linux-kernel - Re: [block IO crash] Re: 2.6.39-rc5-git2 boot crashs

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Message-ID: <BANLkTikKZhqkcrG8aqUD0tJxZE5zVu0pMg@mail.gmail.com>
Date:	Wed, 4 May 2011 15:51:14 +0300
From:	Pekka Enberg <penberg@...nel.org>
To:	Tejun Heo <tj@...nel.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jens Axboe <axboe@...nel.dk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	werner <w.landgraf@...ru>, "H. Peter Anvin" <hpa@...or.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Christoph Lameter <cl@...ux.com>
Subject: Re: [block IO crash] Re: 2.6.39-rc5-git2 boot crashs

Hi Tejun,

On Wed, May 4, 2011 at 2:27 PM, Tejun Heo <tj@...nel.org> wrote:
> Hmmm... if it's a race caused by preemtion enabled where it shouldn't
> be, it's most likely the wrong type of this_cpu_cmpxchg_double() being
> used in SLUB?  ie. __this_cpu_cmpxchg_double() where it should have
> been this_cpu_cmpxchg_double()?  Christoph?

There's no __this_cpu_cmpxchg_double() usage in mm/slub.c so I don't
think it's that simple.
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