linux-kernel - Re: [PATCH 0/8] Use memory compaction instead of lumpy reclaim during high-order allocations

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Message-Id: <4B8266CB-F658-4CC8-BCA3-677C22BAFAE0@mit.edu>
Date:	Fri, 19 Nov 2010 07:43:02 -0500
From:	Theodore Tso <tytso@....EDU>
To:	Mel Gorman <mel@....ul.ie>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Johannes Weiner <hannes@...xchg.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Rik van Riel <riel@...hat.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/8] Use memory compaction instead of lumpy reclaim during high-order allocations


On Nov 19, 2010, at 5:48 AM, Mel Gorman wrote:

> At least as long as !CONFIG_COMPACTION exists. That will be a while because
> bear in mind CONFIG_COMPACTION is disabled by default (although I believe
> some distros are enabling it at least). Maybe we should choose to deprecate
> it in 2.6.40 and delete it at the infamous time of 2.6.42? That would give
> ample time to iron out any issues that crop up with reclaim/compaction
> (what this series has turned into).

How about making the default before 2.6.40, as an initial step?

-Ted
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