274], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2274
[pid 2274] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2273] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2274] <... set_robust_list resumed>) = 0
[pid 2273] <... futex resumed>) = 0
[pid 2273] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2274] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2274] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2273] <... futex resumed>) = 0
[pid 2274] <... futex resumed>) = 1
[pid 2273] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2274] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2273] <... futex resumed>) = 0
[pid 2273] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2274] <... mount resumed>) = 0
[pid 2274] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2273] <... futex resumed>) = 0
[pid 2273] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2274] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2273] <... futex resumed>) = 0
[pid 2273] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2274] <... mount resumed>) = 0
[pid 2274] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2273] <... futex resumed>) = 0
[pid 2273] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2274] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2273] <... futex resumed>) = 0
[pid 2273] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2273] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2273] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2273] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2275 attached
, parent_tid=[2275], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2275
[pid 2274] <... umount2 resumed>) = 0
[pid 2273] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2275] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2274] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2273] <... futex resumed>) = 0
[pid 2274] <... futex resumed>) = 0
[pid 2273] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2274] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2275] <... set_robust_list resumed>) = 0
[pid 2275] umount2("./file0", MNT_DETACH) = 0
[pid 2275] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2273] <... futex resumed>) = 0
[pid 2275] <... futex resumed>) = 1
[pid 2275] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2273] exit_group(0) = ?
[pid 2275] <... futex resumed>) = 231
[pid 2275] +++ exited with 0 +++
[pid 2274] <... futex resumed>) = ?
[pid 2274] +++ exited with 0 +++
[pid 2273] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2273, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2276
./strace-static-x86_64: Process 2276 attached
[pid 2276] set_robust_list(0x5555560865e0, 24) = 0
[pid 2276] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2276] setpgid(0, 0) = 0
[pid 2276] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2276] write(3, "1000", 4) = 4
[pid 2276] close(3) = 0
[pid 2276] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2276] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2276] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2276] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2277 attached
, parent_tid=[2277], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2277
[pid 2276] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2276] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2277] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2277] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2277] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2276] <... futex resumed>) = 0
[pid 2276] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2277] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2276] <... futex resumed>) = 0
[pid 2276] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2277] <... mount resumed>) = 0
[pid 2277] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2276] <... futex resumed>) = 0
[pid 2276] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2276] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2277] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2277] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2276] <... futex resumed>) = 0
[pid 2277] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2276] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2276] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2276] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2276] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2276] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2277] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
./strace-static-x86_64: Process 2278 attached
[pid 2277] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2276] <... clone resumed>, parent_tid=[2278], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2278
[pid 2276] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2276] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2278] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2277] <... umount2 resumed>) = 0
[pid 2277] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2277] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2278] <... set_robust_list resumed>) = 0
[pid 2278] umount2("./file0", MNT_DETACH) = 0
[pid 2278] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2276] <... futex resumed>) = 0
[pid 2276] exit_group(0 <unfinished ...>
[pid 2278] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL) = ?
[pid 2277] <... futex resumed>) = ?
[pid 2277] +++ exited with 0 +++
[pid 2278] +++ exited with 0 +++
[pid 2276] <... exit_group resumed>) = ?
[pid 2276] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2276, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2279
./strace-static-x86_64: Process 2279 attached
[pid 2279] set_robust_list(0x5555560865e0, 24) = 0
[pid 2279] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2279] setpgid(0, 0) = 0
[pid 2279] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2279] write(3, "1000", 4) = 4
[pid 2279] close(3) = 0
[pid 2279] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2279] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2279] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2279] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2280 attached
<unfinished ...>
[pid 2280] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2280] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2279] <... clone resumed>, parent_tid=[2280], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2280
[pid 2279] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2280] <... futex resumed>) = 0
[pid 2280] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2279] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2280] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2280] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2279] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2279] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2280] <... futex resumed>) = 0
[pid 2279] <... futex resumed>) = 1
[pid 2280] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2279] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2280] <... mount resumed>) = 0
[pid 2280] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2280] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2279] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2279] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2280] <... futex resumed>) = 0
[pid 2280] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2279] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2280] <... mount resumed>) = 0
[pid 2280] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2280] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2279] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2279] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2280] <... futex resumed>) = 0
[pid 2280] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2279] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2280] <... umount2 resumed>) = 0
[pid 2280] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2280] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2279] <... futex resumed>) = 0
[pid 2279] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2279] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2279] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2281 attached
<unfinished ...>
[pid 2281] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2281] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2279] <... clone resumed>, parent_tid=[2281], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2281
[pid 2279] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2281] <... futex resumed>) = 0
[pid 2279] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2281] umount2("./file0", MNT_DETACH) = 0
[pid 2281] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2281] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2279] <... futex resumed>) = 0
[pid 2279] exit_group(0 <unfinished ...>
[pid 2280] <... futex resumed>) = ?
[pid 2281] <... futex resumed>) = ?
[pid 2279] <... exit_group resumed>) = ?
[pid 2280] +++ exited with 0 +++
[pid 2281] +++ exited with 0 +++
[pid 2279] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2279, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2282 attached
, child_tidptr=0x5555560865d0) = 2282
[pid 2282] set_robust_list(0x5555560865e0, 24) = 0
[pid 2282] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2282] setpgid(0, 0) = 0
[pid 2282] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2282] write(3, "1000", 4) = 4
[pid 2282] close(3) = 0
[pid 2282] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2282] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2282] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2282] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2283], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2283
./strace-static-x86_64: Process 2283 attached
[pid 2283] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2283] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2282] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2283] <... futex resumed>) = 0
[pid 2283] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2283] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2283] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2282] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2282] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2283] <... futex resumed>) = 0
[pid 2283] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2282] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2283] <... mount resumed>) = 0
[pid 2283] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2283] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2282] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2282] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2283] <... futex resumed>) = 0
[pid 2283] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2283] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2283] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2282] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2282] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2283] <... futex resumed>) = 0
[pid 2283] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2282] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2282] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2283] <... umount2 resumed>) = 0
[pid 2283] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2283] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2282] <... mmap resumed>) = 0x7f236e446000
[pid 2282] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2282] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2284 attached
, parent_tid=[2284], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2284
[pid 2284] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2284] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2282] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2284] <... futex resumed>) = 0
[pid 2284] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2282] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2284] <... umount2 resumed>) = 0
[pid 2284] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2284] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2282] <... futex resumed>) = 0
[pid 2282] exit_group(0 <unfinished ...>
[pid 2283] <... futex resumed>) = ?
[pid 2282] <... exit_group resumed>) = ?
[pid 2283] +++ exited with 0 +++
[pid 2284] <... futex resumed>) = ?
[pid 2284] +++ exited with 0 +++
[pid 2282] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2282, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2285
./strace-static-x86_64: Process 2285 attached
[pid 2285] set_robust_list(0x5555560865e0, 24) = 0
[pid 2285] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2285] setpgid(0, 0) = 0
[pid 2285] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2285] write(3, "1000", 4) = 4
[pid 2285] close(3) = 0
[pid 2285] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2285] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2285] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2285] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2286 attached
, parent_tid=[2286], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2286
[pid 2286] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2286] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2285] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2286] <... futex resumed>) = 0
[pid 2286] mkdir("./file0", 000 <unfinished ...>
[pid 2285] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2286] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2286] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2285] <... futex resumed>) = 0
[pid 2285] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2285] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2286] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2286] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2285] <... futex resumed>) = 0
[pid 2285] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2285] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2286] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2286] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2285] <... futex resumed>) = 0
[pid 2286] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2285] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2285] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2286] <... umount2 resumed>) = 0
[pid 2285] <... futex resumed>) = 0
[pid 2286] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2285] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2286] <... futex resumed>) = 0
[pid 2285] <... mmap resumed>) = 0x7f236e446000
[pid 2286] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2285] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2285] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2287 attached
, parent_tid=[2287], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2287
[pid 2285] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2285] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2287] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2287] umount2("./file0", MNT_DETACH) = 0
[pid 2287] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2285] <... futex resumed>) = 0
[pid 2285] exit_group(0) = ?
[pid 2286] <... futex resumed>) = ?
[pid 2286] +++ exited with 0 +++
[pid 2287] +++ exited with 0 +++
[pid 2285] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2285, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2288
./strace-static-x86_64: Process 2288 attached
[pid 2288] set_robust_list(0x5555560865e0, 24) = 0
[pid 2288] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2288] setpgid(0, 0) = 0
[pid 2288] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2288] write(3, "1000", 4) = 4
[pid 2288] close(3) = 0
[pid 2288] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2288] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2288] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2288] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2289], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2289
[pid 2288] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2288] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2289 attached
<unfinished ...>
[pid 2289] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2289] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2289] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2288] <... futex resumed>) = 0
[pid 2288] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2288] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2289] <... futex resumed>) = 1
[pid 2289] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2289] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2288] <... futex resumed>) = 0
[pid 2288] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2288] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2289] <... futex resumed>) = 1
[pid 2289] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2289] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2288] <... futex resumed>) = 0
[pid 2288] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2288] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2288] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2288] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2288] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2290 attached
, parent_tid=[2290], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2290
[pid 2288] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2288] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2289] <... futex resumed>) = 1
[pid 2289] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2290] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2289] <... umount2 resumed>) = 0
[pid 2289] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2290] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2289] <... futex resumed>) = 0
[pid 2289] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2290] <... umount2 resumed>) = 0
[pid 2290] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2288] <... futex resumed>) = 0
[pid 2288] exit_group(0) = ?
[pid 2290] +++ exited with 0 +++
[pid 2289] <... futex resumed>) = ?
[pid 2289] +++ exited with 0 +++
[pid 2288] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2288, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2291
./strace-static-x86_64: Process 2291 attached
[pid 2291] set_robust_list(0x5555560865e0, 24) = 0
[pid 2291] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2291] setpgid(0, 0) = 0
[pid 2291] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2291] write(3, "1000", 4) = 4
[pid 2291] close(3) = 0
[pid 2291] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2291] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2291] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2291] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2292 attached
, parent_tid=[2292], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2292
[pid 2292] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2292] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2291] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2292] <... futex resumed>) = 0
[pid 2291] <... futex resumed>) = 1
[pid 2292] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2292] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2292] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2291] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2291] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2292] <... futex resumed>) = 0
[pid 2292] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2291] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2292] <... mount resumed>) = 0
[pid 2292] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2292] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2291] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2291] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2292] <... futex resumed>) = 0
[pid 2291] <... futex resumed>) = 1
[pid 2292] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2291] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2292] <... mount resumed>) = 0
[pid 2292] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2292] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2291] <... futex resumed>) = 0
[pid 2291] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2292] <... futex resumed>) = 0
[pid 2292] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2291] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2291] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2292] <... umount2 resumed>) = 0
[pid 2292] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2291] <... mmap resumed>) = 0x7f236e446000
[pid 2292] <... futex resumed>) = 0
[pid 2292] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2291] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2291] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2293 attached
<unfinished ...>
[pid 2293] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2291] <... clone resumed>, parent_tid=[2293], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2293
[pid 2293] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2291] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2293] <... futex resumed>) = 0
[pid 2293] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2291] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2293] <... umount2 resumed>) = 0
[pid 2293] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2293] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2291] <... futex resumed>) = 0
[pid 2291] exit_group(0) = ?
[pid 2293] <... futex resumed>) = 231
[pid 2292] <... futex resumed>) = ?
[pid 2293] +++ exited with 0 +++
[pid 2292] +++ exited with 0 +++
[pid 2291] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2291, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2294
./strace-static-x86_64: Process 2294 attached
[pid 2294] set_robust_list(0x5555560865e0, 24) = 0
[pid 2294] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2294] setpgid(0, 0) = 0
[pid 2294] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2294] write(3, "1000", 4) = 4
[pid 2294] close(3) = 0
[pid 2294] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2294] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2294] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2294] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2295], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2295
./strace-static-x86_64: Process 2295 attached
[pid 2295] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2295] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2294] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2295] <... futex resumed>) = 0
[pid 2294] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2295] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2295] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2295] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2294] <... futex resumed>) = 0
[pid 2294] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2295] <... futex resumed>) = 0
[pid 2295] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2294] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2295] <... mount resumed>) = 0
[pid 2295] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2294] <... futex resumed>) = 0
[pid 2294] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2294] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2295] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2295] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2294] <... futex resumed>) = 0
[pid 2294] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2294] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2294] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2294] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2295] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2294] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2296], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2296
[pid 2294] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2294] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2296 attached
<unfinished ...>
[pid 2296] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2296] umount2("./file0", MNT_DETACH) = 0
[pid 2296] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2294] <... futex resumed>) = 0
[pid 2296] <... futex resumed>) = 1
[pid 2296] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2295] <... umount2 resumed>) = 0
[pid 2295] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2295] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2294] exit_group(0) = ?
[pid 2296] <... futex resumed>) = ?
[pid 2295] <... futex resumed>) = ?
[pid 2296] +++ exited with 0 +++
[pid 2295] +++ exited with 0 +++
[pid 2294] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2294, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2297
./strace-static-x86_64: Process 2297 attached
[pid 2297] set_robust_list(0x5555560865e0, 24) = 0
[pid 2297] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2297] setpgid(0, 0) = 0
[pid 2297] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2297] write(3, "1000", 4) = 4
[pid 2297] close(3) = 0
[pid 2297] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2297] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2297] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2297] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2298], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2298
[pid 2297] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2297] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2298 attached
<unfinished ...>
[pid 2298] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2298] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2298] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2297] <... futex resumed>) = 0
[pid 2297] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2297] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2298] <... futex resumed>) = 1
[pid 2298] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2298] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2297] <... futex resumed>) = 0
[pid 2297] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2297] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2298] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2298] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2297] <... futex resumed>) = 0
[pid 2298] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2297] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2297] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2297] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2297] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2298] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2298] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2297] <... mprotect resumed>) = 0
[pid 2297] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2298] <... umount2 resumed>) = 0
[pid 2297] <... clone resumed>, parent_tid=[2299], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2299
[pid 2297] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2297] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2299 attached
<unfinished ...>
[pid 2299] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2298] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2299] <... set_robust_list resumed>) = 0
[pid 2299] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2298] <... futex resumed>) = 0
[pid 2299] <... umount2 resumed>) = 0
[pid 2298] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2299] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2297] <... futex resumed>) = 0
[pid 2297] exit_group(0) = ?
[pid 2298] <... futex resumed>) = ?
[pid 2299] <... futex resumed>) = ?
[pid 2298] +++ exited with 0 +++
[pid 2299] +++ exited with 0 +++
[pid 2297] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2297, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2300
./strace-static-x86_64: Process 2300 attached
[pid 2300] set_robust_list(0x5555560865e0, 24) = 0
[pid 2300] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2300] setpgid(0, 0) = 0
[pid 2300] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2300] write(3, "1000", 4) = 4
[pid 2300] close(3) = 0
[pid 2300] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2300] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2300] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2300] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2301 attached
, parent_tid=[2301], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2301
[pid 2301] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2301] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2300] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2301] <... futex resumed>) = 0
[pid 2301] mkdir("./file0", 000 <unfinished ...>
[pid 2300] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2301] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2301] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2301] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2300] <... futex resumed>) = 0
[pid 2300] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2301] <... futex resumed>) = 0
[pid 2300] <... futex resumed>) = 1
[pid 2301] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2300] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2301] <... mount resumed>) = 0
[pid 2301] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2300] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2300] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2301] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2300] <... futex resumed>) = 0
[pid 2300] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2301] <... mount resumed>) = 0
[pid 2301] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2300] <... futex resumed>) = 0
[pid 2301] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2300] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2301] <... futex resumed>) = 0
[pid 2300] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2301] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2300] <... futex resumed>) = 0
[pid 2300] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2301] <... umount2 resumed>) = 0
[pid 2300] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2301] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2300] <... mprotect resumed>) = 0
[pid 2301] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2300] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2302 attached
, parent_tid=[2302], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2302
[pid 2302] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2300] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2302] <... set_robust_list resumed>) = 0
[pid 2300] <... futex resumed>) = 0
[pid 2302] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2300] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2302] <... umount2 resumed>) = 0
[pid 2302] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2300] <... futex resumed>) = 0
[pid 2302] <... futex resumed>) = 1
[pid 2300] exit_group(0 <unfinished ...>
[pid 2302] ????( <unfinished ...>
[pid 2300] <... exit_group resumed>) = ?
[pid 2302] <... ???? resumed>) = ?
[pid 2301] <... futex resumed>) = ?
[pid 2302] +++ exited with 0 +++
[pid 2301] +++ exited with 0 +++
[pid 2300] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2300, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2303
./strace-static-x86_64: Process 2303 attached
[pid 2303] set_robust_list(0x5555560865e0, 24) = 0
[pid 2303] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2303] setpgid(0, 0) = 0
[pid 2303] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2303] write(3, "1000", 4) = 4
[pid 2303] close(3) = 0
[pid 2303] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2303] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2303] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2303] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2304], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2304
[pid 2303] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2303] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2304 attached
<unfinished ...>
[pid 2304] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2304] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2304] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2303] <... futex resumed>) = 0
[pid 2303] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2303] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2304] <... futex resumed>) = 1
[pid 2304] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2304] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2303] <... futex resumed>) = 0
[pid 2303] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2303] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2304] <... futex resumed>) = 1
[pid 2304] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2304] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2303] <... futex resumed>) = 0
[pid 2303] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2303] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2303] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2303] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2303] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2305], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2305
[pid 2303] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2303] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2304] <... futex resumed>) = 1
[pid 2304] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 2305 attached
) = 0
[pid 2305] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2304] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2305] <... set_robust_list resumed>) = 0
[pid 2304] <... futex resumed>) = 0
[pid 2305] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2304] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2305] <... umount2 resumed>) = 0
[pid 2305] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2303] <... futex resumed>) = 0
[pid 2303] exit_group(0) = ?
[pid 2304] <... futex resumed>) = ?
[pid 2304] +++ exited with 0 +++
[pid 2305] +++ exited with 0 +++
[pid 2303] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2303, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2306
./strace-static-x86_64: Process 2306 attached
[pid 2306] set_robust_list(0x5555560865e0, 24) = 0
[pid 2306] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2306] setpgid(0, 0) = 0
[pid 2306] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2306] write(3, "1000", 4) = 4
[pid 2306] close(3) = 0
[pid 2306] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2306] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2306] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2306] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2307], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2307
[pid 2306] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2306] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2307 attached
<unfinished ...>
[pid 2307] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2307] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2307] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2306] <... futex resumed>) = 0
[pid 2306] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2306] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2307] <... futex resumed>) = 1
[pid 2307] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2307] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2306] <... futex resumed>) = 0
[pid 2306] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2306] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2307] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2307] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2306] <... futex resumed>) = 0
[pid 2306] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2306] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2306] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2306] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2306] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2308], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2308
[pid 2306] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2306] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2308 attached
<unfinished ...>
[pid 2308] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2308] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2307] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2308] <... umount2 resumed>) = 0
[pid 2307] <... umount2 resumed>) = 0
[pid 2308] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2306] <... futex resumed>) = 0
[pid 2308] <... futex resumed>) = 1
[pid 2308] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2307] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2307] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2306] exit_group(0) = ?
[pid 2308] <... futex resumed>) = ?
[pid 2307] <... futex resumed>) = ?
[pid 2308] +++ exited with 0 +++
[pid 2307] +++ exited with 0 +++
[pid 2306] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2306, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2309
./strace-static-x86_64: Process 2309 attached
[pid 2309] set_robust_list(0x5555560865e0, 24) = 0
[pid 2309] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2309] setpgid(0, 0) = 0
[pid 2309] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2309] write(3, "1000", 4) = 4
[pid 2309] close(3) = 0
[pid 2309] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2309] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2309] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2309] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2310 attached
, parent_tid=[2310], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2310
[pid 2309] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2309] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2310] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2310] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2310] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2310] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2309] <... futex resumed>) = 0
[pid 2309] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2309] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2310] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2310] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2310] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2309] <... futex resumed>) = 0
[pid 2310] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2309] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2309] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2310] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2310] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2310] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2309] <... futex resumed>) = 0
[pid 2310] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2309] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2309] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2309] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2309] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2309] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2310] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2309] <... clone resumed>, parent_tid=[2311], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2311
[pid 2310] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2309] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2309] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2311 attached
<unfinished ...>
[pid 2311] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2311] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2310] <... umount2 resumed>) = 0
[pid 2310] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2311] <... umount2 resumed>) = 0
[pid 2310] <... futex resumed>) = 0
[pid 2311] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2309] <... futex resumed>) = 0
[pid 2309] exit_group(0) = ?
[pid 2311] <... futex resumed>) = ?
[pid 2311] +++ exited with 0 +++
[pid 2310] +++ exited with 0 +++
[pid 2309] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2309, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2312 attached
, child_tidptr=0x5555560865d0) = 2312
[pid 2312] set_robust_list(0x5555560865e0, 24) = 0
[pid 2312] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2312] setpgid(0, 0) = 0
[pid 2312] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2312] write(3, "1000", 4) = 4
[pid 2312] close(3) = 0
[pid 2312] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2312] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2312] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2312] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2313], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2313
[pid 2312] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2312] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2313 attached
<unfinished ...>
[pid 2313] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2313] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2313] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2312] <... futex resumed>) = 0
[pid 2312] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2312] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2313] <... futex resumed>) = 1
[pid 2313] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2313] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2312] <... futex resumed>) = 0
[pid 2313] <... futex resumed>) = 1
[pid 2312] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2313] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2312] <... futex resumed>) = 0
[pid 2312] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2313] <... mount resumed>) = 0
[pid 2313] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2312] <... futex resumed>) = 0
[pid 2313] <... futex resumed>) = 1
[pid 2312] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2313] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2312] <... futex resumed>) = 0
[pid 2312] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2312] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2312] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2312] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2313] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2314 attached
[pid 2314] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2312] <... clone resumed>, parent_tid=[2314], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2314
[pid 2313] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2312] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2313] <... futex resumed>) = 0
[pid 2312] <... futex resumed>) = 0
[pid 2312] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2313] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2314] <... set_robust_list resumed>) = 0
[pid 2314] umount2("./file0", MNT_DETACH) = 0
[pid 2314] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2314] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2312] <... futex resumed>) = 0
[pid 2312] exit_group(0) = ?
[pid 2313] <... futex resumed>) = ?
[pid 2313] +++ exited with 0 +++
[pid 2314] <... futex resumed>) = ?
[pid 2314] +++ exited with 0 +++
[pid 2312] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2312, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2315
./strace-static-x86_64: Process 2315 attached
[pid 2315] set_robust_list(0x5555560865e0, 24) = 0
[pid 2315] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2315] setpgid(0, 0) = 0
[pid 2315] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2315] write(3, "1000", 4) = 4
[pid 2315] close(3) = 0
[pid 2315] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2315] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2315] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2315] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2316], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2316
[pid 2315] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2315] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2316 attached
<unfinished ...>
[pid 2316] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2316] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2316] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2315] <... futex resumed>) = 0
[pid 2315] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2315] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2316] <... futex resumed>) = 1
[pid 2316] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2316] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2315] <... futex resumed>) = 0
[pid 2315] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2315] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2316] <... futex resumed>) = 1
[pid 2316] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2316] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2315] <... futex resumed>) = 0
[pid 2316] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2315] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2315] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2315] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2315] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2315] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2317 attached
<unfinished ...>
[pid 2317] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2315] <... clone resumed>, parent_tid=[2317], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2317
[pid 2317] <... set_robust_list resumed>) = 0
[pid 2315] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2317] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2315] <... futex resumed>) = 0
[pid 2315] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2317] <... umount2 resumed>) = 0
[pid 2316] <... umount2 resumed>) = 0
[pid 2317] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2315] <... futex resumed>) = 0
[pid 2317] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2316] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2316] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2315] exit_group(0) = ?
[pid 2316] <... futex resumed>) = ?
[pid 2317] <... futex resumed>) = ?
[pid 2317] +++ exited with 0 +++
[pid 2316] +++ exited with 0 +++
[pid 2315] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2315, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2318
./strace-static-x86_64: Process 2318 attached
[pid 2318] set_robust_list(0x5555560865e0, 24) = 0
[pid 2318] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2318] setpgid(0, 0) = 0
[pid 2318] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2318] write(3, "1000", 4) = 4
[pid 2318] close(3) = 0
[pid 2318] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2318] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2318] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2318] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2319 attached
, parent_tid=[2319], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2319
[pid 2319] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2318] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2319] <... set_robust_list resumed>) = 0
[pid 2318] <... futex resumed>) = 0
[pid 2318] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2319] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2319] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2318] <... futex resumed>) = 0
[pid 2319] <... futex resumed>) = 1
[pid 2318] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2319] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2318] <... futex resumed>) = 0
[pid 2318] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2319] <... mount resumed>) = 0
[pid 2319] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2318] <... futex resumed>) = 0
[pid 2318] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2319] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2318] <... futex resumed>) = 0
[pid 2318] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2319] <... mount resumed>) = 0
[pid 2319] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2318] <... futex resumed>) = 0
[pid 2318] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2318] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2318] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2318] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2319] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2318] <... mprotect resumed>) = 0
[pid 2318] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2320], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2320
[pid 2318] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2318] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2319] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2320 attached
[pid 2320] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2320] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2319] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2320] <... umount2 resumed>) = 0
[pid 2320] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2318] <... futex resumed>) = 0
[pid 2318] exit_group(0 <unfinished ...>
[pid 2319] <... futex resumed>) = 0
[pid 2318] <... exit_group resumed>) = ?
[pid 2320] <... futex resumed>) = ?
[pid 2320] +++ exited with 0 +++
[pid 2319] +++ exited with 0 +++
[pid 2318] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2318, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2321
./strace-static-x86_64: Process 2321 attached
[pid 2321] set_robust_list(0x5555560865e0, 24) = 0
[pid 2321] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2321] setpgid(0, 0) = 0
[pid 2321] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2321] write(3, "1000", 4) = 4
[pid 2321] close(3) = 0
[pid 2321] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2321] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2321] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2321] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2322], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2322
./strace-static-x86_64: Process 2322 attached
[pid 2321] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2321] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2322] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2322] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2322] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2321] <... futex resumed>) = 0
[pid 2321] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2322] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2321] <... futex resumed>) = 0
[pid 2321] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2322] <... mount resumed>) = 0
[pid 2322] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2321] <... futex resumed>) = 0
[pid 2321] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2321] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2322] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2322] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2321] <... futex resumed>) = 0
[pid 2321] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2321] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2321] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2321] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2321] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2322] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2321] <... clone resumed>, parent_tid=[2323], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2323
[pid 2321] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2321] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2323 attached
<unfinished ...>
[pid 2323] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2323] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2322] <... umount2 resumed>) = 0
[pid 2323] <... umount2 resumed>) = 0
[pid 2323] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2321] <... futex resumed>) = 0
[pid 2322] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2323] <... futex resumed>) = 1
[pid 2322] <... futex resumed>) = 0
[pid 2323] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2322] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2321] exit_group(0) = ?
[pid 2322] <... futex resumed>) = ? <unavailable>
[pid 2323] <... futex resumed>) = ?
[pid 2323] +++ exited with 0 +++
[pid 2322] +++ exited with 0 +++
[pid 2321] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2321, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2325
./strace-static-x86_64: Process 2325 attached
[pid 2325] set_robust_list(0x5555560865e0, 24) = 0
[pid 2325] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2325] setpgid(0, 0) = 0
[pid 2325] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2325] write(3, "1000", 4) = 4
[pid 2325] close(3) = 0
[pid 2325] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2325] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2325] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2325] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2326 attached
<unfinished ...>
[pid 2326] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2326] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2325] <... clone resumed>, parent_tid=[2326], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2326
[pid 2325] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2326] <... futex resumed>) = 0
[pid 2326] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2326] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2326] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2325] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2325] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2326] <... futex resumed>) = 0
[pid 2326] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2325] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2326] <... mount resumed>) = 0
[pid 2326] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2326] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2325] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2325] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2326] <... futex resumed>) = 0
[pid 2326] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2325] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2326] <... mount resumed>) = 0
[pid 2326] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2325] <... futex resumed>) = 0
[pid 2326] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2325] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2326] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2325] <... futex resumed>) = 0
[pid 2326] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2325] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2326] <... umount2 resumed>) = 0
[pid 2325] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2326] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2325] <... mmap resumed>) = 0x7f236e446000
[pid 2326] <... futex resumed>) = 0
[pid 2325] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2326] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2325] <... mprotect resumed>) = 0
[pid 2325] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2327 attached
, parent_tid=[2327], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2327
[pid 2327] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2327] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2325] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2327] <... futex resumed>) = 0
[pid 2325] <... futex resumed>) = 1
[pid 2327] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2325] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2327] <... umount2 resumed>) = 0
[pid 2327] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2325] <... futex resumed>) = 0
[pid 2325] exit_group(0) = ?
[pid 2326] <... futex resumed>) = ?
[pid 2326] +++ exited with 0 +++
[pid 2327] +++ exited with 0 +++
[pid 2325] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2325, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2328
./strace-static-x86_64: Process 2328 attached
[pid 2328] set_robust_list(0x5555560865e0, 24) = 0
[pid 2328] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2328] setpgid(0, 0) = 0
[pid 2328] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2328] write(3, "1000", 4) = 4
[pid 2328] close(3) = 0
[pid 2328] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2328] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2328] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2328] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2329], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2329
[pid 2328] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2328] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2329 attached
<unfinished ...>
[pid 2329] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2329] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2329] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2328] <... futex resumed>) = 0
[pid 2328] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2328] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2329] <... futex resumed>) = 1
[pid 2329] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2329] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2328] <... futex resumed>) = 0
[pid 2328] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2328] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2329] <... futex resumed>) = 1
[pid 2329] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2329] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2328] <... futex resumed>) = 0
[pid 2328] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2328] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2328] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2328] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2328] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2329] <... futex resumed>) = 1
[pid 2328] <... clone resumed>, parent_tid=[2330], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2330
[pid 2329] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2328] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2328] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2330 attached
<unfinished ...>
[pid 2329] <... umount2 resumed>) = 0
[pid 2329] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2330] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2329] <... futex resumed>) = 0
[pid 2329] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2330] <... set_robust_list resumed>) = 0
[pid 2330] umount2("./file0", MNT_DETACH) = 0
[pid 2330] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2328] <... futex resumed>) = 0
[pid 2328] exit_group(0) = ?
[pid 2329] <... futex resumed>) = ?
[pid 2329] +++ exited with 0 +++
[pid 2330] +++ exited with 0 +++
[pid 2328] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2328, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2331
./strace-static-x86_64: Process 2331 attached
[pid 2331] set_robust_list(0x5555560865e0, 24) = 0
[pid 2331] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2331] setpgid(0, 0) = 0
[pid 2331] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2331] write(3, "1000", 4) = 4
[pid 2331] close(3) = 0
[pid 2331] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2331] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2331] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2331] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2332], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2332
[pid 2331] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2331] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2332 attached
<unfinished ...>
[pid 2332] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2332] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2332] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2331] <... futex resumed>) = 0
[pid 2331] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2331] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2332] <... futex resumed>) = 1
[pid 2332] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2332] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2331] <... futex resumed>) = 0
[pid 2331] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2331] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2332] <... futex resumed>) = 1
[pid 2332] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2332] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2331] <... futex resumed>) = 0
[pid 2332] <... futex resumed>) = 1
[pid 2331] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2332] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2331] <... futex resumed>) = 0
[pid 2331] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2331] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2331] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2331] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2332] <... umount2 resumed>) = 0
[pid 2332] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2331] <... clone resumed>, parent_tid=[2333], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2333
./strace-static-x86_64: Process 2333 attached
[pid 2332] <... futex resumed>) = 0
[pid 2331] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2333] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2332] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2331] <... futex resumed>) = 0
[pid 2333] <... set_robust_list resumed>) = 0
[pid 2331] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2333] umount2("./file0", MNT_DETACH) = 0
[pid 2333] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2331] <... futex resumed>) = 0
[pid 2333] <... futex resumed>) = 1
[pid 2331] exit_group(0 <unfinished ...>
[pid 2333] ????( <unfinished ...>
[pid 2331] <... exit_group resumed>) = ?
[pid 2333] <... ???? resumed>) = ?
[pid 2332] <... futex resumed>) = ?
[pid 2332] +++ exited with 0 +++
[pid 2333] +++ exited with 0 +++
[pid 2331] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2331, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2334
./strace-static-x86_64: Process 2334 attached
[pid 2334] set_robust_list(0x5555560865e0, 24) = 0
[pid 2334] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2334] setpgid(0, 0) = 0
[pid 2334] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2334] write(3, "1000", 4) = 4
[pid 2334] close(3) = 0
[pid 2334] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2334] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2334] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2334] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2335], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2335
./strace-static-x86_64: Process 2335 attached
[pid 2335] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2335] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2334] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2335] <... futex resumed>) = 0
[pid 2335] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2335] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2335] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2334] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2334] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2335] <... futex resumed>) = 0
[pid 2335] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2334] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2335] <... mount resumed>) = 0
[pid 2335] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2335] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2334] <... futex resumed>) = 0
[pid 2334] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2335] <... futex resumed>) = 0
[pid 2334] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2335] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2335] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2334] <... futex resumed>) = 0
[pid 2335] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2334] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2335] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2334] <... futex resumed>) = 0
[pid 2335] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2334] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2334] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2334] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2335] <... umount2 resumed>) = 0
[pid 2334] <... mprotect resumed>) = 0
[pid 2335] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2334] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2335] <... futex resumed>) = 0
[pid 2335] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2336 attached
<unfinished ...>
[pid 2334] <... clone resumed>, parent_tid=[2336], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2336
[pid 2336] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2334] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2336] <... set_robust_list resumed>) = 0
[pid 2334] <... futex resumed>) = 0
[pid 2336] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2334] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2336] <... umount2 resumed>) = 0
[pid 2336] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2334] <... futex resumed>) = 0
[pid 2334] exit_group(0 <unfinished ...>
[pid 2336] ????( <unfinished ...>
[pid 2334] <... exit_group resumed>) = ?
[pid 2336] <... ???? resumed>) = ?
[pid 2335] <... futex resumed>) = ?
[pid 2335] +++ exited with 0 +++
[pid 2336] +++ exited with 0 +++
[pid 2334] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2334, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2337
./strace-static-x86_64: Process 2337 attached
[pid 2337] set_robust_list(0x5555560865e0, 24) = 0
[pid 2337] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2337] setpgid(0, 0) = 0
[pid 2337] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2337] write(3, "1000", 4) = 4
[pid 2337] close(3) = 0
[pid 2337] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2337] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2337] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2337] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2338 attached
, parent_tid=[2338], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2338
[pid 2338] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2338] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2337] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2338] <... futex resumed>) = 0
[pid 2337] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2338] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2338] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2338] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2337] <... futex resumed>) = 0
[pid 2337] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2338] <... futex resumed>) = 0
[pid 2338] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2337] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2338] <... mount resumed>) = 0
[pid 2338] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2338] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2337] <... futex resumed>) = 0
[pid 2337] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2338] <... futex resumed>) = 0
[pid 2338] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2337] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2338] <... mount resumed>) = 0
[pid 2338] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2338] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2337] <... futex resumed>) = 0
[pid 2337] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2338] <... futex resumed>) = 0
[pid 2337] <... futex resumed>) = 1
[pid 2338] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2337] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2337] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2337] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2337] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2338] <... umount2 resumed>) = 0
[pid 2338] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2337] <... clone resumed>, parent_tid=[2339], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2339
[pid 2338] <... futex resumed>) = 0
[pid 2337] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2338] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2337] <... futex resumed>) = 0
./strace-static-x86_64: Process 2339 attached
[pid 2339] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2337] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2339] <... set_robust_list resumed>) = 0
[pid 2339] umount2("./file0", MNT_DETACH) = 0
[pid 2339] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2337] <... futex resumed>) = 0
[pid 2339] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2337] exit_group(0) = ?
[pid 2338] <... futex resumed>) = ?
[pid 2338] +++ exited with 0 +++
[pid 2339] <... futex resumed>) = ?
[pid 2339] +++ exited with 0 +++
[pid 2337] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2337, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2340
./strace-static-x86_64: Process 2340 attached
[pid 2340] set_robust_list(0x5555560865e0, 24) = 0
[pid 2340] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2340] setpgid(0, 0) = 0
[pid 2340] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2340] write(3, "1000", 4) = 4
[pid 2340] close(3) = 0
[pid 2340] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2340] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2340] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2340] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2341 attached
<unfinished ...>
[pid 2341] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2341] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2340] <... clone resumed>, parent_tid=[2341], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2341
[pid 2340] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2341] <... futex resumed>) = 0
[pid 2341] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2341] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2340] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2341] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2340] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2340] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2341] <... futex resumed>) = 0
[pid 2341] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2340] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2341] <... mount resumed>) = 0
[pid 2341] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2341] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2340] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2340] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2341] <... futex resumed>) = 0
[pid 2340] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2341] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2341] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2340] <... futex resumed>) = 0
[pid 2341] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2340] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2340] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2340] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2340] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2340] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2341] <... umount2 resumed>) = 0
[pid 2341] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2341] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2340] <... clone resumed>, parent_tid=[2342], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2342
./strace-static-x86_64: Process 2342 attached
[pid 2340] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2342] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2340] <... futex resumed>) = 0
[pid 2342] <... set_robust_list resumed>) = 0
[pid 2340] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2342] umount2("./file0", MNT_DETACH) = 0
[pid 2342] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2342] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2340] <... futex resumed>) = 0
[pid 2340] exit_group(0 <unfinished ...>
[pid 2341] <... futex resumed>) = ?
[pid 2340] <... exit_group resumed>) = ?
[pid 2342] <... futex resumed>) = 231
[pid 2341] +++ exited with 0 +++
[pid 2342] +++ exited with 0 +++
[pid 2340] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2340, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2343
./strace-static-x86_64: Process 2343 attached
[pid 2343] set_robust_list(0x5555560865e0, 24) = 0
[pid 2343] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2343] setpgid(0, 0) = 0
[pid 2343] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2343] write(3, "1000", 4) = 4
[pid 2343] close(3) = 0
[pid 2343] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2343] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2343] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2343] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2344 attached
<unfinished ...>
[pid 2344] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2343] <... clone resumed>, parent_tid=[2344], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2344
[pid 2344] <... set_robust_list resumed>) = 0
[pid 2343] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2343] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2344] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2344] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2344] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2343] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2343] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2344] <... futex resumed>) = 0
[pid 2344] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2343] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2344] <... mount resumed>) = 0
[pid 2344] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2344] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2343] <... futex resumed>) = 0
[pid 2343] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2344] <... futex resumed>) = 0
[pid 2343] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2344] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2344] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2343] <... futex resumed>) = 0
[pid 2344] <... futex resumed>) = 1
[pid 2343] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2344] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2343] <... futex resumed>) = 0
[pid 2343] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2343] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2343] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2343] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2344] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2345 attached
[pid 2344] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2343] <... clone resumed>, parent_tid=[2345], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2345
[pid 2345] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2344] <... futex resumed>) = 0
[pid 2343] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2345] <... set_robust_list resumed>) = 0
[pid 2344] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2343] <... futex resumed>) = 0
[pid 2345] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2343] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2345] <... umount2 resumed>) = 0
[pid 2345] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2343] <... futex resumed>) = 0
[pid 2345] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2343] exit_group(0) = ?
[pid 2344] <... futex resumed>) = ?
[pid 2345] <... futex resumed>) = ?
[pid 2344] +++ exited with 0 +++
[pid 2345] +++ exited with 0 +++
[pid 2343] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2343, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2346
./strace-static-x86_64: Process 2346 attached
[pid 2346] set_robust_list(0x5555560865e0, 24) = 0
[pid 2346] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2346] setpgid(0, 0) = 0
[pid 2346] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2346] write(3, "1000", 4) = 4
[pid 2346] close(3) = 0
[pid 2346] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2346] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2346] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2346] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2347 attached
<unfinished ...>
[pid 2347] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2347] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2346] <... clone resumed>, parent_tid=[2347], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2347
[pid 2346] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2347] <... futex resumed>) = 0
[pid 2347] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2347] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2346] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2347] <... futex resumed>) = 0
[pid 2347] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2346] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2346] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2347] <... futex resumed>) = 0
[pid 2346] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2347] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2347] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2347] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2346] <... futex resumed>) = 0
[pid 2346] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2347] <... futex resumed>) = 0
[pid 2347] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2346] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2347] <... mount resumed>) = 0
[pid 2347] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2347] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2346] <... futex resumed>) = 0
[pid 2346] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2346] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2346] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2346] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2346] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2348], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2348
[pid 2346] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2346] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2348 attached
<unfinished ...>
[pid 2348] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2348] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2347] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2347] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2348] <... umount2 resumed>) = 0
[pid 2347] <... umount2 resumed>) = 0
[pid 2348] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2346] <... futex resumed>) = 0
[pid 2348] <... futex resumed>) = 1
[pid 2348] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2347] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2347] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2346] exit_group(0 <unfinished ...>
[pid 2347] <... futex resumed>) = 231
[pid 2346] <... exit_group resumed>) = ?
[pid 2348] <... futex resumed>) = ?
[pid 2348] +++ exited with 0 +++
[pid 2347] +++ exited with 0 +++
[pid 2346] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2346, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2349
./strace-static-x86_64: Process 2349 attached
[pid 2349] set_robust_list(0x5555560865e0, 24) = 0
[pid 2349] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2349] setpgid(0, 0) = 0
[pid 2349] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2349] write(3, "1000", 4) = 4
[pid 2349] close(3) = 0
[pid 2349] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2349] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2349] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2349] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2350 attached
, parent_tid=[2350], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2350
[pid 2350] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2349] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2350] <... set_robust_list resumed>) = 0
[pid 2349] <... futex resumed>) = 0
[pid 2349] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2350] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2350] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2349] <... futex resumed>) = 0
[pid 2350] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2349] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2350] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2349] <... futex resumed>) = 0
[pid 2350] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2349] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2350] <... mount resumed>) = 0
[pid 2350] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2349] <... futex resumed>) = 0
[pid 2350] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2349] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2350] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2349] <... futex resumed>) = 0
[pid 2350] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2349] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2350] <... mount resumed>) = 0
[pid 2350] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2349] <... futex resumed>) = 0
[pid 2350] <... futex resumed>) = 1
[pid 2349] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2350] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2349] <... futex resumed>) = 0
[pid 2349] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2349] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2349] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2349] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2351 attached
<unfinished ...>
[pid 2350] <... umount2 resumed>) = 0
[pid 2349] <... clone resumed>, parent_tid=[2351], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2351
[pid 2351] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2350] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2349] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2351] <... set_robust_list resumed>) = 0
[pid 2350] <... futex resumed>) = 0
[pid 2349] <... futex resumed>) = 0
[pid 2351] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2349] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2350] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2351] <... umount2 resumed>) = 0
[pid 2351] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2349] <... futex resumed>) = 0
[pid 2351] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2349] exit_group(0) = ?
[pid 2350] <... futex resumed>) = ?
[pid 2350] +++ exited with 0 +++
[pid 2351] <... futex resumed>) = ?
[pid 2351] +++ exited with 0 +++
[pid 2349] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2349, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2352
./strace-static-x86_64: Process 2352 attached
[pid 2352] set_robust_list(0x5555560865e0, 24) = 0
[pid 2352] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2352] setpgid(0, 0) = 0
[pid 2352] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2352] write(3, "1000", 4) = 4
[pid 2352] close(3) = 0
[pid 2352] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2352] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2352] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2352] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2353], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2353
[pid 2352] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2352] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2353 attached
<unfinished ...>
[pid 2353] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2353] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2353] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2352] <... futex resumed>) = 0
[pid 2352] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2352] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2353] <... futex resumed>) = 1
[pid 2353] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2353] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2352] <... futex resumed>) = 0
[pid 2353] <... futex resumed>) = 1
[pid 2352] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2353] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2352] <... futex resumed>) = 0
[pid 2352] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2353] <... mount resumed>) = 0
[pid 2353] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2352] <... futex resumed>) = 0
[pid 2353] <... futex resumed>) = 1
[pid 2352] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2353] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2352] <... futex resumed>) = 0
[pid 2352] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2352] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2352] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2352] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2353] <... umount2 resumed>) = 0
[pid 2353] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2354 attached
) = 0
[pid 2352] <... clone resumed>, parent_tid=[2354], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2354
[pid 2354] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2353] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2352] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2354] <... set_robust_list resumed>) = 0
[pid 2352] <... futex resumed>) = 0
[pid 2354] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2352] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2354] <... umount2 resumed>) = 0
[pid 2354] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2352] <... futex resumed>) = 0
[pid 2354] <... futex resumed>) = 1
[pid 2352] exit_group(0 <unfinished ...>
[pid 2354] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2352] <... exit_group resumed>) = ?
[pid 2353] <... futex resumed>) = ?
[pid 2353] +++ exited with 0 +++
[pid 2354] <... futex resumed>) = ?
