linux-kernel - Re: list corruption in the last few days. (block ? crypto ?)

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Date:	Mon, 8 Aug 2011 09:58:18 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Pekka Enberg <penberg@...nel.org>
cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Dave Jones <davej@...hat.com>,
	Markus Trippelsdorf <markus@...ppelsdorf.de>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jens Axboe <jaxboe@...ionio.com>
Subject: Re: list corruption in the last few days. (block ? crypto ?)

On Sun, 7 Aug 2011, Pekka Enberg wrote:

> Christoph, I've been reading the code and spotted two potential issues in
> __slab_free(). The first one seems like an off-by-one where our comparison in
> deactivate_slab() doesn't match __slab_free.

Would not cause list corruption.

> The other one is remove_full() call in __slab_free() that can get called even
> if cache debugging is not enabled.

The checks for the debug flag are already done in remove_full().
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