From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jamie Lokier <jamie@shareable.org>
Subject: Re: [patch 10/21] buffer heads: Support slab defrag
Date: Tue, 20 May 2008 23:53:41 +0100
Message-ID: <20080520225341.GH27853@shareable.org>
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Cc: Christoph Lameter <clameter@sgi.com>, akpm@linux-foundation.org,
	linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	Mel Gorman <mel@skynet.ie>, andi@firstfloor.org,
	Rik van Riel <riel@redhat.com>,
	Pekka Enberg <penberg@cs.helsinki.fi>, mpm@selenic.com
To: David Chinner <dgc@sgi.com>
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David Chinner wrote:
> > Why are we out of memory?
> 
> Defragmentation is triggered as part of the usual memory reclaim
> process. Which implies we've run out of free memory, correct?

I don't think that's true on no-MMU.  Defragmentation can be needed
often on no-MMU when there's lots of free memory, just in the wrong
places.

-- Jamie