rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P34/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=16949, q=1734 ncpus=2)
task:kdevtmpfs       state:R  running task     stack:22592 pid:34    tgid:34    ppid:2      task_flags:0x208140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5402 [inline]
 __schedule+0x16f9/0x5500 kernel/sched/core.c:7204
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7528
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x14f/0x8b0 kernel/entry/common.c:164
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:remove_partial mm/slub.c:3548 [inline]
RIP: 0010:get_partial_node_bulk mm/slub.c:3778 [inline]
RIP: 0010:__refill_objects_node+0x16d/0x620 mm/slub.c:7071
Code: 0e 48 8b 03 48 8b 4b 08 48 89 48 08 48 89 01 48 b8 00 01 00 00 00 00 ad de 48 89 03 48 8b 44 24 40 48 89 43 08 f0 80 63 f1 fd <49> ff 8e 80 00 00 00 4c 8b 74 24 70 48 89 df 48 8d 74 24 70 4c 89
RSP: 0018:ffffc90000a976e0 EFLAGS: 00000246
RAX: dead000000000122 RBX: ffffea000082dfd0 RCX: ffff88801c299788
RDX: ffffc90000a97750 RSI: ffffffff8d9d04f2 RDI: ffffea000082dfd8
RBP: ffffc90000a977b8 R08: ffffffff8b3cba20 R09: ffffffff8e1cac60
R10: dffffc0000000000 R11: fffffbfff1f5d99f R12: ffffea0000fbfb90
R13: 0000000000000006 R14: ffff88801c299700 R15: 000000000000001c
 refill_objects+0x62/0x3d0 mm/slub.c:7203
 refill_sheaf mm/slub.c:2827 [inline]
 __pcs_replace_empty_main+0x373/0x720 mm/slub.c:4665
 alloc_from_pcs mm/slub.c:4763 [inline]
 slab_alloc_node mm/slub.c:4897 [inline]
 kmem_cache_alloc_noprof+0x433/0x680 mm/slub.c:4919
 lsm_inode_alloc security/security.c:254 [inline]
 security_inode_alloc+0x39/0x310 security/security.c:1215
 inode_init_always_gfp+0x99a/0xd50 fs/inode.c:298
 inode_init_always include/linux/fs.h:2945 [inline]
 alloc_inode+0x82/0x1b0 fs/inode.c:345
 new_inode+0x22/0x170 fs/inode.c:1174
 __shmem_get_inode mm/shmem.c:3016 [inline]
 shmem_get_inode+0x3da/0xf70 mm/shmem.c:3087
 shmem_mknod+0x191/0x360 mm/shmem.c:3797
 vfs_mknod+0x44e/0x620 fs/namei.c:5109
 handle_create drivers/base/devtmpfs.c:232 [inline]
 handle drivers/base/devtmpfs.c:384 [inline]
 devtmpfs_work_loop+0x861/0xdf0 drivers/base/devtmpfs.c:399
 devtmpfsd+0x4d/0x50 drivers/base/devtmpfs.c:441
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>