linux-kernel - Re: Page alloc problems with 2.6.32-rc kernels

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Date:	Wed, 4 Nov 2009 01:14:07 +0100
From:	Frans Pop <elendil@...net.nl>
To:	Michael Guntsche <mike@...loops.com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Mel Gorman <mel@....ul.ie>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: Page alloc problems with 2.6.32-rc kernels

Adding a few more CCs.

On Monday 02 November 2009, Michael Guntsche wrote:
> > I have the server running with all with patches applied and it runs
> > without any issues. Since adding patch5 seems to make a difference I
> > will revert 1-4 and only apply patch 5 to see if it work too. I will
> > report back as soon as I have news.
>
> Current status of my tests here. With only patch 5 applied (the revert)
> I am not able to reproduce the problem. Reading through the ml archives
> I noticed that this revert is somewhat controversial since it seems to
> fix other bugs. Is it possible that reverting those fixes just hide the
> bug I am seeing instead of fixing it?

Thanks Michael. That means we now have two cases where reverting the 
congestion_wait() changes from .31-rc3 (8aa7e847d8 + 373c0a7ed3) makes a 
clear and significant difference.

I wonder if more effort could/should be made on this aspect.

Cheers,
FJP
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