linux-kernel - Re: [PATCH 14/14] mm,migration: Allow the migration of PageSwapCache pages

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Message-Id: <20100406155443.31053365.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Tue, 6 Apr 2010 15:54:43 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Mel Gorman <mel@....ul.ie>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	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>,
	Minchan Kim <minchan.kim@...il.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Rik van Riel <riel@...hat.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [PATCH 14/14] mm,migration: Allow the migration of
 PageSwapCache pages

On Fri,  2 Apr 2010 17:02:48 +0100
Mel Gorman <mel@....ul.ie> wrote:

> PageAnon pages that are unmapped may or may not have an anon_vma so are
> not currently migrated. However, a swap cache page can be migrated and
> fits this description. This patch identifies page swap caches and allows
> them to be migrated but ensures that no attempt to made to remap the pages
> would would potentially try to access an already freed anon_vma.
> 
> Signed-off-by: Mel Gorman <mel@....ul.ie>

Seems nice to me.

Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

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