sched: DL replenish lagged too much
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P16553/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=103685, q=1677421 ncpus=2)
task:cmp             state:R  running task     stack:22208 pid:16553 tgid:16553 ppid:16518  task_flags:0x400000 flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6764
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7086
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:filter_irq_stacks+0x4f/0xa0 kernel/stacktrace.c:397
Code: 30 b2 f8 8b 48 89 fb eb 0c 49 ff c7 48 83 c3 08 4d 39 fc 74 4f 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 48 89 df e8 67 c7 7a 00 4b 8b 04 fe 48 39 e8 72 0c 48 c7 c1
RSP: 0018:ffffc900056bf358 EFLAGS: 00000246
RAX: 1ffff92000ad7e8c RBX: ffffc900056bf460 RCX: dffffc0000000000
RDX: 0000000000002800 RSI: 0000000000000010 RDI: ffffc900056bf440
RBP: ffffffff81000230 R08: 000000000000000f R09: ffffc900056bf370
R10: ffffc900056bf2d0 R11: ffffffff81ab1dc0 R12: 0000000000000010
R13: ffffffff8bf8b230 R14: ffffc900056bf440 R15: 0000000000000004
 stack_depot_save_flags+0x37/0x940 lib/stackdepot.c:609
 save_stack+0x109/0x1f0 mm/page_owner.c:157
 __reset_page_owner+0x76/0x430 mm/page_owner.c:297
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2660
 discard_slab mm/slub.c:2684 [inline]
 __put_partials+0x160/0x1c0 mm/slub.c:3153
 put_cpu_partial+0x17c/0x250 mm/slub.c:3228
 __slab_free+0x290/0x380 mm/slub.c:4479
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4115 [inline]
 slab_alloc_node mm/slub.c:4164 [inline]
 kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4171
 vm_area_dup+0x27/0x290 kernel/fork.c:487
 __split_vma+0x1cb/0xc50 mm/vma.c:466
 split_vma mm/vma.c:542 [inline]
 vma_modify+0x244/0x330 mm/vma.c:1529
 vma_modify_flags+0x3a5/0x430 mm/vma.c:1547
 mprotect_fixup+0x45a/0xaa0 mm/mprotect.c:666
 do_mprotect_pkey+0x99e/0xde0 mm/mprotect.c:840
 __do_sys_mprotect mm/mprotect.c:861 [inline]
 __se_sys_mprotect mm/mprotect.c:858 [inline]
 __x64_sys_mprotect+0x80/0x90 mm/mprotect.c:858
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd8f47ddbb7
RSP: 002b:00007fff1166e508 EFLAGS: 00000206 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 00007fd8f47ba0c0 RCX: 00007fd8f47ddbb7
RDX: 0000000000000001 RSI: 0000000000003000 RDI: 00007fd8f47b6000
RBP: 00007fff1166e620 R08: 00007fff1166e498 R09: 00007fd8f47ba0c0
R10: 00007fd8f46fbb48 R11: 0000000000000206 R12: 00007fd8f47ba0c0
R13: 00007fd8f47e5eda R14: 00007fd8f47b8f28 R15: 00007fd8f47b82b8
 </TASK>
rcu: rcu_preempt kthread starved for 10127 jiffies! g103685 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:25624 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6764
 __schedule_loop kernel/sched/core.c:6841 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6856
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2024
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2226
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111