linux-kernel - Re: [patch 3.5-rc3] mm, mempolicy: fix mbind() to do synchronous migration

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Message-ID: <20120621124235.GN4011@suse.de>
Date:	Thu, 21 Jun 2012 13:42:35 +0100
From:	Mel Gorman <mgorman@...e.de>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [patch 3.5-rc3] mm, mempolicy: fix mbind() to do synchronous
 migration

On Wed, Jun 20, 2012 at 06:00:12PM -0700, David Rientjes wrote:
> If the range passed to mbind() is not allocated on nodes set in the
> nodemask, it migrates the pages to respect the constraint.
> 
> The final formal of migrate_pages() is a mode of type enum migrate_mode,
> not a boolean.  do_mbind() is currently passing "true" which is the
> equivalent of MIGRATE_SYNC_LIGHT.  This should instead be MIGRATE_SYNC
> for synchronous page migration.
> 
> Signed-off-by: David Rientjes <rientjes@...gle.com>

Acked-by: Mel Gorman <mgorman@...e.de>

-- 
Mel Gorman
SUSE Labs
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