linux-kernel - Re: [GIT PULL] kmemcheck for mainline

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Message-ID: <20090612140046.GI32105@elte.hu>
Date:	Fri, 12 Jun 2009 16:00:46 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Pekka Enberg <penberg@...helsinki.fi>
Cc:	Vegard Nossum <vegard.nossum@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] kmemcheck for mainline


* Pekka Enberg <penberg@...helsinki.fi> wrote:

> Hi Linus,
> 
> On Fri, Jun 12, 2009 at 4:31 PM, Vegard Nossum<vegard.nossum@...il.com> wrote:
> > Please consider pulling the kmemcheck tree;
> >
> > kmemcheck is a feature which can (at run-time) detect some uses of
> > uninitialized memory within the kernel, similarly to what Valgrind's memcheck
> > does for userspace programs. We also have the ability to find use-after-free
> > errors and leaks of uninitialized data to userspace, both with a false-
> > positive rate of zero.
> >
> > kmemcheck is self-contained in the sense that when CONFIG_KMEMCHECK=n, it has
> > no effect on the compiled kernel whatsoever. Our code has lived in the -tip
> > tree and been in -next for over a year, and has the acks of x86 and slab
> > maintainers (Ingo and Pekka). Inclusion in mainline would lower the threshold
> > for building and running kmemcheck-enabled kernels, which would also
> > hopefully increase testing coverage of the rest of the kernel code.
> 
> I hope I didn't burn all my karma for this merge window with the slab
> early boot patches but:
> 
> Acked-by: Pekka Enberg <penberg@...helsinki.fi>
> 
> for this pull request.

+1

I've been testing kmemcheck in -tip for 1.5 years meanwhile and in 
terms of maintenance overhead it was never troublesome to have 
around.

	Ingo
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