Messages in this thread | | | Subject | Re: NULL dereference in clockevents_program_event | From | Johannes Berg <> | Date | Wed, 28 Nov 2007 00:52:20 +0100 |
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> 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]
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