[pid 2354] +++ exited with 0 +++
[pid 2352] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2352, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2355
./strace-static-x86_64: Process 2355 attached
[pid 2355] set_robust_list(0x5555560865e0, 24) = 0
[pid 2355] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2355] setpgid(0, 0) = 0
[pid 2355] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2355] write(3, "1000", 4) = 4
[pid 2355] close(3) = 0
[pid 2355] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2355] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2355] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2355] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2356 attached
<unfinished ...>
[pid 2356] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2356] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2355] <... clone resumed>, parent_tid=[2356], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2356
[pid 2355] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2356] <... futex resumed>) = 0
[pid 2356] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2356] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2356] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2355] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2355] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2356] <... futex resumed>) = 0
[pid 2356] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2355] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2356] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2356] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2355] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2355] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2356] <... futex resumed>) = 0
[pid 2356] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2355] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2356] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2356] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2355] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2355] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2356] <... futex resumed>) = 0
[pid 2356] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2355] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2355] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2356] <... umount2 resumed>) = 0
[pid 2355] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2355] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2356] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2356] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2355] <... clone resumed>, parent_tid=[2357], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2357
[pid 2355] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2355] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2357 attached
<unfinished ...>
[pid 2357] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2357] umount2("./file0", MNT_DETACH) = 0
[pid 2357] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2355] <... futex resumed>) = 0
[pid 2355] exit_group(0 <unfinished ...>
[pid 2357] <... futex resumed>) = 1
[pid 2355] <... exit_group resumed>) = ?
[pid 2356] <... futex resumed>) = ?
[pid 2356] +++ exited with 0 +++
[pid 2357] +++ exited with 0 +++
[pid 2355] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2355, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2358
./strace-static-x86_64: Process 2358 attached
[pid 2358] set_robust_list(0x5555560865e0, 24) = 0
[pid 2358] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2358] setpgid(0, 0) = 0
[pid 2358] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2358] write(3, "1000", 4) = 4
[pid 2358] close(3) = 0
[pid 2358] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2358] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2358] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2358] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2359 attached
, parent_tid=[2359], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2359
[pid 2359] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2359] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2358] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2359] <... futex resumed>) = 0
[pid 2359] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2358] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2359] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2359] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2358] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2358] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2359] <... futex resumed>) = 0
[pid 2359] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2358] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2359] <... mount resumed>) = 0
[pid 2359] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2359] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2358] <... futex resumed>) = 0
[pid 2358] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2359] <... futex resumed>) = 0
[pid 2359] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2358] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2359] <... mount resumed>) = 0
[pid 2359] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2359] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2358] <... futex resumed>) = 0
[pid 2358] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2359] <... futex resumed>) = 0
[pid 2358] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2359] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2358] <... futex resumed>) = 0
[pid 2358] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2359] <... umount2 resumed>) = 0
[pid 2359] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2359] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2358] <... mmap resumed>) = 0x7f236e446000
[pid 2358] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2358] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2360 attached
, parent_tid=[2360], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2360
[pid 2360] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2360] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2358] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2360] <... futex resumed>) = 0
[pid 2360] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2358] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2360] <... umount2 resumed>) = 0
[pid 2360] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2358] <... futex resumed>) = 0
[pid 2360] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2358] exit_group(0 <unfinished ...>
[pid 2360] <... futex resumed>) = ?
[pid 2359] <... futex resumed>) = ?
[pid 2358] <... exit_group resumed>) = ?
[pid 2359] +++ exited with 0 +++
[pid 2360] +++ exited with 0 +++
[pid 2358] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2358, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2361
./strace-static-x86_64: Process 2361 attached
[pid 2361] set_robust_list(0x5555560865e0, 24) = 0
[pid 2361] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2361] setpgid(0, 0) = 0
[pid 2361] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2361] write(3, "1000", 4) = 4
[pid 2361] close(3) = 0
[pid 2361] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2361] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2361] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2361] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2362 attached
, parent_tid=[2362], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2362
[pid 2362] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2362] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2361] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2362] <... futex resumed>) = 0
[pid 2361] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2362] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2362] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2362] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2361] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2361] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2362] <... futex resumed>) = 0
[pid 2362] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2361] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2362] <... mount resumed>) = 0
[pid 2362] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2361] <... futex resumed>) = 0
[pid 2361] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2361] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2362] <... futex resumed>) = 1
[pid 2362] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2362] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2361] <... futex resumed>) = 0
[pid 2362] <... futex resumed>) = 1
[pid 2361] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2362] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2361] <... futex resumed>) = 0
[pid 2361] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2361] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2361] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2361] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2362] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2363 attached
[pid 2362] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2363] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2361] <... clone resumed>, parent_tid=[2363], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2363
[pid 2362] <... futex resumed>) = 0
[pid 2362] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2361] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2361] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2363] <... set_robust_list resumed>) = 0
[pid 2363] umount2("./file0", MNT_DETACH) = 0
[pid 2363] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2361] <... futex resumed>) = 0
[pid 2363] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2361] exit_group(0) = ?
[pid 2362] <... futex resumed>) = ?
[pid 2363] <... futex resumed>) = ?
[pid 2362] +++ exited with 0 +++
[pid 2363] +++ exited with 0 +++
[pid 2361] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2361, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2364
./strace-static-x86_64: Process 2364 attached
[pid 2364] set_robust_list(0x5555560865e0, 24) = 0
[pid 2364] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2364] setpgid(0, 0) = 0
[pid 2364] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2364] write(3, "1000", 4) = 4
[pid 2364] close(3) = 0
[pid 2364] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2364] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2364] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2364] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2365 attached
<unfinished ...>
[pid 2365] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2365] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2364] <... clone resumed>, parent_tid=[2365], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2365
[pid 2364] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2365] <... futex resumed>) = 0
[pid 2364] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2365] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2365] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2365] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2364] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2364] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2365] <... futex resumed>) = 0
[pid 2364] <... futex resumed>) = 1
[pid 2365] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2364] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2365] <... mount resumed>) = 0
[pid 2365] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2365] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2364] <... futex resumed>) = 0
[pid 2364] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2365] <... futex resumed>) = 0
[pid 2365] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2364] <... futex resumed>) = 1
[pid 2364] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2365] <... mount resumed>) = 0
[pid 2365] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2364] <... futex resumed>) = 0
[pid 2364] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2364] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2364] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2365] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2364] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2364] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2365] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2366 attached
[pid 2365] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2364] <... clone resumed>, parent_tid=[2366], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2366
[pid 2364] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2364] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2366] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2365] <... futex resumed>) = 0
[pid 2366] <... set_robust_list resumed>) = 0
[pid 2365] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2366] umount2("./file0", MNT_DETACH) = 0
[pid 2366] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2364] <... futex resumed>) = 0
[pid 2364] exit_group(0) = ?
[pid 2365] <... futex resumed>) = ?
[pid 2365] +++ exited with 0 +++
[pid 2366] +++ exited with 0 +++
[pid 2364] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2364, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2367
./strace-static-x86_64: Process 2367 attached
[pid 2367] set_robust_list(0x5555560865e0, 24) = 0
[pid 2367] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2367] setpgid(0, 0) = 0
[pid 2367] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2367] write(3, "1000", 4) = 4
[pid 2367] close(3) = 0
[pid 2367] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2367] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2367] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2367] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2368], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2368
./strace-static-x86_64: Process 2368 attached
[pid 2368] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2368] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2367] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2368] <... futex resumed>) = 0
[pid 2368] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2367] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2368] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2368] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2367] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2367] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2368] <... futex resumed>) = 0
[pid 2368] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2367] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2368] <... mount resumed>) = 0
[pid 2368] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2367] <... futex resumed>) = 0
[pid 2367] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2367] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2368] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2368] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2367] <... futex resumed>) = 0
[pid 2367] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2367] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2367] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2367] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2368] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2367] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2369], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2369
[pid 2367] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2367] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2369 attached
<unfinished ...>
[pid 2369] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2369] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2368] <... umount2 resumed>) = 0
[pid 2368] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2369] <... umount2 resumed>) = 0
[pid 2368] <... futex resumed>) = 0
[pid 2369] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2367] <... futex resumed>) = 0
[pid 2367] exit_group(0) = ?
[pid 2369] <... futex resumed>) = ?
[pid 2369] +++ exited with 0 +++
[pid 2368] +++ exited with 0 +++
[pid 2367] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2367, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2370
./strace-static-x86_64: Process 2370 attached
[pid 2370] set_robust_list(0x5555560865e0, 24) = 0
[pid 2370] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2370] setpgid(0, 0) = 0
[pid 2370] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2370] write(3, "1000", 4) = 4
[pid 2370] close(3) = 0
[pid 2370] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2370] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2370] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2370] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2371], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2371
[pid 2370] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2370] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2371 attached
<unfinished ...>
[pid 2371] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2371] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2371] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2370] <... futex resumed>) = 0
[pid 2370] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2370] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2371] <... futex resumed>) = 1
[pid 2371] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2371] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2370] <... futex resumed>) = 0
[pid 2370] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2370] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2371] <... futex resumed>) = 1
[pid 2371] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2371] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2370] <... futex resumed>) = 0
[pid 2371] <... futex resumed>) = 1
[pid 2370] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2371] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2370] <... futex resumed>) = 0
[pid 2370] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2370] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2370] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2370] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2371] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2372 attached
[pid 2371] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2370] <... clone resumed>, parent_tid=[2372], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2372
[pid 2372] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2371] <... futex resumed>) = 0
[pid 2370] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2372] <... set_robust_list resumed>) = 0
[pid 2371] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2370] <... futex resumed>) = 0
[pid 2372] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2370] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2372] <... umount2 resumed>) = 0
[pid 2372] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2370] <... futex resumed>) = 0
[pid 2370] exit_group(0 <unfinished ...>
[pid 2372] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2370] <... exit_group resumed>) = ?
[pid 2371] <... futex resumed>) = ?
[pid 2371] +++ exited with 0 +++
[pid 2372] <... futex resumed>) = ?
[pid 2372] +++ exited with 0 +++
[pid 2370] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2370, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2373
./strace-static-x86_64: Process 2373 attached
[pid 2373] set_robust_list(0x5555560865e0, 24) = 0
[pid 2373] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2373] setpgid(0, 0) = 0
[pid 2373] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2373] write(3, "1000", 4) = 4
[pid 2373] close(3) = 0
[pid 2373] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2373] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2373] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2373] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2374 attached
<unfinished ...>
[pid 2374] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2374] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2373] <... clone resumed>, parent_tid=[2374], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2374
[pid 2373] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2374] <... futex resumed>) = 0
[pid 2374] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2373] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2374] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2374] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2373] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2373] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2374] <... futex resumed>) = 0
[pid 2373] <... futex resumed>) = 1
[pid 2374] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2373] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2374] <... mount resumed>) = 0
[pid 2374] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2373] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2374] <... futex resumed>) = 0
[pid 2373] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2374] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2373] <... futex resumed>) = 0
[pid 2373] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2374] <... mount resumed>) = 0
[pid 2374] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2373] <... futex resumed>) = 0
[pid 2373] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2374] <... futex resumed>) = 1
[pid 2373] <... futex resumed>) = 0
[pid 2374] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2373] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2373] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2373] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2373] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2374] <... umount2 resumed>) = 0
[pid 2374] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2374] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2375 attached
<unfinished ...>
[pid 2375] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2373] <... clone resumed>, parent_tid=[2375], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2375
[pid 2375] <... set_robust_list resumed>) = 0
[pid 2373] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2375] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2373] <... futex resumed>) = 0
[pid 2373] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2375] <... umount2 resumed>) = 0
[pid 2375] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2375] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2373] <... futex resumed>) = 0
[pid 2373] exit_group(0) = ?
[pid 2374] <... futex resumed>) = ?
[pid 2374] +++ exited with 0 +++
[pid 2375] <... futex resumed>) = ?
[pid 2375] +++ exited with 0 +++
[pid 2373] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2373, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2376 attached
, child_tidptr=0x5555560865d0) = 2376
[pid 2376] set_robust_list(0x5555560865e0, 24) = 0
[pid 2376] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2376] setpgid(0, 0) = 0
[pid 2376] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2376] write(3, "1000", 4) = 4
[pid 2376] close(3) = 0
[pid 2376] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2376] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2376] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2376] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2377 attached
, parent_tid=[2377], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2377
[pid 2377] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2377] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2376] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2377] <... futex resumed>) = 0
[pid 2377] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2377] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2377] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2376] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2376] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2377] <... futex resumed>) = 0
[pid 2376] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2377] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2377] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2377] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2376] <... futex resumed>) = 0
[pid 2376] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2377] <... futex resumed>) = 0
[pid 2377] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2376] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2377] <... mount resumed>) = 0
[pid 2377] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2377] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2376] <... futex resumed>) = 0
[pid 2376] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2377] <... futex resumed>) = 0
[pid 2377] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2376] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2376] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2377] <... umount2 resumed>) = 0
[pid 2376] <... mmap resumed>) = 0x7f236e446000
[pid 2377] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2376] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2377] <... futex resumed>) = 0
[pid 2377] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2376] <... mprotect resumed>) = 0
[pid 2376] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2378 attached
, parent_tid=[2378], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2378
[pid 2378] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2376] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2378] <... set_robust_list resumed>) = 0
[pid 2376] <... futex resumed>) = 0
[pid 2378] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2376] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2378] <... umount2 resumed>) = 0
[pid 2378] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2376] <... futex resumed>) = 0
[pid 2378] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2376] exit_group(0 <unfinished ...>
[pid 2378] <... futex resumed>) = ?
[pid 2377] <... futex resumed>) = ?
[pid 2376] <... exit_group resumed>) = ?
[pid 2377] +++ exited with 0 +++
[pid 2378] +++ exited with 0 +++
[pid 2376] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2376, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2379
./strace-static-x86_64: Process 2379 attached
[pid 2379] set_robust_list(0x5555560865e0, 24) = 0
[pid 2379] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2379] setpgid(0, 0) = 0
[pid 2379] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2379] write(3, "1000", 4) = 4
[pid 2379] close(3) = 0
[pid 2379] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2379] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2379] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2379] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2380 attached
, parent_tid=[2380], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2380
[pid 2380] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2380] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2379] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2380] <... futex resumed>) = 0
[pid 2379] <... futex resumed>) = 1
[pid 2379] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2380] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2380] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2379] <... futex resumed>) = 0
[pid 2380] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2379] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2379] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2380] <... mount resumed>) = 0
[pid 2380] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2379] <... futex resumed>) = 0
[pid 2380] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2379] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2379] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2380] <... mount resumed>) = 0
[pid 2380] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2379] <... futex resumed>) = 0
[pid 2380] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2379] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2379] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2379] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2379] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2379] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2380] <... umount2 resumed>) = 0
[pid 2380] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2380] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2379] <... clone resumed>, parent_tid=[2381], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2381
[pid 2379] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2379] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2381 attached
<unfinished ...>
[pid 2381] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2381] umount2("./file0", MNT_DETACH) = 0
[pid 2381] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2379] <... futex resumed>) = 0
[pid 2379] exit_group(0) = ?
[pid 2380] <... futex resumed>) = ?
[pid 2380] +++ exited with 0 +++
[pid 2381] +++ exited with 0 +++
[pid 2379] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2379, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2382
./strace-static-x86_64: Process 2382 attached
[pid 2382] set_robust_list(0x5555560865e0, 24) = 0
[pid 2382] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2382] setpgid(0, 0) = 0
[pid 2382] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2382] write(3, "1000", 4) = 4
[pid 2382] close(3) = 0
[pid 2382] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2382] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2382] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2382] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2383 attached
, parent_tid=[2383], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2383
[pid 2382] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2382] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2383] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2383] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2383] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2382] <... futex resumed>) = 0
[pid 2382] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2382] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2383] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2383] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2382] <... futex resumed>) = 0
[pid 2382] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2383] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2382] <... futex resumed>) = 0
[pid 2382] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2383] <... mount resumed>) = 0
[pid 2383] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2382] <... futex resumed>) = 0
[pid 2382] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2382] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2382] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2382] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2382] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2383] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2382] <... clone resumed>, parent_tid=[2384], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2384
[pid 2382] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2382] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2384 attached
<unfinished ...>
[pid 2383] <... umount2 resumed>) = 0
[pid 2384] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2383] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2384] <... set_robust_list resumed>) = 0
[pid 2383] <... futex resumed>) = 0
[pid 2384] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2383] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2384] <... umount2 resumed>) = 0
[pid 2384] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2382] <... futex resumed>) = 0
[pid 2384] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2382] exit_group(0 <unfinished ...>
[pid 2384] <... futex resumed>) = ?
[pid 2383] <... futex resumed>) = ?
[pid 2382] <... exit_group resumed>) = ?
[pid 2383] +++ exited with 0 +++
[pid 2384] +++ exited with 0 +++
[pid 2382] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2382, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2385
./strace-static-x86_64: Process 2385 attached
[pid 2385] set_robust_list(0x5555560865e0, 24) = 0
[pid 2385] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2385] setpgid(0, 0) = 0
[pid 2385] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2385] write(3, "1000", 4) = 4
[pid 2385] close(3) = 0
[pid 2385] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2385] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2385] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2385] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2386], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2386
./strace-static-x86_64: Process 2386 attached
[pid 2386] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2386] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2385] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2386] <... futex resumed>) = 0
[pid 2386] mkdir("./file0", 000 <unfinished ...>
[pid 2385] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2386] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2386] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2386] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2385] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2385] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2386] <... futex resumed>) = 0
[pid 2385] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2386] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2386] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2386] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2385] <... futex resumed>) = 0
[pid 2385] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2385] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2386] <... futex resumed>) = 0
[pid 2386] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2386] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2385] <... futex resumed>) = 0
[pid 2385] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2385] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2385] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2386] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2385] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2385] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2387], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2387
[pid 2385] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2385] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2387 attached
<unfinished ...>
[pid 2387] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2387] umount2("./file0", MNT_DETACH) = 0
[pid 2387] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2385] <... futex resumed>) = 0
[pid 2387] <... futex resumed>) = 1
[pid 2386] <... umount2 resumed>) = 0
[pid 2387] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2386] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2386] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2385] exit_group(0) = ?
[pid 2387] <... futex resumed>) = ?
[pid 2387] +++ exited with 0 +++
[pid 2386] <... futex resumed>) = ?
[pid 2386] +++ exited with 0 +++
[pid 2385] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2385, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2388
./strace-static-x86_64: Process 2388 attached
[pid 2388] set_robust_list(0x5555560865e0, 24) = 0
[pid 2388] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2388] setpgid(0, 0) = 0
[pid 2388] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2388] write(3, "1000", 4) = 4
[pid 2388] close(3) = 0
[pid 2388] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2388] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2388] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2388] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2389 attached
, parent_tid=[2389], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2389
[pid 2389] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2389] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2388] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2389] <... futex resumed>) = 0
[pid 2389] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2389] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2389] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2388] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2388] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2389] <... futex resumed>) = 0
[pid 2389] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2388] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2389] <... mount resumed>) = 0
[pid 2389] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2388] <... futex resumed>) = 0
[pid 2388] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2388] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2389] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2389] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2388] <... futex resumed>) = 0
[pid 2388] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2388] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2388] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2389] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2388] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2388] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2389] <... umount2 resumed>) = 0
[pid 2388] <... clone resumed>, parent_tid=[2390], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2390
[pid 2388] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2388] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2390 attached
<unfinished ...>
[pid 2390] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2390] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2389] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2389] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2390] <... umount2 resumed>) = 0
[pid 2390] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2388] <... futex resumed>) = 0
[pid 2390] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2388] exit_group(0) = ?
[pid 2390] <... futex resumed>) = ?
[pid 2389] <... futex resumed>) = ?
[pid 2389] +++ exited with 0 +++
[pid 2390] +++ exited with 0 +++
[pid 2388] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2388, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2391
./strace-static-x86_64: Process 2391 attached
[pid 2391] set_robust_list(0x5555560865e0, 24) = 0
[pid 2391] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2391] setpgid(0, 0) = 0
[pid 2391] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2391] write(3, "1000", 4) = 4
[pid 2391] close(3) = 0
[pid 2391] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2391] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2391] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2391] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2392 attached
<unfinished ...>
[pid 2392] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2391] <... clone resumed>, parent_tid=[2392], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2392
[pid 2392] <... set_robust_list resumed>) = 0
[pid 2392] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2391] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2392] <... futex resumed>) = 0
[pid 2392] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2391] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2392] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2391] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2392] <... futex resumed>) = 0
[pid 2391] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2392] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2391] <... futex resumed>) = 0
[pid 2391] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2392] <... mount resumed>) = 0
[pid 2392] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2392] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2391] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2391] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2392] <... futex resumed>) = 0
[pid 2391] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2392] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2392] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2391] <... futex resumed>) = 0
[pid 2391] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2392] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2391] <... futex resumed>) = 0
[pid 2391] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2391] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2392] <... umount2 resumed>) = 0
[pid 2391] <... mmap resumed>) = 0x7f236e446000
[pid 2391] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2392] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2392] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2391] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2393 attached
<unfinished ...>
[pid 2393] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2391] <... clone resumed>, parent_tid=[2393], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2393
[pid 2393] <... set_robust_list resumed>) = 0
[pid 2391] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2393] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2391] <... futex resumed>) = 0
[pid 2391] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2393] <... umount2 resumed>) = 0
[pid 2393] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2391] <... futex resumed>) = 0
[pid 2393] <... futex resumed>) = 1
[pid 2391] exit_group(0 <unfinished ...>
[pid 2393] ????( <unfinished ...>
[pid 2391] <... exit_group resumed>) = ?
[pid 2393] <... ???? resumed>) = ?
[pid 2392] <... futex resumed>) = ?
[pid 2393] +++ exited with 0 +++
[pid 2392] +++ exited with 0 +++
[pid 2391] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2391, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2394
./strace-static-x86_64: Process 2394 attached
[pid 2394] set_robust_list(0x5555560865e0, 24) = 0
[pid 2394] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2394] setpgid(0, 0) = 0
[pid 2394] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2394] write(3, "1000", 4) = 4
[pid 2394] close(3) = 0
[pid 2394] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2394] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2394] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2394] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2395 attached
, parent_tid=[2395], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2395
[pid 2395] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2394] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2395] <... set_robust_list resumed>) = 0
[pid 2394] <... futex resumed>) = 0
[pid 2394] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2395] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2395] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2394] <... futex resumed>) = 0
[pid 2394] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2394] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2395] <... futex resumed>) = 1
[pid 2395] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2395] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2394] <... futex resumed>) = 0
[pid 2395] <... futex resumed>) = 1
[pid 2394] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2395] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2394] <... futex resumed>) = 0
[pid 2394] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2395] <... mount resumed>) = 0
[pid 2395] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2394] <... futex resumed>) = 0
[pid 2395] <... futex resumed>) = 1
[pid 2394] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2395] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2394] <... futex resumed>) = 0
[pid 2394] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2394] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2394] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2394] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2395] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2396 attached
[pid 2395] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2396] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2394] <... clone resumed>, parent_tid=[2396], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2396
[pid 2396] <... set_robust_list resumed>) = 0
[pid 2395] <... futex resumed>) = 0
[pid 2396] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2394] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2395] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2394] <... futex resumed>) = 0
[pid 2394] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2396] <... umount2 resumed>) = 0
[pid 2396] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2394] <... futex resumed>) = 0
[pid 2396] <... futex resumed>) = 1
[pid 2396] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2394] exit_group(0) = ?
[pid 2395] <... futex resumed>) = 231
[pid 2396] <... futex resumed>) = ?
[pid 2395] +++ exited with 0 +++
[pid 2396] +++ exited with 0 +++
[pid 2394] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2394, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2397 attached
, child_tidptr=0x5555560865d0) = 2397
[pid 2397] set_robust_list(0x5555560865e0, 24) = 0
[pid 2397] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2397] setpgid(0, 0) = 0
[pid 2397] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2397] write(3, "1000", 4) = 4
[pid 2397] close(3) = 0
[pid 2397] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2397] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2397] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2397] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2398 attached
, parent_tid=[2398], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2398
[pid 2398] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2397] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2398] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2398] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2398] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2397] <... futex resumed>) = 1
[pid 2398] <... futex resumed>) = 0
[pid 2398] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2397] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2397] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2398] <... futex resumed>) = 0
[pid 2398] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2397] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2398] <... mount resumed>) = 0
[pid 2398] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2398] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2397] <... futex resumed>) = 0
[pid 2397] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2398] <... futex resumed>) = 0
[pid 2397] <... futex resumed>) = 1
[pid 2398] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2397] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2398] <... mount resumed>) = 0
[pid 2398] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2398] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2397] <... futex resumed>) = 0
[pid 2397] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2398] <... futex resumed>) = 0
[pid 2398] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2397] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2398] <... umount2 resumed>) = 0
[pid 2398] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2398] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2397] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2397] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2397] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2399 attached
, parent_tid=[2399], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2399
[pid 2399] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2399] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2397] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2399] <... futex resumed>) = 0
[pid 2399] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2397] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2399] <... umount2 resumed>) = 0
[pid 2399] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2399] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2397] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2397] exit_group(0 <unfinished ...>
[pid 2398] <... futex resumed>) = ?
[pid 2397] <... exit_group resumed>) = ?
[pid 2399] <... futex resumed>) = ?
[pid 2398] +++ exited with 0 +++
[pid 2399] +++ exited with 0 +++
[pid 2397] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2397, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2400
./strace-static-x86_64: Process 2400 attached
[pid 2400] set_robust_list(0x5555560865e0, 24) = 0
[pid 2400] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2400] setpgid(0, 0) = 0
[pid 2400] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2400] write(3, "1000", 4) = 4
[pid 2400] close(3) = 0
[pid 2400] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2400] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2400] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2400] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2401 attached
, parent_tid=[2401], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2401
[pid 2400] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2401] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2400] <... futex resumed>) = 0
[pid 2401] <... set_robust_list resumed>) = 0
[pid 2400] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2401] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2401] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2400] <... futex resumed>) = 0
[pid 2400] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2401] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2400] <... futex resumed>) = 0
[pid 2400] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2401] <... mount resumed>) = 0
[pid 2401] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2400] <... futex resumed>) = 0
[pid 2400] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2400] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2401] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2401] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2401] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2400] <... futex resumed>) = 0
[pid 2400] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2401] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2400] <... futex resumed>) = 0
[pid 2400] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2400] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2400] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2400] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2401] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2400] <... clone resumed>, parent_tid=[2402], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2402
[pid 2400] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2400] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2402 attached
<unfinished ...>
[pid 2402] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2402] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2401] <... umount2 resumed>) = 0
[pid 2401] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2402] <... umount2 resumed>) = 0
[pid 2401] <... futex resumed>) = 0
[pid 2402] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2400] <... futex resumed>) = 0
[pid 2400] exit_group(0) = ?
[pid 2402] <... futex resumed>) = ?
[pid 2402] +++ exited with 0 +++
[pid 2401] +++ exited with 0 +++
[pid 2400] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2400, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2403
./strace-static-x86_64: Process 2403 attached
[pid 2403] set_robust_list(0x5555560865e0, 24) = 0
[pid 2403] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2403] setpgid(0, 0) = 0
[pid 2403] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2403] write(3, "1000", 4) = 4
[pid 2403] close(3) = 0
[pid 2403] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2403] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2403] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2403] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2404], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2404
[pid 2403] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2403] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2404 attached
<unfinished ...>
[pid 2404] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2404] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2404] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2403] <... futex resumed>) = 0
[pid 2403] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2403] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2404] <... futex resumed>) = 1
[pid 2404] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2404] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2403] <... futex resumed>) = 0
[pid 2403] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2403] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2404] <... futex resumed>) = 1
[pid 2404] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2404] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2403] <... futex resumed>) = 0
[pid 2403] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2403] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2403] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2403] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2403] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2405], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2405
[pid 2403] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2403] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2404] <... futex resumed>) = 1
[pid 2404] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 2405 attached
) = 0
[pid 2404] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2404] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2405] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2405] umount2("./file0", MNT_DETACH) = 0
[pid 2405] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2403] <... futex resumed>) = 0
[pid 2403] exit_group(0) = ?
[pid 2404] <... futex resumed>) = ?
[pid 2404] +++ exited with 0 +++
[pid 2405] <... futex resumed>) = ?
[pid 2405] +++ exited with 0 +++
[pid 2403] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2403, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2406 attached
, child_tidptr=0x5555560865d0) = 2406
[pid 2406] set_robust_list(0x5555560865e0, 24) = 0
[pid 2406] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2406] setpgid(0, 0) = 0
[pid 2406] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2406] write(3, "1000", 4) = 4
[pid 2406] close(3) = 0
[pid 2406] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2406] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2406] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2406] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2407], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2407
[pid 2406] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2406] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2407 attached
<unfinished ...>
[pid 2407] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2407] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2407] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2406] <... futex resumed>) = 0
[pid 2406] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2406] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2407] <... futex resumed>) = 1
[pid 2407] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2407] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2406] <... futex resumed>) = 0
[pid 2406] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2406] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2407] <... futex resumed>) = 1
[pid 2407] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2407] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2406] <... futex resumed>) = 0
[pid 2406] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2406] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2406] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2406] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2406] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2408], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2408
[pid 2406] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2406] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2407] <... futex resumed>) = 1
[pid 2407] umount2("./file0", MNT_DETACH) = 0
[pid 2407] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2407] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2408 attached
<unfinished ...>
[pid 2408] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2408] umount2("./file0", MNT_DETACH) = 0
[pid 2408] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2406] <... futex resumed>) = 0
[pid 2406] exit_group(0) = ?
[pid 2407] <... futex resumed>) = ?
[pid 2407] +++ exited with 0 +++
[pid 2408] <... futex resumed>) = ?
[pid 2408] +++ exited with 0 +++
[pid 2406] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2406, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2409
./strace-static-x86_64: Process 2409 attached
[pid 2409] set_robust_list(0x5555560865e0, 24) = 0
[pid 2409] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2409] setpgid(0, 0) = 0
[pid 2409] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2409] write(3, "1000", 4) = 4
[pid 2409] close(3) = 0
[pid 2409] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2409] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2409] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2409] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2410], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2410
[pid 2409] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2409] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2410 attached
<unfinished ...>
[pid 2410] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2410] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2410] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2409] <... futex resumed>) = 0
[pid 2409] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2409] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2410] <... futex resumed>) = 1
[pid 2410] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2410] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2409] <... futex resumed>) = 0
[pid 2409] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2409] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2410] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2410] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2409] <... futex resumed>) = 0
[pid 2409] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2409] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2409] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2409] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2410] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2409] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2410] <... umount2 resumed>) = 0
[pid 2409] <... clone resumed>, parent_tid=[2411], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2411
[pid 2409] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2410] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2409] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2410] <... futex resumed>) = 0
./strace-static-x86_64: Process 2411 attached
[pid 2410] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2411] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2411] umount2("./file0", MNT_DETACH) = 0
[pid 2411] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2409] <... futex resumed>) = 0
[pid 2409] exit_group(0) = ?
[pid 2410] <... futex resumed>) = ?
[pid 2411] <... futex resumed>) = ?
[pid 2411] +++ exited with 0 +++
[pid 2410] +++ exited with 0 +++
[pid 2409] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2409, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2412
./strace-static-x86_64: Process 2412 attached
[pid 2412] set_robust_list(0x5555560865e0, 24) = 0
[pid 2412] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2412] setpgid(0, 0) = 0
[pid 2412] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2412] write(3, "1000", 4) = 4
[pid 2412] close(3) = 0
[pid 2412] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2412] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2412] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2412] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2413 attached
<unfinished ...>
[pid 2413] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2412] <... clone resumed>, parent_tid=[2413], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2413
[pid 2413] <... set_robust_list resumed>) = 0
[pid 2412] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2412] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2413] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2413] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2412] <... futex resumed>) = 0
[pid 2412] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2412] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2413] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2413] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2413] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2412] <... futex resumed>) = 0
[pid 2412] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2412] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2413] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2413] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2413] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2412] <... futex resumed>) = 0
[pid 2413] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2412] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2413] <... futex resumed>) = 0
[pid 2413] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2412] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2413] <... umount2 resumed>) = 0
[pid 2413] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2413] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2412] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2412] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2412] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2414 attached
<unfinished ...>
[pid 2414] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2414] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2412] <... clone resumed>, parent_tid=[2414], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2414
[pid 2412] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2414] <... futex resumed>) = 0
[pid 2414] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2412] <... futex resumed>) = 1
[pid 2414] <... umount2 resumed>) = 0
[pid 2414] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2414] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2412] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2412] exit_group(0 <unfinished ...>
[pid 2413] <... futex resumed>) = ?
[pid 2412] <... exit_group resumed>) = ?
[pid 2413] +++ exited with 0 +++
[pid 2414] <... futex resumed>) = ?
[pid 2414] +++ exited with 0 +++
[pid 2412] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2412, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2415
./strace-static-x86_64: Process 2415 attached
[pid 2415] set_robust_list(0x5555560865e0, 24) = 0
[pid 2415] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2415] setpgid(0, 0) = 0
[pid 2415] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2415] write(3, "1000", 4) = 4
[pid 2415] close(3) = 0
[pid 2415] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2415] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2415] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2415] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2416], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2416
[pid 2415] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2415] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2416 attached
<unfinished ...>
[pid 2416] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2416] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2416] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2415] <... futex resumed>) = 0
[pid 2415] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2415] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2416] <... futex resumed>) = 1
[pid 2416] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2416] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2415] <... futex resumed>) = 0
[pid 2415] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2415] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2416] <... futex resumed>) = 1
[pid 2416] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2416] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2415] <... futex resumed>) = 0
[pid 2415] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2415] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2415] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2415] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2415] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2417], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2417
[pid 2415] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2415] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2416] <... futex resumed>) = 1
[pid 2416] umount2("./file0", MNT_DETACH) = 0
[pid 2416] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2416] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2417 attached
<unfinished ...>
[pid 2417] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2417] umount2("./file0", MNT_DETACH) = 0
[pid 2417] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2415] <... futex resumed>) = 0
[pid 2415] exit_group(0 <unfinished ...>
[pid 2416] <... futex resumed>) = ?
[pid 2415] <... exit_group resumed>) = ?
[pid 2416] +++ exited with 0 +++
[pid 2417] +++ exited with 0 +++
[pid 2415] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2415, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2418
./strace-static-x86_64: Process 2418 attached
[pid 2418] set_robust_list(0x5555560865e0, 24) = 0
[pid 2418] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2418] setpgid(0, 0) = 0
[pid 2418] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2418] write(3, "1000", 4) = 4
[pid 2418] close(3) = 0
[pid 2418] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2418] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2418] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2418] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2419], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2419
[pid 2418] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2418] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2419 attached
<unfinished ...>
[pid 2419] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2419] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2419] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2418] <... futex resumed>) = 0
[pid 2419] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2418] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2418] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2419] <... mount resumed>) = 0
[pid 2419] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2418] <... futex resumed>) = 0
[pid 2418] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2419] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2418] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2419] <... mount resumed>) = 0
[pid 2419] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2418] <... futex resumed>) = 0
[pid 2418] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2418] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2418] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2418] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2418] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2419] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2418] <... clone resumed>, parent_tid=[2420], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2420
[pid 2418] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2418] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2420 attached
<unfinished ...>
[pid 2420] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2419] <... umount2 resumed>) = 0
[pid 2420] umount2("./file0", MNT_DETACH) = 0
[pid 2419] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2420] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2418] <... futex resumed>) = 0
[pid 2418] exit_group(0) = ?
[pid 2420] <... futex resumed>) = ?
[pid 2420] +++ exited with 0 +++
[pid 2419] <... futex resumed>) = ?
[pid 2419] +++ exited with 0 +++
[pid 2418] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2418, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2421
./strace-static-x86_64: Process 2421 attached
[pid 2421] set_robust_list(0x5555560865e0, 24) = 0
[pid 2421] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2421] setpgid(0, 0) = 0
[pid 2421] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2421] write(3, "1000", 4) = 4
[pid 2421] close(3) = 0
[pid 2421] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2421] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2421] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2421] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2422 attached
, parent_tid=[2422], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2422
[pid 2422] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2421] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2422] <... set_robust_list resumed>) = 0
[pid 2421] <... futex resumed>) = 0
[pid 2421] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2422] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2422] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2421] <... futex resumed>) = 0
[pid 2422] <... futex resumed>) = 1
[pid 2421] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2422] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2421] <... futex resumed>) = 0
[pid 2421] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2422] <... mount resumed>) = 0
[pid 2422] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2421] <... futex resumed>) = 0
[pid 2422] <... futex resumed>) = 1
[pid 2421] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2422] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2421] <... futex resumed>) = 0
[pid 2421] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2422] <... mount resumed>) = 0
[pid 2422] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2421] <... futex resumed>) = 0
[pid 2422] <... futex resumed>) = 1
[pid 2421] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2422] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2421] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2421] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2421] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2421] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2422] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2423 attached
[pid 2422] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2421] <... clone resumed>, parent_tid=[2423], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2423
[pid 2423] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2422] <... futex resumed>) = 0
[pid 2421] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2422] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2421] <... futex resumed>) = 0
[pid 2421] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2423] <... set_robust_list resumed>) = 0
[pid 2423] umount2("./file0", MNT_DETACH) = 0
[pid 2423] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2421] <... futex resumed>) = 0
[pid 2421] exit_group(0) = ?
[pid 2423] <... futex resumed>) = ?
[pid 2422] <... futex resumed>) = ?
[pid 2423] +++ exited with 0 +++
[pid 2422] +++ exited with 0 +++
[pid 2421] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2421, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2424
./strace-static-x86_64: Process 2424 attached
[pid 2424] set_robust_list(0x5555560865e0, 24) = 0
[pid 2424] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2424] setpgid(0, 0) = 0
[pid 2424] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2424] write(3, "1000", 4) = 4
[pid 2424] close(3) = 0
[pid 2424] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2424] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2424] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2424] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2425], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2425
[pid 2424] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2424] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2425 attached
<unfinished ...>
[pid 2425] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2425] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2425] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2424] <... futex resumed>) = 0
[pid 2424] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2424] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2425] <... futex resumed>) = 1
[pid 2425] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2425] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2424] <... futex resumed>) = 0
[pid 2424] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2424] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2425] <... futex resumed>) = 1
[pid 2425] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2425] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2424] <... futex resumed>) = 0
[pid 2424] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2424] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2424] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2424] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2424] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2426], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2426
./strace-static-x86_64: Process 2426 attached
[pid 2426] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2424] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2424] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2425] <... futex resumed>) = 1
[pid 2425] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2426] <... set_robust_list resumed>) = 0
[pid 2426] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2425] <... umount2 resumed>) = 0
[pid 2425] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2425] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2426] <... umount2 resumed>) = 0
[pid 2426] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2424] <... futex resumed>) = 0
[pid 2424] exit_group(0) = ?
[pid 2425] <... futex resumed>) = ?
[pid 2426] +++ exited with 0 +++
[pid 2425] +++ exited with 0 +++
[pid 2424] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2424, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2427
./strace-static-x86_64: Process 2427 attached
[pid 2427] set_robust_list(0x5555560865e0, 24) = 0
[pid 2427] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2427] setpgid(0, 0) = 0
[pid 2427] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2427] write(3, "1000", 4) = 4
[pid 2427] close(3) = 0
[pid 2427] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2427] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2427] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2427] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2428 attached
, parent_tid=[2428], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2428
[pid 2428] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2427] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2427] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2428] <... set_robust_list resumed>) = 0
[pid 2428] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2428] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2427] <... futex resumed>) = 0
[pid 2427] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2427] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2428] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2428] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2427] <... futex resumed>) = 0
[pid 2427] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2427] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2428] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2428] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2428] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2427] <... futex resumed>) = 0
[pid 2427] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2427] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2427] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2427] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2428] <... futex resumed>) = 0
[pid 2427] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2429 attached
<unfinished ...>
[pid 2428] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2427] <... clone resumed>, parent_tid=[2429], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2429
[pid 2428] <... umount2 resumed>) = 0
[pid 2427] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2427] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2428] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2428] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2429] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2429] umount2("./file0", MNT_DETACH) = 0
[pid 2429] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2429] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2427] <... futex resumed>) = 0
[pid 2427] exit_group(0 <unfinished ...>
[pid 2428] <... futex resumed>) = ?
[pid 2428] +++ exited with 0 +++
[pid 2429] <... futex resumed>) = ?
[pid 2429] +++ exited with 0 +++
[pid 2427] <... exit_group resumed>) = ?
[pid 2427] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2427, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2430
./strace-static-x86_64: Process 2430 attached
[pid 2430] set_robust_list(0x5555560865e0, 24) = 0
[pid 2430] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2430] setpgid(0, 0) = 0
[pid 2430] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2430] write(3, "1000", 4) = 4
[pid 2430] close(3) = 0
[pid 2430] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2430] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2430] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2430] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2431 attached
, parent_tid=[2431], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2431
[pid 2430] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2431] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2430] <... futex resumed>) = 0
[pid 2431] <... set_robust_list resumed>) = 0
[pid 2430] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2431] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2431] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2430] <... futex resumed>) = 0
[pid 2431] <... futex resumed>) = 1
[pid 2430] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2431] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2430] <... futex resumed>) = 0
[pid 2430] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2431] <... mount resumed>) = 0
[pid 2431] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2430] <... futex resumed>) = 0
[pid 2431] <... futex resumed>) = 1
[pid 2431] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2430] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2430] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2431] <... mount resumed>) = 0
[pid 2431] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2430] <... futex resumed>) = 0
[pid 2431] <... futex resumed>) = 1
[pid 2430] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2431] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2430] <... futex resumed>) = 0
[pid 2430] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2431] <... umount2 resumed>) = 0
[pid 2430] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2430] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2430] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2432 attached
, parent_tid=[2432], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2432
[pid 2432] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2430] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2430] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2432] <... set_robust_list resumed>) = 0
[pid 2432] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2431] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2432] <... umount2 resumed>) = 0
[pid 2432] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2430] <... futex resumed>) = 0
[pid 2430] exit_group(0 <unfinished ...>
[pid 2432] ????( <unfinished ...>
[pid 2430] <... exit_group resumed>) = ?
[pid 2432] <... ???? resumed>) = ?
[pid 2432] +++ exited with 0 +++
[pid 2431] <... futex resumed>) = ?
[pid 2431] +++ exited with 0 +++
[pid 2430] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2430, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2433
./strace-static-x86_64: Process 2433 attached
[pid 2433] set_robust_list(0x5555560865e0, 24) = 0
[pid 2433] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2433] setpgid(0, 0) = 0
[pid 2433] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2433] write(3, "1000", 4) = 4
[pid 2433] close(3) = 0
[pid 2433] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2433] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2433] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2433] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2434 attached
, parent_tid=[2434], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2434
[pid 2434] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2434] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2433] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2434] <... futex resumed>) = 0
[pid 2434] mkdir("./file0", 000 <unfinished ...>
[pid 2433] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2434] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2434] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2434] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2433] <... futex resumed>) = 0
[pid 2433] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2434] <... futex resumed>) = 0
[pid 2434] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2433] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2434] <... mount resumed>) = 0
[pid 2434] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2433] <... futex resumed>) = 0
[pid 2434] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2433] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2434] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2433] <... futex resumed>) = 0
[pid 2434] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2433] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2434] <... mount resumed>) = 0
[pid 2434] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2434] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2433] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2433] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2434] <... futex resumed>) = 0
[pid 2433] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2434] umount2("./file0", MNT_DETACH) = 0
[pid 2433] <... futex resumed>) = 0
[pid 2434] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2433] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2434] <... futex resumed>) = 0
[pid 2433] <... mmap resumed>) = 0x7f236e446000
[pid 2434] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2433] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2433] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2435 attached
<unfinished ...>
[pid 2435] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2433] <... clone resumed>, parent_tid=[2435], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2435
[pid 2435] <... set_robust_list resumed>) = 0
[pid 2433] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2435] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2433] <... futex resumed>) = 0
[pid 2433] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2435] <... umount2 resumed>) = 0
[pid 2435] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2433] <... futex resumed>) = 0
[pid 2435] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2433] exit_group(0) = ?
[pid 2434] <... futex resumed>) = ?
[pid 2434] +++ exited with 0 +++
[pid 2435] <... futex resumed>) = ?
[pid 2435] +++ exited with 0 +++
[pid 2433] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2433, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2436
./strace-static-x86_64: Process 2436 attached
[pid 2436] set_robust_list(0x5555560865e0, 24) = 0
[pid 2436] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2436] setpgid(0, 0) = 0
[pid 2436] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2436] write(3, "1000", 4) = 4
[pid 2436] close(3) = 0
[pid 2436] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2436] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2436] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2436] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2437], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2437
[pid 2436] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2436] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2437 attached
<unfinished ...>
[pid 2437] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2437] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2437] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2436] <... futex resumed>) = 0
[pid 2436] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2436] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2437] <... futex resumed>) = 1
[pid 2437] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2437] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2436] <... futex resumed>) = 0
[pid 2436] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2436] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2437] <... futex resumed>) = 1
[pid 2437] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2437] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2436] <... futex resumed>) = 0
[pid 2436] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2436] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2436] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2436] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2436] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2438 attached
<unfinished ...>
[pid 2437] <... futex resumed>) = 1
[pid 2436] <... clone resumed>, parent_tid=[2438], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2438
[pid 2438] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2437] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2438] <... set_robust_list resumed>) = 0
[pid 2436] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2436] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2437] <... umount2 resumed>) = 0
[pid 2438] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2437] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2437] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2438] <... umount2 resumed>) = 0
[pid 2438] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2436] <... futex resumed>) = 0
[pid 2438] <... futex resumed>) = 1
[pid 2436] exit_group(0 <unfinished ...>
[pid 2438] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2436] <... exit_group resumed>) = ?
