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SubjectBUG: soft lockup detected on CPU#1, ipmi_si
Hi,

On 2.6.17-rc6 I get these soft lockup warnings quite regularly on one of
my DL145-G2 systems (dual dual-core (opteron 275), x86_64).

Here's an example of one:

Jun 14 00:57:55 laura kernel: [97133.246571] BUG: soft lockup detected on CPU#1!
Jun 14 00:57:55 laura kernel: [97133.247456]
Jun 14 00:57:55 laura kernel: [97133.247457] Call Trace: <IRQ> <ffffffff802a6eba>{softlockup_tick+250}
Jun 14 00:57:55 laura kernel: [97133.247496] <ffffffff80293bb7>{update_process_times+87} <ffffffff80279923>{smp_local_timer_interrupt+35}
Jun 14 00:57:55 laura kernel: [97133.247546] <ffffffff80279e61>{smp_apic_timer_interrupt+65} <ffffffff8026712e>{apic_timer_interrupt+98} <EOI>
Jun 14 00:57:55 laura kernel: [97133.247599] <ffffffff802526c3>{try_to_del_timer_sync+83} <ffffffff8026be38>{_spin_unlock_irqrestore+8}
Jun 14 00:57:55 laura kernel: [97133.247652] <ffffffff880eab78>{:ipmi_si:ipmi_thread+72} <ffffffff880eab30>{:ipmi_si:ipmi_thread+0}
Jun 14 00:57:55 laura kernel: [97133.247707] <ffffffff80237099>{kthread+217} <ffffffff8026743a>{child_rip+8}
Jun 14 00:57:55 laura kernel: [97133.247757] <ffffffff8029d280>{keventd_create_kthread+0} <ffffffff80236fc0>{kthread+0}
Jun 14 00:57:55 laura kernel: [97133.247807] <ffffffff80267432>{child_rip+0}

I have several more, all of which include ipmi_si in one way or
another. Usually these lockups happened on CPUs 2 and 3, tho today I
got one of CPU 1.

It's interesting to note that these logs are happening every 30 minutes
(munin queries 'openipmi -I open sensors' about once every 5 minutes).

Jun 12 18:45:40 laura kernel: [ 2876.040688] BUG: soft lockup detected on CPU#2!
Jun 12 19:15:54 laura kernel: [ 4688.141966] BUG: soft lockup detected on CPU#2!
Jun 12 19:46:06 laura kernel: [ 6499.159958] BUG: soft lockup detected on CPU#3!
Jun 12 20:16:17 laura kernel: [ 8309.394462] BUG: soft lockup detected on CPU#2!
Jun 12 20:46:29 laura kernel: [10120.468415] BUG: soft lockup detected on CPU#3!
Jun 12 21:16:42 laura kernel: [11931.614321] BUG: soft lockup detected on CPU#2!
Jun 12 21:46:54 laura kernel: [13742.672285] BUG: soft lockup detected on CPU#2!
[rebooted in between]
Jun 14 00:57:55 laura kernel: [97133.246571] BUG: soft lockup detected on CPU#1!
Jun 14 01:28:07 laura kernel: [98944.316467] BUG: soft lockup detected on CPU#3!

Not having the ipmi_si module loaded means these warnings don't happen.

I suspect this started happening when I upgraded the firmware of the
iLo 100i BMC from 1.00 to version 1.23 (the other system's firmware
wasn't upgraded yet). I'm still reporting it here on the chance that it
actually is a kernel/ipmi_si module bug.

Cheers,
Peter
--
| .''`. ** Debian GNU/Linux **
Peter Palfrader | : :' : The universal
http://www.palfrader.org/ | `. `' Operating System
| `- http://www.debian.org/
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