linux-kernel - Re: [PATCH 02/12] Allow CONFIG_MIGRATION to be set without CONFIG

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Date:	Tue, 16 Feb 2010 12:43:08 -0500
From:	Rik van Riel <riel@...hat.com>
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 02/12] Allow CONFIG_MIGRATION to be set without CONFIG_NUMA
 or memory hot-remove

On 02/12/2010 07:00 AM, Mel Gorman wrote:
> CONFIG_MIGRATION currently depends on CONFIG_NUMA or on the architecture
> being able to hot-remove memory. The main users of page migration such as
> sys_move_pages(), sys_migrate_pages() and cpuset process migration are
> only beneficial on NUMA so it makes sense.
>
> As memory compaction will operate within a zone and is useful on both NUMA
> and non-NUMA systems, this patch allows CONFIG_MIGRATION to be set if the
> user selects CONFIG_COMPACTION as an option.
>
> Signed-off-by: Mel Gorman<mel@....ul.ie>
> Reviewed-by: Christoph Lameter<cl@...ux-foundation.org>

Reviewed-by: Rik van Riel <riel@...hat.com>

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