linux-kernel - Re: kmemleak, cpu usage jump out of nowhere

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Date:	Thu, 15 Jul 2010 15:58:11 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	Pekka Enberg <penberg@...helsinki.fi>
Cc:	Zeno Davatz <zdavatz@...il.com>, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: kmemleak, cpu usage jump out of nowhere

On Wed, 2010-07-14 at 10:55 +0100, Pekka Enberg wrote:
> Catalin Marinas wrote:
> > On Wed, 2010-07-14 at 09:27 +0100, Zeno Davatz wrote:
> >> On Wed, Jul 14, 2010 at 10:05 AM, Pekka Enberg <penberg@...helsinki.fi> wrote:
> >>> On Wed, Jul 14, 2010 at 9:12 AM, Zeno Davatz <zdavatz@...il.com> wrote:
> >
> >>>> I am attaching you the file from /sys/kernel/debug/kmemleak
> >>> Zeno, can you post your dmesg and .config, please?
> >> Sure, see attached files.
> >
> > It looks like NO_BOOTMEM is enabled. You can try the attached patch (I
> > need to post it again on the list).
> >
> >
> > kmemleak: Add support for NO_BOOTMEM configurations
> >
> > From: Catalin Marinas <catalin.marinas@....com>
> >
> > With commits 08677214 and 59be5a8e, alloc_bootmem()/free_bootmem() and
> > friends use the early_res functions for memory management when
> > NO_BOOTMEM is enabled. This patch adds the kmemleak calls in the
> > corresponding code paths for bootmem allocations.
> >
> > Signed-off-by: Catalin Marinas <catalin.marinas@....com>
> > Cc: Yinghai Lu <yinghai@...nel.org>
> > Cc: H. Peter Anvin <hpa@...or.com>
> 
> Makes sense.
> 
> Acked-by: Pekka Enberg <penberg@...helsinki.fi>

I'll post an updated patch since I missed a callback. I've been testing
it since yesterday and seems ok.

Thanks.

-- 
Catalin

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