linux-kernel - Re: [RFC PATCH 0/3] Fix SLQB on memoryless configurations V2

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Date:	Tue, 22 Sep 2009 13:21:15 +0300
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	Mel Gorman <mel@....ul.ie>
Cc:	Christoph Lameter <cl@...ux-foundation.org>,
	Nick Piggin <npiggin@...e.de>, heiko.carstens@...ibm.com,
	sachinp@...ibm.com, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, Tejun Heo <tj@...nel.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: Re: [RFC PATCH 0/3] Fix SLQB on memoryless configurations V2

Hi Mel,

On Tue, 2009-09-22 at 11:05 +0100, Mel Gorman wrote:
> I'm going to punt the decision on this one to Pekka or Nick. My feeling
> is leave it enabled for NUMA so it can be identified if it gets fixed
> for some other reason - e.g. the stalls are due to a per-cpu problem as
> stated by Sachin and SLQB happens to exasperate the problem.

Can I have a tested patch that uses MAX_NUMNODES to allocate the
structs, please? We can convert SLQB over to per-cpu allocator if the
memoryless node issue is resolved.

			Pekka

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