linux-kernel - Re: [PATCH 06/12] Add /proc trigger for memory compaction

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Date:	Fri, 12 Feb 2010 13:34:40 -0500
From:	Valdis.Kletnieks@...edu
To:	Mel Gorman <mel@....ul.ie>
Cc:	Andrea Arcangeli <aarcange@...hat.com>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Adam Litke <agl@...ibm.com>, Avi Kivity <avi@...hat.com>,
	David Rientjes <rientjes@...gle.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 06/12] Add /proc trigger for memory compaction

On Fri, 12 Feb 2010 12:00:53 GMT, Mel Gorman said:
> This patch adds a proc file /proc/sys/vm/compact_memory. When an arbitrary
> value is written to the file, all zones are compacted. The expected user
> of such a trigger is a job scheduler that prepares the system before the
> target application runs.

Argh. A global trigger in /proc, and a per-node trigger in /sys too.  Can we
get by with just one or the other?  Should the /proc one live in /sys too?


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