Sur une VM j'ai le message : Uhhuh. NMI received for unknown reason 20 on CPU 13.

[farias]

Le logs :

13009083.343348] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
[13009083.343747] rcu: 	13-...0: (1 GPs behind) idle=ab84/1/0x4000000000000000 softirq=245007121/245007125 fqs=1122
[13009083.343977] 	(detected by 0, t=5253 jiffies, g=2065850385, q=1416 ncpus=16)
[13009083.344002] Sending NMI from CPU 0 to CPUs 13:
[13009093.283398] rcu: rcu_preempt kthread starved for 2476 jiffies! g2065850385 f0x0 RCU_GP_DOING_FQS(6) ->state=0x0 ->cpu=14
[13009093.283697] rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
[13009093.284012] rcu: RCU grace-period kthread stack dump:
[13009093.284298] task:rcu_preempt     state:I stack:0     pid:15    ppid:2      flags:0x00004000
[13009093.284339] Call Trace:
[13009093.284347]  <TASK>
[13009093.284382]  __schedule+0x34d/0x9e0
[13009093.284462]  ? rcu_gp_cleanup+0x460/0x460
[13009093.284492]  schedule+0x5a/0xd0
[13009093.284496]  schedule_timeout+0x94/0x150
[13009093.284516]  ? __bpf_trace_tick_stop+0x10/0x10
[13009093.284529]  rcu_gp_fqs_loop+0x141/0x550
[13009093.284545]  rcu_gp_kthread+0xd4/0x190
[13009093.284553]  kthread+0xda/0x100
[13009093.284603]  ? kthread_complete_and_exit+0x20/0x20
[13009093.284607]  ret_from_fork+0x22/0x30
[13009093.284639]  </TASK>
[13009093.284641] rcu: Stack dump where RCU GP kthread last ran:
[13009093.285010] Sending NMI from CPU 0 to CPUs 14:
[13009093.285092] NMI backtrace for cpu 14 skipped: idling at native_safe_halt+0xb/0x10
[13009105.808407] Uhhuh. NMI received for unknown reason 20 on CPU 13.
[13009105.808477] Dazed and confused, but trying to continue

Je vais faire un reboot.

[farias]

Le message continue malgré le reboot :

# dmesg | grep "watchdog:"
[ 6883.549640] watchdog: BUG: soft lockup - CPU#15 stuck for 26s! [ip_192.151.157.:120312]
[ 6883.549691] watchdog: BUG: soft lockup - CPU#11 stuck for 22s! [jbd2/sdb1-8:335]
[ 6883.550211] watchdog: BUG: soft lockup - CPU#2 stuck for 29s! [redis-server:742]
[ 6883.549647] watchdog: BUG: soft lockup - CPU#4 stuck for 26s! [khugepaged:118]
[ 6883.549717] watchdog: BUG: soft lockup - CPU#14 stuck for 21s! [systemd:1]
[ 6883.549645] watchdog: BUG: soft lockup - CPU#1 stuck for 28s! [php-fpm8.4:1265]
[ 6883.550441] watchdog: BUG: soft lockup - CPU#12 stuck for 25s! [kworker/u32:3:116325]
[ 6883.551937] watchdog: BUG: soft lockup - CPU#5 stuck for 25s! [kworker/5:3:630]
[ 6906.928988] watchdog: BUG: soft lockup - CPU#2 stuck for 21s! [ip_39.103.239.3:120458]
[ 6907.251975] watchdog: BUG: soft lockup - CPU#6 stuck for 21s! [khugepaged:118]
[ 6907.253369] watchdog: BUG: soft lockup - CPU#5 stuck for 21s! [kworker/5:3:630]
[10885.798469] watchdog: BUG: soft lockup - CPU#8 stuck for 21s! [dbus-daemon:635]
[10938.719661] watchdog: BUG: soft lockup - CPU#8 stuck for 21s! [jbd2/sdb1-8:335]
[10938.719773] watchdog: BUG: soft lockup - CPU#5 stuck for 21s! [kworker/5:1:141776]

[farias]

Mon processeur est du type host :

[farias]

j’ai pas fait de reboot depuis 150 jours …

# uptime
 17:18:26 up 150 days, 22:30,  0 users,  load average: 7.41, 7.81, 7.79
# uname -a
Linux balkany 6.17.9-1-pve #1 SMP PREEMPT_DYNAMIC PMX 6.17.9-1 (2026-01-12T16:25Z) x86_64 GNU/Linux