[pid 2437] <... futex resumed>) = ?
[pid 2438] <... futex resumed>) = ?
[pid 2437] +++ exited with 0 +++
[pid 2438] +++ exited with 0 +++
[pid 2436] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2436, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2439
./strace-static-x86_64: Process 2439 attached
[pid 2439] set_robust_list(0x5555560865e0, 24) = 0
[pid 2439] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2439] setpgid(0, 0) = 0
[pid 2439] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2439] write(3, "1000", 4) = 4
[pid 2439] close(3) = 0
[pid 2439] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2439] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2439] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2439] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2440 attached
<unfinished ...>
[pid 2440] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2440] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2439] <... clone resumed>, parent_tid=[2440], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2440
[pid 2439] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2440] <... futex resumed>) = 0
[pid 2440] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2439] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2440] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2440] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2439] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2439] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2440] <... futex resumed>) = 0
[pid 2440] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2439] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2440] <... mount resumed>) = 0
[pid 2440] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2440] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2439] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2439] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2440] <... futex resumed>) = 0
[pid 2440] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2439] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2440] <... mount resumed>) = 0
[pid 2440] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2439] <... futex resumed>) = 0
[pid 2439] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2440] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2439] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2439] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2439] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2439] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2441], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2441
[pid 2439] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2440] <... umount2 resumed>) = 0
[pid 2439] <... futex resumed>) = 0
[pid 2439] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2441 attached
<unfinished ...>
[pid 2441] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2441] umount2("./file0", MNT_DETACH) = 0
[pid 2440] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2441] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2439] <... futex resumed>) = 0
[pid 2439] exit_group(0) = ?
[pid 2440] <... futex resumed>) = ?
[pid 2441] <... futex resumed>) = ?
[pid 2441] +++ exited with 0 +++
[pid 2440] +++ exited with 0 +++
[pid 2439] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2439, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2442
./strace-static-x86_64: Process 2442 attached
[pid 2442] set_robust_list(0x5555560865e0, 24) = 0
[pid 2442] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2442] setpgid(0, 0) = 0
[pid 2442] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2442] write(3, "1000", 4) = 4
[pid 2442] close(3) = 0
[pid 2442] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2442] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2442] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2442] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2443 attached
, parent_tid=[2443], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2443
[pid 2443] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2442] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2443] <... set_robust_list resumed>) = 0
[pid 2442] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2443] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2443] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2442] <... futex resumed>) = 0
[pid 2442] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2442] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2443] <... futex resumed>) = 1
[pid 2443] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2443] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2442] <... futex resumed>) = 0
[pid 2442] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2442] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2443] <... futex resumed>) = 1
[pid 2443] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2443] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2442] <... futex resumed>) = 0
[pid 2442] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2442] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2442] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2442] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2442] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2444 attached
, parent_tid=[2444], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2444
[pid 2442] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2442] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2443] <... futex resumed>) = 1
[pid 2443] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2444] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2444] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2443] <... umount2 resumed>) = 0
[pid 2444] <... umount2 resumed>) = 0
[pid 2443] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2443] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2444] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2442] <... futex resumed>) = 0
[pid 2442] exit_group(0) = ?
[pid 2443] <... futex resumed>) = ?
[pid 2443] +++ exited with 0 +++
[pid 2444] +++ exited with 0 +++
[pid 2442] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2442, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2445
./strace-static-x86_64: Process 2445 attached
[pid 2445] set_robust_list(0x5555560865e0, 24) = 0
[pid 2445] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2445] setpgid(0, 0) = 0
[pid 2445] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2445] write(3, "1000", 4) = 4
[pid 2445] close(3) = 0
[pid 2445] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2445] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2445] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2445] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2446 attached
<unfinished ...>
[pid 2446] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2446] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2445] <... clone resumed>, parent_tid=[2446], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2446
[pid 2445] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2446] <... futex resumed>) = 0
[pid 2446] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2445] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2446] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2446] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2445] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2445] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2446] <... futex resumed>) = 0
[pid 2445] <... futex resumed>) = 1
[pid 2446] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2445] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2446] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2446] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2445] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2445] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2446] <... futex resumed>) = 0
[pid 2445] <... futex resumed>) = 1
[pid 2446] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2445] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2446] <... mount resumed>) = 0
[pid 2446] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2446] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2445] <... futex resumed>) = 0
[pid 2445] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2446] <... futex resumed>) = 0
[pid 2445] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2446] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2445] <... futex resumed>) = 0
[pid 2445] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2446] <... umount2 resumed>) = 0
[pid 2445] <... mmap resumed>) = 0x7f236e446000
[pid 2446] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2446] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2445] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2445] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2447 attached
<unfinished ...>
[pid 2447] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2447] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2445] <... clone resumed>, parent_tid=[2447], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2447
[pid 2445] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2447] <... futex resumed>) = 0
[pid 2445] <... futex resumed>) = 1
[pid 2447] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2445] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2447] <... umount2 resumed>) = 0
[pid 2447] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2445] <... futex resumed>) = 0
[pid 2447] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2445] exit_group(0) = ?
[pid 2446] <... futex resumed>) = ?
[pid 2446] +++ exited with 0 +++
[pid 2447] <... futex resumed>) = ?
[pid 2447] +++ exited with 0 +++
[pid 2445] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2445, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2448
./strace-static-x86_64: Process 2448 attached
[pid 2448] set_robust_list(0x5555560865e0, 24) = 0
[pid 2448] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2448] setpgid(0, 0) = 0
[pid 2448] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2448] write(3, "1000", 4) = 4
[pid 2448] close(3) = 0
[pid 2448] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2448] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2448] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2448] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2449 attached
<unfinished ...>
[pid 2449] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2448] <... clone resumed>, parent_tid=[2449], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2449
[pid 2449] <... set_robust_list resumed>) = 0
[pid 2448] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2448] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2449] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2449] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2448] <... futex resumed>) = 0
[pid 2449] <... futex resumed>) = 1
[pid 2448] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2449] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2448] <... futex resumed>) = 0
[pid 2448] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2449] <... mount resumed>) = 0
[pid 2449] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2448] <... futex resumed>) = 0
[pid 2449] <... futex resumed>) = 1
[pid 2448] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2449] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2448] <... futex resumed>) = 0
[pid 2448] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2449] <... mount resumed>) = 0
[pid 2449] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2448] <... futex resumed>) = 0
[pid 2449] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2448] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2448] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2448] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2448] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2448] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2450 attached
<unfinished ...>
[pid 2449] <... umount2 resumed>) = 0
[pid 2450] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2449] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2448] <... clone resumed>, parent_tid=[2450], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2450
[pid 2450] <... set_robust_list resumed>) = 0
[pid 2449] <... futex resumed>) = 0
[pid 2448] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2450] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2448] <... futex resumed>) = 0
[pid 2449] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2448] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2450] <... umount2 resumed>) = 0
[pid 2450] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2448] <... futex resumed>) = 0
[pid 2450] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2448] exit_group(0) = ?
[pid 2449] <... futex resumed>) = ?
[pid 2450] <... futex resumed>) = ?
[pid 2449] +++ exited with 0 +++
[pid 2450] +++ exited with 0 +++
[pid 2448] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2448, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2451
./strace-static-x86_64: Process 2451 attached
[pid 2451] set_robust_list(0x5555560865e0, 24) = 0
[pid 2451] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2451] setpgid(0, 0) = 0
[pid 2451] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2451] write(3, "1000", 4) = 4
[pid 2451] close(3) = 0
[pid 2451] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2451] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2451] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2451] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2452 attached
, parent_tid=[2452], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2452
[pid 2452] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2451] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2452] <... set_robust_list resumed>) = 0
[pid 2451] <... futex resumed>) = 0
[pid 2451] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2452] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2452] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2451] <... futex resumed>) = 0
[pid 2452] <... futex resumed>) = 1
[pid 2451] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2452] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2451] <... futex resumed>) = 0
[pid 2451] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2452] <... mount resumed>) = 0
[pid 2452] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2451] <... futex resumed>) = 0
[pid 2452] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2451] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2452] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2451] <... futex resumed>) = 0
[pid 2451] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2452] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2452] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2451] <... futex resumed>) = 0
[pid 2451] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2452] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2451] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2451] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2451] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2452] <... umount2 resumed>) = 0
[pid 2451] <... mprotect resumed>) = 0
[pid 2451] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2452] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2453 attached
<unfinished ...>
[pid 2451] <... clone resumed>, parent_tid=[2453], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2453
[pid 2451] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2451] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2453] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2452] <... futex resumed>) = 0
[pid 2453] <... set_robust_list resumed>) = 0
[pid 2452] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2453] umount2("./file0", MNT_DETACH) = 0
[pid 2453] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2451] <... futex resumed>) = 0
[pid 2453] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2451] exit_group(0 <unfinished ...>
[pid 2452] <... futex resumed>) = ?
[pid 2451] <... exit_group resumed>) = ?
[pid 2452] +++ exited with 0 +++
[pid 2453] <... futex resumed>) = ?
[pid 2453] +++ exited with 0 +++
[pid 2451] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2451, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2454
./strace-static-x86_64: Process 2454 attached
[pid 2454] set_robust_list(0x5555560865e0, 24) = 0
[pid 2454] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2454] setpgid(0, 0) = 0
[pid 2454] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2454] write(3, "1000", 4) = 4
[pid 2454] close(3) = 0
[pid 2454] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2454] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2454] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2454] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2455 attached
, parent_tid=[2455], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2455
[pid 2455] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2454] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2454] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2455] <... set_robust_list resumed>) = 0
[pid 2455] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2455] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2454] <... futex resumed>) = 0
[pid 2454] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2454] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2455] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2455] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2454] <... futex resumed>) = 0
[pid 2454] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2454] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2455] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2455] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2454] <... futex resumed>) = 0
[pid 2454] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2454] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2454] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2454] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2454] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2456 attached
, parent_tid=[2456], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2456
[pid 2454] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2454] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2456] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2456] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2455] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2456] <... umount2 resumed>) = 0
[pid 2456] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2456] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2454] <... futex resumed>) = 0
[pid 2455] <... umount2 resumed>) = 0
[pid 2455] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2455] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2454] exit_group(0) = ?
[pid 2455] <... futex resumed>) = ?
[pid 2456] <... futex resumed>) = ?
[pid 2455] +++ exited with 0 +++
[pid 2456] +++ exited with 0 +++
[pid 2454] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2454, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2457
./strace-static-x86_64: Process 2457 attached
[pid 2457] set_robust_list(0x5555560865e0, 24) = 0
[pid 2457] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2457] setpgid(0, 0) = 0
[pid 2457] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2457] write(3, "1000", 4) = 4
[pid 2457] close(3) = 0
[pid 2457] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2457] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2457] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2457] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2458], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2458
[pid 2457] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2457] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2458 attached
<unfinished ...>
[pid 2458] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2458] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2458] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2457] <... futex resumed>) = 0
[pid 2457] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2457] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2458] <... futex resumed>) = 1
[pid 2458] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2458] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2457] <... futex resumed>) = 0
[pid 2458] <... futex resumed>) = 1
[pid 2457] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2458] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2457] <... futex resumed>) = 0
[pid 2457] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2458] <... mount resumed>) = 0
[pid 2458] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2457] <... futex resumed>) = 0
[pid 2458] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2457] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2458] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2457] <... futex resumed>) = 0
[pid 2458] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2457] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2457] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2457] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2457] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2458] <... umount2 resumed>) = 0
[pid 2458] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2459 attached
) = 0
[pid 2457] <... clone resumed>, parent_tid=[2459], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2459
[pid 2459] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2458] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2457] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2459] <... set_robust_list resumed>) = 0
[pid 2457] <... futex resumed>) = 0
[pid 2459] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2457] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2459] <... umount2 resumed>) = 0
[pid 2459] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2457] <... futex resumed>) = 0
[pid 2459] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2457] exit_group(0) = ?
[pid 2458] <... futex resumed>) = 231
[pid 2459] <... futex resumed>) = ?
[pid 2458] +++ exited with 0 +++
[pid 2459] +++ exited with 0 +++
[pid 2457] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2457, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2460
./strace-static-x86_64: Process 2460 attached
[pid 2460] set_robust_list(0x5555560865e0, 24) = 0
[pid 2460] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2460] setpgid(0, 0) = 0
[pid 2460] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2460] write(3, "1000", 4) = 4
[pid 2460] close(3) = 0
[pid 2460] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2460] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2460] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2460] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2461 attached
, parent_tid=[2461], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2461
[pid 2461] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2460] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2461] <... set_robust_list resumed>) = 0
[pid 2461] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2461] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2461] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2460] <... futex resumed>) = 1
[pid 2461] <... futex resumed>) = 0
[pid 2461] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2460] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2460] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2461] <... futex resumed>) = 0
[pid 2460] <... futex resumed>) = 1
[pid 2461] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2460] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2461] <... mount resumed>) = 0
[pid 2461] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2461] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2460] <... futex resumed>) = 0
[pid 2460] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2461] <... futex resumed>) = 0
[pid 2460] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2461] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2461] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2460] <... futex resumed>) = 0
[pid 2461] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2460] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2460] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2460] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2460] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2460] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2461] <... umount2 resumed>) = 0
[pid 2461] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2461] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2460] <... clone resumed>, parent_tid=[2462], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2462
./strace-static-x86_64: Process 2462 attached
[pid 2460] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2462] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2460] <... futex resumed>) = 0
[pid 2462] <... set_robust_list resumed>) = 0
[pid 2460] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2462] umount2("./file0", MNT_DETACH) = 0
[pid 2462] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2462] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2460] <... futex resumed>) = 0
[pid 2460] exit_group(0) = ?
[pid 2461] <... futex resumed>) = 231
[pid 2462] <... futex resumed>) = ?
[pid 2461] +++ exited with 0 +++
[pid 2462] +++ exited with 0 +++
[pid 2460] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2460, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2463
./strace-static-x86_64: Process 2463 attached
[pid 2463] set_robust_list(0x5555560865e0, 24) = 0
[pid 2463] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2463] setpgid(0, 0) = 0
[pid 2463] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2463] write(3, "1000", 4) = 4
[pid 2463] close(3) = 0
[pid 2463] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2463] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2463] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2463] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2464 attached
, parent_tid=[2464], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2464
[pid 2464] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2463] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2464] <... set_robust_list resumed>) = 0
[pid 2463] <... futex resumed>) = 0
[pid 2463] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2464] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2464] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2463] <... futex resumed>) = 0
[pid 2464] <... futex resumed>) = 1
[pid 2463] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2464] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2463] <... futex resumed>) = 0
[pid 2463] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2464] <... mount resumed>) = 0
[pid 2464] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2463] <... futex resumed>) = 0
[pid 2463] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2464] <... futex resumed>) = 1
[pid 2463] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2464] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2464] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2463] <... futex resumed>) = 0
[pid 2463] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2463] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2463] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2463] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2463] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2464] umount2("./file0", MNT_DETACH) = 0
[pid 2464] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2463] <... clone resumed>, parent_tid=[2465], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2465
[pid 2464] <... futex resumed>) = 0
[pid 2463] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2463] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2465 attached
<unfinished ...>
[pid 2465] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2465] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2464] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2465] <... umount2 resumed>) = 0
[pid 2465] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2463] <... futex resumed>) = 0
[pid 2465] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2463] exit_group(0 <unfinished ...>
[pid 2465] <... futex resumed>) = 230
[pid 2464] <... futex resumed>) = ?
[pid 2463] <... exit_group resumed>) = ?
[pid 2464] +++ exited with 0 +++
[pid 2465] +++ exited with 0 +++
[pid 2463] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2463, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2466
./strace-static-x86_64: Process 2466 attached
[pid 2466] set_robust_list(0x5555560865e0, 24) = 0
[pid 2466] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2466] setpgid(0, 0) = 0
[pid 2466] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2466] write(3, "1000", 4) = 4
[pid 2466] close(3) = 0
[pid 2466] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2466] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2466] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2466] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2467 attached
, parent_tid=[2467], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2467
[pid 2467] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2466] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2467] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2467] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2467] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2466] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2466] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2467] <... futex resumed>) = 0
[pid 2466] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2467] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2467] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2466] <... futex resumed>) = 0
[pid 2467] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2466] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2467] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2466] <... futex resumed>) = 0
[pid 2467] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2466] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2467] <... mount resumed>) = 0
[pid 2467] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2466] <... futex resumed>) = 0
[pid 2467] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2466] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2467] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2466] <... futex resumed>) = 0
[pid 2467] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2466] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2467] <... umount2 resumed>) = 0
[pid 2466] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2467] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2466] <... mmap resumed>) = 0x7f236e446000
[pid 2467] <... futex resumed>) = 0
[pid 2466] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2467] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2466] <... mprotect resumed>) = 0
[pid 2466] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2468 attached
, parent_tid=[2468], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2468
[pid 2468] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2466] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2468] <... set_robust_list resumed>) = 0
[pid 2466] <... futex resumed>) = 0
[pid 2468] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2466] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2468] <... umount2 resumed>) = 0
[pid 2468] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2466] <... futex resumed>) = 0
[pid 2468] <... futex resumed>) = 1
[pid 2466] exit_group(0 <unfinished ...>
[pid 2468] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2466] <... exit_group resumed>) = ?
[pid 2467] <... futex resumed>) = -1 (errno 18446744073709551414)
[pid 2468] <... futex resumed>) = ?
[pid 2467] +++ exited with 0 +++
[pid 2468] +++ exited with 0 +++
[pid 2466] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2466, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2469
./strace-static-x86_64: Process 2469 attached
[pid 2469] set_robust_list(0x5555560865e0, 24) = 0
[pid 2469] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2469] setpgid(0, 0) = 0
[pid 2469] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2469] write(3, "1000", 4) = 4
[pid 2469] close(3) = 0
[pid 2469] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2469] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2469] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2469] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2470 attached
, parent_tid=[2470], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2470
[pid 2470] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2469] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2470] <... set_robust_list resumed>) = 0
[pid 2470] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2470] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2470] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2469] <... futex resumed>) = 1
[pid 2470] <... futex resumed>) = 0
[pid 2469] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2470] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2469] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2470] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2469] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2470] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2469] <... futex resumed>) = 0
[pid 2469] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2470] <... mount resumed>) = 0
[pid 2470] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2469] <... futex resumed>) = 0
[pid 2470] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2469] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2470] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2469] <... futex resumed>) = 0
[pid 2470] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2469] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2470] <... mount resumed>) = 0
[pid 2470] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2469] <... futex resumed>) = 0
[pid 2470] <... futex resumed>) = 1
[pid 2469] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2470] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2469] <... futex resumed>) = 0
[pid 2469] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2469] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2469] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2470] <... umount2 resumed>) = 0
[pid 2470] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2469] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2470] <... futex resumed>) = 0
[pid 2470] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2471 attached
<unfinished ...>
[pid 2469] <... clone resumed>, parent_tid=[2471], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2471
[pid 2469] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2471] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2469] <... futex resumed>) = 0
[pid 2471] <... set_robust_list resumed>) = 0
[pid 2469] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2471] umount2("./file0", MNT_DETACH) = 0
[pid 2471] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2469] <... futex resumed>) = 0
[pid 2471] <... futex resumed>) = 1
[pid 2469] exit_group(0 <unfinished ...>
[pid 2471] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2469] <... exit_group resumed>) = ?
[pid 2470] <... futex resumed>) = -1 (errno 18446744073709551414)
[pid 2471] <... futex resumed>) = ?
[pid 2470] +++ exited with 0 +++
[pid 2471] +++ exited with 0 +++
[pid 2469] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2469, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2472
./strace-static-x86_64: Process 2472 attached
[pid 2472] set_robust_list(0x5555560865e0, 24) = 0
[pid 2472] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2472] setpgid(0, 0) = 0
[pid 2472] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2472] write(3, "1000", 4) = 4
[pid 2472] close(3) = 0
[pid 2472] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2472] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2472] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2472] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2473 attached
, parent_tid=[2473], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2473
[pid 2473] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2473] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2472] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2473] <... futex resumed>) = 0
[pid 2473] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2473] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2473] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2472] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2472] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2473] <... futex resumed>) = 0
[pid 2473] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2472] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2473] <... mount resumed>) = 0
[pid 2473] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2473] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2472] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2472] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2473] <... futex resumed>) = 0
[pid 2473] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2472] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2473] <... mount resumed>) = 0
[pid 2473] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2472] <... futex resumed>) = 0
[pid 2472] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2472] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2472] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2473] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2472] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2473] <... umount2 resumed>) = 0
[pid 2472] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2473] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2472] <... clone resumed>, parent_tid=[2474], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2474
./strace-static-x86_64: Process 2474 attached
[pid 2474] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2474] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2473] <... futex resumed>) = 0
[pid 2472] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2474] <... futex resumed>) = 0
[pid 2473] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2472] <... futex resumed>) = 1
[pid 2474] umount2("./file0", MNT_DETACH) = 0
[pid 2472] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2474] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2474] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2472] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2472] exit_group(0 <unfinished ...>
[pid 2473] <... futex resumed>) = ?
[pid 2472] <... exit_group resumed>) = ?
[pid 2474] <... futex resumed>) = ?
[pid 2473] +++ exited with 0 +++
[pid 2474] +++ exited with 0 +++
[pid 2472] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2472, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2475
./strace-static-x86_64: Process 2475 attached
[pid 2475] set_robust_list(0x5555560865e0, 24) = 0
[pid 2475] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2475] setpgid(0, 0) = 0
[pid 2475] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2475] write(3, "1000", 4) = 4
[pid 2475] close(3) = 0
[pid 2475] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2475] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2475] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2475] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2476], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2476
[pid 2475] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2475] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2476 attached
<unfinished ...>
[pid 2476] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2476] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2476] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2475] <... futex resumed>) = 0
[pid 2475] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2475] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2476] <... futex resumed>) = 1
[pid 2476] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2476] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2475] <... futex resumed>) = 0
[pid 2475] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2475] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2476] <... futex resumed>) = 1
[pid 2476] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2476] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2475] <... futex resumed>) = 0
[pid 2475] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2475] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2475] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2475] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2475] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2477 attached
, parent_tid=[2477], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2477
[pid 2475] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2475] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2476] <... futex resumed>) = 1
[pid 2476] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2477] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2476] <... umount2 resumed>) = 0
[pid 2476] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2476] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2477] umount2("./file0", MNT_DETACH) = 0
[pid 2477] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2475] <... futex resumed>) = 0
[pid 2475] exit_group(0) = ?
[pid 2477] +++ exited with 0 +++
[pid 2476] <... futex resumed>) = ?
[pid 2476] +++ exited with 0 +++
[pid 2475] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2475, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2478
./strace-static-x86_64: Process 2478 attached
[pid 2478] set_robust_list(0x5555560865e0, 24) = 0
[pid 2478] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2478] setpgid(0, 0) = 0
[pid 2478] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2478] write(3, "1000", 4) = 4
[pid 2478] close(3) = 0
[pid 2478] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2478] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2478] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2478] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2479 attached
, parent_tid=[2479], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2479
[pid 2479] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2478] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2479] <... set_robust_list resumed>) = 0
[pid 2478] <... futex resumed>) = 0
[pid 2478] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2479] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2479] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2478] <... futex resumed>) = 0
[pid 2478] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2478] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2479] <... futex resumed>) = 1
[pid 2479] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2479] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2478] <... futex resumed>) = 0
[pid 2478] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2478] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2479] <... futex resumed>) = 1
[pid 2479] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2479] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2478] <... futex resumed>) = 0
[pid 2478] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2478] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2478] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2478] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2478] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2480], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2480
./strace-static-x86_64: Process 2480 attached
[pid 2478] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2478] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2479] <... futex resumed>) = 1
[pid 2479] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2480] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2479] <... umount2 resumed>) = 0
[pid 2479] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2479] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2480] umount2("./file0", MNT_DETACH) = 0
[pid 2480] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2478] <... futex resumed>) = 0
[pid 2478] exit_group(0) = ?
[pid 2479] <... futex resumed>) = ?
[pid 2479] +++ exited with 0 +++
[pid 2480] +++ exited with 0 +++
[pid 2478] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2478, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2481
./strace-static-x86_64: Process 2481 attached
[pid 2481] set_robust_list(0x5555560865e0, 24) = 0
[pid 2481] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2481] setpgid(0, 0) = 0
[pid 2481] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2481] write(3, "1000", 4) = 4
[pid 2481] close(3) = 0
[pid 2481] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2481] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2481] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2481] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2482], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2482
[pid 2481] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2481] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2482 attached
<unfinished ...>
[pid 2482] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2482] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2482] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2481] <... futex resumed>) = 0
[pid 2481] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2481] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2482] <... futex resumed>) = 1
[pid 2482] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2482] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2481] <... futex resumed>) = 0
[pid 2481] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2481] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2482] <... futex resumed>) = 1
[pid 2482] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2482] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2481] <... futex resumed>) = 0
[pid 2481] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2481] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2481] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2481] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2481] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2483], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2483
./strace-static-x86_64: Process 2483 attached
[pid 2483] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2481] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2481] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2482] <... futex resumed>) = 1
[pid 2482] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2483] <... set_robust_list resumed>) = 0
[pid 2483] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2482] <... umount2 resumed>) = 0
[pid 2482] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2482] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2483] <... umount2 resumed>) = 0
[pid 2483] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2481] <... futex resumed>) = 0
[pid 2481] exit_group(0) = ?
[pid 2482] <... futex resumed>) = ?
[pid 2483] +++ exited with 0 +++
[pid 2482] +++ exited with 0 +++
[pid 2481] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2481, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2484
./strace-static-x86_64: Process 2484 attached
[pid 2484] set_robust_list(0x5555560865e0, 24) = 0
[pid 2484] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2484] setpgid(0, 0) = 0
[pid 2484] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2484] write(3, "1000", 4) = 4
[pid 2484] close(3) = 0
[pid 2484] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2484] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2484] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2484] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2485], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2485
[pid 2484] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2484] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2485 attached
<unfinished ...>
[pid 2485] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2485] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2485] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2484] <... futex resumed>) = 0
[pid 2484] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2484] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2485] <... futex resumed>) = 1
[pid 2485] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2485] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2484] <... futex resumed>) = 0
[pid 2484] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2484] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2485] <... futex resumed>) = 1
[pid 2485] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2485] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2484] <... futex resumed>) = 0
[pid 2484] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2485] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2484] <... futex resumed>) = 0
[pid 2484] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2484] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2484] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2485] <... umount2 resumed>) = 0
[pid 2484] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2485] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2486 attached
) = 0
[pid 2484] <... clone resumed>, parent_tid=[2486], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2486
[pid 2486] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2485] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2484] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2486] <... set_robust_list resumed>) = 0
[pid 2484] <... futex resumed>) = 0
[pid 2486] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2484] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2486] <... umount2 resumed>) = 0
[pid 2486] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2484] <... futex resumed>) = 0
[pid 2484] exit_group(0 <unfinished ...>
[pid 2486] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2484] <... exit_group resumed>) = ?
[pid 2486] <... futex resumed>) = ?
[pid 2485] <... futex resumed>) = ?
[pid 2486] +++ exited with 0 +++
[pid 2485] +++ exited with 0 +++
[pid 2484] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2484, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2487
./strace-static-x86_64: Process 2487 attached
[pid 2487] set_robust_list(0x5555560865e0, 24) = 0
[pid 2487] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2487] setpgid(0, 0) = 0
[pid 2487] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2487] write(3, "1000", 4) = 4
[pid 2487] close(3) = 0
[pid 2487] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2487] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2487] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2487] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2488 attached
, parent_tid=[2488], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2488
[pid 2488] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2488] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2487] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2488] <... futex resumed>) = 0
[pid 2487] <... futex resumed>) = 1
[pid 2488] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2487] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2488] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2488] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2487] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2487] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2488] <... futex resumed>) = 0
[pid 2488] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2487] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2488] <... mount resumed>) = 0
[pid 2488] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2488] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2487] <... futex resumed>) = 0
[pid 2487] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2488] <... futex resumed>) = 0
[pid 2488] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2487] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2488] <... mount resumed>) = 0
[pid 2488] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2488] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2487] <... futex resumed>) = 0
[pid 2487] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2488] <... futex resumed>) = 0
[pid 2487] <... futex resumed>) = 1
[pid 2488] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2487] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2487] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2488] <... umount2 resumed>) = 0
[pid 2488] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2487] <... mmap resumed>) = 0x7f236e446000
[pid 2488] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2487] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2487] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2489 attached
<unfinished ...>
[pid 2489] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2489] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2487] <... clone resumed>, parent_tid=[2489], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2489
[pid 2487] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2489] <... futex resumed>) = 0
[pid 2489] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2487] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2489] <... umount2 resumed>) = 0
[pid 2489] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2487] <... futex resumed>) = 0
[pid 2487] exit_group(0 <unfinished ...>
[pid 2489] +++ exited with 0 +++
[pid 2488] <... futex resumed>) = ?
[pid 2488] +++ exited with 0 +++
[pid 2487] <... exit_group resumed>) = ?
[pid 2487] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2487, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2490
./strace-static-x86_64: Process 2490 attached
[pid 2490] set_robust_list(0x5555560865e0, 24) = 0
[pid 2490] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2490] setpgid(0, 0) = 0
[pid 2490] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2490] write(3, "1000", 4) = 4
[pid 2490] close(3) = 0
[pid 2490] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2490] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2490] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2490] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2491], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2491
./strace-static-x86_64: Process 2491 attached
[pid 2491] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2491] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2490] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2491] <... futex resumed>) = 0
[pid 2490] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2491] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2491] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2491] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2490] <... futex resumed>) = 0
[pid 2490] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2491] <... futex resumed>) = 0
[pid 2491] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2490] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2491] <... mount resumed>) = 0
[pid 2491] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2491] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2490] <... futex resumed>) = 0
[pid 2490] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2491] <... futex resumed>) = 0
[pid 2490] <... futex resumed>) = 1
[pid 2491] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2490] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2491] <... mount resumed>) = 0
[pid 2491] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2491] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2490] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2490] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2491] <... futex resumed>) = 0
[pid 2491] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2490] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2491] <... umount2 resumed>) = 0
[pid 2491] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2491] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2490] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2490] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2490] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2492 attached
<unfinished ...>
[pid 2492] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2492] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2490] <... clone resumed>, parent_tid=[2492], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2492
[pid 2490] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2492] <... futex resumed>) = 0
[pid 2492] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2490] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2492] <... umount2 resumed>) = 0
[pid 2492] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2492] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2490] <... futex resumed>) = 0
[pid 2490] exit_group(0 <unfinished ...>
[pid 2491] <... futex resumed>) = ?
[pid 2490] <... exit_group resumed>) = ?
[pid 2491] +++ exited with 0 +++
[pid 2492] <... futex resumed>) = ?
[pid 2492] +++ exited with 0 +++
[pid 2490] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2490, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2493
./strace-static-x86_64: Process 2493 attached
[pid 2493] set_robust_list(0x5555560865e0, 24) = 0
[pid 2493] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2493] setpgid(0, 0) = 0
[pid 2493] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2493] write(3, "1000", 4) = 4
[pid 2493] close(3) = 0
[pid 2493] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2493] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2493] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2493] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2494], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2494
[pid 2493] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2493] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2494 attached
<unfinished ...>
[pid 2494] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2494] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2494] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2493] <... futex resumed>) = 0
[pid 2493] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2493] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2494] <... futex resumed>) = 1
[pid 2494] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2494] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2493] <... futex resumed>) = 0
[pid 2493] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2493] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2494] <... futex resumed>) = 1
[pid 2494] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2494] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2493] <... futex resumed>) = 0
[pid 2493] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2493] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2493] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2493] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2493] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2495], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2495
[pid 2493] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2493] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2494] <... futex resumed>) = 1
[pid 2494] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 2495 attached
) = 0
[pid 2494] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2494] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2495] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2495] umount2("./file0", MNT_DETACH) = 0
[pid 2495] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2493] <... futex resumed>) = 0
[pid 2493] exit_group(0) = ?
[pid 2494] <... futex resumed>) = ?
[pid 2494] +++ exited with 0 +++
[pid 2495] +++ exited with 0 +++
[pid 2493] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2493, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2496
./strace-static-x86_64: Process 2496 attached
[pid 2496] set_robust_list(0x5555560865e0, 24) = 0
[pid 2496] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2496] setpgid(0, 0) = 0
[pid 2496] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2496] write(3, "1000", 4) = 4
[pid 2496] close(3) = 0
[pid 2496] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2496] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2496] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2496] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2497 attached
, parent_tid=[2497], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2497
[pid 2497] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2496] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2497] <... set_robust_list resumed>) = 0
[pid 2496] <... futex resumed>) = 0
[pid 2496] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2497] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2497] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2496] <... futex resumed>) = 0
[pid 2497] <... futex resumed>) = 1
[pid 2496] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2497] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2496] <... futex resumed>) = 0
[pid 2496] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2497] <... mount resumed>) = 0
[pid 2497] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2496] <... futex resumed>) = 0
[pid 2496] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2496] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2497] <... futex resumed>) = 1
[pid 2497] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2497] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2496] <... futex resumed>) = 0
[pid 2496] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2496] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2496] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2496] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2496] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2498 attached
, parent_tid=[2498], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2498
[pid 2496] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2496] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2498] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2497] <... futex resumed>) = 1
[pid 2497] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2498] <... set_robust_list resumed>) = 0
[pid 2497] <... umount2 resumed>) = 0
[pid 2497] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2497] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2498] umount2("./file0", MNT_DETACH) = 0
[pid 2498] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2496] <... futex resumed>) = 0
[pid 2496] exit_group(0) = ?
[pid 2497] <... futex resumed>) = ?
[pid 2497] +++ exited with 0 +++
[pid 2498] +++ exited with 0 +++
[pid 2496] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2496, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2499 attached
<unfinished ...>
[pid 2499] set_robust_list(0x5555560865e0, 24) = 0
[pid 371] <... clone resumed>, child_tidptr=0x5555560865d0) = 2499
[pid 2499] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2499] setpgid(0, 0) = 0
[pid 2499] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2499] write(3, "1000", 4) = 4
[pid 2499] close(3) = 0
[pid 2499] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2499] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2499] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2499] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2500], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2500
[pid 2499] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2499] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2500 attached
<unfinished ...>
[pid 2500] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2500] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2500] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2499] <... futex resumed>) = 0
[pid 2499] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2499] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2500] <... futex resumed>) = 1
[pid 2500] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2500] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2499] <... futex resumed>) = 0
[pid 2499] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2499] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2500] <... futex resumed>) = 1
[pid 2500] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2500] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2499] <... futex resumed>) = 0
[pid 2499] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2499] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2499] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2499] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2499] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2501], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2501
[pid 2499] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2499] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2500] <... futex resumed>) = 1
[pid 2500] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 2501 attached
) = 0
[pid 2500] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2500] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2501] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2501] umount2("./file0", MNT_DETACH) = 0
[pid 2501] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2499] <... futex resumed>) = 0
[pid 2499] exit_group(0) = ?
[pid 2500] <... futex resumed>) = ?
[pid 2500] +++ exited with 0 +++
[pid 2501] <... futex resumed>) = ?
[pid 2501] +++ exited with 0 +++
[pid 2499] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2499, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2502 attached
, child_tidptr=0x5555560865d0) = 2502
[pid 2502] set_robust_list(0x5555560865e0, 24) = 0
[pid 2502] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2502] setpgid(0, 0) = 0
[pid 2502] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2502] write(3, "1000", 4) = 4
[pid 2502] close(3) = 0
[pid 2502] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2502] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2502] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2502] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2503], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2503
[pid 2502] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2502] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2503 attached
<unfinished ...>
[pid 2503] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2503] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2503] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2502] <... futex resumed>) = 0
[pid 2502] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2503] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2502] <... futex resumed>) = 0
[pid 2502] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2503] <... mount resumed>) = 0
[pid 2503] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2502] <... futex resumed>) = 0
[pid 2502] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2503] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2502] <... futex resumed>) = 0
[pid 2502] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2503] <... mount resumed>) = 0
[pid 2503] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2502] <... futex resumed>) = 0
[pid 2502] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2502] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2502] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2502] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2503] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2502] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2504], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2504
[pid 2502] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2503] <... umount2 resumed>) = 0
[pid 2502] <... futex resumed>) = 0
[pid 2502] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2504 attached
<unfinished ...>
[pid 2503] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2504] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2503] <... futex resumed>) = 0
[pid 2504] <... set_robust_list resumed>) = 0
[pid 2503] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2504] umount2("./file0", MNT_DETACH) = 0
[pid 2504] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2502] <... futex resumed>) = 0
[pid 2502] exit_group(0 <unfinished ...>
[pid 2504] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2502] <... exit_group resumed>) = ?
[pid 2504] <... futex resumed>) = ?
[pid 2503] <... futex resumed>) = ?
[pid 2503] +++ exited with 0 +++
[pid 2504] +++ exited with 0 +++
[pid 2502] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2502, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2505
./strace-static-x86_64: Process 2505 attached
[pid 2505] set_robust_list(0x5555560865e0, 24) = 0
[pid 2505] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2505] setpgid(0, 0) = 0
[pid 2505] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2505] write(3, "1000", 4) = 4
[pid 2505] close(3) = 0
[pid 2505] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2505] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2505] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2505] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2506], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2506
./strace-static-x86_64: Process 2506 attached
[pid 2506] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2506] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2505] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2506] <... futex resumed>) = 0
[pid 2506] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2505] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2506] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2506] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2505] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2505] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2505] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2506] <... futex resumed>) = 0
[pid 2506] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2506] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2505] <... futex resumed>) = 0
[pid 2506] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2505] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2506] <... futex resumed>) = 0
[pid 2506] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2505] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2506] <... mount resumed>) = 0
[pid 2506] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2505] <... futex resumed>) = 0
[pid 2506] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2505] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2505] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2506] <... umount2 resumed>) = 0
[pid 2506] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2505] <... futex resumed>) = 0
[pid 2506] <... futex resumed>) = 0
[pid 2505] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2506] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2505] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2505] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2507 attached
, parent_tid=[2507], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2507
[pid 2505] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2505] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2507] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2507] umount2("./file0", MNT_DETACH) = 0
[pid 2507] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2507] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2505] <... futex resumed>) = 0
[pid 2505] exit_group(0) = ?
[pid 2506] <... futex resumed>) = ?
[pid 2507] <... futex resumed>) = 231
[pid 2506] +++ exited with 0 +++
[pid 2507] +++ exited with 0 +++
[pid 2505] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2505, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2508
./strace-static-x86_64: Process 2508 attached
[pid 2508] set_robust_list(0x5555560865e0, 24) = 0
[pid 2508] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2508] setpgid(0, 0) = 0
[pid 2508] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2508] write(3, "1000", 4) = 4
[pid 2508] close(3) = 0
[pid 2508] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2508] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2508] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2508] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2509], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2509
[pid 2508] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2508] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2509 attached
<unfinished ...>
[pid 2509] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2509] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2509] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2508] <... futex resumed>) = 0
[pid 2508] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2508] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2509] <... futex resumed>) = 1
[pid 2509] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2509] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2508] <... futex resumed>) = 0
[pid 2508] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2508] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2509] <... futex resumed>) = 1
[pid 2509] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2509] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2508] <... futex resumed>) = 0
[pid 2508] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2508] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2508] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2508] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2508] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2510 attached
, parent_tid=[2510], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2510
[pid 2508] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2508] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2509] <... futex resumed>) = 1
[pid 2509] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2510] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2510] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2509] <... umount2 resumed>) = 0
[pid 2509] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2509] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2510] <... umount2 resumed>) = 0
[pid 2510] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2508] <... futex resumed>) = 0
[pid 2508] exit_group(0) = ?
[pid 2510] +++ exited with 0 +++
[pid 2509] <... futex resumed>) = ?
[pid 2509] +++ exited with 0 +++
[pid 2508] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2508, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2511
./strace-static-x86_64: Process 2511 attached
[pid 2511] set_robust_list(0x5555560865e0, 24) = 0
[pid 2511] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2511] setpgid(0, 0) = 0
[pid 2511] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2511] write(3, "1000", 4) = 4
[pid 2511] close(3) = 0
[pid 2511] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2511] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2511] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2511] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2512 attached
, parent_tid=[2512], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2512
[pid 2512] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2512] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2511] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2512] <... futex resumed>) = 0
[pid 2511] <... futex resumed>) = 1
[pid 2512] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2512] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2512] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2511] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2511] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2512] <... futex resumed>) = 0
[pid 2512] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2512] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2512] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2511] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2511] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2512] <... futex resumed>) = 0
[pid 2512] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2511] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2512] <... mount resumed>) = 0
[pid 2512] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2512] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2511] <... futex resumed>) = 0
[pid 2511] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2511] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2511] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2511] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2512] <... futex resumed>) = 0
[pid 2511] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2512] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2511] <... clone resumed>, parent_tid=[2513], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2513
[pid 2511] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2511] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2513 attached
<unfinished ...>
[pid 2513] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2513] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2512] <... umount2 resumed>) = 0
[pid 2513] <... umount2 resumed>) = 0
[pid 2512] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2513] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2512] <... futex resumed>) = 0
[pid 2511] <... futex resumed>) = 0
[pid 2511] exit_group(0) = ?
[pid 2513] <... futex resumed>) = ?
[pid 2512] +++ exited with 0 +++
[pid 2513] +++ exited with 0 +++
[pid 2511] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2511, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2514
./strace-static-x86_64: Process 2514 attached
[pid 2514] set_robust_list(0x5555560865e0, 24) = 0
[pid 2514] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2514] setpgid(0, 0) = 0
[pid 2514] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2514] write(3, "1000", 4) = 4
[pid 2514] close(3) = 0
[pid 2514] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2514] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2514] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2514] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2515 attached
, parent_tid=[2515], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2515
[pid 2515] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2515] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2514] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2514] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2515] <... futex resumed>) = 0
[pid 2515] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2515] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2514] <... futex resumed>) = 0
[pid 2514] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2514] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2515] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2515] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2514] <... futex resumed>) = 0
[pid 2514] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2514] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2515] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2515] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2514] <... futex resumed>) = 0
[pid 2514] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2514] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2514] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2514] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2514] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2516], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2516
[pid 2514] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2514] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2515] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 2516 attached
<unfinished ...>
[pid 2516] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2515] <... umount2 resumed>) = 0
[pid 2515] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2515] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2516] umount2("./file0", MNT_DETACH) = 0
[pid 2516] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2514] <... futex resumed>) = 0
[pid 2514] exit_group(0) = ?
[pid 2516] <... futex resumed>) = 231
[pid 2515] <... futex resumed>) = ?
[pid 2515] +++ exited with 0 +++
[pid 2516] +++ exited with 0 +++
[pid 2514] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2514, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2517
./strace-static-x86_64: Process 2517 attached
[pid 2517] set_robust_list(0x5555560865e0, 24) = 0
[pid 2517] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2517] setpgid(0, 0) = 0
[pid 2517] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2517] write(3, "1000", 4) = 4
[pid 2517] close(3) = 0
[pid 2517] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2517] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2517] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2517] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2518], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2518
./strace-static-x86_64: Process 2518 attached
[pid 2517] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2518] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2517] <... futex resumed>) = 0
[pid 2518] <... set_robust_list resumed>) = 0
[pid 2518] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2518] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2518] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2517] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2517] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2518] <... futex resumed>) = 0
[pid 2517] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2518] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2518] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2518] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2517] <... futex resumed>) = 0
[pid 2517] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2518] <... futex resumed>) = 0
[pid 2517] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2518] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2518] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2518] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2517] <... futex resumed>) = 0
[pid 2517] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2517] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2517] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2518] <... futex resumed>) = 0
[pid 2517] <... mmap resumed>) = 0x7f236e446000
[pid 2518] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2517] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2517] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2518] <... umount2 resumed>) = 0
[pid 2518] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2518] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2519 attached
<unfinished ...>
[pid 2519] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2519] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2517] <... clone resumed>, parent_tid=[2519], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2519
[pid 2517] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2519] <... futex resumed>) = 0
[pid 2517] <... futex resumed>) = 1
[pid 2519] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2517] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2519] <... umount2 resumed>) = 0
[pid 2519] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2517] <... futex resumed>) = 0
[pid 2519] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2517] exit_group(0) = ?
[pid 2518] <... futex resumed>) = ?
