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Date: Tue, 24 Aug 2010 12:15:36 +0300
From: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
To: Tejun Heo <tj@kernel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
        Andrew Morton <akpm@linux-foundation.org>, Ingo Molnar <mingo@elte.hu>,
        "H. Peter Anvin" <hpa@zytor.com>, linux-kernel@vger.kernel.org
Subject: Re: general protection fault: 0000 [#1] PREEMPT SMP
Message-ID: <20100824091536.GA5440@swordfish.minsk.epam.com>
References: <20100813134756.GA5235@swordfish.minsk.epam.com>
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On (08/24/10 10:58), Tejun Heo wrote:
> Hello,
>=20
> 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+0x3=
e/0x93
>=20
> 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.
>=20
> Thanks.
>=20
> --=20
> tejun
>=20

Hello,

Can't reproduce it so far.

	Sergey

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