linux-kernel - Re: [PATCH 1/7] Allow CONFIG_MIGRATION to be set without CONFIG

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Message-ID: <alpine.DEB.2.00.1001071603260.6864@router.home>
Date:	Thu, 7 Jan 2010 16:04:00 -0600 (CST)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	David Rientjes <rientjes@...gle.com>
cc:	Mel Gorman <mel@....ul.ie>, Andrea Arcangeli <aarcange@...hat.com>,
	Adam Litke <agl@...ibm.com>, Avi Kivity <avi@...hat.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 1/7] Allow CONFIG_MIGRATION to be set without
 CONFIG_NUMA


On Thu, 7 Jan 2010, David Rientjes wrote:

> CONFIG_MIGRATION is no longer strictly dependent on CONFIG_NUMA since
> ARCH_ENABLE_MEMORY_HOTREMOVE has allowed it to be configured for UMA
> machines.  All strictly NUMA features in the migration core should be
> isolated under its #ifdef CONFIG_NUMA (sys_move_pages()) in mm/migrate.c
> or by simply not compiling mm/mempolicy.c (sys_migrate_pages()), so this
> patch looks fine as is (although the "help" text for CONFIG_MIGRATION
> could be updated to reflect that it's useful for both memory hot-remove
> and now compaction).

Correct.

Reviewed-by: Christoph Lameter <cl@...ux-foundation.org>
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