[pid 2518] +++ exited with 0 +++
[pid 2519] <... futex resumed>) = ?
[pid 2519] +++ exited with 0 +++
[pid 2517] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2517, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2520
./strace-static-x86_64: Process 2520 attached
[pid 2520] set_robust_list(0x5555560865e0, 24) = 0
[pid 2520] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2520] setpgid(0, 0) = 0
[pid 2520] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2520] write(3, "1000", 4) = 4
[pid 2520] close(3) = 0
[pid 2520] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2520] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2520] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2520] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2521], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2521
./strace-static-x86_64: Process 2521 attached
[pid 2521] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2521] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2520] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2521] <... futex resumed>) = 0
[pid 2521] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2521] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2521] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2520] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2520] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2521] <... futex resumed>) = 0
[pid 2521] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2520] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2521] <... mount resumed>) = 0
[pid 2521] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2521] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2520] <... futex resumed>) = 0
[pid 2520] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2521] <... futex resumed>) = 0
[pid 2521] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2520] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2521] <... mount resumed>) = 0
[pid 2521] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2521] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2520] <... futex resumed>) = 0
[pid 2520] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2521] <... futex resumed>) = 0
[pid 2521] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2520] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2521] <... umount2 resumed>) = 0
[pid 2521] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2521] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2520] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2520] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2520] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2522 attached
, parent_tid=[2522], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2522
[pid 2522] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2522] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2520] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2522] <... futex resumed>) = 0
[pid 2522] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2520] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2522] <... umount2 resumed>) = 0
[pid 2522] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2522] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2520] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2520] exit_group(0 <unfinished ...>
[pid 2521] <... futex resumed>) = ?
[pid 2520] <... exit_group resumed>) = ?
[pid 2521] +++ exited with 0 +++
[pid 2522] <... futex resumed>) = ?
[pid 2522] +++ exited with 0 +++
[pid 2520] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2520, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2523
./strace-static-x86_64: Process 2523 attached
[pid 2523] set_robust_list(0x5555560865e0, 24) = 0
[pid 2523] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2523] setpgid(0, 0) = 0
[pid 2523] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2523] write(3, "1000", 4) = 4
[pid 2523] close(3) = 0
[pid 2523] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2523] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2523] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2523] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2524 attached
, parent_tid=[2524], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2524
[pid 2524] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2523] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2524] <... set_robust_list resumed>) = 0
[pid 2524] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2524] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2523] <... futex resumed>) = 0
[pid 2524] <... futex resumed>) = 0
[pid 2523] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2524] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2523] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2523] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2524] <... futex resumed>) = 0
[pid 2524] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2523] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2524] <... mount resumed>) = 0
[pid 2524] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2523] <... futex resumed>) = 0
[pid 2524] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2523] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2524] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2523] <... futex resumed>) = 0
[pid 2524] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2523] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2524] <... mount resumed>) = 0
[pid 2524] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2524] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2523] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2523] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2524] <... futex resumed>) = 0
[pid 2523] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2524] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2523] <... futex resumed>) = 0
[pid 2524] <... umount2 resumed>) = 0
[pid 2523] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2524] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2524] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2523] <... mmap resumed>) = 0x7f236e446000
[pid 2523] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2523] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2525 attached
, parent_tid=[2525], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2525
[pid 2525] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2523] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2525] <... set_robust_list resumed>) = 0
[pid 2525] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2523] <... futex resumed>) = 0
[pid 2523] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2525] <... umount2 resumed>) = 0
[pid 2525] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2525] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2523] <... futex resumed>) = 0
[pid 2523] exit_group(0 <unfinished ...>
[pid 2524] <... futex resumed>) = ?
[pid 2524] +++ exited with 0 +++
[pid 2523] <... exit_group resumed>) = ?
[pid 2525] <... futex resumed>) = ?
[pid 2525] +++ exited with 0 +++
[pid 2523] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2523, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2526
./strace-static-x86_64: Process 2526 attached
[pid 2526] set_robust_list(0x5555560865e0, 24) = 0
[pid 2526] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2526] setpgid(0, 0) = 0
[pid 2526] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2526] write(3, "1000", 4) = 4
[pid 2526] close(3) = 0
[pid 2526] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2526] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2526] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2526] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2527], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2527
[pid 2526] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2526] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2527 attached
<unfinished ...>
[pid 2527] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2527] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2527] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2526] <... futex resumed>) = 0
[pid 2526] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2526] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2527] <... futex resumed>) = 1
[pid 2527] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2527] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2526] <... futex resumed>) = 0
[pid 2526] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2526] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2527] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2527] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2526] <... futex resumed>) = 0
[pid 2526] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2526] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2526] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2526] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2527] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2526] <... mprotect resumed>) = 0
[pid 2526] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2528 attached
, parent_tid=[2528], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2528
[pid 2527] <... umount2 resumed>) = 0
[pid 2526] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2526] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2528] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2527] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2528] <... set_robust_list resumed>) = 0
[pid 2527] <... futex resumed>) = 0
[pid 2528] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2527] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2528] <... umount2 resumed>) = 0
[pid 2528] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2526] <... futex resumed>) = 0
[pid 2526] exit_group(0) = ?
[pid 2527] <... futex resumed>) = ?
[pid 2527] +++ exited with 0 +++
[pid 2528] +++ exited with 0 +++
[pid 2526] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2526, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2529
./strace-static-x86_64: Process 2529 attached
[pid 2529] set_robust_list(0x5555560865e0, 24) = 0
[pid 2529] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2529] setpgid(0, 0) = 0
[pid 2529] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2529] write(3, "1000", 4) = 4
[pid 2529] close(3) = 0
[pid 2529] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2529] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2529] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2529] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2530 attached
, parent_tid=[2530], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2530
[pid 2530] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2530] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2529] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2530] <... futex resumed>) = 0
[pid 2530] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2530] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2530] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2529] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2529] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2530] <... futex resumed>) = 0
[pid 2530] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2529] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2530] <... mount resumed>) = 0
[pid 2530] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2530] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2529] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2529] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2530] <... futex resumed>) = 0
[pid 2530] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2529] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2530] <... mount resumed>) = 0
[pid 2530] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2530] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2529] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2529] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2530] <... futex resumed>) = 0
[pid 2530] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2529] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2530] <... umount2 resumed>) = 0
[pid 2530] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2530] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2529] <... futex resumed>) = 0
[pid 2529] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2529] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2529] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2531], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2531
[pid 2529] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2529] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2531 attached
<unfinished ...>
[pid 2531] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2531] umount2("./file0", MNT_DETACH) = 0
[pid 2531] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2529] <... futex resumed>) = 0
[pid 2529] exit_group(0) = ?
[pid 2530] <... futex resumed>) = ?
[pid 2530] +++ exited with 0 +++
[pid 2531] +++ exited with 0 +++
[pid 2529] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2529, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2532
./strace-static-x86_64: Process 2532 attached
[pid 2532] set_robust_list(0x5555560865e0, 24) = 0
[pid 2532] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2532] setpgid(0, 0) = 0
[pid 2532] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2532] write(3, "1000", 4) = 4
[pid 2532] close(3) = 0
[pid 2532] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2532] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2532] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2532] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2533 attached
<unfinished ...>
[pid 2533] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2533] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2532] <... clone resumed>, parent_tid=[2533], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2533
[pid 2532] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2533] <... futex resumed>) = 0
[pid 2533] mkdir("./file0", 000 <unfinished ...>
[pid 2532] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2533] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2533] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2533] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2532] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2532] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2533] <... futex resumed>) = 0
[pid 2533] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2532] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2533] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2532] <... futex resumed>) = 0
[pid 2532] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2532] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2533] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2533] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2532] <... futex resumed>) = 0
[pid 2532] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2532] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2532] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2532] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2532] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2533] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2532] <... clone resumed>, parent_tid=[2534], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2534
./strace-static-x86_64: Process 2534 attached
[pid 2534] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2534] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2532] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2533] <... umount2 resumed>) = 0
[pid 2534] <... futex resumed>) = 0
[pid 2534] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2532] <... futex resumed>) = 1
[pid 2534] <... umount2 resumed>) = 0
[pid 2534] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2534] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2533] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2532] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2533] <... futex resumed>) = 0
[pid 2532] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2533] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2532] exit_group(0) = ?
[pid 2533] <... futex resumed>) = ?
[pid 2534] <... futex resumed>) = ?
[pid 2534] +++ exited with 0 +++
[pid 2533] +++ exited with 0 +++
[pid 2532] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2532, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2535
./strace-static-x86_64: Process 2535 attached
[pid 2535] set_robust_list(0x5555560865e0, 24) = 0
[pid 2535] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2535] setpgid(0, 0) = 0
[pid 2535] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2535] write(3, "1000", 4) = 4
[pid 2535] close(3) = 0
[pid 2535] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2535] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2535] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2535] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2536 attached
, parent_tid=[2536], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2536
[pid 2536] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2535] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2535] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2536] <... set_robust_list resumed>) = 0
[pid 2536] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2536] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2535] <... futex resumed>) = 0
[pid 2535] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2535] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2536] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2536] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2535] <... futex resumed>) = 0
[pid 2535] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2535] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2536] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2536] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2535] <... futex resumed>) = 0
[pid 2536] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2535] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2536] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2535] <... futex resumed>) = 0
[pid 2536] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2535] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2536] <... umount2 resumed>) = 0
[pid 2535] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2536] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2535] <... mmap resumed>) = 0x7f236e446000
[pid 2536] <... futex resumed>) = 0
[pid 2535] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2536] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2535] <... mprotect resumed>) = 0
[pid 2535] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2537], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2537
./strace-static-x86_64: Process 2537 attached
[pid 2537] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2537] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2535] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2537] <... futex resumed>) = 0
[pid 2537] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2535] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2537] <... umount2 resumed>) = 0
[pid 2537] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2535] <... futex resumed>) = 0
[pid 2537] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2535] exit_group(0) = ?
[pid 2537] <... futex resumed>) = ?
[pid 2537] +++ exited with 0 +++
[pid 2536] <... futex resumed>) = ?
[pid 2536] +++ exited with 0 +++
[pid 2535] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2535, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2538
./strace-static-x86_64: Process 2538 attached
[pid 2538] set_robust_list(0x5555560865e0, 24) = 0
[pid 2538] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2538] setpgid(0, 0) = 0
[pid 2538] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2538] write(3, "1000", 4) = 4
[pid 2538] close(3) = 0
[pid 2538] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2538] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2538] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2538] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2539 attached
, parent_tid=[2539], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2539
[pid 2539] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2538] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2539] <... set_robust_list resumed>) = 0
[pid 2538] <... futex resumed>) = 0
[pid 2538] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2539] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2539] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2538] <... futex resumed>) = 0
[pid 2539] <... futex resumed>) = 1
[pid 2538] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2539] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2538] <... futex resumed>) = 0
[pid 2538] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2539] <... mount resumed>) = 0
[pid 2539] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2538] <... futex resumed>) = 0
[pid 2539] <... futex resumed>) = 1
[pid 2538] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2539] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2538] <... futex resumed>) = 0
[pid 2538] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2539] <... mount resumed>) = 0
[pid 2539] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2538] <... futex resumed>) = 0
[pid 2538] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2538] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2538] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2538] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2538] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2539] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2538] <... clone resumed>, parent_tid=[2540], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2540
[pid 2538] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2538] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2540 attached
<unfinished ...>
[pid 2539] <... umount2 resumed>) = 0
[pid 2540] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2539] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2540] <... set_robust_list resumed>) = 0
[pid 2539] <... futex resumed>) = 0
[pid 2540] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2539] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2540] <... umount2 resumed>) = 0
[pid 2540] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2538] <... futex resumed>) = 0
[pid 2538] exit_group(0) = ?
[pid 2539] <... futex resumed>) = ?
[pid 2540] +++ exited with 0 +++
[pid 2539] +++ exited with 0 +++
[pid 2538] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2538, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2541 attached
, child_tidptr=0x5555560865d0) = 2541
[pid 2541] set_robust_list(0x5555560865e0, 24) = 0
[pid 2541] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2541] setpgid(0, 0) = 0
[pid 2541] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2541] write(3, "1000", 4) = 4
[pid 2541] close(3) = 0
[pid 2541] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2541] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2541] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2541] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2542 attached
<unfinished ...>
[pid 2542] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2541] <... clone resumed>, parent_tid=[2542], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2542
[pid 2542] <... set_robust_list resumed>) = 0
[pid 2541] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2542] mkdir("./file0", 000 <unfinished ...>
[pid 2541] <... futex resumed>) = 0
[pid 2541] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2542] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2542] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2541] <... futex resumed>) = 0
[pid 2542] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2541] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2541] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2542] <... mount resumed>) = 0
[pid 2542] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2541] <... futex resumed>) = 0
[pid 2542] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2541] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2541] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2542] <... mount resumed>) = 0
[pid 2542] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2541] <... futex resumed>) = 0
[pid 2541] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2541] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2542] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2541] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2541] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2541] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2543], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2543
[pid 2541] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2541] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2543 attached
<unfinished ...>
[pid 2542] <... umount2 resumed>) = 0
[pid 2543] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2543] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2542] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2542] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2543] <... umount2 resumed>) = 0
[pid 2543] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2541] <... futex resumed>) = 0
[pid 2541] exit_group(0) = ?
[pid 2543] <... futex resumed>) = ?
[pid 2542] <... futex resumed>) = ?
[pid 2543] +++ exited with 0 +++
[pid 2542] +++ exited with 0 +++
[pid 2541] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2541, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2544
./strace-static-x86_64: Process 2544 attached
[pid 2544] set_robust_list(0x5555560865e0, 24) = 0
[pid 2544] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2544] setpgid(0, 0) = 0
[pid 2544] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2544] write(3, "1000", 4) = 4
[pid 2544] close(3) = 0
[pid 2544] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2544] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2544] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2544] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2545 attached
<unfinished ...>
[pid 2545] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2545] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2544] <... clone resumed>, parent_tid=[2545], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2545
[pid 2544] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2545] <... futex resumed>) = 0
[pid 2545] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2545] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2545] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2544] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2544] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2545] <... futex resumed>) = 0
[pid 2545] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2544] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2545] <... mount resumed>) = 0
[pid 2545] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2545] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2544] <... futex resumed>) = 0
[pid 2544] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2545] <... futex resumed>) = 0
[pid 2545] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2544] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2545] <... mount resumed>) = 0
[pid 2545] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2544] <... futex resumed>) = 0
[pid 2545] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2544] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2545] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2544] <... futex resumed>) = 0
[pid 2545] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2544] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2545] <... umount2 resumed>) = 0
[pid 2544] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2545] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2544] <... mmap resumed>) = 0x7f236e446000
[pid 2545] <... futex resumed>) = 0
[pid 2544] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2545] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2544] <... mprotect resumed>) = 0
[pid 2544] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2546 attached
, parent_tid=[2546], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2546
[pid 2546] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2544] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2546] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2544] <... futex resumed>) = 0
[pid 2544] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2546] <... umount2 resumed>) = 0
[pid 2546] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2544] <... futex resumed>) = 0
[pid 2546] <... futex resumed>) = 1
[pid 2546] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2544] exit_group(0) = ?
[pid 2545] <... futex resumed>) = 231
[pid 2546] <... futex resumed>) = ?
[pid 2545] +++ exited with 0 +++
[pid 2546] +++ exited with 0 +++
[pid 2544] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2544, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2547
./strace-static-x86_64: Process 2547 attached
[pid 2547] set_robust_list(0x5555560865e0, 24) = 0
[pid 2547] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2547] setpgid(0, 0) = 0
[pid 2547] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2547] write(3, "1000", 4) = 4
[pid 2547] close(3) = 0
[pid 2547] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2547] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2547] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2547] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2548 attached
<unfinished ...>
[pid 2548] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2547] <... clone resumed>, parent_tid=[2548], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2548
[pid 2548] <... set_robust_list resumed>) = 0
[pid 2548] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2547] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2548] <... futex resumed>) = 0
[pid 2547] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2548] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2548] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2548] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2547] <... futex resumed>) = 0
[pid 2547] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2548] <... futex resumed>) = 0
[pid 2548] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2547] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2548] <... mount resumed>) = 0
[pid 2548] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2548] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2547] <... futex resumed>) = 0
[pid 2547] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2548] <... futex resumed>) = 0
[pid 2547] <... futex resumed>) = 1
[pid 2548] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2547] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2548] <... mount resumed>) = 0
[pid 2548] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2547] <... futex resumed>) = 0
[pid 2547] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2547] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2548] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2547] <... futex resumed>) = 0
[pid 2547] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2547] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2548] <... umount2 resumed>) = 0
[pid 2547] <... mprotect resumed>) = 0
[pid 2548] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2547] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2548] <... futex resumed>) = 0
[pid 2548] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2549 attached
<unfinished ...>
[pid 2549] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2547] <... clone resumed>, parent_tid=[2549], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2549
[pid 2549] <... set_robust_list resumed>) = 0
[pid 2549] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2547] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2549] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2549] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2547] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2549] <... umount2 resumed>) = 0
[pid 2549] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2547] <... futex resumed>) = 0
[pid 2549] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2547] exit_group(0 <unfinished ...>
[pid 2549] <... futex resumed>) = ?
[pid 2548] <... futex resumed>) = ?
[pid 2547] <... exit_group resumed>) = ?
[pid 2548] +++ exited with 0 +++
[pid 2549] +++ exited with 0 +++
[pid 2547] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2547, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2550
./strace-static-x86_64: Process 2550 attached
[pid 2550] set_robust_list(0x5555560865e0, 24) = 0
[pid 2550] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2550] setpgid(0, 0) = 0
[pid 2550] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2550] write(3, "1000", 4) = 4
[pid 2550] close(3) = 0
[pid 2550] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2550] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2550] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2550] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2551 attached
, parent_tid=[2551], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2551
[pid 2551] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2551] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2550] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2551] <... futex resumed>) = 0
[pid 2551] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2551] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2550] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2551] <... futex resumed>) = 0
[pid 2550] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2551] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2550] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2551] <... futex resumed>) = 0
[pid 2551] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2550] <... futex resumed>) = 1
[pid 2550] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2551] <... mount resumed>) = 0
[pid 2551] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2551] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2550] <... futex resumed>) = 0
[pid 2550] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2550] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2551] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2551] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2551] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2550] <... futex resumed>) = 0
[pid 2551] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2550] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2550] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2550] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2550] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2550] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2552], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2552
[pid 2550] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2551] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
./strace-static-x86_64: Process 2552 attached
[pid 2551] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2550] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2552] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2551] <... umount2 resumed>) = 0
[pid 2551] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2551] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2552] <... set_robust_list resumed>) = 0
[pid 2552] umount2("./file0", MNT_DETACH) = 0
[pid 2552] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2550] <... futex resumed>) = 0
[pid 2550] exit_group(0 <unfinished ...>
[pid 2551] <... futex resumed>) = ?
[pid 2551] +++ exited with 0 +++
[pid 2550] <... exit_group resumed>) = ?
[pid 2552] +++ exited with 0 +++
[pid 2550] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2550, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2553 attached
, child_tidptr=0x5555560865d0) = 2553
[pid 2553] set_robust_list(0x5555560865e0, 24) = 0
[pid 2553] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2553] setpgid(0, 0) = 0
[pid 2553] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2553] write(3, "1000", 4) = 4
[pid 2553] close(3) = 0
[pid 2553] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2553] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2553] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2553] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2554 attached
, parent_tid=[2554], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2554
[pid 2554] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2554] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2553] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2554] <... futex resumed>) = 0
[pid 2554] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2554] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2554] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2553] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2553] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2554] <... futex resumed>) = 0
[pid 2554] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2553] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2554] <... mount resumed>) = 0
[pid 2554] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2554] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2553] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2553] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2554] <... futex resumed>) = 0
[pid 2554] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2553] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2554] <... mount resumed>) = 0
[pid 2554] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2554] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2553] <... futex resumed>) = 0
[pid 2553] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2553] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2553] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2553] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2554] <... futex resumed>) = 0
[pid 2554] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2553] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2555], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2555
./strace-static-x86_64: Process 2555 attached
[pid 2554] <... umount2 resumed>) = 0
[pid 2553] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2553] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2554] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2555] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2554] <... futex resumed>) = 0
[pid 2555] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2554] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2555] <... umount2 resumed>) = 0
[pid 2555] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2553] <... futex resumed>) = 0
[pid 2553] exit_group(0) = ?
[pid 2554] <... futex resumed>) = ?
[pid 2554] +++ exited with 0 +++
[pid 2555] +++ exited with 0 +++
[pid 2553] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2553, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2556
./strace-static-x86_64: Process 2556 attached
[pid 2556] set_robust_list(0x5555560865e0, 24) = 0
[pid 2556] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2556] setpgid(0, 0) = 0
[pid 2556] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2556] write(3, "1000", 4) = 4
[pid 2556] close(3) = 0
[pid 2556] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2556] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2556] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2556] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2557 attached
<unfinished ...>
[pid 2557] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2557] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2556] <... clone resumed>, parent_tid=[2557], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2557
[pid 2556] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2557] <... futex resumed>) = 0
[pid 2557] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2557] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2557] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2556] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2556] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2557] <... futex resumed>) = 0
[pid 2557] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2556] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2557] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2557] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2556] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2556] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2557] <... futex resumed>) = 0
[pid 2557] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2556] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2557] <... mount resumed>) = 0
[pid 2557] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2557] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2556] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2556] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2557] <... futex resumed>) = 0
[pid 2557] umount2("./file0", MNT_DETACH) = 0
[pid 2556] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2557] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2557] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2556] <... futex resumed>) = 0
[pid 2556] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2556] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2556] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2558 attached
, parent_tid=[2558], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2558
[pid 2558] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2558] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2556] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2558] <... futex resumed>) = 0
[pid 2558] umount2("./file0", MNT_DETACH) = 0
[pid 2558] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2558] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2556] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2556] exit_group(0 <unfinished ...>
[pid 2557] <... futex resumed>) = ?
[pid 2556] <... exit_group resumed>) = ?
[pid 2557] +++ exited with 0 +++
[pid 2558] <... futex resumed>) = ?
[pid 2558] +++ exited with 0 +++
[pid 2556] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2556, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2559
./strace-static-x86_64: Process 2559 attached
[pid 2559] set_robust_list(0x5555560865e0, 24) = 0
[pid 2559] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2559] setpgid(0, 0) = 0
[pid 2559] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2559] write(3, "1000", 4) = 4
[pid 2559] close(3) = 0
[pid 2559] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2559] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2559] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2559] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2560 attached
, parent_tid=[2560], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2560
[pid 2560] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2560] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2559] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2560] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2559] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2560] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2560] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2560] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2559] <... futex resumed>) = 0
[pid 2559] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2560] <... futex resumed>) = 0
[pid 2559] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2560] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2560] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2560] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2559] <... futex resumed>) = 0
[pid 2559] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2560] <... futex resumed>) = 0
[pid 2559] <... futex resumed>) = 1
[pid 2560] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2559] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2560] <... mount resumed>) = 0
[pid 2560] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2559] <... futex resumed>) = 0
[pid 2560] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2559] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2559] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2559] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2559] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2559] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2560] <... umount2 resumed>) = 0
[pid 2560] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2559] <... clone resumed>, parent_tid=[2561], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2561
[pid 2560] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2559] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 2561 attached
[pid 2559] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2561] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2561] umount2("./file0", MNT_DETACH) = 0
[pid 2561] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2559] <... futex resumed>) = 0
[pid 2559] exit_group(0) = ?
[pid 2560] <... futex resumed>) = ?
[pid 2560] +++ exited with 0 +++
[pid 2561] +++ exited with 0 +++
[pid 2559] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2559, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2562
./strace-static-x86_64: Process 2562 attached
[pid 2562] set_robust_list(0x5555560865e0, 24) = 0
[pid 2562] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2562] setpgid(0, 0) = 0
[pid 2562] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2562] write(3, "1000", 4) = 4
[pid 2562] close(3) = 0
[pid 2562] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2562] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2562] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2562] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2563 attached
<unfinished ...>
[pid 2563] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2563] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2562] <... clone resumed>, parent_tid=[2563], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2563
[pid 2562] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2563] <... futex resumed>) = 0
[pid 2563] mkdir("./file0", 000 <unfinished ...>
[pid 2562] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2563] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2563] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2563] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2562] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2562] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2563] <... futex resumed>) = 0
[pid 2563] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2562] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2563] <... mount resumed>) = 0
[pid 2563] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2563] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2562] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2562] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2563] <... futex resumed>) = 0
[pid 2563] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2562] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2563] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2563] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2562] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2562] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2563] <... futex resumed>) = 0
[pid 2563] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2562] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2563] <... umount2 resumed>) = 0
[pid 2563] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2563] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2562] <... futex resumed>) = 0
[pid 2562] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2562] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2562] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2564 attached
<unfinished ...>
[pid 2564] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2564] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2562] <... clone resumed>, parent_tid=[2564], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2564
[pid 2562] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2564] <... futex resumed>) = 0
[pid 2564] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2562] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2564] <... umount2 resumed>) = 0
[pid 2564] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2564] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2562] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2562] exit_group(0 <unfinished ...>
[pid 2563] <... futex resumed>) = ?
[pid 2562] <... exit_group resumed>) = ?
[pid 2563] +++ exited with 0 +++
[pid 2564] <... futex resumed>) = ?
[pid 2564] +++ exited with 0 +++
[pid 2562] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2562, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2565
./strace-static-x86_64: Process 2565 attached
[pid 2565] set_robust_list(0x5555560865e0, 24) = 0
[pid 2565] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2565] setpgid(0, 0) = 0
[pid 2565] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2565] write(3, "1000", 4) = 4
[pid 2565] close(3) = 0
[pid 2565] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2565] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2565] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2565] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2566 attached
<unfinished ...>
[pid 2566] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2565] <... clone resumed>, parent_tid=[2566], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2566
[pid 2566] <... set_robust_list resumed>) = 0
[pid 2565] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2565] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2566] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2566] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2565] <... futex resumed>) = 0
[pid 2566] <... futex resumed>) = 1
[pid 2565] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2566] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2565] <... futex resumed>) = 0
[pid 2565] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2566] <... mount resumed>) = 0
[pid 2566] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2565] <... futex resumed>) = 0
[pid 2566] <... futex resumed>) = 1
[pid 2565] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2566] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2565] <... futex resumed>) = 0
[pid 2565] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2566] <... mount resumed>) = 0
[pid 2566] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2565] <... futex resumed>) = 0
[pid 2566] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2565] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2565] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2565] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2565] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2566] <... umount2 resumed>) = 0
[pid 2565] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2566] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2567 attached
) = 0
[pid 2565] <... clone resumed>, parent_tid=[2567], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2567
[pid 2567] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2566] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2565] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2565] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2567] <... set_robust_list resumed>) = 0
[pid 2567] umount2("./file0", MNT_DETACH) = 0
[pid 2567] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2565] <... futex resumed>) = 0
[pid 2565] exit_group(0) = ?
[pid 2567] +++ exited with 0 +++
[pid 2566] <... futex resumed>) = ?
[pid 2566] +++ exited with 0 +++
[pid 2565] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2565, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2568
./strace-static-x86_64: Process 2568 attached
[pid 2568] set_robust_list(0x5555560865e0, 24) = 0
[pid 2568] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2568] setpgid(0, 0) = 0
[pid 2568] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2568] write(3, "1000", 4) = 4
[pid 2568] close(3) = 0
[pid 2568] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2568] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2568] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2568] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2569], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2569
./strace-static-x86_64: Process 2569 attached
[pid 2569] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2569] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2568] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2569] <... futex resumed>) = 0
[pid 2568] <... futex resumed>) = 1
[pid 2569] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2569] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2569] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2568] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2568] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2569] <... futex resumed>) = 0
[pid 2568] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2569] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2569] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2569] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2568] <... futex resumed>) = 0
[pid 2568] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2569] <... futex resumed>) = 0
[pid 2568] <... futex resumed>) = 1
[pid 2569] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2568] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2569] <... mount resumed>) = 0
[pid 2569] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2568] <... futex resumed>) = 0
[pid 2568] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2568] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2568] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2568] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2569] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2568] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2570], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2570
./strace-static-x86_64: Process 2570 attached
[pid 2569] <... umount2 resumed>) = 0
[pid 2568] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2568] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2569] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2570] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2569] <... futex resumed>) = 0
[pid 2570] <... set_robust_list resumed>) = 0
[pid 2570] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2569] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2570] <... umount2 resumed>) = 0
[pid 2570] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2568] <... futex resumed>) = 0
[pid 2568] exit_group(0 <unfinished ...>
[pid 2569] <... futex resumed>) = ?
[pid 2569] +++ exited with 0 +++
[pid 2568] <... exit_group resumed>) = ?
[pid 2570] +++ exited with 0 +++
[pid 2568] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2568, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2571
./strace-static-x86_64: Process 2571 attached
[pid 2571] set_robust_list(0x5555560865e0, 24) = 0
[pid 2571] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2571] setpgid(0, 0) = 0
[pid 2571] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2571] write(3, "1000", 4) = 4
[pid 2571] close(3) = 0
[pid 2571] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2571] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2571] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2571] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2572 attached
, parent_tid=[2572], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2572
[pid 2572] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2572] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2571] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2572] <... futex resumed>) = 0
[pid 2572] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2571] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2572] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2572] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2571] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2571] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2572] <... futex resumed>) = 0
[pid 2571] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2572] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2572] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2572] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2571] <... futex resumed>) = 0
[pid 2571] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2572] <... futex resumed>) = 0
[pid 2572] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2571] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2572] <... mount resumed>) = 0
[pid 2572] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2572] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2571] <... futex resumed>) = 0
[pid 2571] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2572] <... futex resumed>) = 0
[pid 2572] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2571] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2571] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2572] <... umount2 resumed>) = 0
[pid 2571] <... mmap resumed>) = 0x7f236e446000
[pid 2572] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2571] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2572] <... futex resumed>) = 0
[pid 2571] <... mprotect resumed>) = 0
[pid 2572] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2571] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2573 attached
, parent_tid=[2573], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2573
[pid 2573] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2571] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2573] <... set_robust_list resumed>) = 0
[pid 2573] umount2("./file0", MNT_DETACH) = 0
[pid 2571] <... futex resumed>) = 0
[pid 2573] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2573] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2571] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2571] exit_group(0) = ?
[pid 2572] <... futex resumed>) = ?
[pid 2572] +++ exited with 0 +++
[pid 2573] <... futex resumed>) = ?
[pid 2573] +++ exited with 0 +++
[pid 2571] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2571, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2574
./strace-static-x86_64: Process 2574 attached
[pid 2574] set_robust_list(0x5555560865e0, 24) = 0
[pid 2574] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2574] setpgid(0, 0) = 0
[pid 2574] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2574] write(3, "1000", 4) = 4
[pid 2574] close(3) = 0
[pid 2574] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2574] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2574] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2574] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2575 attached
<unfinished ...>
[pid 2575] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2574] <... clone resumed>, parent_tid=[2575], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2575
[pid 2575] <... set_robust_list resumed>) = 0
[pid 2574] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2575] mkdir("./file0", 000 <unfinished ...>
[pid 2574] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2575] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2575] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2574] <... futex resumed>) = 0
[pid 2575] <... futex resumed>) = 1
[pid 2574] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2575] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2574] <... futex resumed>) = 0
[pid 2574] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2575] <... mount resumed>) = 0
[pid 2575] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2574] <... futex resumed>) = 0
[pid 2575] <... futex resumed>) = 1
[pid 2574] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2575] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2574] <... futex resumed>) = 0
[pid 2574] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2575] <... mount resumed>) = 0
[pid 2575] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2574] <... futex resumed>) = 0
[pid 2575] <... futex resumed>) = 1
[pid 2574] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2575] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2574] <... futex resumed>) = 0
[pid 2574] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2574] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2575] <... umount2 resumed>) = 0
[pid 2574] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2575] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2574] <... mprotect resumed>) = 0
[pid 2575] <... futex resumed>) = 0
[pid 2574] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2575] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2576 attached
<unfinished ...>
[pid 2574] <... clone resumed>, parent_tid=[2576], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2576
[pid 2576] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2574] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2576] <... set_robust_list resumed>) = 0
[pid 2574] <... futex resumed>) = 0
[pid 2574] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2576] umount2("./file0", MNT_DETACH) = 0
[pid 2576] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2574] <... futex resumed>) = 0
[pid 2574] exit_group(0 <unfinished ...>
[pid 2576] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2574] <... exit_group resumed>) = ?
[pid 2575] <... futex resumed>) = ?
[pid 2575] +++ exited with 0 +++
[pid 2576] <... futex resumed>) = ?
[pid 2576] +++ exited with 0 +++
[pid 2574] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2574, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2577
./strace-static-x86_64: Process 2577 attached
[pid 2577] set_robust_list(0x5555560865e0, 24) = 0
[pid 2577] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2577] setpgid(0, 0) = 0
[pid 2577] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2577] write(3, "1000", 4) = 4
[pid 2577] close(3) = 0
[pid 2577] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2577] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2577] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2577] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2578 attached
, parent_tid=[2578], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2578
[pid 2578] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2578] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2577] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2578] <... futex resumed>) = 0
[pid 2578] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2578] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2578] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2577] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2577] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2578] <... futex resumed>) = 0
[pid 2578] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2577] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2578] <... mount resumed>) = 0
[pid 2578] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2578] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2577] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2577] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2577] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2578] <... futex resumed>) = 0
[pid 2578] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2578] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2577] <... futex resumed>) = 0
[pid 2577] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2577] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2577] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2578] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2577] <... mmap resumed>) = 0x7f236e446000
[pid 2577] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2577] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2578] <... umount2 resumed>) = 0
[pid 2577] <... clone resumed>, parent_tid=[2579], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2579
[pid 2578] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2577] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2577] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2579 attached
<unfinished ...>
[pid 2578] <... futex resumed>) = 0
[pid 2578] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2579] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2579] umount2("./file0", MNT_DETACH) = 0
[pid 2579] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2577] <... futex resumed>) = 0
[pid 2577] exit_group(0) = ?
[pid 2578] <... futex resumed>) = ?
[pid 2578] +++ exited with 0 +++
[pid 2579] +++ exited with 0 +++
[pid 2577] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2577, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2580
./strace-static-x86_64: Process 2580 attached
[pid 2580] set_robust_list(0x5555560865e0, 24) = 0
[pid 2580] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2580] setpgid(0, 0) = 0
[pid 2580] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2580] write(3, "1000", 4) = 4
[pid 2580] close(3) = 0
[pid 2580] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2580] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2580] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2580] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2581], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2581
[pid 2580] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2580] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2581 attached
<unfinished ...>
[pid 2581] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2581] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2581] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2580] <... futex resumed>) = 0
[pid 2580] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2580] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2581] <... futex resumed>) = 1
[pid 2581] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2581] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2580] <... futex resumed>) = 0
[pid 2581] <... futex resumed>) = 1
[pid 2580] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2581] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2580] <... futex resumed>) = 0
[pid 2580] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2581] <... mount resumed>) = 0
[pid 2581] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2580] <... futex resumed>) = 0
[pid 2581] <... futex resumed>) = 1
[pid 2580] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2581] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2580] <... futex resumed>) = 0
[pid 2580] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2580] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2580] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2580] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2581] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2582 attached
[pid 2581] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2580] <... clone resumed>, parent_tid=[2582], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2582
[pid 2582] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2581] <... futex resumed>) = 0
[pid 2580] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2582] <... set_robust_list resumed>) = 0
[pid 2581] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2580] <... futex resumed>) = 0
[pid 2582] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2580] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2582] <... umount2 resumed>) = 0
[pid 2582] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2580] <... futex resumed>) = 0
[pid 2580] exit_group(0) = ?
[pid 2581] <... futex resumed>) = ?
[pid 2581] +++ exited with 0 +++
[pid 2582] <... futex resumed>) = ?
[pid 2582] +++ exited with 0 +++
[pid 2580] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2580, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2583
./strace-static-x86_64: Process 2583 attached
[pid 2583] set_robust_list(0x5555560865e0, 24) = 0
[pid 2583] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2583] setpgid(0, 0) = 0
[pid 2583] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2583] write(3, "1000", 4) = 4
[pid 2583] close(3) = 0
[pid 2583] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2583] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2583] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2583] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2584 attached
<unfinished ...>
[pid 2584] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2584] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2583] <... clone resumed>, parent_tid=[2584], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2584
[pid 2583] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2584] <... futex resumed>) = 0
[pid 2584] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2583] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2584] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2584] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2583] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2583] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2584] <... futex resumed>) = 0
[pid 2583] <... futex resumed>) = 1
[pid 2584] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2583] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2584] <... mount resumed>) = 0
[pid 2584] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2584] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2583] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2583] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2584] <... futex resumed>) = 0
[pid 2584] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2583] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2584] <... mount resumed>) = 0
[pid 2584] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2583] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2584] <... futex resumed>) = 0
[pid 2584] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2583] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2584] <... futex resumed>) = 0
[pid 2583] <... futex resumed>) = 1
[pid 2584] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2583] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2584] <... umount2 resumed>) = 0
[pid 2584] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2584] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2583] <... futex resumed>) = 0
[pid 2583] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2583] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2583] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2585 attached
<unfinished ...>
[pid 2585] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2585] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2583] <... clone resumed>, parent_tid=[2585], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2585
[pid 2583] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2585] <... futex resumed>) = 0
[pid 2585] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2583] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2585] <... umount2 resumed>) = 0
[pid 2585] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2585] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2583] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2583] exit_group(0 <unfinished ...>
[pid 2584] <... futex resumed>) = ?
[pid 2583] <... exit_group resumed>) = ?
[pid 2584] +++ exited with 0 +++
[pid 2585] <... futex resumed>) = ?
[pid 2585] +++ exited with 0 +++
[pid 2583] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2583, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2586
./strace-static-x86_64: Process 2586 attached
[pid 2586] set_robust_list(0x5555560865e0, 24) = 0
[pid 2586] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2586] setpgid(0, 0) = 0
[pid 2586] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2586] write(3, "1000", 4) = 4
[pid 2586] close(3) = 0
[pid 2586] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2586] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2586] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2586] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2587], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2587
[pid 2586] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2586] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2587 attached
<unfinished ...>
[pid 2587] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2587] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2587] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2586] <... futex resumed>) = 0
[pid 2586] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2586] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2587] <... futex resumed>) = 1
[pid 2587] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2587] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2586] <... futex resumed>) = 0
[pid 2587] <... futex resumed>) = 1
[pid 2586] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2587] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2586] <... futex resumed>) = 0
[pid 2586] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2587] <... mount resumed>) = 0
[pid 2587] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2586] <... futex resumed>) = 0
[pid 2587] <... futex resumed>) = 1
[pid 2586] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2587] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2586] <... futex resumed>) = 0
[pid 2586] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2586] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2586] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2586] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2588 attached
<unfinished ...>
[pid 2587] <... umount2 resumed>) = 0
[pid 2586] <... clone resumed>, parent_tid=[2588], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2588
[pid 2588] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2587] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2588] <... set_robust_list resumed>) = 0
[pid 2586] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2587] <... futex resumed>) = 0
[pid 2588] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2586] <... futex resumed>) = 0
[pid 2587] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2586] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2588] <... umount2 resumed>) = 0
[pid 2588] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2586] <... futex resumed>) = 0
[pid 2588] <... futex resumed>) = 1
[pid 2586] exit_group(0 <unfinished ...>
[pid 2588] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2586] <... exit_group resumed>) = ?
[pid 2587] <... futex resumed>) = -1 (errno 18446744073709551414)
[pid 2588] <... futex resumed>) = ?
[pid 2587] +++ exited with 0 +++
[pid 2588] +++ exited with 0 +++
[pid 2586] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2586, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2589 attached
, child_tidptr=0x5555560865d0) = 2589
[pid 2589] set_robust_list(0x5555560865e0, 24) = 0
[pid 2589] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2589] setpgid(0, 0) = 0
[pid 2589] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2589] write(3, "1000", 4) = 4
[pid 2589] close(3) = 0
[pid 2589] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2589] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2589] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2589] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2590 attached
<unfinished ...>
[pid 2590] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2590] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2589] <... clone resumed>, parent_tid=[2590], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2590
[pid 2589] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2590] <... futex resumed>) = 0
[pid 2590] mkdir("./file0", 000 <unfinished ...>
[pid 2589] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2590] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2590] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2590] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2589] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2589] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2590] <... futex resumed>) = 0
[pid 2590] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2589] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2590] <... mount resumed>) = 0
[pid 2590] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2590] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2589] <... futex resumed>) = 0
[pid 2589] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2590] <... futex resumed>) = 0
[pid 2589] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2590] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2590] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2589] <... futex resumed>) = 0
[pid 2589] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2589] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2589] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2590] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2589] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2589] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2590] <... umount2 resumed>) = 0
[pid 2590] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2591 attached
<unfinished ...>
[pid 2589] <... clone resumed>, parent_tid=[2591], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2591
[pid 2589] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2589] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2590] <... futex resumed>) = 0
[pid 2591] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2590] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2591] umount2("./file0", MNT_DETACH) = 0
[pid 2591] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2589] <... futex resumed>) = 0
[pid 2589] exit_group(0) = ?
[pid 2590] <... futex resumed>) = ?
[pid 2590] +++ exited with 0 +++
[pid 2591] +++ exited with 0 +++
[pid 2589] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2589, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2592
./strace-static-x86_64: Process 2592 attached
[pid 2592] set_robust_list(0x5555560865e0, 24) = 0
[pid 2592] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2592] setpgid(0, 0) = 0
[pid 2592] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2592] write(3, "1000", 4) = 4
[pid 2592] close(3) = 0
[pid 2592] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2592] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2592] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2592] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2593 attached
, parent_tid=[2593], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2593
[pid 2593] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2593] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2592] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2593] <... futex resumed>) = 0
[pid 2593] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2592] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2593] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2593] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2592] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2592] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2593] <... futex resumed>) = 0
[pid 2593] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2592] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2593] <... mount resumed>) = 0
[pid 2593] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2593] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2592] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2592] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2593] <... futex resumed>) = 0
[pid 2593] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2592] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2593] <... mount resumed>) = 0
[pid 2593] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2592] <... futex resumed>) = 0
[pid 2593] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2592] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2592] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2592] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2592] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2592] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2593] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2592] <... clone resumed>, parent_tid=[2594], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2594
[pid 2592] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2592] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2594 attached
<unfinished ...>
[pid 2594] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2594] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2593] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2594] <... umount2 resumed>) = 0
[pid 2594] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2592] <... futex resumed>) = 0
[pid 2594] <... futex resumed>) = 1
[pid 2594] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2593] <... umount2 resumed>) = 0
[pid 2593] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2593] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2592] exit_group(0) = ?
[pid 2593] <... futex resumed>) = ?
[pid 2593] +++ exited with 0 +++
[pid 2594] <... futex resumed>) = ?
[pid 2594] +++ exited with 0 +++
[pid 2592] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2592, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2595
./strace-static-x86_64: Process 2595 attached
[pid 2595] set_robust_list(0x5555560865e0, 24) = 0
[pid 2595] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2595] setpgid(0, 0) = 0
[pid 2595] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2595] write(3, "1000", 4) = 4
[pid 2595] close(3) = 0
[pid 2595] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2595] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2595] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2595] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2596 attached
, parent_tid=[2596], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2596
[pid 2596] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2595] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2596] <... set_robust_list resumed>) = 0
[pid 2595] <... futex resumed>) = 0
[pid 2595] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2596] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2596] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2595] <... futex resumed>) = 0
[pid 2596] <... futex resumed>) = 1
[pid 2595] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2596] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2595] <... futex resumed>) = 0
[pid 2595] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2596] <... mount resumed>) = 0
[pid 2596] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2595] <... futex resumed>) = 0
[pid 2596] <... futex resumed>) = 1
[pid 2595] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2596] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2595] <... futex resumed>) = 0
[pid 2595] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2596] <... mount resumed>) = 0
[pid 2596] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2595] <... futex resumed>) = 0
[pid 2595] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2596] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2595] <... futex resumed>) = 0
[pid 2595] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2595] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2596] <... umount2 resumed>) = 0
[pid 2595] <... mmap resumed>) = 0x7f236e446000
[pid 2596] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2595] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2596] <... futex resumed>) = 0
[pid 2595] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2596] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2595] <... clone resumed>, parent_tid=[2597], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2597
./strace-static-x86_64: Process 2597 attached
[pid 2595] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2597] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2595] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2597] <... set_robust_list resumed>) = 0
[pid 2597] umount2("./file0", MNT_DETACH) = 0
[pid 2597] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2595] <... futex resumed>) = 0
[pid 2597] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2595] exit_group(0) = ?
[pid 2596] <... futex resumed>) = ?
[pid 2596] +++ exited with 0 +++
[pid 2597] <... futex resumed>) = ?
