rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=129425, q=246 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10486 (4295078586-4295068100), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10486 jiffies! g129425 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:27680 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0xe37/0x5490 kernel/sched/core.c:6529
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:6851
 irqentry_exit+0x36/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__timer_delete_sync+0x11c/0x1b0 kernel/time/timer.c:1671
Code: ff ff 31 ff 89 c3 89 c6 e8 81 6c 13 00 85 db 78 12 e8 38 6a 13 00 89 d8 5b 5d 41 5c 41 5d c3 cc cc cc cc e8 26 6a 13 00 f3 90 <eb> c6 e8 1d 6a 13 00 90 0f 0b 90 eb b2 e8 12 6a 13 00 e8 1d b4 1a
RSP: 0018:ffffc90000167c00 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: ffffffff8178560f
RDX: ffff88801ced8000 RSI: ffffffff8178562a RDI: 0000000000000005
RBP: ffffc90000167c48 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000000 R12: 0000000000000000
R13: ffffc90000167c70 R14: 1ffffffff1b41e40 R15: 0000000000000001
 timer_delete_sync kernel/time/timer.c:1720 [inline]
 del_timer_sync include/linux/timer.h:185 [inline]
 schedule_timeout+0x140/0x2a0 kernel/time/timer.c:2582
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2034
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2236
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 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 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:111