linux-kernel - Re: [PATCH v3 0/4] memory-hotplug: handle page race between allocation and isolation

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Date:	Fri, 7 Sep 2012 10:17:01 +0100
From:	Mel Gorman <mgorman@...e.de>
To:	Minchan Kim <minchan@...nel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>,
	Xishi Qiu <qiuxishi@...wei.com>,
	Wen Congyang <wency@...fujitsu.com>
Subject: Re: [PATCH v3 0/4] memory-hotplug: handle page race between
 allocation and isolation

On Fri, Sep 07, 2012 at 09:39:28AM +0900, Minchan Kim wrote:
> Memory hotplug has a subtle race problem so this patchset fixes the problem
> (Look at [3/3] for detail and please confirm the problem before review
> other patches in this series.)
> 
>  [1/4] is just clean up and help for [2/4].
>  [2/4] keeps the migratetype information to freed page's index field
>        and [3/4] uses the information.
>  [3/4] fixes the race problem with [2/4]'s information.
>  [4/4] enhance memory-hotremove operation success ratio
> 
> After applying [2/4], migratetype argument in __free_one_page
> and free_one_page is redundant so we can remove it but I decide
> to not touch them because it increases code size about 50 byte.
> 
> This patchset is based on mmotm-2012-09-06-16-46
> 

Nothing jumped out and poked me in the eye so for the series;

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

Thanks!

-- 
Mel Gorman
SUSE Labs
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