[pid 2597] +++ exited with 0 +++
[pid 2595] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2595, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2598
./strace-static-x86_64: Process 2598 attached
[pid 2598] set_robust_list(0x5555560865e0, 24) = 0
[pid 2598] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2598] setpgid(0, 0) = 0
[pid 2598] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2598] write(3, "1000", 4) = 4
[pid 2598] close(3) = 0
[pid 2598] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2598] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2598] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2598] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2599], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2599
[pid 2598] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2598] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2599 attached
<unfinished ...>
[pid 2599] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2599] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2599] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2598] <... futex resumed>) = 0
[pid 2598] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2598] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2599] <... futex resumed>) = 1
[pid 2599] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2599] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2598] <... futex resumed>) = 0
[pid 2598] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2598] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2599] <... futex resumed>) = 1
[pid 2599] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2599] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2598] <... futex resumed>) = 0
[pid 2599] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2598] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2599] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2598] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2599] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2598] <... futex resumed>) = 0
[pid 2598] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2598] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2598] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2599] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2600 attached
[pid 2599] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2600] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2598] <... clone resumed>, parent_tid=[2600], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2600
[pid 2599] <... futex resumed>) = 0
[pid 2598] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2600] <... set_robust_list resumed>) = 0
[pid 2599] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2598] <... futex resumed>) = 0
[pid 2600] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2598] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2600] <... umount2 resumed>) = 0
[pid 2600] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2598] <... futex resumed>) = 0
[pid 2600] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2598] exit_group(0 <unfinished ...>
[pid 2600] <... futex resumed>) = 231
[pid 2598] <... exit_group resumed>) = ?
[pid 2599] <... futex resumed>) = ?
[pid 2600] +++ exited with 0 +++
[pid 2599] +++ exited with 0 +++
[pid 2598] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2598, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2601
./strace-static-x86_64: Process 2601 attached
[pid 2601] set_robust_list(0x5555560865e0, 24) = 0
[pid 2601] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2601] setpgid(0, 0) = 0
[pid 2601] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2601] write(3, "1000", 4) = 4
[pid 2601] close(3) = 0
[pid 2601] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2601] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2601] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2601] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2602], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2602
[pid 2601] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2601] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2602 attached
<unfinished ...>
[pid 2602] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2602] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2602] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2601] <... futex resumed>) = 0
[pid 2601] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2601] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2602] <... futex resumed>) = 1
[pid 2602] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2602] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2601] <... futex resumed>) = 0
[pid 2601] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2601] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2602] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2602] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2601] <... futex resumed>) = 0
[pid 2601] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2601] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2601] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2601] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2601] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2603 attached
, parent_tid=[2603], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2603
[pid 2602] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2601] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2601] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2603] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2603] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2602] <... umount2 resumed>) = 0
[pid 2603] <... umount2 resumed>) = 0
[pid 2603] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2602] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2603] <... futex resumed>) = 1
[pid 2602] <... futex resumed>) = 0
[pid 2601] <... futex resumed>) = 0
[pid 2601] exit_group(0) = ?
[pid 2603] +++ exited with 0 +++
[pid 2602] +++ exited with 0 +++
[pid 2601] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2601, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2604 attached
, child_tidptr=0x5555560865d0) = 2604
[pid 2604] set_robust_list(0x5555560865e0, 24) = 0
[pid 2604] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2604] setpgid(0, 0) = 0
[pid 2604] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2604] write(3, "1000", 4) = 4
[pid 2604] close(3) = 0
[pid 2604] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2604] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2604] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2604] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2605], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2605
[pid 2604] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2604] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2605 attached
<unfinished ...>
[pid 2605] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2605] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2605] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2604] <... futex resumed>) = 0
[pid 2604] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2604] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2605] <... futex resumed>) = 1
[pid 2605] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2605] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2604] <... futex resumed>) = 0
[pid 2604] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2604] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2605] <... futex resumed>) = 1
[pid 2605] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2605] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2604] <... futex resumed>) = 0
[pid 2604] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2604] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2604] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2604] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2604] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2606], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2606
[pid 2604] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2604] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2605] <... futex resumed>) = 1
[pid 2605] umount2("./file0", MNT_DETACH) = 0
[pid 2605] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2605] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2606 attached
<unfinished ...>
[pid 2606] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2606] umount2("./file0", MNT_DETACH) = 0
[pid 2606] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2604] <... futex resumed>) = 0
[pid 2604] exit_group(0) = ?
[pid 2605] <... futex resumed>) = ?
[pid 2605] +++ exited with 0 +++
[pid 2606] +++ exited with 0 +++
[pid 2604] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2604, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2607
./strace-static-x86_64: Process 2607 attached
[pid 2607] set_robust_list(0x5555560865e0, 24) = 0
[pid 2607] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2607] setpgid(0, 0) = 0
[pid 2607] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2607] write(3, "1000", 4) = 4
[pid 2607] close(3) = 0
[pid 2607] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2607] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2607] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2607] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2608 attached
, parent_tid=[2608], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2608
[pid 2608] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2607] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2608] <... set_robust_list resumed>) = 0
[pid 2607] <... futex resumed>) = 0
[pid 2607] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2608] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2608] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2607] <... futex resumed>) = 0
[pid 2608] <... futex resumed>) = 1
[pid 2607] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2608] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2607] <... futex resumed>) = 0
[pid 2607] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2608] <... mount resumed>) = 0
[pid 2608] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2607] <... futex resumed>) = 0
[pid 2608] <... futex resumed>) = 1
[pid 2607] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2608] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2607] <... futex resumed>) = 0
[pid 2607] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2608] <... mount resumed>) = 0
[pid 2608] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2607] <... futex resumed>) = 0
[pid 2608] <... futex resumed>) = 1
[pid 2607] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2608] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2607] <... futex resumed>) = 0
[pid 2607] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2607] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2607] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2607] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2608] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2609 attached
[pid 2608] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2607] <... clone resumed>, parent_tid=[2609], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2609
[pid 2609] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2608] <... futex resumed>) = 0
[pid 2607] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2609] <... set_robust_list resumed>) = 0
[pid 2608] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2607] <... futex resumed>) = 0
[pid 2609] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2607] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2609] <... umount2 resumed>) = 0
[pid 2609] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2607] <... futex resumed>) = 0
[pid 2607] exit_group(0 <unfinished ...>
[pid 2609] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2607] <... exit_group resumed>) = ?
[pid 2609] <... futex resumed>) = ?
[pid 2608] <... futex resumed>) = ?
[pid 2608] +++ exited with 0 +++
[pid 2609] +++ exited with 0 +++
[pid 2607] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2607, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2610
./strace-static-x86_64: Process 2610 attached
[pid 2610] set_robust_list(0x5555560865e0, 24) = 0
[pid 2610] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2610] setpgid(0, 0) = 0
[pid 2610] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2610] write(3, "1000", 4) = 4
[pid 2610] close(3) = 0
[pid 2610] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2610] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2610] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2610] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2611 attached
, parent_tid=[2611], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2611
[pid 2611] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2610] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2611] <... set_robust_list resumed>) = 0
[pid 2610] <... futex resumed>) = 0
[pid 2610] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2611] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2611] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2610] <... futex resumed>) = 0
[pid 2611] <... futex resumed>) = 1
[pid 2610] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2611] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2610] <... futex resumed>) = 0
[pid 2610] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2611] <... mount resumed>) = 0
[pid 2611] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2610] <... futex resumed>) = 0
[pid 2610] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2611] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2610] <... futex resumed>) = 0
[pid 2610] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2611] <... mount resumed>) = 0
[pid 2611] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2610] <... futex resumed>) = 0
[pid 2611] <... futex resumed>) = 1
[pid 2610] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2611] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2610] <... futex resumed>) = 0
[pid 2610] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2610] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2610] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2610] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2612], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2612
[pid 2611] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2612 attached
[pid 2611] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2610] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2612] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2611] <... futex resumed>) = 0
[pid 2610] <... futex resumed>) = 0
[pid 2612] <... set_robust_list resumed>) = 0
[pid 2611] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2610] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2612] umount2("./file0", MNT_DETACH) = 0
[pid 2612] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2610] <... futex resumed>) = 0
[pid 2612] <... futex resumed>) = 1
[pid 2612] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2610] exit_group(0) = ?
[pid 2611] <... futex resumed>) = ?
[pid 2611] +++ exited with 0 +++
[pid 2612] <... futex resumed>) = ?
[pid 2612] +++ exited with 0 +++
[pid 2610] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2610, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2613
./strace-static-x86_64: Process 2613 attached
[pid 2613] set_robust_list(0x5555560865e0, 24) = 0
[pid 2613] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2613] setpgid(0, 0) = 0
[pid 2613] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2613] write(3, "1000", 4) = 4
[pid 2613] close(3) = 0
[pid 2613] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2613] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2613] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2613] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2614 attached
<unfinished ...>
[pid 2614] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2614] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2613] <... clone resumed>, parent_tid=[2614], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2614
[pid 2613] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2614] <... futex resumed>) = 0
[pid 2614] mkdir("./file0", 000 <unfinished ...>
[pid 2613] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2614] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2614] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2614] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2613] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2613] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2614] <... futex resumed>) = 0
[pid 2613] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2614] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2614] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2614] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2613] <... futex resumed>) = 0
[pid 2613] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2614] <... futex resumed>) = 0
[pid 2613] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2614] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2614] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2613] <... futex resumed>) = 0
[pid 2614] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2613] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2614] <... umount2 resumed>) = 0
[pid 2613] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2614] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2613] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2614] <... futex resumed>) = 0
[pid 2613] <... mmap resumed>) = 0x7f236e446000
[pid 2613] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2614] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2613] <... mprotect resumed>) = 0
[pid 2613] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2615 attached
<unfinished ...>
[pid 2615] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2613] <... clone resumed>, parent_tid=[2615], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2615
[pid 2615] <... set_robust_list resumed>) = 0
[pid 2613] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2615] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2613] <... futex resumed>) = 0
[pid 2613] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2615] <... umount2 resumed>) = 0
[pid 2615] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2613] <... futex resumed>) = 0
[pid 2613] exit_group(0) = ?
[pid 2614] <... futex resumed>) = ?
[pid 2614] +++ exited with 0 +++
[pid 2615] +++ exited with 0 +++
[pid 2613] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2613, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2616
./strace-static-x86_64: Process 2616 attached
[pid 2616] set_robust_list(0x5555560865e0, 24) = 0
[pid 2616] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2616] setpgid(0, 0) = 0
[pid 2616] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2616] write(3, "1000", 4) = 4
[pid 2616] close(3) = 0
[pid 2616] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2616] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2616] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2616] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2617 attached
, parent_tid=[2617], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2617
[pid 2617] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2616] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2617] <... set_robust_list resumed>) = 0
[pid 2616] <... futex resumed>) = 0
[pid 2616] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2617] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2617] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2616] <... futex resumed>) = 0
[pid 2617] <... futex resumed>) = 1
[pid 2616] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2617] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2616] <... futex resumed>) = 0
[pid 2616] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2617] <... mount resumed>) = 0
[pid 2617] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2616] <... futex resumed>) = 0
[pid 2617] <... futex resumed>) = 1
[pid 2616] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2617] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2616] <... futex resumed>) = 0
[pid 2616] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2617] <... mount resumed>) = 0
[pid 2617] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2616] <... futex resumed>) = 0
[pid 2617] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2616] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2616] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2616] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2616] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2616] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2617] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2618 attached
[pid 2617] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2618] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2617] <... futex resumed>) = 0
[pid 2616] <... clone resumed>, parent_tid=[2618], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2618
[pid 2618] <... set_robust_list resumed>) = 0
[pid 2617] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2616] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2616] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2618] umount2("./file0", MNT_DETACH) = 0
[pid 2618] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2616] <... futex resumed>) = 0
[pid 2616] exit_group(0) = ?
[pid 2617] <... futex resumed>) = ?
[pid 2617] +++ exited with 0 +++
[pid 2618] +++ exited with 0 +++
[pid 2616] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2616, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2619
./strace-static-x86_64: Process 2619 attached
[pid 2619] set_robust_list(0x5555560865e0, 24) = 0
[pid 2619] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2619] setpgid(0, 0) = 0
[pid 2619] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2619] write(3, "1000", 4) = 4
[pid 2619] close(3) = 0
[pid 2619] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2619] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2619] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2619] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2620 attached
, parent_tid=[2620], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2620
[pid 2620] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2620] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2619] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2620] <... futex resumed>) = 0
[pid 2619] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2620] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2620] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2620] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2619] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2619] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2620] <... futex resumed>) = 0
[pid 2619] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2620] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2620] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2620] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2619] <... futex resumed>) = 0
[pid 2619] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2619] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2620] <... futex resumed>) = 0
[pid 2620] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2620] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2619] <... futex resumed>) = 0
[pid 2620] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2619] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2620] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2619] <... futex resumed>) = 0
[pid 2619] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2619] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2619] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2620] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2619] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2621], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2621
[pid 2619] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2619] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2621 attached
<unfinished ...>
[pid 2620] <... umount2 resumed>) = 0
[pid 2620] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2621] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2621] umount2("./file0", MNT_DETACH) = 0
[pid 2621] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2619] <... futex resumed>) = 0
[pid 2619] exit_group(0) = ?
[pid 2621] <... futex resumed>) = ?
[pid 2620] <... futex resumed>) = ?
[pid 2621] +++ exited with 0 +++
[pid 2620] +++ exited with 0 +++
[pid 2619] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2619, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2622
./strace-static-x86_64: Process 2622 attached
[pid 2622] set_robust_list(0x5555560865e0, 24) = 0
[pid 2622] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2622] setpgid(0, 0) = 0
[pid 2622] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2622] write(3, "1000", 4) = 4
[pid 2622] close(3) = 0
[pid 2622] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2622] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2622] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2622] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2623 attached
, parent_tid=[2623], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2623
[pid 2623] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2623] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2622] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2623] <... futex resumed>) = 0
[pid 2623] mkdir("./file0", 000 <unfinished ...>
[pid 2622] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2623] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2623] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2623] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2622] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2622] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2623] <... futex resumed>) = 0
[pid 2622] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2623] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2623] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2622] <... futex resumed>) = 0
[pid 2623] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2622] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2623] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2623] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2622] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2623] <... mount resumed>) = 0
[pid 2623] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2622] <... futex resumed>) = 0
[pid 2623] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2622] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2623] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2622] <... futex resumed>) = 0
[pid 2622] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2622] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2622] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2623] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2622] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2623] <... umount2 resumed>) = 0
[pid 2623] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2623] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2622] <... clone resumed>, parent_tid=[2624], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2624
[pid 2622] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2622] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2624 attached
<unfinished ...>
[pid 2624] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2624] umount2("./file0", MNT_DETACH) = 0
[pid 2624] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2622] <... futex resumed>) = 0
[pid 2622] exit_group(0) = ?
[pid 2623] <... futex resumed>) = ?
[pid 2623] +++ exited with 0 +++
[pid 2624] <... futex resumed>) = ?
[pid 2624] +++ exited with 0 +++
[pid 2622] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2622, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2625
./strace-static-x86_64: Process 2625 attached
[pid 2625] set_robust_list(0x5555560865e0, 24) = 0
[pid 2625] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2625] setpgid(0, 0) = 0
[pid 2625] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2625] write(3, "1000", 4) = 4
[pid 2625] close(3) = 0
[pid 2625] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2625] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2625] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2625] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2626 attached
, parent_tid=[2626], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2626
[pid 2626] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2625] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2626] <... set_robust_list resumed>) = 0
[pid 2625] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2626] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2626] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2625] <... futex resumed>) = 0
[pid 2626] <... futex resumed>) = 1
[pid 2625] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2626] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2625] <... futex resumed>) = 0
[pid 2625] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2626] <... mount resumed>) = 0
[pid 2626] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2625] <... futex resumed>) = 0
[pid 2626] <... futex resumed>) = 1
[pid 2625] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2626] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2625] <... futex resumed>) = 0
[pid 2625] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2626] <... mount resumed>) = 0
[pid 2626] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2625] <... futex resumed>) = 0
[pid 2625] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2625] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2625] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2625] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2625] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2627], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2627
[pid 2626] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2625] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2625] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2627 attached
<unfinished ...>
[pid 2627] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2626] <... umount2 resumed>) = 0
[pid 2627] <... set_robust_list resumed>) = 0
[pid 2627] umount2("./file0", MNT_DETACH) = 0
[pid 2627] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2625] <... futex resumed>) = 0
[pid 2626] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2627] <... futex resumed>) = 1
[pid 2627] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2626] <... futex resumed>) = 0
[pid 2626] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2625] exit_group(0) = ?
[pid 2626] <... futex resumed>) = ?
[pid 2626] +++ exited with 0 +++
[pid 2627] <... futex resumed>) = ?
[pid 2627] +++ exited with 0 +++
[pid 2625] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2625, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2628
./strace-static-x86_64: Process 2628 attached
[pid 2628] set_robust_list(0x5555560865e0, 24) = 0
[pid 2628] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2628] setpgid(0, 0) = 0
[pid 2628] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2628] write(3, "1000", 4) = 4
[pid 2628] close(3) = 0
[pid 2628] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2628] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2628] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2628] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2629 attached
<unfinished ...>
[pid 2629] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2628] <... clone resumed>, parent_tid=[2629], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2629
[pid 2628] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2629] <... set_robust_list resumed>) = 0
[pid 2629] mkdir("./file0", 000 <unfinished ...>
[pid 2628] <... futex resumed>) = 0
[pid 2629] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2628] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2629] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2628] <... futex resumed>) = 0
[pid 2628] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2628] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2629] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2629] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2628] <... futex resumed>) = 0
[pid 2629] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2628] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2628] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2629] <... mount resumed>) = 0
[pid 2629] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2628] <... futex resumed>) = 0
[pid 2628] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2628] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2628] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2629] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2628] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2628] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2630 attached
<unfinished ...>
[pid 2629] <... umount2 resumed>) = 0
[pid 2628] <... clone resumed>, parent_tid=[2630], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2630
[pid 2628] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2628] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2630] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2629] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2630] <... set_robust_list resumed>) = 0
[pid 2629] <... futex resumed>) = 0
[pid 2630] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2629] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2630] <... umount2 resumed>) = 0
[pid 2630] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2628] <... futex resumed>) = 0
[pid 2630] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2628] exit_group(0) = ?
[pid 2630] <... futex resumed>) = ?
[pid 2629] <... futex resumed>) = ?
[pid 2629] +++ exited with 0 +++
[pid 2630] +++ exited with 0 +++
[pid 2628] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2628, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2631
./strace-static-x86_64: Process 2631 attached
[pid 2631] set_robust_list(0x5555560865e0, 24) = 0
[pid 2631] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2631] setpgid(0, 0) = 0
[pid 2631] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2631] write(3, "1000", 4) = 4
[pid 2631] close(3) = 0
[pid 2631] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2631] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2631] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2631] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2632], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2632
./strace-static-x86_64: Process 2632 attached
[pid 2632] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2632] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2631] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2632] <... futex resumed>) = 0
[pid 2632] mkdir("./file0", 000 <unfinished ...>
[pid 2631] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2632] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2632] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2632] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2631] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2631] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2632] <... futex resumed>) = 0
[pid 2632] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2631] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2632] <... mount resumed>) = 0
[pid 2632] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2632] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2631] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2631] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2632] <... futex resumed>) = 0
[pid 2632] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2631] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2632] <... mount resumed>) = 0
[pid 2632] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2632] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2631] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2631] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2632] <... futex resumed>) = 0
[pid 2632] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2631] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2632] <... umount2 resumed>) = 0
[pid 2632] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2632] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2631] <... futex resumed>) = 0
[pid 2631] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2631] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2631] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2633 attached
, parent_tid=[2633], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2633
[pid 2633] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2633] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2631] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2633] <... futex resumed>) = 0
[pid 2631] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2633] umount2("./file0", MNT_DETACH) = 0
[pid 2633] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2633] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2631] <... futex resumed>) = 0
[pid 2631] exit_group(0 <unfinished ...>
[pid 2632] <... futex resumed>) = ?
[pid 2631] <... exit_group resumed>) = ?
[pid 2633] <... futex resumed>) = ?
[pid 2632] +++ exited with 0 +++
[pid 2633] +++ exited with 0 +++
[pid 2631] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2631, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2634
./strace-static-x86_64: Process 2634 attached
[pid 2634] set_robust_list(0x5555560865e0, 24) = 0
[pid 2634] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2634] setpgid(0, 0) = 0
[pid 2634] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2634] write(3, "1000", 4) = 4
[pid 2634] close(3) = 0
[pid 2634] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2634] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2634] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2634] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2635], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2635
[pid 2634] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2634] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2635 attached
<unfinished ...>
[pid 2635] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2635] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2635] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2634] <... futex resumed>) = 0
[pid 2634] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2634] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2635] <... futex resumed>) = 1
[pid 2635] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2635] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2634] <... futex resumed>) = 0
[pid 2634] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2634] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2635] <... futex resumed>) = 1
[pid 2635] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2635] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2634] <... futex resumed>) = 0
[pid 2635] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2634] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2634] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2634] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2634] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2634] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2635] <... umount2 resumed>) = 0
[pid 2635] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2634] <... clone resumed>, parent_tid=[2636], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2636
[pid 2635] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2634] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2636 attached
) = 0
[pid 2634] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2636] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2636] umount2("./file0", MNT_DETACH) = 0
[pid 2636] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2634] <... futex resumed>) = 0
[pid 2636] <... futex resumed>) = 1
[pid 2634] exit_group(0 <unfinished ...>
[pid 2636] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2634] <... exit_group resumed>) = ?
[pid 2635] <... futex resumed>) = ?
[pid 2635] +++ exited with 0 +++
[pid 2636] <... futex resumed>) = ?
[pid 2636] +++ exited with 0 +++
[pid 2634] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2634, si_uid=0, si_status=0, si_utime=0, si_stime=1} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2637
./strace-static-x86_64: Process 2637 attached
[pid 2637] set_robust_list(0x5555560865e0, 24) = 0
[pid 2637] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2637] setpgid(0, 0) = 0
[pid 2637] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2637] write(3, "1000", 4) = 4
[pid 2637] close(3) = 0
[pid 2637] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2637] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2637] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2637] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2638 attached
<unfinished ...>
[pid 2638] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2637] <... clone resumed>, parent_tid=[2638], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2638
[pid 2638] <... set_robust_list resumed>) = 0
[pid 2638] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2637] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2638] <... futex resumed>) = 0
[pid 2638] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2637] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2638] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2637] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2638] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2637] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2638] <... futex resumed>) = 0
[pid 2638] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2638] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2638] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2637] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2637] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2638] <... futex resumed>) = 0
[pid 2638] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2637] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2638] <... mount resumed>) = 0
[pid 2638] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2638] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2637] <... futex resumed>) = 0
[pid 2637] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2638] <... futex resumed>) = 0
[pid 2637] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2638] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2637] <... futex resumed>) = 0
[pid 2637] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2637] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2637] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2638] <... umount2 resumed>) = 0
[pid 2638] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2638] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2639 attached
<unfinished ...>
[pid 2639] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2637] <... clone resumed>, parent_tid=[2639], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2639
[pid 2639] <... set_robust_list resumed>) = 0
[pid 2637] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2639] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2637] <... futex resumed>) = 0
[pid 2637] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2639] <... umount2 resumed>) = 0
[pid 2639] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2637] <... futex resumed>) = 0
[pid 2639] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2637] exit_group(0 <unfinished ...>
[pid 2638] <... futex resumed>) = ?
[pid 2637] <... exit_group resumed>) = ?
[pid 2638] +++ exited with 0 +++
[pid 2639] <... futex resumed>) = ?
[pid 2639] +++ exited with 0 +++
[pid 2637] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2637, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2640
./strace-static-x86_64: Process 2640 attached
[pid 2640] set_robust_list(0x5555560865e0, 24) = 0
[pid 2640] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2640] setpgid(0, 0) = 0
[pid 2640] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2640] write(3, "1000", 4) = 4
[pid 2640] close(3) = 0
[pid 2640] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2640] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2640] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2640] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2641 attached
<unfinished ...>
[pid 2641] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2641] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2640] <... clone resumed>, parent_tid=[2641], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2641
[pid 2640] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2641] <... futex resumed>) = 0
[pid 2640] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2641] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2641] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2641] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2640] <... futex resumed>) = 0
[pid 2640] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2641] <... futex resumed>) = 0
[pid 2640] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2641] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2641] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2640] <... futex resumed>) = 0
[pid 2641] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2640] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2641] <... futex resumed>) = 0
[pid 2640] <... futex resumed>) = 1
[pid 2641] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2640] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2641] <... mount resumed>) = 0
[pid 2641] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2640] <... futex resumed>) = 0
[pid 2640] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2640] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2640] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2640] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2640] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2641] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2640] <... clone resumed>, parent_tid=[2642], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2642
[pid 2640] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2640] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2642 attached
<unfinished ...>
[pid 2641] <... umount2 resumed>) = 0
[pid 2642] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2642] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2641] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2642] <... umount2 resumed>) = 0
[pid 2642] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2640] <... futex resumed>) = 0
[pid 2640] exit_group(0) = ?
[pid 2642] <... futex resumed>) = ?
[pid 2641] +++ exited with 0 +++
[pid 2642] +++ exited with 0 +++
[pid 2640] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2640, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2643
./strace-static-x86_64: Process 2643 attached
[pid 2643] set_robust_list(0x5555560865e0, 24) = 0
[pid 2643] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2643] setpgid(0, 0) = 0
[pid 2643] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2643] write(3, "1000", 4) = 4
[pid 2643] close(3) = 0
[pid 2643] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2643] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2643] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2643] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2644 attached
, parent_tid=[2644], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2644
[pid 2644] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2644] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2643] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2644] <... futex resumed>) = 0
[pid 2644] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2644] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2644] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2643] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2643] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2644] <... futex resumed>) = 0
[pid 2644] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2643] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2644] <... mount resumed>) = 0
[pid 2644] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2644] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2643] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2643] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2644] <... futex resumed>) = 0
[pid 2644] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2643] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2644] <... mount resumed>) = 0
[pid 2644] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2644] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2643] <... futex resumed>) = 0
[pid 2643] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2644] <... futex resumed>) = 0
[pid 2643] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2644] umount2("./file0", MNT_DETACH) = 0
[pid 2644] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2644] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2643] <... futex resumed>) = 0
[pid 2643] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2643] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2643] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2645 attached
<unfinished ...>
[pid 2645] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2645] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2643] <... clone resumed>, parent_tid=[2645], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2645
[pid 2643] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2645] <... futex resumed>) = 0
[pid 2645] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2643] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2645] <... umount2 resumed>) = 0
[pid 2645] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2645] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2643] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2643] exit_group(0 <unfinished ...>
[pid 2644] <... futex resumed>) = ?
[pid 2643] <... exit_group resumed>) = ?
[pid 2644] +++ exited with 0 +++
[pid 2645] <... futex resumed>) = ?
[pid 2645] +++ exited with 0 +++
[pid 2643] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2643, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2646
./strace-static-x86_64: Process 2646 attached
[pid 2646] set_robust_list(0x5555560865e0, 24) = 0
[pid 2646] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2646] setpgid(0, 0) = 0
[pid 2646] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2646] write(3, "1000", 4) = 4
[pid 2646] close(3) = 0
[pid 2646] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2646] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2646] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2646] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2647 attached
, parent_tid=[2647], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2647
[pid 2647] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2646] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2647] <... set_robust_list resumed>) = 0
[pid 2646] <... futex resumed>) = 0
[pid 2646] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2647] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2647] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2646] <... futex resumed>) = 0
[pid 2647] <... futex resumed>) = 1
[pid 2646] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2647] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2646] <... futex resumed>) = 0
[pid 2646] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2647] <... mount resumed>) = 0
[pid 2647] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2646] <... futex resumed>) = 0
[pid 2647] <... futex resumed>) = 1
[pid 2646] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2647] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2646] <... futex resumed>) = 0
[pid 2646] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2647] <... mount resumed>) = 0
[pid 2647] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2646] <... futex resumed>) = 0
[pid 2647] <... futex resumed>) = 1
[pid 2646] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2647] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2646] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2646] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2646] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2646] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2647] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2648 attached
[pid 2647] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2646] <... clone resumed>, parent_tid=[2648], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2648
[pid 2648] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2647] <... futex resumed>) = 0
[pid 2646] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2648] <... set_robust_list resumed>) = 0
[pid 2647] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2646] <... futex resumed>) = 0
[pid 2648] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2646] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2648] <... umount2 resumed>) = 0
[pid 2648] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2646] <... futex resumed>) = 0
[pid 2648] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2646] exit_group(0) = ?
[pid 2647] <... futex resumed>) = ?
[pid 2648] <... futex resumed>) = ?
[pid 2648] +++ exited with 0 +++
[pid 2647] +++ exited with 0 +++
[pid 2646] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2646, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2649
./strace-static-x86_64: Process 2649 attached
[pid 2649] set_robust_list(0x5555560865e0, 24) = 0
[pid 2649] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2649] setpgid(0, 0) = 0
[pid 2649] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2649] write(3, "1000", 4) = 4
[pid 2649] close(3) = 0
[pid 2649] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2649] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2649] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2649] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2650 attached
, parent_tid=[2650], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2650
[pid 2650] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2649] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2650] <... set_robust_list resumed>) = 0
[pid 2649] <... futex resumed>) = 0
[pid 2649] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2650] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2650] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2649] <... futex resumed>) = 0
[pid 2650] <... futex resumed>) = 1
[pid 2649] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2650] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2649] <... futex resumed>) = 0
[pid 2649] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2650] <... mount resumed>) = 0
[pid 2650] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2649] <... futex resumed>) = 0
[pid 2649] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2649] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2650] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2650] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2649] <... futex resumed>) = 0
[pid 2649] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2649] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2649] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2649] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2649] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2650] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2649] <... clone resumed>, parent_tid=[2651], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2651
[pid 2649] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2649] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2651 attached
<unfinished ...>
[pid 2650] <... umount2 resumed>) = 0
[pid 2651] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2651] umount2("./file0", MNT_DETACH) = 0
[pid 2651] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2649] <... futex resumed>) = 0
[pid 2650] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2649] exit_group(0 <unfinished ...>
[pid 2650] <... futex resumed>) = 0
[pid 2649] <... exit_group resumed>) = ?
[pid 2651] <... futex resumed>) = ?
[pid 2651] +++ exited with 0 +++
[pid 2650] +++ exited with 0 +++
[pid 2649] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2649, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2652
./strace-static-x86_64: Process 2652 attached
[pid 2652] set_robust_list(0x5555560865e0, 24) = 0
[pid 2652] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2652] setpgid(0, 0) = 0
[pid 2652] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2652] write(3, "1000", 4) = 4
[pid 2652] close(3) = 0
[pid 2652] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2652] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2652] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2652] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2653 attached
, parent_tid=[2653], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2653
[pid 2653] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2653] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2652] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2653] <... futex resumed>) = 0
[pid 2653] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2653] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2653] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2652] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2652] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2653] <... futex resumed>) = 0
[pid 2653] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2652] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2653] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2653] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2652] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2652] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2653] <... futex resumed>) = 0
[pid 2652] <... futex resumed>) = 1
[pid 2653] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2652] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2653] <... mount resumed>) = 0
[pid 2653] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2653] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2652] <... futex resumed>) = 0
[pid 2652] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2652] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2652] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2652] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2652] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2653] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
./strace-static-x86_64: Process 2654 attached
[pid 2653] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2652] <... clone resumed>, parent_tid=[2654], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2654
[pid 2653] <... umount2 resumed>) = 0
[pid 2652] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2652] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2654] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2653] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2654] <... set_robust_list resumed>) = 0
[pid 2653] <... futex resumed>) = 0
[pid 2654] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2653] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2654] <... umount2 resumed>) = 0
[pid 2654] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2652] <... futex resumed>) = 0
[pid 2652] exit_group(0 <unfinished ...>
[pid 2653] <... futex resumed>) = ?
[pid 2653] +++ exited with 0 +++
[pid 2652] <... exit_group resumed>) = ?
[pid 2654] +++ exited with 0 +++
[pid 2652] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2652, si_uid=0, si_status=0, si_utime=0, si_stime=1} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2655
./strace-static-x86_64: Process 2655 attached
[pid 2655] set_robust_list(0x5555560865e0, 24) = 0
[pid 2655] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2655] setpgid(0, 0) = 0
[pid 2655] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2655] write(3, "1000", 4) = 4
[pid 2655] close(3) = 0
[pid 2655] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2655] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2655] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2655] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2656 attached
, parent_tid=[2656], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2656
[pid 2656] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2656] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2655] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2656] <... futex resumed>) = 0
[pid 2656] mkdir("./file0", 000 <unfinished ...>
[pid 2655] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2656] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2656] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2656] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2655] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2655] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2656] <... futex resumed>) = 0
[pid 2656] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2655] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2656] <... mount resumed>) = 0
[pid 2656] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2656] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2655] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2655] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2656] <... futex resumed>) = 0
[pid 2656] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2655] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2656] <... mount resumed>) = 0
[pid 2656] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2656] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2655] <... futex resumed>) = 0
[pid 2655] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2656] <... futex resumed>) = 0
[pid 2655] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2656] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2655] <... futex resumed>) = 0
[pid 2655] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2656] <... umount2 resumed>) = 0
[pid 2655] <... mmap resumed>) = 0x7f236e446000
[pid 2656] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2655] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2656] <... futex resumed>) = 0
[pid 2655] <... mprotect resumed>) = 0
[pid 2656] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2655] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2657 attached
, parent_tid=[2657], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2657
[pid 2657] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2655] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2657] <... set_robust_list resumed>) = 0
[pid 2655] <... futex resumed>) = 0
[pid 2657] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2655] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2657] <... umount2 resumed>) = 0
[pid 2657] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2655] <... futex resumed>) = 0
[pid 2657] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2655] exit_group(0 <unfinished ...>
[pid 2657] <... futex resumed>) = ?
[pid 2656] <... futex resumed>) = ?
[pid 2655] <... exit_group resumed>) = ?
[pid 2657] +++ exited with 0 +++
[pid 2656] +++ exited with 0 +++
[pid 2655] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2655, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2658
./strace-static-x86_64: Process 2658 attached
[pid 2658] set_robust_list(0x5555560865e0, 24) = 0
[pid 2658] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2658] setpgid(0, 0) = 0
[pid 2658] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2658] write(3, "1000", 4) = 4
[pid 2658] close(3) = 0
[pid 2658] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2658] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2658] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2658] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2659 attached
<unfinished ...>
[pid 2659] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2658] <... clone resumed>, parent_tid=[2659], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2659
[pid 2659] <... set_robust_list resumed>) = 0
[pid 2658] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2659] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2659] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2659] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2658] <... futex resumed>) = 1
[pid 2659] <... futex resumed>) = 0
[pid 2659] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2658] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2658] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2659] <... futex resumed>) = 0
[pid 2659] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2658] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2659] <... mount resumed>) = 0
[pid 2659] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2659] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2658] <... futex resumed>) = 0
[pid 2658] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2658] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2659] <... futex resumed>) = 0
[pid 2659] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2659] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2658] <... futex resumed>) = 0
[pid 2658] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2658] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2658] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2658] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2659] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2658] <... mprotect resumed>) = 0
[pid 2658] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2659] <... umount2 resumed>) = 0
[pid 2658] <... clone resumed>, parent_tid=[2660], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2660
[pid 2658] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2658] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2660 attached
<unfinished ...>
[pid 2660] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2660] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2659] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2659] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2660] <... umount2 resumed>) = 0
[pid 2660] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2658] <... futex resumed>) = 0
[pid 2658] exit_group(0) = ?
[pid 2660] <... futex resumed>) = ?
[pid 2659] <... futex resumed>) = ?
[pid 2660] +++ exited with 0 +++
[pid 2659] +++ exited with 0 +++
[pid 2658] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2658, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2661
./strace-static-x86_64: Process 2661 attached
[pid 2661] set_robust_list(0x5555560865e0, 24) = 0
[pid 2661] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2661] setpgid(0, 0) = 0
[pid 2661] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2661] write(3, "1000", 4) = 4
[pid 2661] close(3) = 0
[pid 2661] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2661] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2661] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2661] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2662 attached
<unfinished ...>
[pid 2662] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2662] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2661] <... clone resumed>, parent_tid=[2662], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2662
[pid 2661] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2662] <... futex resumed>) = 0
[pid 2662] mkdir("./file0", 000 <unfinished ...>
[pid 2661] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2662] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2662] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2662] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2661] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2661] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2662] <... futex resumed>) = 0
[pid 2662] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2661] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2662] <... mount resumed>) = 0
[pid 2662] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2662] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2661] <... futex resumed>) = 0
[pid 2661] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2661] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2662] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2662] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2662] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2661] <... futex resumed>) = 0
[pid 2661] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2661] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2661] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2661] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2662] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2661] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2663], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2663
[pid 2661] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2662] <... umount2 resumed>) = 0
[pid 2662] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2661] <... futex resumed>) = 0
[pid 2662] <... futex resumed>) = 0
[pid 2661] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2663 attached
<unfinished ...>
[pid 2662] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2663] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2663] umount2("./file0", MNT_DETACH) = 0
[pid 2663] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2661] <... futex resumed>) = 0
[pid 2661] exit_group(0 <unfinished ...>
[pid 2662] <... futex resumed>) = ?
[pid 2661] <... exit_group resumed>) = ?
[pid 2663] <... futex resumed>) = ?
[pid 2662] +++ exited with 0 +++
[pid 2663] +++ exited with 0 +++
[pid 2661] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2661, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2664
./strace-static-x86_64: Process 2664 attached
[pid 2664] set_robust_list(0x5555560865e0, 24) = 0
[pid 2664] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2664] setpgid(0, 0) = 0
[pid 2664] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2664] write(3, "1000", 4) = 4
[pid 2664] close(3) = 0
[pid 2664] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2664] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2664] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2664] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2665 attached
, parent_tid=[2665], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2665
[pid 2665] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2664] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2665] <... set_robust_list resumed>) = 0
[pid 2664] <... futex resumed>) = 0
[pid 2664] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2665] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2665] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2664] <... futex resumed>) = 0
[pid 2664] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2664] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2665] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2665] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2664] <... futex resumed>) = 0
[pid 2664] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2665] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2664] <... futex resumed>) = 0
[pid 2664] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2665] <... mount resumed>) = 0
[pid 2665] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2664] <... futex resumed>) = 0
[pid 2664] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2664] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2664] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2665] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2664] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2665] <... umount2 resumed>) = 0
[pid 2664] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2665] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2666 attached
<unfinished ...>
[pid 2664] <... clone resumed>, parent_tid=[2666], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2666
[pid 2664] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2666] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2665] <... futex resumed>) = 0
[pid 2664] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2666] <... set_robust_list resumed>) = 0
[pid 2665] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2666] umount2("./file0", MNT_DETACH) = 0
[pid 2666] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2664] <... futex resumed>) = 0
[pid 2666] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2664] exit_group(0 <unfinished ...>
[pid 2665] <... futex resumed>) = ?
[pid 2664] <... exit_group resumed>) = ?
[pid 2665] +++ exited with 0 +++
[pid 2666] <... futex resumed>) = ?
[pid 2666] +++ exited with 0 +++
[pid 2664] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2664, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2667
./strace-static-x86_64: Process 2667 attached
[pid 2667] set_robust_list(0x5555560865e0, 24) = 0
[pid 2667] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2667] setpgid(0, 0) = 0
[pid 2667] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2667] write(3, "1000", 4) = 4
[pid 2667] close(3) = 0
[pid 2667] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2667] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2667] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2667] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2668], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2668
[pid 2667] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2667] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2668 attached
<unfinished ...>
[pid 2668] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2668] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2668] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2667] <... futex resumed>) = 0
[pid 2667] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2667] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2668] <... futex resumed>) = 1
[pid 2668] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2668] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2667] <... futex resumed>) = 0
[pid 2667] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2667] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2668] <... futex resumed>) = 1
[pid 2668] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2668] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2667] <... futex resumed>) = 0
[pid 2667] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2667] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2667] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2667] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2667] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2669 attached
, parent_tid=[2669], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2669
[pid 2667] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2669] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2667] <... futex resumed>) = 0
[pid 2667] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2668] <... futex resumed>) = 1
[pid 2668] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2669] <... set_robust_list resumed>) = 0
[pid 2669] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2668] <... umount2 resumed>) = 0
[pid 2668] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2668] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2669] <... umount2 resumed>) = 0
[pid 2669] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2667] <... futex resumed>) = 0
[pid 2667] exit_group(0) = ?
[pid 2668] <... futex resumed>) = ?
[pid 2668] +++ exited with 0 +++
[pid 2669] +++ exited with 0 +++
[pid 2667] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2667, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2670
./strace-static-x86_64: Process 2670 attached
[pid 2670] set_robust_list(0x5555560865e0, 24) = 0
[pid 2670] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2670] setpgid(0, 0) = 0
[pid 2670] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2670] write(3, "1000", 4) = 4
[pid 2670] close(3) = 0
[pid 2670] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2670] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2670] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2670] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2671 attached
, parent_tid=[2671], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2671
[pid 2670] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2670] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2671] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2671] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2671] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2670] <... futex resumed>) = 0
[pid 2670] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2670] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2671] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2671] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2670] <... futex resumed>) = 0
[pid 2670] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2670] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2671] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2671] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2670] <... futex resumed>) = 0
[pid 2671] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2670] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2670] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2670] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2670] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2670] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2671] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2671] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2670] <... clone resumed>, parent_tid=[2672], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2672
[pid 2670] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2670] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2672 attached
<unfinished ...>
[pid 2672] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2672] umount2("./file0", MNT_DETACH) = 0
[pid 2672] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2670] <... futex resumed>) = 0
[pid 2672] <... futex resumed>) = 1
[pid 2672] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2671] <... umount2 resumed>) = 0
[pid 2671] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2671] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2670] exit_group(0) = ?
[pid 2671] <... futex resumed>) = ?
[pid 2672] <... futex resumed>) = ?
[pid 2671] +++ exited with 0 +++
[pid 2672] +++ exited with 0 +++
[pid 2670] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2670, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2673
./strace-static-x86_64: Process 2673 attached
[pid 2673] set_robust_list(0x5555560865e0, 24) = 0
[pid 2673] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2673] setpgid(0, 0) = 0
[pid 2673] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2673] write(3, "1000", 4) = 4
[pid 2673] close(3) = 0
[pid 2673] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2673] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2673] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2673] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2674], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2674
[pid 2673] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2673] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2674 attached
<unfinished ...>
[pid 2674] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2674] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2674] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2673] <... futex resumed>) = 0
[pid 2673] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2673] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2674] <... futex resumed>) = 1
[pid 2674] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2674] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2673] <... futex resumed>) = 0
[pid 2673] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2673] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2674] <... futex resumed>) = 1
[pid 2674] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2674] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2673] <... futex resumed>) = 0
[pid 2674] <... futex resumed>) = 1
[pid 2673] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2674] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2673] <... futex resumed>) = 0
[pid 2673] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2673] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2673] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2674] <... umount2 resumed>) = 0
[pid 2673] <... mprotect resumed>) = 0
[pid 2674] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2673] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2674] <... futex resumed>) = 0
[pid 2674] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2675 attached
<unfinished ...>
[pid 2673] <... clone resumed>, parent_tid=[2675], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2675
[pid 2675] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2673] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2675] <... set_robust_list resumed>) = 0
[pid 2673] <... futex resumed>) = 0
[pid 2675] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2673] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2675] <... umount2 resumed>) = 0
[pid 2675] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2673] <... futex resumed>) = 0
[pid 2675] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2673] exit_group(0) = ?
[pid 2674] <... futex resumed>) = ?
[pid 2674] +++ exited with 0 +++
[pid 2675] <... futex resumed>) = 230
[pid 2675] +++ exited with 0 +++
[pid 2673] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2673, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2676
./strace-static-x86_64: Process 2676 attached
[pid 2676] set_robust_list(0x5555560865e0, 24) = 0
[pid 2676] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2676] setpgid(0, 0) = 0
[pid 2676] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2676] write(3, "1000", 4) = 4
[pid 2676] close(3) = 0
[pid 2676] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2676] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2676] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2676] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2677 attached
<unfinished ...>
[pid 2677] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2677] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2676] <... clone resumed>, parent_tid=[2677], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2677
[pid 2676] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2677] <... futex resumed>) = 0
[pid 2677] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2677] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2677] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2676] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2676] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2677] <... futex resumed>) = 0
[pid 2677] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2676] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2677] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2677] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2676] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2676] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2677] <... futex resumed>) = 0
[pid 2677] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2676] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2677] <... mount resumed>) = 0
[pid 2677] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2677] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2676] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2676] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2677] <... futex resumed>) = 0
[pid 2677] umount2("./file0", MNT_DETACH) = 0
[pid 2677] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2677] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2676] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2677] <... futex resumed>) = 0
[pid 2677] umount2("./file0", MNT_DETACH) = 0
[pid 2676] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2677] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2677] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2676] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2676] exit_group(0) = ?
[pid 2677] <... futex resumed>) = ?
