linux-kernel - Re: [RFC] [PATCH] cpuset operations causes Badness at mm/slab.c:777 warning

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Message-ID: <Pine.LNX.4.64.0706011519030.7625@schroedinger.engr.sgi.com>
Date:	Fri, 1 Jun 2007 15:20:05 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Jeremy Fitzhardinge <jeremy@...p.org>,
	Srinivasa Ds <srinivasa@...ibm.com>,
	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Srivatsa Vaddagiri <vatsa@...ibm.com>,
	Dinakar Guniguntala <dino@...ibm.com>, pj@....com,
	simon.derr@...l.net, clameter@...ulhu.engr.sgi.com,
	rientjes@...gle.com
Subject: Re: [RFC] [PATCH] cpuset operations causes Badness at mm/slab.c:777
 warning

On Fri, 1 Jun 2007, Andrew Morton wrote:

> If slab was smart enough, it would have poisoned those 8 bytes to some
> known pattern, and then checked that they still had that pattern when the
> memory got freed again.

So this is new feature request?

> But it isn't smart enough, so the bug went undetected.

I should make SLUB put poisoning values in unused areas of a kmalloced 
object?

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