linux-kernel - Re: Major slab mem leak with 2.6.17 / GCC 4.1.1

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Message-Id: <1160727912.15431.11.camel@Homer.simpson.net>
Date:	Fri, 13 Oct 2006 08:25:12 +0000
From:	Mike Galbraith <efault@....de>
To:	nmeyers@...tmark.com
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Major slab mem leak with 2.6.17 / GCC 4.1.1

On Thu, 2006-10-12 at 20:49 -0400, nmeyers@...tmark.com wrote:

> I tried Catalin Marinas' kmemleak patches, and had to rebuild with
> GCC 3.4.6 because of a 4.1.1 compiler bug that prevents compilation
> of the patches.

Yeah, seems any remotely recent gcc hates it.  That puts a rather large
dent in usability.

> And... building with 3.4.5 fixed the leak! So I guess I have very little
> detail to report - except that there's a nasty leak in 2.6.17 when built
> with 4.1.1.

If you build using 3.4.5 _without_ the kmemleak patches, do you see the
leak again?  (ie is kmemleak altering timing, or is kernel miscompiled)

> If anyone has a version of kmemleak that I can build with 4.1.1, or
> any other suggestions for instrumentation, I'd be happy to gather more
> data - the problem is very easy for me to reproduce.

I can only suggest trying latest/greatest to see if the issue is still
present, and if so, try to find a way that others may trigger it.

	-Mike

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