[pid 2677] +++ exited with 0 +++
[pid 2676] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2676, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2678
./strace-static-x86_64: Process 2678 attached
[pid 2678] set_robust_list(0x5555560865e0, 24) = 0
[pid 2678] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2678] setpgid(0, 0) = 0
[pid 2678] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2678] write(3, "1000", 4) = 4
[pid 2678] close(3) = 0
[pid 2678] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2678] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2678] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2678] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2679 attached
<unfinished ...>
[pid 2679] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2679] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2678] <... clone resumed>, parent_tid=[2679], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2679
[pid 2678] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2679] <... futex resumed>) = 0
[pid 2679] mkdir("./file0", 000 <unfinished ...>
[pid 2678] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2679] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2679] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2678] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2678] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2679] <... futex resumed>) = 0
[pid 2678] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2679] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2679] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2679] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2678] <... futex resumed>) = 0
[pid 2678] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2679] <... futex resumed>) = 0
[pid 2678] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2679] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2679] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2678] <... futex resumed>) = 0
[pid 2679] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2678] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2678] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2678] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2678] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2678] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2680], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2680
[pid 2679] <... umount2 resumed>) = 0
[pid 2678] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2679] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2678] <... futex resumed>) = 0
[pid 2679] <... futex resumed>) = 0
[pid 2678] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2679] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2680 attached
<unfinished ...>
[pid 2680] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2680] umount2("./file0", MNT_DETACH) = 0
[pid 2680] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2678] <... futex resumed>) = 0
[pid 2678] exit_group(0) = ?
[pid 2679] <... futex resumed>) = ?
[pid 2679] +++ exited with 0 +++
[pid 2680] +++ exited with 0 +++
[pid 2678] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2678, si_uid=0, si_status=0, si_utime=0, si_stime=1} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2681
./strace-static-x86_64: Process 2681 attached
[pid 2681] set_robust_list(0x5555560865e0, 24) = 0
[pid 2681] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2681] setpgid(0, 0) = 0
[pid 2681] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2681] write(3, "1000", 4) = 4
[pid 2681] close(3) = 0
[pid 2681] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2681] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2681] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2681] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2682 attached
, parent_tid=[2682], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2682
[pid 2682] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2682] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2681] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2682] <... futex resumed>) = 0
[pid 2682] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2682] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2682] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2681] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2681] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2682] <... futex resumed>) = 0
[pid 2682] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2682] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2682] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2681] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2681] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2682] <... futex resumed>) = 0
[pid 2681] <... futex resumed>) = 1
[pid 2682] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2681] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2682] <... mount resumed>) = 0
[pid 2682] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2682] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2681] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2681] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2682] <... futex resumed>) = 0
[pid 2681] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2682] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2681] <... futex resumed>) = 0
[pid 2682] <... umount2 resumed>) = 0
[pid 2682] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2682] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2681] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2681] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2681] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2683 attached
, parent_tid=[2683], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2683
[pid 2683] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2683] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2681] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2683] <... futex resumed>) = 0
[pid 2681] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2683] umount2("./file0", MNT_DETACH) = 0
[pid 2683] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2681] <... futex resumed>) = 0
[pid 2683] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2681] exit_group(0 <unfinished ...>
[pid 2682] <... futex resumed>) = ?
[pid 2681] <... exit_group resumed>) = ?
[pid 2682] +++ exited with 0 +++
[pid 2683] <... futex resumed>) = ?
[pid 2683] +++ exited with 0 +++
[pid 2681] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2681, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2684
./strace-static-x86_64: Process 2684 attached
[pid 2684] set_robust_list(0x5555560865e0, 24) = 0
[pid 2684] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2684] setpgid(0, 0) = 0
[pid 2684] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2684] write(3, "1000", 4) = 4
[pid 2684] close(3) = 0
[pid 2684] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2684] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2684] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2684] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2685], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2685
[pid 2684] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2684] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2685 attached
<unfinished ...>
[pid 2685] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2685] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2685] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2684] <... futex resumed>) = 0
[pid 2684] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2684] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2685] <... futex resumed>) = 1
[pid 2685] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2685] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2684] <... futex resumed>) = 0
[pid 2684] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2684] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2685] <... futex resumed>) = 1
[pid 2685] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2685] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2684] <... futex resumed>) = 0
[pid 2684] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2684] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2684] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2684] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2684] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2686 attached
<unfinished ...>
[pid 2685] <... futex resumed>) = 1
[pid 2684] <... clone resumed>, parent_tid=[2686], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2686
[pid 2686] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2685] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2686] <... set_robust_list resumed>) = 0
[pid 2684] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2684] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2686] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2685] <... umount2 resumed>) = 0
[pid 2685] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2685] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2686] <... umount2 resumed>) = 0
[pid 2686] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2684] <... futex resumed>) = 0
[pid 2686] <... futex resumed>) = 1
[pid 2686] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2684] exit_group(0) = ?
[pid 2685] <... futex resumed>) = 231
[pid 2686] <... futex resumed>) = ?
[pid 2685] +++ exited with 0 +++
[pid 2686] +++ exited with 0 +++
[pid 2684] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2684, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2687
./strace-static-x86_64: Process 2687 attached
[pid 2687] set_robust_list(0x5555560865e0, 24) = 0
[pid 2687] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2687] setpgid(0, 0) = 0
[pid 2687] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2687] write(3, "1000", 4) = 4
[pid 2687] close(3) = 0
[pid 2687] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2687] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2687] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2687] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2688 attached
, parent_tid=[2688], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2688
[pid 2688] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2688] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2687] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2688] <... futex resumed>) = 0
[pid 2688] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2688] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2688] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2687] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2687] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2688] <... futex resumed>) = 0
[pid 2687] <... futex resumed>) = 1
[pid 2688] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2687] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2688] <... mount resumed>) = 0
[pid 2688] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2688] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2687] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2687] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2688] <... futex resumed>) = 0
[pid 2687] <... futex resumed>) = 1
[pid 2688] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2687] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2688] <... mount resumed>) = 0
[pid 2688] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2688] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2687] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2687] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2688] <... futex resumed>) = 0
[pid 2688] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2687] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2688] <... umount2 resumed>) = 0
[pid 2687] <... futex resumed>) = 0
[pid 2688] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2688] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2687] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2687] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2687] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2689 attached
, parent_tid=[2689], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2689
[pid 2689] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2689] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2687] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2689] <... futex resumed>) = 0
[pid 2689] umount2("./file0", MNT_DETACH) = 0
[pid 2689] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2689] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2687] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2687] exit_group(0 <unfinished ...>
[pid 2688] <... futex resumed>) = ?
[pid 2687] <... exit_group resumed>) = ?
[pid 2688] +++ exited with 0 +++
[pid 2689] <... futex resumed>) = ?
[pid 2689] +++ exited with 0 +++
[pid 2687] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2687, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2690
./strace-static-x86_64: Process 2690 attached
[pid 2690] set_robust_list(0x5555560865e0, 24) = 0
[pid 2690] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2690] setpgid(0, 0) = 0
[pid 2690] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2690] write(3, "1000", 4) = 4
[pid 2690] close(3) = 0
[pid 2690] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2690] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2690] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2690] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2691 attached
, parent_tid=[2691], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2691
[pid 2691] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2690] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2691] <... set_robust_list resumed>) = 0
[pid 2690] <... futex resumed>) = 0
[pid 2690] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2691] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2691] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2690] <... futex resumed>) = 0
[pid 2690] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2691] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2690] <... futex resumed>) = 0
[pid 2690] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2691] <... mount resumed>) = 0
[pid 2691] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2690] <... futex resumed>) = 0
[pid 2691] <... futex resumed>) = 1
[pid 2690] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2690] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2691] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2691] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2690] <... futex resumed>) = 0
[pid 2690] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2690] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2690] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2690] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2690] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2692 attached
, parent_tid=[2692], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2692
[pid 2692] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2690] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2690] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2691] <... futex resumed>) = 1
[pid 2691] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2692] <... set_robust_list resumed>) = 0
[pid 2691] <... umount2 resumed>) = 0
[pid 2691] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2691] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2692] umount2("./file0", MNT_DETACH) = 0
[pid 2692] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2690] <... futex resumed>) = 0
[pid 2690] exit_group(0) = ?
[pid 2691] <... futex resumed>) = ?
[pid 2691] +++ exited with 0 +++
[pid 2692] +++ exited with 0 +++
[pid 2690] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2690, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2693
./strace-static-x86_64: Process 2693 attached
[pid 2693] set_robust_list(0x5555560865e0, 24) = 0
[pid 2693] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2693] setpgid(0, 0) = 0
[pid 2693] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2693] write(3, "1000", 4) = 4
[pid 2693] close(3) = 0
[pid 2693] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2693] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2693] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2693] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2694], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2694
./strace-static-x86_64: Process 2694 attached
[pid 2694] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2694] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2693] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2694] <... futex resumed>) = 0
[pid 2693] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2694] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2694] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2694] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2693] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2693] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2694] <... futex resumed>) = 0
[pid 2693] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2694] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2694] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2694] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2693] <... futex resumed>) = 0
[pid 2693] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2694] <... futex resumed>) = 0
[pid 2693] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2694] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2694] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2693] <... futex resumed>) = 0
[pid 2694] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2693] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2693] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2693] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2693] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2693] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2694] <... umount2 resumed>) = 0
[pid 2694] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2693] <... clone resumed>, parent_tid=[2695], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2695
[pid 2694] <... futex resumed>) = 0
[pid 2693] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2694] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2693] <... futex resumed>) = 0
[pid 2693] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2695 attached
<unfinished ...>
[pid 2695] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2695] umount2("./file0", MNT_DETACH) = 0
[pid 2695] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2693] <... futex resumed>) = 0
[pid 2695] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2693] exit_group(0) = ?
[pid 2694] <... futex resumed>) = ?
[pid 2694] +++ exited with 0 +++
[pid 2695] <... futex resumed>) = ?
[pid 2695] +++ exited with 0 +++
[pid 2693] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2693, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2696
./strace-static-x86_64: Process 2696 attached
[pid 2696] set_robust_list(0x5555560865e0, 24) = 0
[pid 2696] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2696] setpgid(0, 0) = 0
[pid 2696] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2696] write(3, "1000", 4) = 4
[pid 2696] close(3) = 0
[pid 2696] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2696] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2696] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2696] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2697], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2697
[pid 2696] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2696] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2697 attached
<unfinished ...>
[pid 2697] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2697] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2697] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2696] <... futex resumed>) = 0
[pid 2696] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2696] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2697] <... futex resumed>) = 1
[pid 2697] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2697] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2696] <... futex resumed>) = 0
[pid 2696] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2696] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2697] <... futex resumed>) = 1
[pid 2697] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2697] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2696] <... futex resumed>) = 0
[pid 2696] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2696] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2696] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2696] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2696] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2698 attached
, parent_tid=[2698], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2698
[pid 2696] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2696] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2697] <... futex resumed>) = 1
[pid 2697] umount2("./file0", MNT_DETACH) = 0
[pid 2697] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2697] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2698] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2698] umount2("./file0", MNT_DETACH) = 0
[pid 2698] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2696] <... futex resumed>) = 0
[pid 2696] exit_group(0 <unfinished ...>
[pid 2698] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2696] <... exit_group resumed>) = ?
[pid 2697] <... futex resumed>) = ?
[pid 2697] +++ exited with 0 +++
[pid 2698] <... futex resumed>) = ?
[pid 2698] +++ exited with 0 +++
[pid 2696] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2696, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2699
./strace-static-x86_64: Process 2699 attached
[pid 2699] set_robust_list(0x5555560865e0, 24) = 0
[pid 2699] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2699] setpgid(0, 0) = 0
[pid 2699] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2699] write(3, "1000", 4) = 4
[pid 2699] close(3) = 0
[pid 2699] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2699] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2699] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2699] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2700 attached
<unfinished ...>
[pid 2700] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2700] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2699] <... clone resumed>, parent_tid=[2700], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2700
[pid 2699] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2700] <... futex resumed>) = 0
[pid 2700] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2700] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2700] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2699] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2699] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2700] <... futex resumed>) = 0
[pid 2699] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2700] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2700] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2699] <... futex resumed>) = 0
[pid 2699] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2699] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2700] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2700] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2699] <... futex resumed>) = 0
[pid 2700] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2699] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2699] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2700] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2700] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2699] <... futex resumed>) = 0
[pid 2699] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2699] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2699] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2700] <... umount2 resumed>) = 0
[pid 2699] <... clone resumed>, parent_tid=[2701], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2701
[pid 2699] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2699] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2701 attached
<unfinished ...>
[pid 2701] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2701] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2700] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2700] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2701] <... umount2 resumed>) = 0
[pid 2701] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2699] <... futex resumed>) = 0
[pid 2699] exit_group(0) = ?
[pid 2700] <... futex resumed>) = ?
[pid 2700] +++ exited with 0 +++
[pid 2701] <... futex resumed>) = ?
[pid 2701] +++ exited with 0 +++
[pid 2699] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2699, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2702
./strace-static-x86_64: Process 2702 attached
[pid 2702] set_robust_list(0x5555560865e0, 24) = 0
[pid 2702] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2702] setpgid(0, 0) = 0
[pid 2702] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2702] write(3, "1000", 4) = 4
[pid 2702] close(3) = 0
[pid 2702] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2702] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2702] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2702] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2703 attached
<unfinished ...>
[pid 2703] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2703] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2702] <... clone resumed>, parent_tid=[2703], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2703
[pid 2702] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2703] <... futex resumed>) = 0
[pid 2702] <... futex resumed>) = 1
[pid 2703] mkdir("./file0", 000 <unfinished ...>
[pid 2702] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2703] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2703] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2702] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2703] <... futex resumed>) = 0
[pid 2703] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2702] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2703] <... futex resumed>) = 0
[pid 2703] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2702] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2703] <... mount resumed>) = 0
[pid 2703] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2703] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2702] <... futex resumed>) = 0
[pid 2702] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2703] <... futex resumed>) = 0
[pid 2702] <... futex resumed>) = 1
[pid 2703] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2702] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2703] <... mount resumed>) = 0
[pid 2703] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2702] <... futex resumed>) = 0
[pid 2702] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2703] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2702] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2702] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2703] <... umount2 resumed>) = 0
[pid 2702] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2703] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2702] <... mprotect resumed>) = 0
[pid 2702] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2703] <... futex resumed>) = 0
./strace-static-x86_64: Process 2704 attached
[pid 2704] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2704] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2703] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2702] <... clone resumed>, parent_tid=[2704], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2704
[pid 2702] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2704] <... futex resumed>) = 0
[pid 2702] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2704] umount2("./file0", MNT_DETACH) = 0
[pid 2704] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2702] <... futex resumed>) = 0
[pid 2702] exit_group(0) = ?
[pid 2703] <... futex resumed>) = ?
[pid 2703] +++ exited with 0 +++
[pid 2704] +++ exited with 0 +++
[pid 2702] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2702, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2705
./strace-static-x86_64: Process 2705 attached
[pid 2705] set_robust_list(0x5555560865e0, 24) = 0
[pid 2705] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2705] setpgid(0, 0) = 0
[pid 2705] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2705] write(3, "1000", 4) = 4
[pid 2705] close(3) = 0
[pid 2705] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2705] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2705] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2705] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2706 attached
, parent_tid=[2706], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2706
[pid 2706] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2706] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2705] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2706] <... futex resumed>) = 0
[pid 2705] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2706] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2706] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2706] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2705] <... futex resumed>) = 0
[pid 2705] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2706] <... futex resumed>) = 0
[pid 2706] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2705] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2706] <... mount resumed>) = 0
[pid 2706] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2705] <... futex resumed>) = 0
[pid 2705] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2705] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2706] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2706] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2705] <... futex resumed>) = 0
[pid 2705] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2705] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2705] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2705] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2705] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2706] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2705] <... clone resumed>, parent_tid=[2707], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2707
[pid 2705] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2705] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2707 attached
<unfinished ...>
[pid 2707] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2707] umount2("./file0", MNT_DETACH) = 0
[pid 2707] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2705] <... futex resumed>) = 0
[pid 2706] <... umount2 resumed>) = 0
[pid 2707] <... futex resumed>) = 1
[pid 2707] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2706] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2706] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2705] exit_group(0) = ?
[pid 2706] <... futex resumed>) = ? <unavailable>
[pid 2707] <... futex resumed>) = ?
[pid 2706] +++ exited with 0 +++
[pid 2707] +++ exited with 0 +++
[pid 2705] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2705, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2708
./strace-static-x86_64: Process 2708 attached
[pid 2708] set_robust_list(0x5555560865e0, 24) = 0
[pid 2708] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2708] setpgid(0, 0) = 0
[pid 2708] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2708] write(3, "1000", 4) = 4
[pid 2708] close(3) = 0
[pid 2708] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2708] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2708] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2708] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2709 attached
<unfinished ...>
[pid 2709] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2708] <... clone resumed>, parent_tid=[2709], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2709
[pid 2709] <... set_robust_list resumed>) = 0
[pid 2708] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2709] mkdir("./file0", 000 <unfinished ...>
[pid 2708] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2709] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2709] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2708] <... futex resumed>) = 0
[pid 2709] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2708] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2708] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2709] <... mount resumed>) = 0
[pid 2709] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2708] <... futex resumed>) = 0
[pid 2708] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2708] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2709] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2709] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2708] <... futex resumed>) = 0
[pid 2708] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2708] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2708] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2708] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2708] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2710 attached
, parent_tid=[2710], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2710
[pid 2710] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2708] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2710] <... set_robust_list resumed>) = 0
[pid 2708] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2710] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2709] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2710] <... umount2 resumed>) = 0
[pid 2710] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2708] <... futex resumed>) = 0
[pid 2710] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2709] <... umount2 resumed>) = 0
[pid 2709] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2709] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2708] exit_group(0) = ?
[pid 2710] <... futex resumed>) = ?
[pid 2709] <... futex resumed>) = ?
[pid 2709] +++ exited with 0 +++
[pid 2710] +++ exited with 0 +++
[pid 2708] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2708, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2711
./strace-static-x86_64: Process 2711 attached
[pid 2711] set_robust_list(0x5555560865e0, 24) = 0
[pid 2711] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2711] setpgid(0, 0) = 0
[pid 2711] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2711] write(3, "1000", 4) = 4
[pid 2711] close(3) = 0
[pid 2711] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2711] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2711] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2711] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2712 attached
<unfinished ...>
[pid 2712] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2711] <... clone resumed>, parent_tid=[2712], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2712
[pid 2712] <... set_robust_list resumed>) = 0
[pid 2711] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2711] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2712] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2712] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2711] <... futex resumed>) = 0
[pid 2711] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2711] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2712] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2712] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2711] <... futex resumed>) = 0
[pid 2711] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2711] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2712] <... futex resumed>) = 1
[pid 2712] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2712] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2711] <... futex resumed>) = 0
[pid 2711] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2711] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2711] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2711] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2711] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2713], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2713
./strace-static-x86_64: Process 2713 attached
[pid 2711] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2713] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2711] <... futex resumed>) = 0
[pid 2711] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2712] <... futex resumed>) = 1
[pid 2713] <... set_robust_list resumed>) = 0
[pid 2712] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2713] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2712] <... umount2 resumed>) = 0
[pid 2712] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2712] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2713] <... umount2 resumed>) = 0
[pid 2713] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2711] <... futex resumed>) = 0
[pid 2711] exit_group(0) = ?
[pid 2713] +++ exited with 0 +++
[pid 2712] <... futex resumed>) = ?
[pid 2712] +++ exited with 0 +++
[pid 2711] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2711, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2714 attached
, child_tidptr=0x5555560865d0) = 2714
[pid 2714] set_robust_list(0x5555560865e0, 24) = 0
[pid 2714] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2714] setpgid(0, 0) = 0
[pid 2714] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2714] write(3, "1000", 4) = 4
[pid 2714] close(3) = 0
[pid 2714] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2714] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2714] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2714] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2715 attached
, parent_tid=[2715], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2715
[pid 2715] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2714] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2715] <... set_robust_list resumed>) = 0
[pid 2714] <... futex resumed>) = 0
[pid 2714] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2715] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2715] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2714] <... futex resumed>) = 0
[pid 2715] <... futex resumed>) = 1
[pid 2715] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2714] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2714] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2715] <... mount resumed>) = 0
[pid 2715] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2714] <... futex resumed>) = 0
[pid 2715] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2714] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2714] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2715] <... mount resumed>) = 0
[pid 2715] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2714] <... futex resumed>) = 0
[pid 2715] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2714] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2714] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2714] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2714] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2715] <... umount2 resumed>) = 0
[pid 2714] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2716 attached
, parent_tid=[2716], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2716
[pid 2716] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2714] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2716] <... set_robust_list resumed>) = 0
[pid 2714] <... futex resumed>) = 0
[pid 2714] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2716] umount2("./file0", MNT_DETACH) = 0
[pid 2716] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2714] <... futex resumed>) = 0
[pid 2716] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2715] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2715] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2714] exit_group(0) = ?
[pid 2716] <... futex resumed>) = ?
[pid 2716] +++ exited with 0 +++
[pid 2715] <... futex resumed>) = ?
[pid 2715] +++ exited with 0 +++
[pid 2714] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2714, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2717
./strace-static-x86_64: Process 2717 attached
[pid 2717] set_robust_list(0x5555560865e0, 24) = 0
[pid 2717] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2717] setpgid(0, 0) = 0
[pid 2717] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2717] write(3, "1000", 4) = 4
[pid 2717] close(3) = 0
[pid 2717] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2717] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2717] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2717] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2718 attached
, parent_tid=[2718], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2718
[pid 2718] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2718] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2717] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2718] <... futex resumed>) = 0
[pid 2718] mkdir("./file0", 000 <unfinished ...>
[pid 2717] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2718] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2718] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2718] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2717] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2717] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2718] <... futex resumed>) = 0
[pid 2717] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2718] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2718] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2718] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2717] <... futex resumed>) = 0
[pid 2717] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2718] <... futex resumed>) = 0
[pid 2718] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2717] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2718] <... mount resumed>) = 0
[pid 2718] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2718] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2717] <... futex resumed>) = 0
[pid 2717] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2718] <... futex resumed>) = 0
[pid 2718] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2717] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2717] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2717] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2718] <... umount2 resumed>) = 0
[pid 2718] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2718] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2717] <... mprotect resumed>) = 0
[pid 2717] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2719 attached
, parent_tid=[2719], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2719
[pid 2719] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2719] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2717] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2719] <... futex resumed>) = 0
[pid 2719] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2717] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2719] <... umount2 resumed>) = 0
[pid 2719] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2717] <... futex resumed>) = 0
[pid 2717] exit_group(0 <unfinished ...>
[pid 2718] <... futex resumed>) = ?
[pid 2718] +++ exited with 0 +++
[pid 2717] <... exit_group resumed>) = ?
[pid 2719] +++ exited with 0 +++
[pid 2717] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2717, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2720
./strace-static-x86_64: Process 2720 attached
[pid 2720] set_robust_list(0x5555560865e0, 24) = 0
[pid 2720] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2720] setpgid(0, 0) = 0
[pid 2720] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2720] write(3, "1000", 4) = 4
[pid 2720] close(3) = 0
[pid 2720] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2720] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2720] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2720] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2721 attached
<unfinished ...>
[pid 2721] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2721] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2720] <... clone resumed>, parent_tid=[2721], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2721
[pid 2720] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2721] <... futex resumed>) = 0
[pid 2720] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2721] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2721] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2721] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2720] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2720] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2721] <... futex resumed>) = 0
[pid 2721] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2720] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2721] <... mount resumed>) = 0
[pid 2721] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2720] <... futex resumed>) = 0
[pid 2721] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2720] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2721] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2720] <... futex resumed>) = 0
[pid 2721] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2720] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2721] <... mount resumed>) = 0
[pid 2721] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2721] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2720] <... futex resumed>) = 0
[pid 2720] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2720] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2720] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2721] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2721] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2720] <... mmap resumed>) = 0x7f236e446000
[pid 2720] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2720] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2721] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2722 attached
[pid 2720] <... clone resumed>, parent_tid=[2722], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2722
[pid 2720] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[ 29.702148][ T2713] VFS: Busy inodes after unmount of ramfs. Self-destruct in 5 seconds. Have a nice day...
[pid 2720] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2722] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2721] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2722] <... set_robust_list resumed>) = 0
[pid 2721] <... futex resumed>) = 0
[pid 2722] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2721] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2722] <... umount2 resumed>) = 0
[pid 2722] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2720] <... futex resumed>) = 0
[pid 2720] exit_group(0) = ?
[pid 2721] <... futex resumed>) = ?
[pid 2721] +++ exited with 0 +++
[pid 2722] +++ exited with 0 +++
[pid 2720] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2720, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2723
./strace-static-x86_64: Process 2723 attached
[pid 2723] set_robust_list(0x5555560865e0, 24) = 0
[pid 2723] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2723] setpgid(0, 0) = 0
[pid 2723] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2723] write(3, "1000", 4) = 4
[pid 2723] close(3) = 0
[pid 2723] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2723] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2723] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2723] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2724 attached
, parent_tid=[2724], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2724
[pid 2724] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2724] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2723] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2724] <... futex resumed>) = 0
[pid 2724] mkdir("./file0", 000 <unfinished ...>
[pid 2723] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2724] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2724] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2724] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2723] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2723] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2724] <... futex resumed>) = 0
[pid 2724] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2724] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2724] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2723] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2723] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2724] <... futex resumed>) = 0
[pid 2723] <... futex resumed>) = 1
[pid 2724] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2723] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2724] <... mount resumed>) = 0
[pid 2724] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2723] <... futex resumed>) = 0
[pid 2723] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2723] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2723] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2724] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2723] <... mmap resumed>) = 0x7f236e446000
[pid 2723] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2723] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2724] <... umount2 resumed>) = 0
[pid 2723] <... clone resumed>, parent_tid=[2725], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2725
[pid 2723] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2723] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2724] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
./strace-static-x86_64: Process 2725 attached
[pid 2724] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2725] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2725] umount2("./file0", MNT_DETACH) = 0
[pid 2725] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2723] <... futex resumed>) = 0
[pid 2723] exit_group(0) = ?
[pid 2725] <... futex resumed>) = ?
[pid 2724] <... futex resumed>) = ?
[pid 2725] +++ exited with 0 +++
[pid 2724] +++ exited with 0 +++
[pid 2723] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2723, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2726
./strace-static-x86_64: Process 2726 attached
[pid 2726] set_robust_list(0x5555560865e0, 24) = 0
[pid 2726] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2726] setpgid(0, 0) = 0
[pid 2726] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2726] write(3, "1000", 4) = 4
[pid 2726] close(3) = 0
[pid 2726] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2726] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2726] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2726] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2727 attached
<unfinished ...>
[pid 2727] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2726] <... clone resumed>, parent_tid=[2727], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2727
[pid 2727] <... set_robust_list resumed>) = 0
[pid 2727] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2726] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2727] <... futex resumed>) = 0
[pid 2726] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2727] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2727] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2727] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2726] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2726] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2727] <... futex resumed>) = 0
[pid 2727] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2726] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2727] <... mount resumed>) = 0
[pid 2727] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2727] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2726] <... futex resumed>) = 0
[pid 2726] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2727] <... futex resumed>) = 0
[pid 2727] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2726] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2727] <... mount resumed>) = 0
[pid 2727] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2726] <... futex resumed>) = 0
[pid 2727] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2726] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2726] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2726] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2726] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2727] <... umount2 resumed>) = 0
[pid 2726] <... mprotect resumed>) = 0
[pid 2727] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2726] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2727] <... futex resumed>) = 0
[pid 2727] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2728 attached
<unfinished ...>
[pid 2726] <... clone resumed>, parent_tid=[2728], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2728
[pid 2726] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2726] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2728] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2728] umount2("./file0", MNT_DETACH) = 0
[pid 2728] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2726] <... futex resumed>) = 0
[pid 2728] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2726] exit_group(0) = ?
[pid 2727] <... futex resumed>) = ?
[pid 2727] +++ exited with 0 +++
[pid 2728] <... futex resumed>) = ?
[pid 2728] +++ exited with 0 +++
[pid 2726] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2726, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2729
./strace-static-x86_64: Process 2729 attached
[pid 2729] set_robust_list(0x5555560865e0, 24) = 0
[pid 2729] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2729] setpgid(0, 0) = 0
[pid 2729] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2729] write(3, "1000", 4) = 4
[pid 2729] close(3) = 0
[pid 2729] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2729] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2729] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2729] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2730 attached
, parent_tid=[2730], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2730
[pid 2730] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2729] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2730] <... set_robust_list resumed>) = 0
[pid 2729] <... futex resumed>) = 0
[pid 2729] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2730] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2730] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2729] <... futex resumed>) = 0
[pid 2730] <... futex resumed>) = 1
[pid 2729] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2730] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2729] <... futex resumed>) = 0
[pid 2729] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2730] <... mount resumed>) = 0
[pid 2730] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2729] <... futex resumed>) = 0
[pid 2729] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2729] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2730] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2730] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2729] <... futex resumed>) = 0
[pid 2729] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2729] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2729] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2729] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2729] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2731], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2731
[pid 2730] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2729] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2729] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2731 attached
<unfinished ...>
[pid 2731] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2730] <... umount2 resumed>) = 0
[pid 2731] <... set_robust_list resumed>) = 0
[pid 2731] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2730] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2731] <... umount2 resumed>) = 0
[pid 2731] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2729] <... futex resumed>) = 0
[pid 2730] <... futex resumed>) = 0
[pid 2729] exit_group(0) = ?
[pid 2731] <... futex resumed>) = ?
[pid 2731] +++ exited with 0 +++
[pid 2730] +++ exited with 0 +++
[pid 2729] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2729, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2732
./strace-static-x86_64: Process 2732 attached
[pid 2732] set_robust_list(0x5555560865e0, 24) = 0
[pid 2732] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2732] setpgid(0, 0) = 0
[pid 2732] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2732] write(3, "1000", 4) = 4
[pid 2732] close(3) = 0
[pid 2732] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2732] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2732] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2732] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2733 attached
, parent_tid=[2733], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2733
[pid 2733] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2732] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2733] <... set_robust_list resumed>) = 0
[pid 2732] <... futex resumed>) = 0
[pid 2732] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2733] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2733] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2732] <... futex resumed>) = 0
[pid 2733] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2732] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2733] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2732] <... futex resumed>) = 0
[pid 2733] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2732] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2733] <... mount resumed>) = 0
[pid 2733] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2732] <... futex resumed>) = 0
[pid 2733] <... futex resumed>) = 1
[pid 2732] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2733] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2732] <... futex resumed>) = 0
[pid 2732] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2733] <... mount resumed>) = 0
[pid 2733] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2732] <... futex resumed>) = 0
[pid 2733] <... futex resumed>) = 1
[pid 2732] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2733] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2732] <... futex resumed>) = 0
[pid 2732] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2732] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2732] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2732] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2733] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2734 attached
[pid 2733] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2732] <... clone resumed>, parent_tid=[2734], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2734
[pid 2734] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2733] <... futex resumed>) = 0
[pid 2734] <... set_robust_list resumed>) = 0
[pid 2732] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2733] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2734] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2732] <... futex resumed>) = 0
[pid 2732] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2734] <... umount2 resumed>) = 0
[pid 2734] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2732] <... futex resumed>) = 0
[pid 2734] <... futex resumed>) = 1
[pid 2732] exit_group(0 <unfinished ...>
[pid 2734] ????( <unfinished ...>
[pid 2732] <... exit_group resumed>) = ?
[pid 2734] <... ???? resumed>) = ?
[pid 2733] <... futex resumed>) = ?
[pid 2733] +++ exited with 0 +++
[pid 2734] +++ exited with 0 +++
[pid 2732] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2732, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2735
./strace-static-x86_64: Process 2735 attached
[pid 2735] set_robust_list(0x5555560865e0, 24) = 0
[pid 2735] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2735] setpgid(0, 0) = 0
[pid 2735] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2735] write(3, "1000", 4) = 4
[pid 2735] close(3) = 0
[pid 2735] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2735] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2735] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2735] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2736 attached
, parent_tid=[2736], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2736
[pid 2736] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2736] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2735] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2736] <... futex resumed>) = 0
[pid 2736] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2736] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2736] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2735] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2735] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2736] <... futex resumed>) = 0
[pid 2736] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2735] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2736] <... mount resumed>) = 0
[pid 2736] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2736] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2735] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2735] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2736] <... futex resumed>) = 0
[pid 2736] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2735] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2736] <... mount resumed>) = 0
[pid 2736] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2736] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2735] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2735] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2736] <... futex resumed>) = 0
[pid 2736] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2735] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2736] <... umount2 resumed>) = 0
[pid 2736] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2736] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2735] <... futex resumed>) = 0
[pid 2735] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2735] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2735] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2737 attached
, parent_tid=[2737], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2737
[pid 2737] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2737] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2735] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2737] <... futex resumed>) = 0
[pid 2737] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2735] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2737] <... umount2 resumed>) = 0
[pid 2737] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2737] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2735] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2735] exit_group(0 <unfinished ...>
[pid 2736] <... futex resumed>) = ?
[pid 2735] <... exit_group resumed>) = ?
[pid 2736] +++ exited with 0 +++
[pid 2737] <... futex resumed>) = ?
[pid 2737] +++ exited with 0 +++
[pid 2735] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2735, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2738
./strace-static-x86_64: Process 2738 attached
[pid 2738] set_robust_list(0x5555560865e0, 24) = 0
[pid 2738] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2738] setpgid(0, 0) = 0
[pid 2738] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2738] write(3, "1000", 4) = 4
[pid 2738] close(3) = 0
[pid 2738] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2738] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2738] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2738] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2739 attached
, parent_tid=[2739], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2739
[pid 2739] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2738] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2739] <... set_robust_list resumed>) = 0
[pid 2738] <... futex resumed>) = 0
[pid 2739] mkdir("./file0", 000 <unfinished ...>
[pid 2738] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2739] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2739] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2738] <... futex resumed>) = 0
[pid 2739] <... futex resumed>) = 1
[pid 2738] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2739] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2738] <... futex resumed>) = 0
[pid 2738] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2739] <... mount resumed>) = 0
[pid 2739] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2738] <... futex resumed>) = 0
[pid 2739] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2738] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2739] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2738] <... futex resumed>) = 0
[pid 2739] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2738] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2739] <... mount resumed>) = 0
[pid 2739] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2738] <... futex resumed>) = 0
[pid 2739] <... futex resumed>) = 1
[pid 2738] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2739] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2738] <... futex resumed>) = 0
[pid 2738] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2738] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2738] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2738] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2740 attached
<unfinished ...>
[pid 2739] <... umount2 resumed>) = 0
[pid 2738] <... clone resumed>, parent_tid=[2740], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2740
[pid 2740] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2739] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2738] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2740] <... set_robust_list resumed>) = 0
[pid 2739] <... futex resumed>) = 0
[pid 2738] <... futex resumed>) = 0
[pid 2740] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2738] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2739] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2740] <... umount2 resumed>) = 0
[pid 2740] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2738] <... futex resumed>) = 0
[pid 2740] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2738] exit_group(0) = ?
[pid 2739] <... futex resumed>) = ?
[pid 2740] <... futex resumed>) = ?
[pid 2740] +++ exited with 0 +++
[pid 2739] +++ exited with 0 +++
[pid 2738] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2738, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2741
./strace-static-x86_64: Process 2741 attached
[pid 2741] set_robust_list(0x5555560865e0, 24) = 0
[pid 2741] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2741] setpgid(0, 0) = 0
[pid 2741] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2741] write(3, "1000", 4) = 4
[pid 2741] close(3) = 0
[pid 2741] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2741] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2741] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2741] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2742 attached
, parent_tid=[2742], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2742
[pid 2741] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2742] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2741] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2742] <... set_robust_list resumed>) = 0
[pid 2742] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2742] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2741] <... futex resumed>) = 0
[pid 2741] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2741] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2742] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2742] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2741] <... futex resumed>) = 0
[pid 2741] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2741] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2742] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2742] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2741] <... futex resumed>) = 0
[pid 2741] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2741] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2741] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2741] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2741] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2742] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2741] <... clone resumed>, parent_tid=[2743], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2743
[pid 2741] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2741] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2743 attached
<unfinished ...>
[pid 2743] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2743] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2742] <... umount2 resumed>) = 0
[pid 2743] <... umount2 resumed>) = 0
[pid 2742] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2743] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2741] <... futex resumed>) = 0
[pid 2741] exit_group(0 <unfinished ...>
[pid 2742] <... futex resumed>) = 0
[pid 2741] <... exit_group resumed>) = ?
[pid 2743] <... futex resumed>) = ?
[pid 2743] +++ exited with 0 +++
[pid 2742] +++ exited with 0 +++
[pid 2741] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2741, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2744
./strace-static-x86_64: Process 2744 attached
[pid 2744] set_robust_list(0x5555560865e0, 24) = 0
[pid 2744] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2744] setpgid(0, 0) = 0
[pid 2744] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2744] write(3, "1000", 4) = 4
[pid 2744] close(3) = 0
[pid 2744] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2744] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2744] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2744] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2745 attached
, parent_tid=[2745], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2745
[pid 2745] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2744] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2745] <... set_robust_list resumed>) = 0
[pid 2744] <... futex resumed>) = 0
[pid 2744] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2745] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2745] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2744] <... futex resumed>) = 0
[pid 2745] <... futex resumed>) = 1
[pid 2744] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2745] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2744] <... futex resumed>) = 0
[pid 2744] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2745] <... mount resumed>) = 0
[pid 2745] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2744] <... futex resumed>) = 0
[pid 2745] <... futex resumed>) = 1
[pid 2744] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2745] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2744] <... futex resumed>) = 0
[pid 2744] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2745] <... mount resumed>) = 0
[pid 2745] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2744] <... futex resumed>) = 0
[pid 2744] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2744] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2744] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2744] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2744] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2746 attached
<unfinished ...>
[pid 2746] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2744] <... clone resumed>, parent_tid=[2746], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2746
[pid 2746] <... set_robust_list resumed>) = 0
[pid 2744] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2746] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2744] <... futex resumed>) = 0
[pid 2744] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2745] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2746] <... umount2 resumed>) = 0
[pid 2745] <... umount2 resumed>) = 0
[pid 2746] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2744] <... futex resumed>) = 0
[pid 2746] <... futex resumed>) = 1
[pid 2746] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2745] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2745] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2744] exit_group(0) = ?
[pid 2745] <... futex resumed>) = ?
[pid 2746] <... futex resumed>) = ?
[pid 2746] +++ exited with 0 +++
[pid 2745] +++ exited with 0 +++
[pid 2744] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2744, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2747
./strace-static-x86_64: Process 2747 attached
[pid 2747] set_robust_list(0x5555560865e0, 24) = 0
[pid 2747] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2747] setpgid(0, 0) = 0
[pid 2747] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2747] write(3, "1000", 4) = 4
[pid 2747] close(3) = 0
[pid 2747] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2747] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2747] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2747] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2748 attached
<unfinished ...>
[pid 2748] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2748] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2747] <... clone resumed>, parent_tid=[2748], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2748
[pid 2747] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2748] <... futex resumed>) = 0
[pid 2748] mkdir("./file0", 000 <unfinished ...>
[pid 2747] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2748] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2748] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2747] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2747] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2748] <... futex resumed>) = 0
[pid 2748] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2747] <... futex resumed>) = 0
[pid 2747] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2748] <... mount resumed>) = 0
[pid 2748] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2748] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2747] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2747] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2748] <... futex resumed>) = 0
[pid 2747] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2748] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2748] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2747] <... futex resumed>) = 0
[pid 2748] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2747] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2747] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2747] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2747] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2747] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2748] <... umount2 resumed>) = 0
[pid 2748] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2748] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2747] <... clone resumed>, parent_tid=[2749], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2749
./strace-static-x86_64: Process 2749 attached
[pid 2747] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2749] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2747] <... futex resumed>) = 0
[pid 2749] <... set_robust_list resumed>) = 0
[pid 2747] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2749] umount2("./file0", MNT_DETACH) = 0
[pid 2749] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2747] <... futex resumed>) = 0
[pid 2749] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2747] exit_group(0) = ?
[pid 2748] <... futex resumed>) = ?
[pid 2748] +++ exited with 0 +++
[pid 2749] <... futex resumed>) = ?
[pid 2749] +++ exited with 0 +++
[pid 2747] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2747, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2750
./strace-static-x86_64: Process 2750 attached
[pid 2750] set_robust_list(0x5555560865e0, 24) = 0
[pid 2750] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2750] setpgid(0, 0) = 0
[pid 2750] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2750] write(3, "1000", 4) = 4
[pid 2750] close(3) = 0
[pid 2750] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2750] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2750] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2750] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2751 attached
, parent_tid=[2751], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2751
[pid 2751] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2750] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2751] <... set_robust_list resumed>) = 0
[pid 2750] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2751] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2751] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2750] <... futex resumed>) = 0
[pid 2751] <... futex resumed>) = 1
[pid 2750] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2751] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2750] <... futex resumed>) = 0
[pid 2750] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2751] <... mount resumed>) = 0
[pid 2751] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2750] <... futex resumed>) = 0
[pid 2751] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2750] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2751] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2750] <... futex resumed>) = 0
[pid 2751] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2750] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2751] <... mount resumed>) = 0
[pid 2751] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2750] <... futex resumed>) = 0
[pid 2750] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2750] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2750] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2750] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2751] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2750] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2752], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2752
[pid 2750] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2751] <... umount2 resumed>) = 0
[pid 2750] <... futex resumed>) = 0
[pid 2750] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2752 attached
<unfinished ...>
[pid 2752] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2752] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2751] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2752] <... umount2 resumed>) = 0
[pid 2751] <... futex resumed>) = 0
[pid 2752] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2750] <... futex resumed>) = 0
[pid 2750] exit_group(0) = ?
[pid 2752] <... futex resumed>) = ?
[pid 2752] +++ exited with 0 +++
[pid 2751] +++ exited with 0 +++
[pid 2750] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2750, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2753 attached
, child_tidptr=0x5555560865d0) = 2753
[pid 2753] set_robust_list(0x5555560865e0, 24) = 0
[pid 2753] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2753] setpgid(0, 0) = 0
[pid 2753] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2753] write(3, "1000", 4) = 4
[pid 2753] close(3) = 0
[pid 2753] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2753] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2753] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2753] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2754], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2754
[pid 2753] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2753] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2754 attached
<unfinished ...>
[pid 2754] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2754] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2754] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2753] <... futex resumed>) = 0
[pid 2753] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2753] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2754] <... futex resumed>) = 1
[pid 2754] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2754] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2753] <... futex resumed>) = 0
[pid 2753] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2753] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2754] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2754] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2753] <... futex resumed>) = 0
[pid 2753] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2753] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2753] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2754] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2753] <... mmap resumed>) = 0x7f236e446000
[pid 2753] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2753] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2754] <... umount2 resumed>) = 0
[pid 2753] <... clone resumed>, parent_tid=[2755], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2755
[pid 2753] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2753] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2755 attached
<unfinished ...>
[pid 2754] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2755] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2754] <... futex resumed>) = 0
[pid 2754] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2755] <... set_robust_list resumed>) = 0
[pid 2755] umount2("./file0", MNT_DETACH) = 0
[pid 2755] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2753] <... futex resumed>) = 0
[pid 2755] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2753] exit_group(0) = ?
[pid 2754] <... futex resumed>) = ?
[pid 2755] <... futex resumed>) = ?
[pid 2754] +++ exited with 0 +++
[pid 2755] +++ exited with 0 +++
[pid 2753] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2753, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2756 attached
, child_tidptr=0x5555560865d0) = 2756
[pid 2756] set_robust_list(0x5555560865e0, 24) = 0
[pid 2756] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2756] setpgid(0, 0) = 0
[pid 2756] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2756] write(3, "1000", 4) = 4
[pid 2756] close(3) = 0
[pid 2756] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2756] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2756] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2756] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2757 attached
, parent_tid=[2757], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2757
[pid 2757] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2756] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2757] <... set_robust_list resumed>) = 0
[pid 2756] <... futex resumed>) = 0
[pid 2756] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2757] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2757] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2756] <... futex resumed>) = 0
[pid 2757] <... futex resumed>) = 1
[pid 2756] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2757] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2756] <... futex resumed>) = 0
[pid 2756] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2757] <... mount resumed>) = 0
[pid 2757] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2756] <... futex resumed>) = 0
[pid 2757] <... futex resumed>) = 1
[pid 2756] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2757] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2756] <... futex resumed>) = 0
[pid 2756] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2757] <... mount resumed>) = 0
[pid 2757] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2756] <... futex resumed>) = 0
[pid 2757] <... futex resumed>) = 1
[pid 2756] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2756] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2756] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2756] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2756] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2758 attached
, parent_tid=[2758], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2758
[pid 2758] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2756] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2758] <... set_robust_list resumed>) = 0
[pid 2756] <... futex resumed>) = 0
[pid 2758] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2756] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2758] <... umount2 resumed>) = 0
[pid 2757] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2758] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2756] <... futex resumed>) = 0
[pid 2758] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2757] <... umount2 resumed>) = 0
[pid 2757] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2757] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2756] exit_group(0) = ?
