sched: RT throttling activated
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5229/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=9185, q=1011 ncpus=2)
task:udevd           state:R  running task     stack:24864 pid:5229  tgid:5229  ppid:4679   flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
 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:read_seqbegin+0x1d2/0x250 include/linux/seqlock.h:772
Code: f4 80 ff 4d 85 ed 75 16 e8 1b f4 80 ff eb 15 e8 14 f4 80 ff e8 6f 62 9e 09 4d 85 ed 74 ea e8 05 f4 80 ff fb 8b 1d de ae 2e 0c <89> de 83 e6 01 31 ff e8 32 f8 80 ff 89 d8 83 e0 01 75 07 e8 e6 f3
RSP: 0018:ffffc90003837700 EFLAGS: 00000293
RAX: ffffffff8212985b RBX: 0000000000000878 RCX: ffff888026301e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900038377b8 R08: ffffffff82129831 R09: 1ffffffff1fee85d
R10: dffffc0000000000 R11: fffffbfff1fee85e R12: 1ffff92000706ee0
R13: 0000000000000200 R14: 0000000000000046 R15: dffffc0000000000
 lookup_mnt+0xf9/0x490 fs/namespace.c:836
 __traverse_mounts+0x19c/0x580 fs/namei.c:1421
 traverse_mounts fs/namei.c:1468 [inline]
 handle_mounts fs/namei.c:1571 [inline]
 step_into+0x5e5/0x1080 fs/namei.c:1877
 walk_component fs/namei.c:2045 [inline]
 link_path_walk+0x7b7/0xea0 fs/namei.c:2404
 path_lookupat+0xa9/0x450 fs/namei.c:2565
 filename_lookup+0x256/0x610 fs/namei.c:2595
 user_path_at+0x3a/0x60 fs/namei.c:3002
 do_utimes_path fs/utimes.c:95 [inline]
 do_utimes+0x112/0x270 fs/utimes.c:145
 __do_sys_utimensat fs/utimes.c:164 [inline]
 __se_sys_utimensat fs/utimes.c:148 [inline]
 __x64_sys_utimensat+0x14f/0x250 fs/utimes.c:148
 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: 0033:0x7faa6c919fcc
RSP: 002b:00007ffeee7a70e8 EFLAGS: 00000202 ORIG_RAX: 0000000000000118
RAX: ffffffffffffffda RBX: 00007ffeee7a7188 RCX: 00007faa6c919fcc
RDX: 0000000000000000 RSI: 00007ffeee7a7aa8 RDI: 00000000ffffff9c
RBP: 00007ffeee7a7aa8 R08: 0000000000000000 R09: 00007ffeee7a7368
R10: 0000000000000100 R11: 0000000000000202 R12: 00007ffeee7a7588
R13: 0000558d93714920 R14: 0000558d93726780 R15: 00007ffeee7a7ab6
 </TASK>
rcu: rcu_preempt kthread starved for 10239 jiffies! g9185 f0x0 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:26448 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 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