linux-kernel - Re: [PATCH] kmemcheck: lazy checking for MOVS instructions

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Date:	Fri, 12 Sep 2008 11:06:07 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Vegard Nossum <vegard.nossum@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Pekka Enberg <penberg@...helsinki.fi>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] kmemcheck: lazy checking for MOVS instructions


* Vegard Nossum <vegard.nossum@...il.com> wrote:

> Comments, anyone?
> 
> >From 36190b27a77b8ff5bbea09cf765c1f335c3920e4 Mon Sep 17 00:00:00 2001
> From: Vegard Nossum <vegard.nossum@...il.com>
> Date: Thu, 11 Sep 2008 17:31:07 +0200
> Subject: [PATCH] kmemcheck: lazy checking for MOVS instructions
> 
> This patch adds the support for lazy (as opposed to eager) checking 
> for [REP] MOVS instructions (mostly used in memcpy()). This means that 
> if both the source and destination addresses are tracked by kmemcheck, 
> we copy the shadow memory instead of checking that it is initialized.
> 
> In this way, we get rid of a few more false positives.

looks good to me. I've applied it to tip/kmemcheck - but can zap it and 
pull your for-tip branch as well.

	Ingo
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