linux-kernel - Re: [PATCH] profile: Suppress warning about large allocations when profile=1 is specified

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Date:	Sat, 20 Jun 2009 20:50:00 +0100
From:	Mel Gorman <mel@....ul.ie>
To:	linux-kernel@...r.kernel.org
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Catalin Marinas <catalin.marinas@....com>,
	torvalds@...ux-foundation.org, fengguang.wu@...el.com,
	Pekka Enberg <penberg@...helsinki.fi>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH] profile: Suppress warning about large allocations when
	profile=1 is specified

On Sat, Jun 20, 2009 at 12:09:32PM +0200, Heinz Diehl wrote:
> On 17.06.2009, Mel Gorman wrote: 
> 
> > Patch as follows
> [....]
> 
> With 2.6.30-git14, I get this early in the boot process. 
> Don't know if it's related to this thread. In any case, your patch does not fix it:
> 

It's sortof related in that it's another source of NOFAIL high-order
allocations.

> [....]
> WARNING: at mm/page_alloc.c:1744 level2_spare_pgt+0x8f70a/0x36c800()
> Hardware name:  
> Modules linked in:
> Pid: 1, comm: swapper Not tainted 2.6.30-git14 #1

I can't figure out from this trace where the problem is coming from. Can
you post your .config and the full dmesg please?

> Call Trace:
>  [<ffffffff8109770a>] ? level2_spare_pgt+0x8f70a/0x36c800
>  [<ffffffff8109770a>] ? level2_spare_pgt+0x8f70a/0x36c800
>  [<ffffffff81044a19>] ? level2_spare_pgt+0x3ca19/0x36c800
>  [<ffffffff8109770a>] ? level2_spare_pgt+0x8f70a/0x36c800
>  [<ffffffff810463f2>] ? level2_spare_pgt+0x3e3f2/0x36c800
>  [<ffffffff810bf8bb>] ? level2_spare_pgt+0xb78bb/0x36c800
>  [<ffffffff81096829>] ? level2_spare_pgt+0x8e829/0x36c800
>  [<ffffffff815281a2>] ? __smp_locks_end+0x33a4a/0x35773
>  [<ffffffff815280b0>] ? __smp_locks_end+0x33958/0x35773
>  [<ffffffff8100904b>] ? level2_spare_pgt+0x104b/0x36c800
>  [<ffffffff81119808>] ? level2_spare_pgt+0x111808/0x36c800
>  [<ffffffff81084df1>] ? level2_spare_pgt+0x7cdf1/0x36c800
>  [<ffffffff814f5665>] ? __smp_locks_end+0xf0d/0x35773
>  [<ffffffff8100ce0a>] ? level2_spare_pgt+0x4e0a/0x36c800
>  [<ffffffff814f54e9>] ? __smp_locks_end+0xd91/0x35773
>  [<ffffffff8100ce00>] ? level2_spare_pgt+0x4e00/0x36c800
> ---[ end trace 692ffa03e0502250 ]---
> CCID: Activated CCID 2 (TCP-like)
> registered taskstats version 1
> Freeing unused kernel memory: 572k freed
> [....]
> 
> Regards,
> Heinz.
> 

-- 
Mel Gorman
Part-time Phd Student                          Linux Technology Center
University of Limerick                         IBM Dublin Software Lab
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