linux-kernel - Re: [PATCH 1/1] mm: Prevent dereferencing non-allocated per

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Message-ID: <Pine.LNX.4.64.0711271513460.6349@schroedinger.engr.sgi.com>
Date:	Tue, 27 Nov 2007 15:15:00 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Andi Kleen <andi@...stfloor.org>, travis@....com, ak@...e.de,
	pageexec@...email.hu, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] mm: Prevent dereferencing non-allocated per_cpu
 variables

On Tue, 27 Nov 2007, Andrew Morton wrote:

> hm.  Has anyone any evidence that we're actually touching
> not-possible-cpu's memory here?

I saw it in acpi when the __cpu_offset() pointers become zero. I have 
never seen it in vmstat.c. We do not need the vmstat.c fix.
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