linux-kernel - Re: The performance and behaviour of the anti-fragmentation related patches

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Message-Id: <20070302093501.34c6ef2a.akpm@linux-foundation.org>
Date:	Fri, 2 Mar 2007 09:35:01 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Christoph Lameter <clameter@...r.sgi.com>
Cc:	Rik van Riel <riel@...hat.com>, Mel Gorman <mel@...net.ie>,
	npiggin@...e.de, mingo@...e.hu, jschopp@...tin.ibm.com,
	arjan@...radead.org, torvalds@...ux-foundation.org,
	mbligh@...igh.org, linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: The performance and behaviour of the anti-fragmentation related
 patches

On Fri, 2 Mar 2007 09:23:49 -0800 (PST) Christoph Lameter <clameter@...r.sgi.com> wrote:

> On Fri, 2 Mar 2007, Andrew Morton wrote:
> 
> > > Linux is *not* happy on 256GB systems.  Even on some 32GB systems
> > > the swappiness setting *needs* to be tweaked before Linux will even
> > > run in a reasonable way.
> > 
> > Please send testcases.
> 
> It is not happy if you put 256GB into one zone.

Oh come on.  What's the workload?  What happens?  system time?  user time?
kernel profiles?
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