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

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Message-ID: <Pine.LNX.4.64.0706011217510.3406@schroedinger.engr.sgi.com>
Date:	Fri, 1 Jun 2007 12:18:26 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Paul Jackson <pj@....com>
cc:	srinivasa@...ibm.com, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, torvalds@...ux-foundation.org,
	vatsa@...ibm.com, dino@...ibm.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, Paul Jackson wrote:

> What do you mean, Christoph, by "then any dereferences will fail" ?
> That sounds bad to me -- we don't want pointer dereferences failing
> in the kernel, do we?  Wouldn't you have to add some more lines of
> code, a bit further down, where pidarray is used, to avoid trying to
> use it if its NULL?

The allocated array has 0 bytes. Any dereference is an error.
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