[pid 2758] <... futex resumed>) = ?
[pid 2757] <... futex resumed>) = ?
[pid 2758] +++ exited with 0 +++
[pid 2757] +++ exited with 0 +++
[pid 2756] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2756, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2759
./strace-static-x86_64: Process 2759 attached
[pid 2759] set_robust_list(0x5555560865e0, 24) = 0
[pid 2759] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2759] setpgid(0, 0) = 0
[pid 2759] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2759] write(3, "1000", 4) = 4
[pid 2759] close(3) = 0
[pid 2759] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2759] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2759] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2759] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2760 attached
<unfinished ...>
[pid 2760] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2760] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2759] <... clone resumed>, parent_tid=[2760], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2760
[pid 2759] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2760] <... futex resumed>) = 0
[pid 2760] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2759] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2760] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2760] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2759] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2759] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2760] <... futex resumed>) = 0
[pid 2759] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2760] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2760] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2759] <... futex resumed>) = 0
[pid 2760] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2759] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2759] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2760] <... mount resumed>) = 0
[pid 2760] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2759] <... futex resumed>) = 0
[pid 2760] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2759] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2759] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2759] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2759] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2759] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2760] <... umount2 resumed>) = 0
[pid 2760] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2759] <... clone resumed>, parent_tid=[2761], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2761
[pid 2760] <... futex resumed>) = 0
[pid 2759] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2759] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2760] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2761 attached
<unfinished ...>
[pid 2761] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2761] umount2("./file0", MNT_DETACH) = 0
[pid 2761] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2759] <... futex resumed>) = 0
[pid 2761] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2759] exit_group(0) = ?
[pid 2760] <... futex resumed>) = ?
[pid 2760] +++ exited with 0 +++
[pid 2761] <... futex resumed>) = ?
[pid 2761] +++ exited with 0 +++
[pid 2759] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2759, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2762
./strace-static-x86_64: Process 2762 attached
[pid 2762] set_robust_list(0x5555560865e0, 24) = 0
[pid 2762] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2762] setpgid(0, 0) = 0
[pid 2762] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2762] write(3, "1000", 4) = 4
[pid 2762] close(3) = 0
[pid 2762] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2762] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2762] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2762] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2763 attached
, parent_tid=[2763], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2763
[pid 2763] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2763] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2762] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2763] <... futex resumed>) = 0
[pid 2762] <... futex resumed>) = 1
[pid 2763] mkdir("./file0", 000 <unfinished ...>
[pid 2762] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2763] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2763] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2763] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2762] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2762] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2763] <... futex resumed>) = 0
[pid 2763] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2762] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2763] <... mount resumed>) = 0
[pid 2763] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2762] <... futex resumed>) = 0
[pid 2762] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2763] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2762] <... futex resumed>) = 0
[pid 2762] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2763] <... mount resumed>) = 0
[pid 2763] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2762] <... futex resumed>) = 0
[pid 2762] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2762] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2762] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2762] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2763] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2762] <... mprotect resumed>) = 0
[pid 2762] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2764], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2764
[pid 2763] <... umount2 resumed>) = 0
[pid 2762] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2762] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2764 attached
<unfinished ...>
[pid 2763] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2764] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2763] <... futex resumed>) = 0
[pid 2763] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2764] <... set_robust_list resumed>) = 0
[pid 2764] umount2("./file0", MNT_DETACH) = 0
[pid 2764] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2762] <... futex resumed>) = 0
[pid 2762] exit_group(0) = ?
[pid 2763] <... futex resumed>) = ?
[pid 2764] +++ exited with 0 +++
[pid 2763] +++ exited with 0 +++
[pid 2762] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2762, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2765 attached
<unfinished ...>
[pid 2765] set_robust_list(0x5555560865e0, 24) = 0
[pid 2765] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2765] setpgid(0, 0) = 0
[pid 2765] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC <unfinished ...>
[pid 371] <... clone resumed>, child_tidptr=0x5555560865d0) = 2765
[pid 2765] <... openat resumed>) = 3
[pid 2765] write(3, "1000", 4) = 4
[pid 2765] close(3) = 0
[pid 2765] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2765] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2765] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2765] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2766], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2766
[pid 2765] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2765] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2766 attached
<unfinished ...>
[pid 2766] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2766] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2766] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2765] <... futex resumed>) = 0
[pid 2766] <... futex resumed>) = 1
[pid 2765] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2766] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2765] <... futex resumed>) = 0
[pid 2765] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2766] <... mount resumed>) = 0
[pid 2766] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2765] <... futex resumed>) = 0
[pid 2766] <... futex resumed>) = 1
[pid 2765] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2766] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2765] <... futex resumed>) = 0
[pid 2765] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2766] <... mount resumed>) = 0
[pid 2766] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2765] <... futex resumed>) = 0
[pid 2766] <... futex resumed>) = 1
[pid 2765] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2766] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2765] <... futex resumed>) = 0
[pid 2765] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2765] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2765] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2765] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2766] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2767 attached
[pid 2766] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2765] <... clone resumed>, parent_tid=[2767], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2767
[pid 2765] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2766] <... futex resumed>) = 0
[pid 2767] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2765] <... futex resumed>) = 0
[pid 2766] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2767] <... set_robust_list resumed>) = 0
[pid 2765] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2767] umount2("./file0", MNT_DETACH) = 0
[pid 2767] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2765] <... futex resumed>) = 0
[pid 2767] <... futex resumed>) = 1
[pid 2767] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2765] exit_group(0) = ?
[pid 2766] <... futex resumed>) = 231
[pid 2767] <... futex resumed>) = ?
[pid 2766] +++ exited with 0 +++
[pid 2767] +++ exited with 0 +++
[pid 2765] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2765, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2768
./strace-static-x86_64: Process 2768 attached
[pid 2768] set_robust_list(0x5555560865e0, 24) = 0
[pid 2768] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2768] setpgid(0, 0) = 0
[pid 2768] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2768] write(3, "1000", 4) = 4
[pid 2768] close(3) = 0
[pid 2768] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2768] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2768] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2768] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2769], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2769
./strace-static-x86_64: Process 2769 attached
[pid 2769] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2769] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2768] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2769] <... futex resumed>) = 0
[pid 2769] mkdir("./file0", 000 <unfinished ...>
[pid 2768] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2769] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2769] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2769] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2768] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2768] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2769] <... futex resumed>) = 0
[pid 2768] <... futex resumed>) = 1
[pid 2769] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2768] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2769] <... mount resumed>) = 0
[pid 2769] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2769] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2768] <... futex resumed>) = 0
[pid 2768] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2769] <... futex resumed>) = 0
[pid 2769] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2768] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2769] <... mount resumed>) = 0
[pid 2769] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2769] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2768] <... futex resumed>) = 0
[pid 2768] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2769] <... futex resumed>) = 0
[pid 2769] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2768] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2769] <... umount2 resumed>) = 0
[pid 2768] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2769] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2769] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2768] <... mmap resumed>) = 0x7f236e446000
[pid 2768] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2768] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2770 attached
, parent_tid=[2770], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2770
[pid 2770] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2770] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2768] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2770] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2768] <... futex resumed>) = 0
[pid 2770] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2768] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2770] <... umount2 resumed>) = 0
[pid 2770] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2768] <... futex resumed>) = 0
[pid 2770] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2768] exit_group(0 <unfinished ...>
[pid 2769] <... futex resumed>) = ?
[pid 2768] <... exit_group resumed>) = ?
[pid 2769] +++ exited with 0 +++
[pid 2770] <... futex resumed>) = ?
[pid 2770] +++ exited with 0 +++
[pid 2768] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2768, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2771 attached
, child_tidptr=0x5555560865d0) = 2771
[pid 2771] set_robust_list(0x5555560865e0, 24) = 0
[pid 2771] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2771] setpgid(0, 0) = 0
[pid 2771] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2771] write(3, "1000", 4) = 4
[pid 2771] close(3) = 0
[pid 2771] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2771] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2771] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2771] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2772], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2772
[pid 2771] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2771] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2772 attached
<unfinished ...>
[pid 2772] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2772] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2772] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2771] <... futex resumed>) = 0
[pid 2771] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2771] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2772] <... futex resumed>) = 1
[pid 2772] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2772] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2771] <... futex resumed>) = 0
[pid 2771] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2771] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2772] <... futex resumed>) = 1
[pid 2772] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2772] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2771] <... futex resumed>) = 0
[pid 2771] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2771] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2771] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2771] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2772] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2771] <... mprotect resumed>) = 0
[pid 2771] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2773 attached
, parent_tid=[2773], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2773
[pid 2773] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2771] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2773] <... set_robust_list resumed>) = 0
[pid 2771] <... futex resumed>) = 0
[pid 2773] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2771] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2772] <... umount2 resumed>) = 0
[pid 2773] <... umount2 resumed>) = 0
[pid 2772] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2773] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2772] <... futex resumed>) = 0
[pid 2771] <... futex resumed>) = 0
[pid 2771] exit_group(0) = ?
[pid 2773] +++ exited with 0 +++
[pid 2772] +++ exited with 0 +++
[pid 2771] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2771, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2774
./strace-static-x86_64: Process 2774 attached
[pid 2774] set_robust_list(0x5555560865e0, 24) = 0
[pid 2774] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2774] setpgid(0, 0) = 0
[pid 2774] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2774] write(3, "1000", 4) = 4
[pid 2774] close(3) = 0
[pid 2774] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2774] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2774] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2774] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2775 attached
, parent_tid=[2775], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2775
[pid 2775] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2775] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2774] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2774] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2775] <... futex resumed>) = 0
[pid 2775] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2775] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2775] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2774] <... futex resumed>) = 0
[pid 2774] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2775] <... futex resumed>) = 0
[pid 2774] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2775] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2775] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2774] <... futex resumed>) = 0
[pid 2774] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2774] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2775] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2775] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2774] <... futex resumed>) = 0
[pid 2774] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2774] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2774] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2774] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2775] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2774] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2776], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2776
[pid 2775] <... umount2 resumed>) = 0
[pid 2774] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2774] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2776 attached
<unfinished ...>
[pid 2776] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2776] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2775] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2776] <... umount2 resumed>) = 0
[pid 2775] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2776] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2774] <... futex resumed>) = 0
[pid 2774] exit_group(0) = ?
[pid 2775] <... futex resumed>) = 231
[pid 2776] <... futex resumed>) = ?
[pid 2776] +++ exited with 0 +++
[pid 2775] +++ exited with 0 +++
[pid 2774] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2774, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2777
./strace-static-x86_64: Process 2777 attached
[pid 2777] set_robust_list(0x5555560865e0, 24) = 0
[pid 2777] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2777] setpgid(0, 0) = 0
[pid 2777] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2777] write(3, "1000", 4) = 4
[pid 2777] close(3) = 0
[pid 2777] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2777] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2777] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2777] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2778 attached
<unfinished ...>
[pid 2778] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2777] <... clone resumed>, parent_tid=[2778], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2778
[pid 2778] <... set_robust_list resumed>) = 0
[pid 2777] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2777] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2778] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2778] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2777] <... futex resumed>) = 0
[pid 2778] <... futex resumed>) = 1
[pid 2777] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2778] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2777] <... futex resumed>) = 0
[pid 2777] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2778] <... mount resumed>) = 0
[pid 2778] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2777] <... futex resumed>) = 0
[pid 2778] <... futex resumed>) = 1
[pid 2777] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2778] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2777] <... futex resumed>) = 0
[pid 2777] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2778] <... mount resumed>) = 0
[pid 2778] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2777] <... futex resumed>) = 0
[pid 2778] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2777] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2777] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2777] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2777] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2777] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2778] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2779 attached
[pid 2778] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2777] <... clone resumed>, parent_tid=[2779], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2779
[pid 2779] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2777] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2778] <... futex resumed>) = 0
[pid 2777] <... futex resumed>) = 0
[pid 2779] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2778] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2777] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2779] <... umount2 resumed>) = 0
[pid 2779] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2777] <... futex resumed>) = 0
[pid 2779] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2777] exit_group(0) = ?
[pid 2778] <... futex resumed>) = ?
[pid 2778] +++ exited with 0 +++
[pid 2779] <... futex resumed>) = ?
[pid 2779] +++ exited with 0 +++
[pid 2777] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2777, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2780
./strace-static-x86_64: Process 2780 attached
[pid 2780] set_robust_list(0x5555560865e0, 24) = 0
[pid 2780] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2780] setpgid(0, 0) = 0
[pid 2780] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2780] write(3, "1000", 4) = 4
[pid 2780] close(3) = 0
[pid 2780] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2780] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2780] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2780] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2781 attached
, parent_tid=[2781], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2781
[pid 2781] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2780] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2781] <... set_robust_list resumed>) = 0
[pid 2780] <... futex resumed>) = 0
[pid 2780] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2781] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2781] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2780] <... futex resumed>) = 0
[pid 2780] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2780] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2781] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2781] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2780] <... futex resumed>) = 0
[pid 2781] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2780] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2780] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2781] <... mount resumed>) = 0
[pid 2781] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2780] <... futex resumed>) = 0
[pid 2780] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2781] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2780] <... futex resumed>) = 0
[pid 2780] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2780] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2780] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2780] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2781] <... umount2 resumed>) = 0
[pid 2780] <... clone resumed>, parent_tid=[2782], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2782
./strace-static-x86_64: Process 2782 attached
[pid 2781] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2780] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2782] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2781] <... futex resumed>) = 0
[pid 2780] <... futex resumed>) = 0
[pid 2782] <... set_robust_list resumed>) = 0
[pid 2781] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2780] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2782] umount2("./file0", MNT_DETACH) = 0
[pid 2782] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2780] <... futex resumed>) = 0
[pid 2782] <... futex resumed>) = 1
[pid 2780] exit_group(0 <unfinished ...>
[pid 2782] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL) = ?
[pid 2780] <... exit_group resumed>) = ?
[pid 2781] <... futex resumed>) = ?
[pid 2781] +++ exited with 0 +++
[pid 2782] +++ exited with 0 +++
[pid 2780] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2780, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2783
./strace-static-x86_64: Process 2783 attached
[pid 2783] set_robust_list(0x5555560865e0, 24) = 0
[pid 2783] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2783] setpgid(0, 0) = 0
[pid 2783] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2783] write(3, "1000", 4) = 4
[pid 2783] close(3) = 0
[pid 2783] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2783] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2783] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2783] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2784], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2784
[pid 2783] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2783] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2784 attached
<unfinished ...>
[pid 2784] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2784] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2784] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2783] <... futex resumed>) = 0
[pid 2783] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2783] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2784] <... futex resumed>) = 1
[pid 2784] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2784] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2783] <... futex resumed>) = 0
[pid 2783] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2783] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2784] <... futex resumed>) = 1
[pid 2784] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2784] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2783] <... futex resumed>) = 0
[pid 2783] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2783] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2783] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2783] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2784] <... futex resumed>) = 1
[pid 2783] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2784] umount2("./file0", MNT_DETACH./strace-static-x86_64: Process 2785 attached
) = 0
[pid 2783] <... clone resumed>, parent_tid=[2785], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2785
[pid 2785] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2784] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2783] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2785] <... set_robust_list resumed>) = 0
[pid 2785] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2783] <... futex resumed>) = 0
[pid 2784] <... futex resumed>) = 0
[pid 2783] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2784] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2785] <... umount2 resumed>) = 0
[pid 2785] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2783] <... futex resumed>) = 0
[pid 2785] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2783] exit_group(0) = ?
[pid 2784] <... futex resumed>) = ?
[pid 2784] +++ exited with 0 +++
[pid 2785] <... futex resumed>) = ?
[pid 2785] +++ exited with 0 +++
[pid 2783] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2783, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2786
./strace-static-x86_64: Process 2786 attached
[pid 2786] set_robust_list(0x5555560865e0, 24) = 0
[pid 2786] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2786] setpgid(0, 0) = 0
[pid 2786] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2786] write(3, "1000", 4) = 4
[pid 2786] close(3) = 0
[pid 2786] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2786] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2786] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2786] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2787 attached
<unfinished ...>
[pid 2787] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2786] <... clone resumed>, parent_tid=[2787], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2787
[pid 2787] <... set_robust_list resumed>) = 0
[pid 2787] mkdir("./file0", 000 <unfinished ...>
[pid 2786] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2787] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2786] <... futex resumed>) = 0
[pid 2787] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2786] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2787] <... futex resumed>) = 0
[pid 2786] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2787] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2786] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2787] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2786] <... futex resumed>) = 0
[pid 2787] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2786] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2787] <... mount resumed>) = 0
[pid 2787] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2786] <... futex resumed>) = 0
[pid 2787] <... futex resumed>) = 1
[pid 2786] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2787] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2786] <... futex resumed>) = 0
[pid 2786] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2787] <... mount resumed>) = 0
[pid 2787] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2786] <... futex resumed>) = 0
[pid 2787] <... futex resumed>) = 1
[pid 2786] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2787] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2786] <... futex resumed>) = 0
[pid 2786] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2786] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2786] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2786] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2787] <... umount2 resumed>) = 0
[pid 2787] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2788 attached
) = 0
[pid 2786] <... clone resumed>, parent_tid=[2788], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2788
[pid 2788] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2787] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2786] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2788] <... set_robust_list resumed>) = 0
[pid 2786] <... futex resumed>) = 0
[pid 2788] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2786] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2788] <... umount2 resumed>) = 0
[pid 2788] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2786] <... futex resumed>) = 0
[pid 2788] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2786] exit_group(0) = ?
[pid 2787] <... futex resumed>) = 231
[pid 2788] <... futex resumed>) = ?
[pid 2787] +++ exited with 0 +++
[pid 2788] +++ exited with 0 +++
[pid 2786] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2786, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2789
./strace-static-x86_64: Process 2789 attached
[pid 2789] set_robust_list(0x5555560865e0, 24) = 0
[pid 2789] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2789] setpgid(0, 0) = 0
[pid 2789] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2789] write(3, "1000", 4) = 4
[pid 2789] close(3) = 0
[pid 2789] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2789] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2789] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2789] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2790 attached
, parent_tid=[2790], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2790
[pid 2790] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2790] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2789] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2789] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2790] <... futex resumed>) = 0
[pid 2790] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2790] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2789] <... futex resumed>) = 0
[pid 2790] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2789] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2790] <... futex resumed>) = 0
[pid 2790] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2789] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2790] <... mount resumed>) = 0
[pid 2790] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2790] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2789] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2789] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2790] <... futex resumed>) = 0
[pid 2790] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2789] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2790] <... mount resumed>) = 0
[pid 2790] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2790] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2789] <... futex resumed>) = 0
[pid 2789] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2789] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2790] <... futex resumed>) = 0
[pid 2789] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2790] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2789] <... mmap resumed>) = 0x7f236e446000
[pid 2789] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2789] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2790] <... umount2 resumed>) = 0
[pid 2790] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2790] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2791 attached
<unfinished ...>
[pid 2791] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2791] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2789] <... clone resumed>, parent_tid=[2791], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2791
[pid 2789] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2791] <... futex resumed>) = 0
[pid 2789] <... futex resumed>) = 1
[pid 2791] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2789] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2791] <... umount2 resumed>) = 0
[pid 2791] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2789] <... futex resumed>) = 0
[pid 2791] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2789] exit_group(0) = ?
[pid 2790] <... futex resumed>) = ?
[pid 2790] +++ exited with 0 +++
[pid 2791] <... futex resumed>) = ?
[pid 2791] +++ exited with 0 +++
[pid 2789] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2789, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2792
./strace-static-x86_64: Process 2792 attached
[pid 2792] set_robust_list(0x5555560865e0, 24) = 0
[pid 2792] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2792] setpgid(0, 0) = 0
[pid 2792] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2792] write(3, "1000", 4) = 4
[pid 2792] close(3) = 0
[pid 2792] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2792] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2792] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2792] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2793 attached
<unfinished ...>
[pid 2793] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2793] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2792] <... clone resumed>, parent_tid=[2793], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2793
[pid 2792] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2793] <... futex resumed>) = 0
[pid 2793] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2793] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2793] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2792] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2792] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2793] <... futex resumed>) = 0
[pid 2793] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2792] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2793] <... mount resumed>) = 0
[pid 2793] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2793] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2792] <... futex resumed>) = 0
[pid 2793] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2792] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2792] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2793] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2793] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2793] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2792] <... futex resumed>) = 0
[pid 2792] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2792] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2792] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2793] <... futex resumed>) = 0
[pid 2793] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2792] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2792] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2793] <... umount2 resumed>) = 0
[pid 2792] <... clone resumed>, parent_tid=[2794], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2794
[pid 2792] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2792] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2793] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2794 attached
<unfinished ...>
[pid 2794] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2794] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2793] <... futex resumed>) = 0
[pid 2793] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2794] <... umount2 resumed>) = 0
[pid 2794] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2792] <... futex resumed>) = 0
[pid 2792] exit_group(0 <unfinished ...>
[pid 2793] <... futex resumed>) = ?
[pid 2792] <... exit_group resumed>) = ?
[pid 2793] +++ exited with 0 +++
[pid 2794] <... futex resumed>) = ?
[pid 2794] +++ exited with 0 +++
[pid 2792] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2792, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2795
./strace-static-x86_64: Process 2795 attached
[pid 2795] set_robust_list(0x5555560865e0, 24) = 0
[pid 2795] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2795] setpgid(0, 0) = 0
[pid 2795] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2795] write(3, "1000", 4) = 4
[pid 2795] close(3) = 0
[pid 2795] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2795] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2795] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2795] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2796 attached
, parent_tid=[2796], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2796
[pid 2796] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2796] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2795] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2796] <... futex resumed>) = 0
[pid 2795] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2796] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2796] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2796] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2795] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2795] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2796] <... futex resumed>) = 0
[pid 2796] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2795] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2796] <... mount resumed>) = 0
[pid 2796] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2795] <... futex resumed>) = 0
[pid 2795] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2795] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2796] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2796] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2795] <... futex resumed>) = 0
[pid 2795] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2795] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2796] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2795] <... futex resumed>) = 0
[pid 2795] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2795] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2796] <... umount2 resumed>) = 0
[pid 2795] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2797], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2797
[pid 2796] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2795] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2795] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2797 attached
<unfinished ...>
[pid 2797] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2797] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2796] <... futex resumed>) = 0
[pid 2796] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2797] <... umount2 resumed>) = 0
[pid 2797] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2795] <... futex resumed>) = 0
[pid 2795] exit_group(0) = ?
[pid 2796] <... futex resumed>) = ?
[pid 2797] <... futex resumed>) = ?
[pid 2796] +++ exited with 0 +++
[pid 2797] +++ exited with 0 +++
[pid 2795] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2795, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2798
./strace-static-x86_64: Process 2798 attached
[pid 2798] set_robust_list(0x5555560865e0, 24) = 0
[pid 2798] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2798] setpgid(0, 0) = 0
[pid 2798] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2798] write(3, "1000", 4) = 4
[pid 2798] close(3) = 0
[pid 2798] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2798] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2798] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2798] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2799 attached
, parent_tid=[2799], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2799
[pid 2799] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2798] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2799] <... set_robust_list resumed>) = 0
[pid 2798] <... futex resumed>) = 0
[pid 2798] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2799] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2799] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2798] <... futex resumed>) = 0
[pid 2799] <... futex resumed>) = 1
[pid 2798] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2799] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2798] <... futex resumed>) = 0
[pid 2798] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2799] <... mount resumed>) = 0
[pid 2799] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2798] <... futex resumed>) = 0
[pid 2798] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2798] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2799] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2799] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2798] <... futex resumed>) = 0
[pid 2798] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2798] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2798] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2798] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2798] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2799] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2798] <... clone resumed>, parent_tid=[2800], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2800
[pid 2798] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2798] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2800 attached
<unfinished ...>
[pid 2799] <... umount2 resumed>) = 0
[pid 2800] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2800] umount2("./file0", MNT_DETACH) = 0
[pid 2799] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2800] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2798] <... futex resumed>) = 0
[pid 2798] exit_group(0) = ?
[pid 2800] <... futex resumed>) = ?
[pid 2800] +++ exited with 0 +++
[pid 2799] <... futex resumed>) = ?
[pid 2799] +++ exited with 0 +++
[pid 2798] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2798, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2801
./strace-static-x86_64: Process 2801 attached
[pid 2801] set_robust_list(0x5555560865e0, 24) = 0
[pid 2801] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2801] setpgid(0, 0) = 0
[pid 2801] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2801] write(3, "1000", 4) = 4
[pid 2801] close(3) = 0
[pid 2801] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2801] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2801] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2801] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2802 attached
, parent_tid=[2802], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2802
[pid 2802] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2801] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2802] mkdir("./file0", 000 <unfinished ...>
[pid 2801] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2802] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2802] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2801] <... futex resumed>) = 0
[pid 2801] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2801] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2802] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2802] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2801] <... futex resumed>) = 0
[pid 2801] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2801] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2802] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2802] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2801] <... futex resumed>) = 0
[pid 2801] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2801] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2801] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2801] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2801] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2803], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2803
./strace-static-x86_64: Process 2803 attached
[pid 2801] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2803] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2801] <... futex resumed>) = 0
[pid 2803] <... set_robust_list resumed>) = 0
[pid 2801] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2803] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2802] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2803] <... umount2 resumed>) = 0
[pid 2803] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2802] <... umount2 resumed>) = 0
[pid 2802] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2801] <... futex resumed>) = 0
[pid 2801] exit_group(0 <unfinished ...>
[pid 2802] <... futex resumed>) = 0
[pid 2801] <... exit_group resumed>) = ?
[pid 2803] <... futex resumed>) = ?
[pid 2803] +++ exited with 0 +++
[pid 2802] +++ exited with 0 +++
[pid 2801] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2801, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2804
./strace-static-x86_64: Process 2804 attached
[pid 2804] set_robust_list(0x5555560865e0, 24) = 0
[pid 2804] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2804] setpgid(0, 0) = 0
[pid 2804] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2804] write(3, "1000", 4) = 4
[pid 2804] close(3) = 0
[pid 2804] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2804] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2804] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2804] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2805], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2805
./strace-static-x86_64: Process 2805 attached
[pid 2805] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2805] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2804] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2805] <... futex resumed>) = 0
[pid 2804] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2805] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2805] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2805] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2804] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2804] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2805] <... futex resumed>) = 0
[pid 2805] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2804] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2805] <... mount resumed>) = 0
[pid 2805] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2804] <... futex resumed>) = 0
[pid 2804] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2804] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2805] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2805] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2804] <... futex resumed>) = 0
[pid 2804] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2804] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2804] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2804] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2804] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2805] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2804] <... clone resumed>, parent_tid=[2806], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2806
[pid 2804] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2804] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2806 attached
<unfinished ...>
[pid 2806] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2806] umount2("./file0", MNT_DETACH) = 0
[pid 2805] <... umount2 resumed>) = 0
[pid 2806] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2804] <... futex resumed>) = 0
[pid 2806] <... futex resumed>) = 1
[pid 2805] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2806] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2805] <... futex resumed>) = 0
[pid 2805] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2804] exit_group(0) = ?
[pid 2806] <... futex resumed>) = ?
[pid 2806] +++ exited with 0 +++
[pid 2805] <... futex resumed>) = ?
[pid 2805] +++ exited with 0 +++
[pid 2804] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2804, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2807
./strace-static-x86_64: Process 2807 attached
[pid 2807] set_robust_list(0x5555560865e0, 24) = 0
[pid 2807] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2807] setpgid(0, 0) = 0
[pid 2807] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2807] write(3, "1000", 4) = 4
[pid 2807] close(3) = 0
[pid 2807] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2807] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2807] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2807] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2808 attached
<unfinished ...>
[pid 2808] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2808] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2807] <... clone resumed>, parent_tid=[2808], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2808
[pid 2807] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2808] <... futex resumed>) = 0
[pid 2808] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2808] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2808] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2807] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2807] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2808] <... futex resumed>) = 0
[pid 2807] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2808] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2808] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2807] <... futex resumed>) = 0
[pid 2808] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2807] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2808] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2807] <... futex resumed>) = 0
[pid 2808] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2807] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2808] <... mount resumed>) = 0
[pid 2808] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2807] <... futex resumed>) = 0
[pid 2808] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2807] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2807] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2807] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2807] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2807] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2808] <... umount2 resumed>) = 0
[pid 2807] <... clone resumed>, parent_tid=[2809], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2809
[pid 2808] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2807] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2808] <... futex resumed>) = 0
[pid 2807] <... futex resumed>) = 0
[pid 2808] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2807] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2809 attached
<unfinished ...>
[pid 2809] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2809] umount2("./file0", MNT_DETACH) = 0
[pid 2809] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2807] <... futex resumed>) = 0
[pid 2809] <... futex resumed>) = 1
[pid 2809] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2807] exit_group(0) = ?
[pid 2808] <... futex resumed>) = ?
[pid 2808] +++ exited with 0 +++
[pid 2809] <... futex resumed>) = ?
[pid 2809] +++ exited with 0 +++
[pid 2807] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2807, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2810
./strace-static-x86_64: Process 2810 attached
[pid 2810] set_robust_list(0x5555560865e0, 24) = 0
[pid 2810] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2810] setpgid(0, 0) = 0
[pid 2810] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2810] write(3, "1000", 4) = 4
[pid 2810] close(3) = 0
[pid 2810] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2810] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2810] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2810] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2811 attached
<unfinished ...>
[pid 2811] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2810] <... clone resumed>, parent_tid=[2811], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2811
[pid 2810] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2810] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2811] <... set_robust_list resumed>) = 0
[pid 2811] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2811] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2810] <... futex resumed>) = 0
[pid 2811] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2810] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2810] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2811] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2811] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2811] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2810] <... futex resumed>) = 0
[pid 2810] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2810] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2811] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2811] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2810] <... futex resumed>) = 0
[pid 2811] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2810] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2810] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2810] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2810] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2810] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2811] <... umount2 resumed>) = 0
[pid 2810] <... clone resumed>, parent_tid=[2812], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2812
[pid 2810] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2811] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2812 attached
<unfinished ...>
[pid 2810] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2812] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2811] <... futex resumed>) = 0
[pid 2812] <... set_robust_list resumed>) = 0
[pid 2811] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2812] umount2("./file0", MNT_DETACH) = 0
[pid 2812] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2810] <... futex resumed>) = 0
[pid 2810] exit_group(0) = ?
[pid 2811] <... futex resumed>) = ?
[pid 2811] +++ exited with 0 +++
[pid 2812] +++ exited with 0 +++
[pid 2810] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2810, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2813
./strace-static-x86_64: Process 2813 attached
[pid 2813] set_robust_list(0x5555560865e0, 24) = 0
[pid 2813] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2813] setpgid(0, 0) = 0
[pid 2813] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2813] write(3, "1000", 4) = 4
[pid 2813] close(3) = 0
[pid 2813] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2813] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2813] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2813] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2814], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2814
[pid 2813] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2813] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2814 attached
<unfinished ...>
[pid 2814] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2814] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2814] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2813] <... futex resumed>) = 0
[pid 2813] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2813] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2814] <... futex resumed>) = 1
[pid 2814] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2814] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2813] <... futex resumed>) = 0
[pid 2813] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2813] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2814] <... futex resumed>) = 1
[pid 2814] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2814] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2813] <... futex resumed>) = 0
[pid 2813] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2813] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2813] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2813] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2813] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2815 attached
<unfinished ...>
[pid 2815] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2813] <... clone resumed>, parent_tid=[2815], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2815
[pid 2813] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2813] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2814] <... futex resumed>) = 1
[pid 2814] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2815] <... set_robust_list resumed>) = 0
[pid 2815] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2814] <... umount2 resumed>) = 0
[pid 2814] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2814] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2815] <... umount2 resumed>) = 0
[pid 2815] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2813] <... futex resumed>) = 0
[pid 2813] exit_group(0) = ?
[pid 2814] <... futex resumed>) = ?
[pid 2815] +++ exited with 0 +++
[pid 2814] +++ exited with 0 +++
[pid 2813] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2813, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2816 attached
, child_tidptr=0x5555560865d0) = 2816
[pid 2816] set_robust_list(0x5555560865e0, 24) = 0
[pid 2816] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2816] setpgid(0, 0) = 0
[pid 2816] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2816] write(3, "1000", 4) = 4
[pid 2816] close(3) = 0
[pid 2816] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2816] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2816] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2816] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2817 attached
<unfinished ...>
[pid 2817] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2817] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2816] <... clone resumed>, parent_tid=[2817], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2817
[pid 2816] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2817] <... futex resumed>) = 0
[pid 2817] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2817] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2817] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2816] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2816] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2817] <... futex resumed>) = 0
[pid 2817] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2816] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2817] <... mount resumed>) = 0
[pid 2817] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2817] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2816] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2816] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2817] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2816] <... futex resumed>) = 0
[pid 2817] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2816] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2817] <... mount resumed>) = 0
[pid 2817] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2817] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2816] <... futex resumed>) = 0
[pid 2816] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2817] <... futex resumed>) = 0
[pid 2816] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2817] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2816] <... futex resumed>) = 0
[pid 2816] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2817] <... umount2 resumed>) = 0
[pid 2816] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2817] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2817] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2816] <... mprotect resumed>) = 0
[pid 2816] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2818 attached
<unfinished ...>
[pid 2818] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2818] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2816] <... clone resumed>, parent_tid=[2818], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2818
[pid 2816] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2818] <... futex resumed>) = 0
[pid 2818] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2816] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2818] <... umount2 resumed>) = 0
[pid 2818] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2818] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2816] <... futex resumed>) = 0
[pid 2816] exit_group(0) = ?
[pid 2817] <... futex resumed>) = ?
[pid 2817] +++ exited with 0 +++
[pid 2818] <... futex resumed>) = ?
[pid 2818] +++ exited with 0 +++
[pid 2816] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2816, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2819
./strace-static-x86_64: Process 2819 attached
[pid 2819] set_robust_list(0x5555560865e0, 24) = 0
[pid 2819] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2819] setpgid(0, 0) = 0
[pid 2819] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2819] write(3, "1000", 4) = 4
[pid 2819] close(3) = 0
[pid 2819] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2819] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2819] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2819] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2820], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2820
[pid 2819] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2819] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2820 attached
<unfinished ...>
[pid 2820] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2820] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2820] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2819] <... futex resumed>) = 0
[pid 2819] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2819] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2820] <... futex resumed>) = 1
[pid 2820] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2820] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2819] <... futex resumed>) = 0
[pid 2819] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2819] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2820] <... futex resumed>) = 1
[pid 2820] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2820] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2819] <... futex resumed>) = 0
[pid 2819] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2819] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2819] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2819] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2819] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2821], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2821
[pid 2819] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2819] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2821 attached
<unfinished ...>
[pid 2820] <... futex resumed>) = 1
[pid 2820] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2821] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2820] <... umount2 resumed>) = 0
[pid 2820] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2820] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2821] <... set_robust_list resumed>) = 0
[pid 2821] umount2("./file0", MNT_DETACH) = 0
[pid 2821] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2819] <... futex resumed>) = 0
[pid 2819] exit_group(0 <unfinished ...>
[pid 2821] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2819] <... exit_group resumed>) = ?
[pid 2820] <... futex resumed>) = ?
[pid 2820] +++ exited with 0 +++
[pid 2821] <... futex resumed>) = ?
[pid 2821] +++ exited with 0 +++
[pid 2819] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2819, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2822
./strace-static-x86_64: Process 2822 attached
[pid 2822] set_robust_list(0x5555560865e0, 24) = 0
[pid 2822] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2822] setpgid(0, 0) = 0
[pid 2822] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2822] write(3, "1000", 4) = 4
[pid 2822] close(3) = 0
[pid 2822] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2822] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2822] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2822] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2823 attached
, parent_tid=[2823], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2823
[pid 2823] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2823] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2822] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2823] <... futex resumed>) = 0
[pid 2823] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2823] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2823] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2822] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2822] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2823] <... futex resumed>) = 0
[pid 2823] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2822] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2823] <... mount resumed>) = 0
[pid 2823] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2823] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2822] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2822] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2823] <... futex resumed>) = 0
[pid 2822] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2823] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2823] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2823] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2822] <... futex resumed>) = 0
[pid 2822] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2823] <... futex resumed>) = 0
[pid 2822] <... futex resumed>) = 1
[pid 2823] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2822] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2823] <... umount2 resumed>) = 0
[pid 2823] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2823] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2822] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2822] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2822] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2824 attached
, parent_tid=[2824], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2824
[pid 2824] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2824] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2822] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2824] <... futex resumed>) = 0
[pid 2822] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2824] umount2("./file0", MNT_DETACH) = 0
[pid 2824] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2824] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2822] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2822] exit_group(0 <unfinished ...>
[pid 2823] <... futex resumed>) = ?
[pid 2822] <... exit_group resumed>) = ?
[pid 2823] +++ exited with 0 +++
[pid 2824] <... futex resumed>) = ?
[pid 2824] +++ exited with 0 +++
[pid 2822] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2822, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2825
./strace-static-x86_64: Process 2825 attached
[pid 2825] set_robust_list(0x5555560865e0, 24) = 0
[pid 2825] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2825] setpgid(0, 0) = 0
[pid 2825] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2825] write(3, "1000", 4) = 4
[pid 2825] close(3) = 0
[pid 2825] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2825] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2825] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2825] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2826 attached
, parent_tid=[2826], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2826
[pid 2826] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2825] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2826] <... set_robust_list resumed>) = 0
[pid 2825] <... futex resumed>) = 0
[pid 2825] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2826] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2826] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2825] <... futex resumed>) = 0
[pid 2826] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2825] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2826] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2825] <... futex resumed>) = 0
[pid 2826] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2825] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2826] <... mount resumed>) = 0
[pid 2826] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2825] <... futex resumed>) = 0
[pid 2826] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2825] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2826] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2825] <... futex resumed>) = 0
[pid 2826] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2825] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2826] <... mount resumed>) = 0
[pid 2826] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2825] <... futex resumed>) = 0
[pid 2826] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2825] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2826] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2825] <... futex resumed>) = 0
[pid 2826] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2825] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2825] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2825] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2825] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2827 attached
<unfinished ...>
[pid 2826] <... umount2 resumed>) = 0
[pid 2825] <... clone resumed>, parent_tid=[2827], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2827
[pid 2827] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2826] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2825] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2827] <... set_robust_list resumed>) = 0
[pid 2826] <... futex resumed>) = 0
[pid 2825] <... futex resumed>) = 0
[pid 2827] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2826] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2825] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2827] <... umount2 resumed>) = 0
[pid 2827] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2825] <... futex resumed>) = 0
[pid 2827] <... futex resumed>) = 1
[pid 2825] exit_group(0 <unfinished ...>
[pid 2827] ????( <unfinished ...>
[pid 2825] <... exit_group resumed>) = ?
[pid 2827] <... ???? resumed>) = ?
[pid 2826] <... futex resumed>) = ?
[pid 2826] +++ exited with 0 +++
[pid 2827] +++ exited with 0 +++
[pid 2825] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2825, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2828 attached
, child_tidptr=0x5555560865d0) = 2828
[pid 2828] set_robust_list(0x5555560865e0, 24) = 0
[pid 2828] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2828] setpgid(0, 0) = 0
[pid 2828] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2828] write(3, "1000", 4) = 4
[pid 2828] close(3) = 0
[pid 2828] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2828] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2828] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2828] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2829 attached
, parent_tid=[2829], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2829
[pid 2829] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2828] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2828] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2829] <... set_robust_list resumed>) = 0
[pid 2829] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2829] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2829] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2828] <... futex resumed>) = 0
[pid 2828] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2828] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2829] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2829] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2829] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2829] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2828] <... futex resumed>) = 0
[pid 2828] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2828] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2829] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2829] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2829] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2828] <... futex resumed>) = 0
[pid 2829] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2828] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2828] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2828] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2828] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2828] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2829] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2828] <... clone resumed>, parent_tid=[2830], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2830
[pid 2829] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2828] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2828] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2830 attached
<unfinished ...>
[pid 2830] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2830] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2829] <... umount2 resumed>) = 0
[pid 2829] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2830] <... umount2 resumed>) = 0
[pid 2829] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2830] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2828] <... futex resumed>) = 0
[pid 2828] exit_group(0) = ?
[pid 2829] <... futex resumed>) = ?
[pid 2830] <... futex resumed>) = ?
[pid 2830] +++ exited with 0 +++
[pid 2829] +++ exited with 0 +++
[pid 2828] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2828, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2831
./strace-static-x86_64: Process 2831 attached
[pid 2831] set_robust_list(0x5555560865e0, 24) = 0
[pid 2831] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2831] setpgid(0, 0) = 0
[pid 2831] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2831] write(3, "1000", 4) = 4
[pid 2831] close(3) = 0
[pid 2831] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2831] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2831] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2831] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2832 attached
, parent_tid=[2832], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2832
[pid 2832] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2832] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2831] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2832] <... futex resumed>) = 0
[pid 2832] mkdir("./file0", 000 <unfinished ...>
[pid 2831] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2832] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2832] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2832] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2831] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2831] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2832] <... futex resumed>) = 0
[pid 2831] <... futex resumed>) = 1
[pid 2832] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2831] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2832] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2832] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2831] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2831] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2832] <... futex resumed>) = 0
[pid 2831] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2832] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2832] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2832] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2831] <... futex resumed>) = 0
[pid 2831] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2832] <... futex resumed>) = 0
[pid 2831] <... futex resumed>) = 1
[pid 2832] umount2("./file0", MNT_DETACH) = 0
[pid 2831] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2832] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2832] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2831] <... futex resumed>) = 0
[pid 2831] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2831] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2831] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2833 attached
, parent_tid=[2833], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2833
[pid 2833] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2831] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2833] <... set_robust_list resumed>) = 0
[pid 2831] <... futex resumed>) = 0
[pid 2833] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2831] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2833] <... umount2 resumed>) = 0
[pid 2833] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2831] <... futex resumed>) = 0
[pid 2833] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2831] exit_group(0) = ?
[pid 2832] <... futex resumed>) = ?
[pid 2832] +++ exited with 0 +++
[pid 2833] <... futex resumed>) = ?
[pid 2833] +++ exited with 0 +++
[pid 2831] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2831, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2834
./strace-static-x86_64: Process 2834 attached
[pid 2834] set_robust_list(0x5555560865e0, 24) = 0
[pid 2834] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2834] setpgid(0, 0) = 0
[pid 2834] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2834] write(3, "1000", 4) = 4
[pid 2834] close(3) = 0
[pid 2834] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2834] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2834] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2834] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2835 attached
<unfinished ...>
[pid 2835] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2835] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2834] <... clone resumed>, parent_tid=[2835], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2835
[pid 2834] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2835] <... futex resumed>) = 0
[pid 2835] mkdir("./file0", 000 <unfinished ...>
[pid 2834] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2835] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2835] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2835] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2834] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2834] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2835] <... futex resumed>) = 0
[pid 2835] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2834] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2835] <... mount resumed>) = 0
[pid 2835] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2834] <... futex resumed>) = 0
[pid 2835] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2834] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2834] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2835] <... mount resumed>) = 0
[pid 2835] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2834] <... futex resumed>) = 0
[pid 2835] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2834] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2835] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2834] <... futex resumed>) = 0
[pid 2834] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2834] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2834] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2835] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2834] <... mprotect resumed>) = 0
[pid 2834] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2835] <... umount2 resumed>) = 0
[pid 2835] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2836 attached
) = 0
[pid 2834] <... clone resumed>, parent_tid=[2836], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2836
[pid 2834] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2834] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2836] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2835] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2836] <... set_robust_list resumed>) = 0
[pid 2836] umount2("./file0", MNT_DETACH) = 0
[pid 2836] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2834] <... futex resumed>) = 0
[pid 2834] exit_group(0 <unfinished ...>
[pid 2835] <... futex resumed>) = ?
[pid 2835] +++ exited with 0 +++
[pid 2836] +++ exited with 0 +++
[pid 2834] <... exit_group resumed>) = ?
[pid 2834] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2834, si_uid=0, si_status=0, si_utime=0, si_stime=1} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2837
./strace-static-x86_64: Process 2837 attached
[pid 2837] set_robust_list(0x5555560865e0, 24) = 0
[pid 2837] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2837] setpgid(0, 0) = 0
[pid 2837] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2837] write(3, "1000", 4) = 4
[pid 2837] close(3) = 0
[pid 2837] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2837] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2837] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2837] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2838 attached
, parent_tid=[2838], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2838
[pid 2838] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2838] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2837] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2838] <... futex resumed>) = 0
[pid 2838] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2838] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2838] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2837] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2837] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2838] <... futex resumed>) = 0
[pid 2838] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2837] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2838] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2838] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2837] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2837] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2838] <... futex resumed>) = 0
[pid 2838] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2837] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2838] <... mount resumed>) = 0
[pid 2838] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2837] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2838] <... futex resumed>) = 0
[pid 2838] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2837] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2838] <... futex resumed>) = 0
[pid 2838] umount2("./file0", MNT_DETACH) = 0
[pid 2837] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2838] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2838] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2837] <... futex resumed>) = 0
[pid 2837] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2837] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2837] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2839 attached
<unfinished ...>
[pid 2839] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2839] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2837] <... clone resumed>, parent_tid=[2839], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2839
[pid 2837] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2839] <... futex resumed>) = 0
[pid 2839] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2837] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2839] <... umount2 resumed>) = 0
[pid 2839] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2837] <... futex resumed>) = 0
[pid 2839] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2837] exit_group(0 <unfinished ...>
[pid 2838] <... futex resumed>) = ?
