linux-kernel - Re: [patch] cpusets: do not allow TIF

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Date:	Wed, 06 Jun 2007 10:03:17 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Paul Jackson <pj@....com>, David Rientjes <rientjes@...gle.com>,
	ak@...e.de, clameter@...ulhu.engr.sgi.com,
	linux-kernel@...r.kernel.org
Subject: Re: [patch] cpusets: do not allow TIF_MEMDIE tasks to allocate
	globally

On Wed, 2007-06-06 at 01:00 -0700, Andrew Morton wrote:
> On Wed, 6 Jun 2007 00:56:10 -0700 Paul Jackson <pj@....com> wrote:
> 
> > David wrote:
> > > That is, unless you can guarantee this type of problem will not happen again
> > 
> > Well, I certainly cannot guarantee that.
> 
> The only place I can think of where the kernel will sit there allocating
> huge amounts of memory like this is in readahead.

We just created one more, the execve string copy. However that uses
get_user_pages(), so if that gets fixed we're save there too.

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