lkml.org 
[lkml]   [2007]   [Nov]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: NULL dereference in clockevents_program_event
From
Date

> During a hibernate cycle on my G5, while machine was powering down after
> saving the image, I just had a NULL dereference in
> clockevents_program_event when accessing dev->mode, dev was NULL.
>
> Unfortunately the machine rebooted before I was able to write down more
> than the fact that it was called from tick_program_event(); the problem
> doesn't seem to be easily reproducible.
>
> From what I can see when doing the same thing, the shutdown attempts to
> offline all CPUs. Because the snapshot was actually saved to disk and
> the machine was shutting down I guess that the it happened at that time,
> but I have no idea what else to do to debug this.
>
> I have
>
> | CONFIG_HIGH_RES_TIMERS=y
> | CONFIG_NO_HZ=y
>
> in this config.

I just got the same or a similar thing again and was able to write down
more of the stack dump:

NIP clock_events_program_event+0x20
LR tick_program_event+0x64
Stack:
hr_timer_interrupt+0x211
timer_interrupt+0xc4
decrementer_common+0x110

johannes
[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2007-11-28 14:29    [W:1.021 / U:0.292 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site