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ckenda1
Tux's lil' helper
Joined: 19 Feb 2004
Posts: 126
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 Posted: Tue Sep 07, 2010 5:23 pm Post subject: Dell R610 locking up every so often |
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When it locks up I get the following message in the syslog
"Sep 6 07:55:42 venom kernel: INFO: rcu_sched_state detected stalls on CPUs/tasks: { 7} (detected by 4, t=1322 jiffies)"
I look at the NMI backtrace for CPU 7 for the offending application and I see this "Sep 6 07:55:42 venom kernel: Pid: 0, comm: swapper Not tainted 2.6.35-gentoo-r3 #1 0XDN97/PowerEdge R610"
Is CPU 7 (core 4 on CPU2) going bad?
What else should I be looking for?
Any help would be much appreciated!
Thanks,
Carl |
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Zentoo
Apprentice
Joined: 18 Nov 2002
Posts: 206
Location: /dev/console
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| Posted: Sat Oct 16, 2010 10:09 am Post subject: kernel: INFO: rcu_sched_state detected stalls on CPUs/tasks |
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Hi !
I've the same problem since 5 days. I'm trying to find the problem and it seems related to the kernel.
I'm using:
| Code: | | Linux Zentoo-1 2.6.35-zen2 #7 ZEN SMP Fri Oct 15 00:50:37 CEST 2010 x86_64 Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz GenuineIntel GNU/Linux |
Which kernel version do you have ?
When i'm looking for the frequency of the freeze, i get this:
| Code: | grep "rcu_sched_state" /var/log/messages
Oct 10 04:38:42 Zentoo-1 kernel: INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0} (detected by 3, t=10002 jiffies)
Oct 10 04:39:09 Zentoo-1 kernel: INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0} (detected by 3, t=10003 jiffies)
Oct 10 04:39:33 Zentoo-1 kernel: INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0} (detected by 3, t=10006 jiffies)
Oct 10 04:39:55 Zentoo-1 kernel: INFO: rcu_sched_state detected stalls on CPUs/tasks: { 7} (detected by 3, t=14063 jiffies)
Oct 13 01:50:59 Zentoo-1 kernel: INFO: rcu_sched_state detected stall on CPU 7 (t=48554 jiffies)
Oct 13 01:50:59 Zentoo-1 kernel: INFO: rcu_sched_state detected stalls on CPUs/tasks: { vboxnetflt 0 vboxdrv 7 nvidia(P)} (detected by 2, t=48554 jiffies)
Oct 13 01:51:20 Zentoo-1 kernel: INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0} (detected by 7, t=20385 jiffies)
Oct 13 01:54:32 Zentoo-1 kernel: INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0} (detected by 2, t=10201 jiffies)
Oct 13 01:55:07 Zentoo-1 kernel: INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0} (detected by 5, t=11711 jiffies)
Oct 14 08:45:37 Zentoo-1 kernel: INFO: rcu_sched_state detected stalls on CPUs/tasks: { 5} (detected by 1, t=10002 jiffies)
Oct 15 11:16:08 Zentoo-1 kernel: INFO: rcu_sched_state detected stall on CPU 7 (t=25647 jiffies)
Oct 15 11:16:08 Zentoo-1 kernel: INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0 3
Oct 15 14:17:58 Zentoo-1 kernel: INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0 5} (detected by 3, t=12290 jiffies)
Oct 15 19:29:24 Zentoo-1 kernel: INFO: rcu_sched_state detected stalls on CPUs/tasks: { 7} (detected by 6, t=23494 jiffies)
Oct 15 21:35:17 Zentoo-1 kernel: INFO: rcu_sched_state detected stall on CPU 0 (t=18774 jiffies)
Oct 15 21:35:17 Zentoo-1 kernel: INFO: rcu_sched_state detected stall on CPU 4 (t=18774 jiffies)
Oct 15 21:35:17 Zentoo-1 kernel: INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0 4
Oct 15 23:28:24 Zentoo-1 kernel: INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0} (detected by 7, t=11714 jiffies)
Oct 16 06:48:52 Zentoo-1 kernel: INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0} (detected by 7, t=11720 jiffies)
Oct 16 07:08:40 Zentoo-1 kernel: INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0 5 6} (detected by 2, t=14046 jiffies)
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ACCEPT_KEYWORDS="~amd64"
USE="-systemd"
Desktop: openbox|picom|ROX-Filer|wbar|window maker dockapps
Hardware: Ryzen 7950X | 64 Gb | Nvidia 3080Ti |
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ckenda1
Tux's lil' helper
Joined: 19 Feb 2004
Posts: 126
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| Posted: Sun Oct 17, 2010 11:33 pm Post subject: |
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I was using gentoo-sources 2.6.35-r4 at the time.
I downgraded to a 2.6.34 kernel and the issue went away.
I am unsure if further revisions of gentoo-sources 2.6.35 (ie. r10) have resolved the issue. It may have, but because this is a production server, I can't take the risk right this minute with further downtime.
I currently run 2.6.34-r11. |
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