Re: [PATCH] kmemcheck: lazy checking for MOVS instructions

From: Ingo Molnar
Date: Fri Sep 12 2008 - 05:06:32 EST

* Vegard Nossum <vegard.nossum@xxxxxxxxx> wrote:

> Comments, anyone?
> >From 36190b27a77b8ff5bbea09cf765c1f335c3920e4 Mon Sep 17 00:00:00 2001
> From: Vegard Nossum <vegard.nossum@xxxxxxxxx>
> 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.

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