Re: general protection fault: 0000 [#1] PREEMPT SMP

Sergey Senozhatsky
2010-08-24T09:15:52Z

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On (08/24/10 10:58), Tejun Heo wrote:
> Hello,
>
> On 08/13/2010 03:47 PM, Sergey Senozhatsky wrote:
> > [ 29.943019] [<ffffffff81065893>] lock_acquire+0x97/0xb6
> ..
> > [ 29.943257] [<ffffffff8137568d>] _raw_spin_lock_irqsave+0x4e/0x60
> ..
> > [ 29.943376] [<ffffffff8137145b>] percpu_counter_hotcpu_callback+0x3e/0x93
>
> It's getting gpf at spin_lock_irqsave(&fbc->lock) in
> percpu_counter_hotplug_callback(). percpu_counter keeps track of all
> the allocated percpu counters and walk them on cpu up/down events.
> It's most likely one of its users freed or corrupted the percpu
> counter structure without properly destroying it. Adding debugobj is
> probably the best way to track down the offending user.
>
> Thanks.
>
> --
> tejun
>

Hello,

Can't reproduce it so far.

Sergey

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