[pid 2837] <... exit_group resumed>) = ?
[pid 2838] +++ exited with 0 +++
[pid 2839] <... futex resumed>) = ?
[pid 2839] +++ exited with 0 +++
[pid 2837] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2837, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2840
./strace-static-x86_64: Process 2840 attached
[pid 2840] set_robust_list(0x5555560865e0, 24) = 0
[pid 2840] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2840] setpgid(0, 0) = 0
[pid 2840] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2840] write(3, "1000", 4) = 4
[pid 2840] close(3) = 0
[pid 2840] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2840] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2840] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2840] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2841 attached
, parent_tid=[2841], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2841
[pid 2841] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2840] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2841] <... set_robust_list resumed>) = 0
[pid 2840] <... futex resumed>) = 0
[pid 2840] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2841] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2841] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2840] <... futex resumed>) = 0
[pid 2841] <... futex resumed>) = 1
[pid 2840] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2841] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2840] <... futex resumed>) = 0
[pid 2840] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2841] <... mount resumed>) = 0
[pid 2841] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2840] <... futex resumed>) = 0
[pid 2841] <... futex resumed>) = 1
[pid 2840] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2841] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2840] <... futex resumed>) = 0
[pid 2840] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2841] <... mount resumed>) = 0
[pid 2841] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2840] <... futex resumed>) = 0
[pid 2841] <... futex resumed>) = 1
[pid 2840] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2841] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2840] <... futex resumed>) = 0
[pid 2840] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2840] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2840] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2841] <... umount2 resumed>) = 0
[pid 2840] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2841] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2842 attached
) = 0
[pid 2841] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2840] <... clone resumed>, parent_tid=[2842], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2842
[pid 2842] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2840] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2842] <... set_robust_list resumed>) = 0
[pid 2840] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2842] umount2("./file0", MNT_DETACH) = 0
[pid 2842] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2840] <... futex resumed>) = 0
[pid 2842] <... futex resumed>) = 1
[pid 2840] exit_group(0 <unfinished ...>
[pid 2842] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2841] <... futex resumed>) = ?
[pid 2840] <... exit_group resumed>) = ?
[pid 2841] +++ exited with 0 +++
[pid 2842] <... futex resumed>) = ?
[pid 2842] +++ exited with 0 +++
[pid 2840] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2840, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2843 attached
, child_tidptr=0x5555560865d0) = 2843
[pid 2843] set_robust_list(0x5555560865e0, 24) = 0
[pid 2843] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2843] setpgid(0, 0) = 0
[pid 2843] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2843] write(3, "1000", 4) = 4
[pid 2843] close(3) = 0
[pid 2843] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2843] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2843] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2843] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2844 attached
, parent_tid=[2844], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2844
[pid 2844] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2844] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2843] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2844] <... futex resumed>) = 0
[pid 2844] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2844] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2844] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2843] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2843] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2844] <... futex resumed>) = 0
[pid 2844] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2843] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2844] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2844] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2843] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2843] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2844] <... futex resumed>) = 0
[pid 2844] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2843] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2844] <... mount resumed>) = 0
[pid 2844] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2844] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2843] <... futex resumed>) = 0
[pid 2843] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2844] <... futex resumed>) = 0
[pid 2844] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2843] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2844] <... umount2 resumed>) = 0
[pid 2844] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2844] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2843] <... futex resumed>) = 0
[pid 2843] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2843] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2843] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2845 attached
, parent_tid=[2845], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2845
[pid 2845] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2843] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2845] <... set_robust_list resumed>) = 0
[pid 2845] umount2("./file0", MNT_DETACH) = 0
[pid 2845] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2845] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2843] <... futex resumed>) = 1
[pid 2845] <... futex resumed>) = 0
[pid 2845] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2843] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2843] exit_group(0 <unfinished ...>
[pid 2844] <... futex resumed>) = ?
[pid 2843] <... exit_group resumed>) = ?
[pid 2844] +++ exited with 0 +++
[pid 2845] <... futex resumed>) = ?
[pid 2845] +++ exited with 0 +++
[pid 2843] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2843, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2846
./strace-static-x86_64: Process 2846 attached
[pid 2846] set_robust_list(0x5555560865e0, 24) = 0
[pid 2846] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2846] setpgid(0, 0) = 0
[pid 2846] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2846] write(3, "1000", 4) = 4
[pid 2846] close(3) = 0
[pid 2846] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2846] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2846] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2846] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2847 attached
, parent_tid=[2847], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2847
[pid 2846] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2847] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2846] <... futex resumed>) = 0
[pid 2847] <... set_robust_list resumed>) = 0
[pid 2846] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2847] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2847] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2846] <... futex resumed>) = 0
[pid 2847] <... futex resumed>) = 1
[pid 2846] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2847] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2846] <... futex resumed>) = 0
[pid 2846] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2847] <... mount resumed>) = 0
[pid 2847] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2846] <... futex resumed>) = 0
[pid 2846] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2846] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2847] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2847] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2846] <... futex resumed>) = 0
[pid 2846] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2846] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2846] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2846] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2847] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2846] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2848], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2848
[pid 2846] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2846] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2848 attached
<unfinished ...>
[pid 2847] <... umount2 resumed>) = 0
[pid 2848] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2848] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2847] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2848] <... umount2 resumed>) = 0
[pid 2848] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2846] <... futex resumed>) = 0
[pid 2846] exit_group(0) = ?
[pid 2848] <... futex resumed>) = ?
[pid 2847] <... futex resumed>) = ?
[pid 2848] +++ exited with 0 +++
[pid 2847] +++ exited with 0 +++
[pid 2846] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2846, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2849
./strace-static-x86_64: Process 2849 attached
[pid 2849] set_robust_list(0x5555560865e0, 24) = 0
[pid 2849] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2849] setpgid(0, 0) = 0
[pid 2849] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2849] write(3, "1000", 4) = 4
[pid 2849] close(3) = 0
[pid 2849] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2849] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2849] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2849] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2850 attached
<unfinished ...>
[pid 2850] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2850] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2849] <... clone resumed>, parent_tid=[2850], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2850
[pid 2849] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2850] <... futex resumed>) = 0
[pid 2849] <... futex resumed>) = 1
[pid 2850] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2850] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2849] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2850] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2849] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2849] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2850] <... futex resumed>) = 0
[pid 2850] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2849] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2850] <... mount resumed>) = 0
[pid 2850] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2849] <... futex resumed>) = 0
[pid 2850] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2849] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2850] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2849] <... futex resumed>) = 0
[pid 2850] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2849] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2850] <... mount resumed>) = 0
[pid 2850] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2849] <... futex resumed>) = 0
[pid 2850] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2849] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2849] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2849] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2849] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2849] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2850] <... umount2 resumed>) = 0
[pid 2850] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2849] <... clone resumed>, parent_tid=[2851], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2851
[pid 2850] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2849] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000./strace-static-x86_64: Process 2851 attached
) = 0
[pid 2851] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2849] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2851] <... set_robust_list resumed>) = 0
[pid 2851] umount2("./file0", MNT_DETACH) = 0
[pid 2851] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2849] <... futex resumed>) = 0
[pid 2851] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2849] exit_group(0 <unfinished ...>
[pid 2850] <... futex resumed>) = ?
[pid 2849] <... exit_group resumed>) = ?
[pid 2851] <... futex resumed>) = ?
[pid 2850] +++ exited with 0 +++
[pid 2851] +++ exited with 0 +++
[pid 2849] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2849, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2852 attached
, child_tidptr=0x5555560865d0) = 2852
[pid 2852] set_robust_list(0x5555560865e0, 24) = 0
[pid 2852] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2852] setpgid(0, 0) = 0
[pid 2852] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2852] write(3, "1000", 4) = 4
[pid 2852] close(3) = 0
[pid 2852] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2852] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2852] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2852] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2853], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2853
./strace-static-x86_64: Process 2853 attached
[pid 2853] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2853] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2852] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2853] <... futex resumed>) = 0
[pid 2852] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2853] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2853] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2853] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2852] <... futex resumed>) = 0
[pid 2852] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2853] <... futex resumed>) = 0
[pid 2853] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2852] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2853] <... mount resumed>) = 0
[pid 2853] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2853] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2852] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2852] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2853] <... futex resumed>) = 0
[pid 2853] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2852] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2853] <... mount resumed>) = 0
[pid 2853] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2853] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2852] <... futex resumed>) = 0
[pid 2852] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2853] <... futex resumed>) = 0
[pid 2853] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2852] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2852] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2853] <... umount2 resumed>) = 0
[pid 2853] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2853] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2852] <... mmap resumed>) = 0x7f236e446000
[pid 2852] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2852] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2854 attached
, parent_tid=[2854], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2854
[pid 2854] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2854] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2852] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2854] <... futex resumed>) = 0
[pid 2852] <... futex resumed>) = 1
[pid 2854] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2852] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2854] <... umount2 resumed>) = 0
[pid 2854] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2854] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2852] <... futex resumed>) = 0
[pid 2852] exit_group(0 <unfinished ...>
[pid 2853] <... futex resumed>) = ?
[pid 2852] <... exit_group resumed>) = ?
[pid 2853] +++ exited with 0 +++
[pid 2854] <... futex resumed>) = ?
[pid 2854] +++ exited with 0 +++
[pid 2852] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2852, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2855
./strace-static-x86_64: Process 2855 attached
[pid 2855] set_robust_list(0x5555560865e0, 24) = 0
[pid 2855] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2855] setpgid(0, 0) = 0
[pid 2855] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2855] write(3, "1000", 4) = 4
[pid 2855] close(3) = 0
[pid 2855] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2855] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2855] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2855] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2856], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2856
./strace-static-x86_64: Process 2856 attached
[pid 2856] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2856] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2855] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2856] <... futex resumed>) = 0
[pid 2856] mkdir("./file0", 000 <unfinished ...>
[pid 2855] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2856] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2856] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2856] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2855] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2855] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2855] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2856] <... futex resumed>) = 0
[pid 2856] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2856] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2856] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2855] <... futex resumed>) = 0
[pid 2855] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2856] <... futex resumed>) = 0
[pid 2855] <... futex resumed>) = 1
[pid 2856] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2855] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2856] <... mount resumed>) = 0
[pid 2856] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2856] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2855] <... futex resumed>) = 0
[pid 2855] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2856] <... futex resumed>) = 0
[pid 2855] <... futex resumed>) = 1
[pid 2856] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2855] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2855] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2855] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2855] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2856] <... umount2 resumed>) = 0
[pid 2856] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2855] <... clone resumed>, parent_tid=[2857], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2857
[pid 2856] <... futex resumed>) = 0
[pid 2855] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2856] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2855] <... futex resumed>) = 0
[pid 2855] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2857 attached
<unfinished ...>
[pid 2857] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2857] umount2("./file0", MNT_DETACH) = 0
[pid 2857] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2855] <... futex resumed>) = 0
[pid 2857] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2855] exit_group(0) = ?
[pid 2856] <... futex resumed>) = ?
[pid 2856] +++ exited with 0 +++
[pid 2857] <... futex resumed>) = ?
[pid 2857] +++ exited with 0 +++
[pid 2855] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2855, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2858 attached
, child_tidptr=0x5555560865d0) = 2858
[pid 2858] set_robust_list(0x5555560865e0, 24) = 0
[pid 2858] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2858] setpgid(0, 0) = 0
[pid 2858] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2858] write(3, "1000", 4) = 4
[pid 2858] close(3) = 0
[pid 2858] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2858] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2858] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2858] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2859 attached
<unfinished ...>
[pid 2859] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2858] <... clone resumed>, parent_tid=[2859], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2859
[pid 2859] <... set_robust_list resumed>) = 0
[pid 2858] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2859] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2859] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2859] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2858] <... futex resumed>) = 1
[pid 2859] <... futex resumed>) = 0
[pid 2858] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2859] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2858] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2858] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2859] <... futex resumed>) = 0
[pid 2858] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2859] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2859] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2859] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2858] <... futex resumed>) = 0
[pid 2858] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2859] <... futex resumed>) = 0
[pid 2858] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2859] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2859] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2858] <... futex resumed>) = 0
[pid 2859] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2858] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2858] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2858] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2858] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2858] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2859] <... umount2 resumed>) = 0
[pid 2859] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2859] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2858] <... clone resumed>, parent_tid=[2860], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2860
./strace-static-x86_64: Process 2860 attached
[pid 2858] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2860] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2858] <... futex resumed>) = 0
[pid 2860] <... set_robust_list resumed>) = 0
[pid 2858] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2860] umount2("./file0", MNT_DETACH) = 0
[pid 2860] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2858] <... futex resumed>) = 0
[pid 2860] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2858] exit_group(0) = ?
[pid 2859] <... futex resumed>) = ?
[pid 2859] +++ exited with 0 +++
[pid 2860] <... futex resumed>) = ?
[pid 2860] +++ exited with 0 +++
[pid 2858] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2858, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2861
./strace-static-x86_64: Process 2861 attached
[pid 2861] set_robust_list(0x5555560865e0, 24) = 0
[pid 2861] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2861] setpgid(0, 0) = 0
[pid 2861] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2861] write(3, "1000", 4) = 4
[pid 2861] close(3) = 0
[pid 2861] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2861] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2861] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2861] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2862 attached
, parent_tid=[2862], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2862
[pid 2862] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2861] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2861] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2862] <... set_robust_list resumed>) = 0
[pid 2862] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2862] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2861] <... futex resumed>) = 0
[pid 2861] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2861] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2862] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2862] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2861] <... futex resumed>) = 0
[pid 2861] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2861] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2862] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2862] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2861] <... futex resumed>) = 0
[pid 2862] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2861] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2861] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2861] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2861] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2861] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2862] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2861] <... clone resumed>, parent_tid=[2863], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2863
[pid 2862] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2861] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2861] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2863 attached
<unfinished ...>
[pid 2863] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2863] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2862] <... umount2 resumed>) = 0
[pid 2863] <... umount2 resumed>) = 0
[pid 2863] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2862] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2863] <... futex resumed>) = 1
[pid 2862] <... futex resumed>) = 0
[pid 2861] <... futex resumed>) = 0
[pid 2861] exit_group(0) = ?
[pid 2863] +++ exited with 0 +++
[pid 2862] +++ exited with 0 +++
[pid 2861] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2861, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2864
./strace-static-x86_64: Process 2864 attached
[pid 2864] set_robust_list(0x5555560865e0, 24) = 0
[pid 2864] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2864] setpgid(0, 0) = 0
[pid 2864] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2864] write(3, "1000", 4) = 4
[pid 2864] close(3) = 0
[pid 2864] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2864] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2864] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2864] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2865 attached
, parent_tid=[2865], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2865
[pid 2864] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2864] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2865] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2865] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2865] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2864] <... futex resumed>) = 0
[pid 2865] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2864] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2864] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2865] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2865] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2865] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2864] <... futex resumed>) = 0
[pid 2864] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2864] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2865] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2865] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2864] <... futex resumed>) = 0
[pid 2864] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2864] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2864] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2865] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2864] <... mmap resumed>) = 0x7f236e446000
[pid 2864] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2864] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2866], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2866
[pid 2864] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2865] <... umount2 resumed>) = 0
[pid 2864] <... futex resumed>) = 0
[pid 2864] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2866 attached
<unfinished ...>
[pid 2866] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2865] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2866] <... set_robust_list resumed>) = 0
[pid 2866] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2865] <... futex resumed>) = 0
[pid 2865] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2866] <... umount2 resumed>) = 0
[pid 2866] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2864] <... futex resumed>) = 0
[pid 2864] exit_group(0) = ?
[pid 2865] <... futex resumed>) = ?
[pid 2866] <... futex resumed>) = ?
[pid 2866] +++ exited with 0 +++
[pid 2865] +++ exited with 0 +++
[pid 2864] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2864, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2867
./strace-static-x86_64: Process 2867 attached
[pid 2867] set_robust_list(0x5555560865e0, 24) = 0
[pid 2867] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2867] setpgid(0, 0) = 0
[pid 2867] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2867] write(3, "1000", 4) = 4
[pid 2867] close(3) = 0
[pid 2867] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2867] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2867] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2867] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2868], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2868
./strace-static-x86_64: Process 2868 attached
[pid 2867] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2867] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2868] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2868] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2868] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2868] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2867] <... futex resumed>) = 0
[pid 2867] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2867] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2868] <... futex resumed>) = 0
[pid 2868] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2868] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2867] <... futex resumed>) = 0
[pid 2868] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2867] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2867] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2868] <... mount resumed>) = 0
[pid 2868] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2867] <... futex resumed>) = 0
[pid 2867] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2867] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2867] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2867] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2867] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2868] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2867] <... clone resumed>, parent_tid=[2869], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2869
[pid 2867] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2867] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2869 attached
<unfinished ...>
[pid 2869] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2869] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2868] <... umount2 resumed>) = 0
[pid 2869] <... umount2 resumed>) = 0
[pid 2868] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2869] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2868] <... futex resumed>) = 0
[pid 2869] <... futex resumed>) = 1
[pid 2868] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2867] <... futex resumed>) = 0
[pid 2867] exit_group(0) = ?
[pid 2868] <... futex resumed>) = -1 (errno 18446744073709551555)
[pid 2869] +++ exited with 0 +++
[pid 2868] +++ exited with 0 +++
[pid 2867] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2867, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2870
./strace-static-x86_64: Process 2870 attached
[pid 2870] set_robust_list(0x5555560865e0, 24) = 0
[pid 2870] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2870] setpgid(0, 0) = 0
[pid 2870] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2870] write(3, "1000", 4) = 4
[pid 2870] close(3) = 0
[pid 2870] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2870] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2870] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2870] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2871], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2871
[pid 2870] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2870] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2871 attached
<unfinished ...>
[pid 2871] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2871] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2871] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2870] <... futex resumed>) = 0
[pid 2870] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2870] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2871] <... futex resumed>) = 1
[pid 2871] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2871] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2870] <... futex resumed>) = 0
[pid 2870] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2870] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2871] <... futex resumed>) = 1
[pid 2871] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2871] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2870] <... futex resumed>) = 0
[pid 2870] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2870] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2870] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2870] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2871] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2870] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2872], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2872
[pid 2870] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2870] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2872 attached
<unfinished ...>
[pid 2872] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2872] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2871] <... umount2 resumed>) = 0
[pid 2871] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2872] <... umount2 resumed>) = 0
[pid 2872] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2870] <... futex resumed>) = 0
[pid 2870] exit_group(0) = ?
[pid 2872] <... futex resumed>) = ?
[pid 2871] <... futex resumed>) = ?
[pid 2872] +++ exited with 0 +++
[pid 2871] +++ exited with 0 +++
[pid 2870] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2870, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2873
./strace-static-x86_64: Process 2873 attached
[pid 2873] set_robust_list(0x5555560865e0, 24) = 0
[pid 2873] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2873] setpgid(0, 0) = 0
[pid 2873] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2873] write(3, "1000", 4) = 4
[pid 2873] close(3) = 0
[pid 2873] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2873] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2873] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2873] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2874 attached
, parent_tid=[2874], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2874
[pid 2873] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2873] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2874] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2874] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2874] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2873] <... futex resumed>) = 0
[pid 2873] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2873] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2874] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2874] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2873] <... futex resumed>) = 0
[pid 2873] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2873] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2874] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2874] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2873] <... futex resumed>) = 0
[pid 2873] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2873] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2873] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2873] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2873] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2874] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2873] <... clone resumed>, parent_tid=[2875], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2875
[pid 2873] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2873] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2875 attached
<unfinished ...>
[pid 2875] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2875] umount2("./file0", MNT_DETACH) = 0
[pid 2874] <... umount2 resumed>) = 0
[pid 2875] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2873] <... futex resumed>) = 0
[pid 2875] <... futex resumed>) = 1
[pid 2874] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2875] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2874] <... futex resumed>) = 0
[pid 2874] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2873] exit_group(0) = ?
[pid 2875] <... futex resumed>) = ?
[pid 2875] +++ exited with 0 +++
[pid 2874] <... futex resumed>) = ?
[pid 2874] +++ exited with 0 +++
[pid 2873] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2873, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2876
./strace-static-x86_64: Process 2876 attached
[pid 2876] set_robust_list(0x5555560865e0, 24) = 0
[pid 2876] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2876] setpgid(0, 0) = 0
[pid 2876] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2876] write(3, "1000", 4) = 4
[pid 2876] close(3) = 0
[pid 2876] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2876] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2876] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2876] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2877], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2877
./strace-static-x86_64: Process 2877 attached
[pid 2877] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2877] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2876] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2877] <... futex resumed>) = 0
[pid 2876] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2877] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2877] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2876] <... futex resumed>) = 0
[pid 2877] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2876] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2877] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2877] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2876] <... futex resumed>) = 0
[pid 2876] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2877] <... mount resumed>) = 0
[pid 2877] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2877] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2876] <... futex resumed>) = 0
[pid 2876] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2877] <... futex resumed>) = 0
[pid 2876] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2877] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2877] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2877] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2876] <... futex resumed>) = 0
[pid 2876] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2877] <... futex resumed>) = 0
[pid 2876] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2877] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2876] <... futex resumed>) = 0
[pid 2877] <... umount2 resumed>) = 0
[pid 2877] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2876] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2877] <... futex resumed>) = 0
[pid 2876] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2877] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2876] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2878], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2878
./strace-static-x86_64: Process 2878 attached
[pid 2876] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2876] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2878] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2878] umount2("./file0", MNT_DETACH) = 0
[pid 2878] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2876] <... futex resumed>) = 0
[pid 2878] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2876] exit_group(0 <unfinished ...>
[pid 2877] <... futex resumed>) = ?
[pid 2876] <... exit_group resumed>) = ?
[pid 2877] +++ exited with 0 +++
[pid 2878] <... futex resumed>) = ?
[pid 2878] +++ exited with 0 +++
[pid 2876] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2876, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2879
./strace-static-x86_64: Process 2879 attached
[pid 2879] set_robust_list(0x5555560865e0, 24) = 0
[pid 2879] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2879] setpgid(0, 0) = 0
[pid 2879] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2879] write(3, "1000", 4) = 4
[pid 2879] close(3) = 0
[pid 2879] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2879] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2879] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2879] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2880 attached
<unfinished ...>
[pid 2880] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2880] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2879] <... clone resumed>, parent_tid=[2880], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2880
[pid 2879] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2880] <... futex resumed>) = 0
[pid 2880] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2880] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2880] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2879] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2879] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2880] <... futex resumed>) = 0
[pid 2880] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2879] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2880] <... mount resumed>) = 0
[pid 2880] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2880] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2879] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2879] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2880] <... futex resumed>) = 0
[pid 2879] <... futex resumed>) = 1
[pid 2880] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2879] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2880] <... mount resumed>) = 0
[pid 2880] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2880] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2879] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2879] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2880] <... futex resumed>) = 0
[pid 2880] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2879] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2880] <... umount2 resumed>) = 0
[pid 2880] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2880] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2879] <... futex resumed>) = 0
[pid 2879] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2879] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2879] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2881 attached
<unfinished ...>
[pid 2881] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2881] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2879] <... clone resumed>, parent_tid=[2881], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2881
[pid 2879] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2881] <... futex resumed>) = 0
[pid 2879] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2881] umount2("./file0", MNT_DETACH) = 0
[pid 2881] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2879] <... futex resumed>) = 0
[pid 2881] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2879] exit_group(0 <unfinished ...>
[pid 2880] <... futex resumed>) = ?
[pid 2879] <... exit_group resumed>) = ?
[pid 2880] +++ exited with 0 +++
[pid 2881] <... futex resumed>) = ?
[pid 2881] +++ exited with 0 +++
[pid 2879] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2879, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2882
./strace-static-x86_64: Process 2882 attached
[pid 2882] set_robust_list(0x5555560865e0, 24) = 0
[pid 2882] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2882] setpgid(0, 0) = 0
[pid 2882] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2882] write(3, "1000", 4) = 4
[pid 2882] close(3) = 0
[pid 2882] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2882] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2882] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2882] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2883 attached
<unfinished ...>
[pid 2883] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2883] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2882] <... clone resumed>, parent_tid=[2883], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2883
[pid 2882] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2883] <... futex resumed>) = 0
[pid 2883] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2882] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2883] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2882] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2883] <... futex resumed>) = 0
[pid 2883] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2882] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2883] <... futex resumed>) = 0
[pid 2883] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2882] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2883] <... mount resumed>) = 0
[pid 2883] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2882] <... futex resumed>) = 0
[pid 2883] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2882] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2883] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2882] <... futex resumed>) = 0
[pid 2883] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2882] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2883] <... mount resumed>) = 0
[pid 2883] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2882] <... futex resumed>) = 0
[pid 2883] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2882] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2882] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2882] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2883] <... umount2 resumed>) = 0
[pid 2883] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2882] <... mmap resumed>) = 0x7f236e446000
[pid 2882] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2883] <... futex resumed>) = 0
[pid 2883] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2882] <... mprotect resumed>) = 0
[pid 2882] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2884 attached
, parent_tid=[2884], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2884
[pid 2884] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2882] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2884] <... set_robust_list resumed>) = 0
[pid 2882] <... futex resumed>) = 0
[pid 2884] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2882] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2884] <... umount2 resumed>) = 0
[pid 2884] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2884] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2882] <... futex resumed>) = 0
[pid 2882] exit_group(0) = ?
[pid 2883] <... futex resumed>) = ?
[pid 2883] +++ exited with 0 +++
[pid 2884] <... futex resumed>) = ?
[pid 2884] +++ exited with 0 +++
[pid 2882] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2882, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2885
./strace-static-x86_64: Process 2885 attached
[pid 2885] set_robust_list(0x5555560865e0, 24) = 0
[pid 2885] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2885] setpgid(0, 0) = 0
[pid 2885] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2885] write(3, "1000", 4) = 4
[pid 2885] close(3) = 0
[pid 2885] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2885] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2885] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2885] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2886 attached
, parent_tid=[2886], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2886
[pid 2886] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2885] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2886] <... set_robust_list resumed>) = 0
[pid 2885] <... futex resumed>) = 0
[pid 2885] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2886] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2886] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2885] <... futex resumed>) = 0
[pid 2886] <... futex resumed>) = 1
[pid 2885] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2886] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2885] <... futex resumed>) = 0
[pid 2885] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2886] <... mount resumed>) = 0
[pid 2886] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2885] <... futex resumed>) = 0
[pid 2886] <... futex resumed>) = 1
[pid 2885] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2886] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2885] <... futex resumed>) = 0
[pid 2885] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2886] <... mount resumed>) = 0
[pid 2886] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2885] <... futex resumed>) = 0
[pid 2886] <... futex resumed>) = 1
[pid 2885] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2886] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2885] <... futex resumed>) = 0
[pid 2885] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2885] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2885] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2885] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2886] <... umount2 resumed>) = 0
./strace-static-x86_64: Process 2887 attached
[pid 2886] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2885] <... clone resumed>, parent_tid=[2887], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2887
[pid 2887] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2886] <... futex resumed>) = 0
[pid 2885] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2887] <... set_robust_list resumed>) = 0
[pid 2886] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2885] <... futex resumed>) = 0
[pid 2887] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2885] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2887] <... umount2 resumed>) = 0
[pid 2887] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2885] <... futex resumed>) = 0
[pid 2887] <... futex resumed>) = 1
[pid 2887] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2885] exit_group(0) = ?
[pid 2886] <... futex resumed>) = 231
[pid 2887] <... futex resumed>) = ?
[pid 2886] +++ exited with 0 +++
[pid 2887] +++ exited with 0 +++
[pid 2885] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2885, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2888
./strace-static-x86_64: Process 2888 attached
[pid 2888] set_robust_list(0x5555560865e0, 24) = 0
[pid 2888] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2888] setpgid(0, 0) = 0
[pid 2888] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2888] write(3, "1000", 4) = 4
[pid 2888] close(3) = 0
[pid 2888] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2888] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2888] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2888] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2889 attached
, parent_tid=[2889], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2889
[pid 2889] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2889] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2888] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2889] <... futex resumed>) = 0
[pid 2889] mkdir("./file0", 000 <unfinished ...>
[pid 2888] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2889] <... mkdir resumed>) = -1 EEXIST (File exists)
[pid 2889] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2888] <... futex resumed>) = 0
[pid 2888] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2888] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2889] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2889] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2888] <... futex resumed>) = 0
[pid 2888] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2888] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2889] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2889] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2888] <... futex resumed>) = 0
[pid 2889] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2888] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2888] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2888] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2889] <... umount2 resumed>) = 0
[pid 2888] <... mmap resumed>) = 0x7f236e446000
[pid 2889] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2888] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2889] <... futex resumed>) = 0
[pid 2888] <... mprotect resumed>) = 0
[pid 2889] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2888] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2890 attached
, parent_tid=[2890], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2890
[pid 2890] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2890] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2888] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2890] <... futex resumed>) = 0
[pid 2890] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2888] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2890] <... umount2 resumed>) = 0
[pid 2890] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2890] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2888] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2888] exit_group(0 <unfinished ...>
[pid 2889] <... futex resumed>) = 231
[pid 2888] <... exit_group resumed>) = ?
[pid 2889] +++ exited with 0 +++
[pid 2890] <... futex resumed>) = ?
[pid 2890] +++ exited with 0 +++
[pid 2888] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2888, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2891
./strace-static-x86_64: Process 2891 attached
[pid 2891] set_robust_list(0x5555560865e0, 24) = 0
[pid 2891] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2891] setpgid(0, 0) = 0
[pid 2891] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2891] write(3, "1000", 4) = 4
[pid 2891] close(3) = 0
[pid 2891] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2891] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2891] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2891] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2892 attached
<unfinished ...>
[pid 2892] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2892] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2891] <... clone resumed>, parent_tid=[2892], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2892
[pid 2891] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2892] <... futex resumed>) = 0
[pid 2891] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2892] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2892] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2891] <... futex resumed>) = 0
[pid 2891] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2891] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2892] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2892] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2891] <... futex resumed>) = 0
[pid 2892] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2891] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2891] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2892] <... mount resumed>) = 0
[pid 2892] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2891] <... futex resumed>) = 0
[pid 2891] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2891] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2891] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2891] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2891] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2893], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2893
[pid 2892] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2891] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2891] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2893 attached
<unfinished ...>
[pid 2892] <... umount2 resumed>) = 0
[pid 2893] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2893] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2892] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2892] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2893] <... umount2 resumed>) = 0
[pid 2893] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2891] <... futex resumed>) = 0
[pid 2893] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2891] exit_group(0 <unfinished ...>
[pid 2893] <... futex resumed>) = 231
[pid 2891] <... exit_group resumed>) = ?
[pid 2892] <... futex resumed>) = ?
[pid 2892] +++ exited with 0 +++
[pid 2893] +++ exited with 0 +++
[pid 2891] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2891, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2894
./strace-static-x86_64: Process 2894 attached
[pid 2894] set_robust_list(0x5555560865e0, 24) = 0
[pid 2894] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2894] setpgid(0, 0) = 0
[pid 2894] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2894] write(3, "1000", 4) = 4
[pid 2894] close(3) = 0
[pid 2894] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2894] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2894] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2894] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2895 attached
, parent_tid=[2895], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2895
[pid 2895] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2894] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2895] <... set_robust_list resumed>) = 0
[pid 2894] <... futex resumed>) = 0
[pid 2894] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2895] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2895] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2895] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2894] <... futex resumed>) = 0
[pid 2894] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2894] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2895] <... futex resumed>) = 0
[pid 2895] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2895] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2894] <... futex resumed>) = 0
[pid 2894] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2894] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2895] <... futex resumed>) = 1
[pid 2895] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2895] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2894] <... futex resumed>) = 0
[pid 2894] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2894] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2894] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2894] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2894] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2896], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2896
[pid 2894] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2894] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2895] <... futex resumed>) = 1
[pid 2895] umount2("./file0", MNT_DETACH) = 0
[pid 2895] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2895] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2896 attached
<unfinished ...>
[pid 2896] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2896] umount2("./file0", MNT_DETACH) = 0
[pid 2896] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2894] <... futex resumed>) = 0
[pid 2894] exit_group(0) = ?
[pid 2895] <... futex resumed>) = ?
[pid 2895] +++ exited with 0 +++
[pid 2896] <... futex resumed>) = ?
[pid 2896] +++ exited with 0 +++
[pid 2894] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2894, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2897
./strace-static-x86_64: Process 2897 attached
[pid 2897] set_robust_list(0x5555560865e0, 24) = 0
[pid 2897] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2897] setpgid(0, 0) = 0
[pid 2897] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2897] write(3, "1000", 4) = 4
[pid 2897] close(3) = 0
[pid 2897] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2897] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2897] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2897] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2898], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2898
[pid 2897] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2897] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2898 attached
<unfinished ...>
[pid 2898] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2898] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2898] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2897] <... futex resumed>) = 0
[pid 2897] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2897] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2898] <... futex resumed>) = 1
[pid 2898] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2898] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2897] <... futex resumed>) = 0
[pid 2897] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2897] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2898] <... futex resumed>) = 1
[pid 2898] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2898] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2897] <... futex resumed>) = 0
[pid 2897] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2897] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2897] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2897] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2897] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2899], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2899
[pid 2897] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2897] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2899 attached
<unfinished ...>
[pid 2898] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2899] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2898] <... umount2 resumed>) = 0
[pid 2899] <... set_robust_list resumed>) = 0
[pid 2898] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2899] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2898] <... futex resumed>) = 0
[pid 2898] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2899] <... umount2 resumed>) = 0
[pid 2899] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2897] <... futex resumed>) = 0
[pid 2899] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2897] exit_group(0 <unfinished ...>
[pid 2898] <... futex resumed>) = ?
[pid 2899] <... futex resumed>) = ?
[pid 2897] <... exit_group resumed>) = ?
[pid 2898] +++ exited with 0 +++
[pid 2899] +++ exited with 0 +++
[pid 2897] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2897, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2900
./strace-static-x86_64: Process 2900 attached
[pid 2900] set_robust_list(0x5555560865e0, 24) = 0
[pid 2900] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2900] setpgid(0, 0) = 0
[pid 2900] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2900] write(3, "1000", 4) = 4
[pid 2900] close(3) = 0
[pid 2900] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2900] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2900] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2900] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2901 attached
, parent_tid=[2901], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2901
[pid 2901] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2901] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2900] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2901] <... futex resumed>) = 0
[pid 2901] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2900] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2901] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2901] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2900] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2900] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2901] <... futex resumed>) = 0
[pid 2901] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2900] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2901] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2900] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2901] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2900] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2901] <... futex resumed>) = 0
[pid 2901] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2900] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2901] <... mount resumed>) = 0
[pid 2901] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2901] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2900] <... futex resumed>) = 0
[pid 2900] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2901] <... futex resumed>) = 0
[pid 2900] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2901] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2900] <... futex resumed>) = 0
[pid 2900] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2900] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2901] <... umount2 resumed>) = 0
[pid 2900] <... mprotect resumed>) = 0
[pid 2901] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2900] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2901] <... futex resumed>) = 0
[pid 2901] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL./strace-static-x86_64: Process 2902 attached
<unfinished ...>
[pid 2900] <... clone resumed>, parent_tid=[2902], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2902
[pid 2902] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2900] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2902] <... set_robust_list resumed>) = 0
[pid 2900] <... futex resumed>) = 0
[pid 2902] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2900] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2902] <... umount2 resumed>) = 0
[pid 2902] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2900] <... futex resumed>) = 0
[pid 2902] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2900] exit_group(0) = ?
[pid 2901] <... futex resumed>) = ?
[pid 2901] +++ exited with 0 +++
[pid 2902] <... futex resumed>) = ?
[pid 2902] +++ exited with 0 +++
[pid 2900] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2900, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 2903 attached
, child_tidptr=0x5555560865d0) = 2903
[pid 2903] set_robust_list(0x5555560865e0, 24) = 0
[pid 2903] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2903] setpgid(0, 0) = 0
[pid 2903] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2903] write(3, "1000", 4) = 4
[pid 2903] close(3) = 0
[pid 2903] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2903] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2903] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2903] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2904 attached
, parent_tid=[2904], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2904
[pid 2903] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2903] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2904] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2904] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2904] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2904] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2903] <... futex resumed>) = 0
[pid 2903] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2903] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2904] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2904] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2904] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2903] <... futex resumed>) = 0
[pid 2904] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2903] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2903] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2904] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2904] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2904] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2903] <... futex resumed>) = 0
[pid 2904] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2903] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2903] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2903] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2903] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2903] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID <unfinished ...>
[pid 2904] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2904] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2903] <... clone resumed>, parent_tid=[2905], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2905
[pid 2903] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2903] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2905 attached
<unfinished ...>
[pid 2905] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2905] umount2("./file0", MNT_DETACH) = 0
[pid 2905] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2903] <... futex resumed>) = 0
[pid 2905] <... futex resumed>) = 1
[pid 2905] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2904] <... umount2 resumed>) = 0
[pid 2904] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2904] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2903] exit_group(0) = ?
[pid 2905] <... futex resumed>) = ?
[pid 2905] +++ exited with 0 +++
[pid 2904] <... futex resumed>) = ?
[pid 2904] +++ exited with 0 +++
[pid 2903] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2903, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2906
./strace-static-x86_64: Process 2906 attached
[pid 2906] set_robust_list(0x5555560865e0, 24) = 0
[pid 2906] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2906] setpgid(0, 0) = 0
[pid 2906] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2906] write(3, "1000", 4) = 4
[pid 2906] close(3) = 0
[pid 2906] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2906] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2906] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2906] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2907 attached
, parent_tid=[2907], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2907
[pid 2907] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2907] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2906] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2907] <... futex resumed>) = 0
[pid 2906] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2907] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2907] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2907] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2906] <... futex resumed>) = 0
[pid 2906] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2907] <... futex resumed>) = 0
[pid 2907] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2906] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2907] <... mount resumed>) = 0
[pid 2907] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2906] <... futex resumed>) = 0
[pid 2906] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2906] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2907] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2907] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2906] <... futex resumed>) = 0
[pid 2906] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2906] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2906] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2907] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2906] <... mmap resumed>) = 0x7f236e446000
[pid 2906] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2906] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, parent_tid=[2908], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2908
[pid 2906] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2906] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}./strace-static-x86_64: Process 2908 attached
<unfinished ...>
[pid 2908] set_robust_list(0x7f236e4669e0, 24) = 0
[pid 2908] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2907] <... umount2 resumed>) = 0
[pid 2907] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2908] <... umount2 resumed>) = 0
[pid 2908] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2906] <... futex resumed>) = 0
[pid 2906] exit_group(0) = ?
[pid 2907] <... futex resumed>) = ?
[pid 2908] <... futex resumed>) = ?
[pid 2908] +++ exited with 0 +++
[pid 2907] +++ exited with 0 +++
[pid 2906] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2906, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2909
./strace-static-x86_64: Process 2909 attached
[pid 2909] set_robust_list(0x5555560865e0, 24) = 0
[pid 2909] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2909] setpgid(0, 0) = 0
[pid 2909] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2909] write(3, "1000", 4) = 4
[pid 2909] close(3) = 0
[pid 2909] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2909] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2909] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2909] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2910 attached
, parent_tid=[2910], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2910
[pid 2910] set_robust_list(0x7f236e4879e0, 24 <unfinished ...>
[pid 2909] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2910] <... set_robust_list resumed>) = 0
[pid 2909] <... futex resumed>) = 0
[pid 2909] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2910] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2910] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2909] <... futex resumed>) = 0
[pid 2910] <... futex resumed>) = 1
[pid 2909] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2910] mount(NULL, "./file0", "ramfs", 0, NULL <unfinished ...>
[pid 2909] <... futex resumed>) = 0
[pid 2909] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2910] <... mount resumed>) = 0
[pid 2910] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2909] <... futex resumed>) = 0
[pid 2910] <... futex resumed>) = 1
[pid 2909] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2910] mount("./file0", "./file0", "incremental-fs", 0, NULL <unfinished ...>
[pid 2909] <... futex resumed>) = 0
[pid 2909] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2910] <... mount resumed>) = 0
[pid 2910] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2909] <... futex resumed>) = 0
[pid 2910] <... futex resumed>) = 1
[pid 2909] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2910] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2909] <... futex resumed>) = 0
[pid 2909] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2909] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e446000
[pid 2909] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2909] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2911 attached
<unfinished ...>
[pid 2910] <... umount2 resumed>) = 0
[pid 2911] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2910] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2911] <... set_robust_list resumed>) = 0
[pid 2909] <... clone resumed>, parent_tid=[2911], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2911
[pid 2910] <... futex resumed>) = 0
[pid 2911] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2909] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2910] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2911] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2909] <... futex resumed>) = 0
[pid 2911] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2909] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2911] <... umount2 resumed>) = 0
[pid 2911] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2909] <... futex resumed>) = 0
[pid 2911] <... futex resumed>) = 1
[pid 2911] futex(0x7f236e55d3f8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2909] exit_group(0) = ?
[pid 2910] <... futex resumed>) = 231
[pid 2911] <... futex resumed>) = ?
[pid 2910] +++ exited with 0 +++
[pid 2911] +++ exited with 0 +++
[pid 2909] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2909, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560865d0) = 2912
./strace-static-x86_64: Process 2912 attached
[pid 2912] set_robust_list(0x5555560865e0, 24) = 0
[pid 2912] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 2912] setpgid(0, 0) = 0
[pid 2912] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 2912] write(3, "1000", 4) = 4
[pid 2912] close(3) = 0
[pid 2912] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2912] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f236e467000
[pid 2912] mprotect(0x7f236e468000, 131072, PROT_READ|PROT_WRITE) = 0
[pid 2912] clone(child_stack=0x7f236e4873f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2913 attached
, parent_tid=[2913], tls=0x7f236e487700, child_tidptr=0x7f236e4879d0) = 2913
[pid 2913] set_robust_list(0x7f236e4879e0, 24) = 0
[pid 2913] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2912] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2913] <... futex resumed>) = 0
[pid 2913] mkdir("./file0", 000) = -1 EEXIST (File exists)
[pid 2913] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2913] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2912] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2912] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2913] <... futex resumed>) = 0
[pid 2913] mount(NULL, "./file0", "ramfs", 0, NULL) = 0
[pid 2912] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2913] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2912] <... futex resumed>) = 0
[pid 2912] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000) = 0
[pid 2912] futex(0x7f236e55d3ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2913] mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0
[pid 2913] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2912] <... futex resumed>) = 0
[pid 2913] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2912] futex(0x7f236e55d3e8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2913] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable)
[pid 2913] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2912] <... futex resumed>) = 0
[pid 2912] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2913] <... umount2 resumed>) = 0
[pid 2912] <... futex resumed>) = 0
[pid 2912] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0 <unfinished ...>
[pid 2913] futex(0x7f236e55d3ec, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2912] <... mmap resumed>) = 0x7f236e446000
[pid 2913] <... futex resumed>) = 0
[pid 2912] mprotect(0x7f236e447000, 131072, PROT_READ|PROT_WRITE <unfinished ...>
[pid 2913] futex(0x7f236e55d3e8, FUTEX_WAIT_PRIVATE, 0, NULL <unfinished ...>
[pid 2912] <... mprotect resumed>) = 0
[pid 2912] clone(child_stack=0x7f236e4663f0, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID./strace-static-x86_64: Process 2914 attached
, parent_tid=[2914], tls=0x7f236e466700, child_tidptr=0x7f236e4669d0) = 2914
[pid 2914] set_robust_list(0x7f236e4669e0, 24 <unfinished ...>
[pid 2912] futex(0x7f236e55d3f8, FUTEX_WAKE_PRIVATE, 1000000 <unfinished ...>
[pid 2914] <... set_robust_list resumed>) = 0
[pid 2912] <... futex resumed>) = 0
[pid 2914] umount2("./file0", MNT_DETACH <unfinished ...>
[pid 2912] futex(0x7f236e55d3fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} <unfinished ...>
[pid 2914] <... umount2 resumed>) = 0
[pid 2914] futex(0x7f236e55d3fc, FUTEX_WAKE_PRIVATE, 1000000) = 1
[pid 2912] <... futex resumed>) = 0
[pid 2912] exit_group(0 <unfinished ...>
[pid 2913] <... futex resumed>) = ?
[pid 2912] <... exit_group resumed>) = ?
[pid 2913] +++ exited with 0 +++
[pid 2914] +++ exited with 0 +++
[pid 2912] +++ exited with 0 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=2912, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
restart_syscall(<... resuming interrupted clone ...>) = 0