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Date:	Mon, 20 Jan 2014 15:12:02 +0900
From:	Minchan Kim <minchan@...nel.org>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Xishi Qiu <qiuxishi@...wei.com>, riel@...hat.com,
	aquini@...hat.com, linux-mm@...ck.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm: Improve documentation of page_order

On Fri, Jan 17, 2014 at 02:32:21PM +0000, Mel Gorman wrote:
> Developers occasionally try and optimise PFN scanners by using page_order
> but miss that in general it requires zone->lock. This has happened twice for
> compaction.c and rejected both times.  This patch clarifies the documentation
> of page_order and adds a note to compaction.c why page_order is not used.
> 
> Signed-off-by: Mel Gorman <mgorman@...e.de>

Except Laura pointed out,

Acked-by: Minchan Kim <minchan@...nel.org>

Thanks for following up this issue without forgetting.
-- 
Kind regards,
Minchan Kim
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