linux-kernel - Re: [patch] mm, compaction: determine isolation mode only once

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Date:	Fri, 07 Mar 2014 07:27:38 -0500
From:	Rik van Riel <riel@...hat.com>
To:	David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>
CC:	Mel Gorman <mgorman@...e.de>, Vlastimil Babka <vbabka@...e.cz>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [patch] mm, compaction: determine isolation mode only once

On 03/07/2014 07:01 AM, David Rientjes wrote:
> The conditions that control the isolation mode in 
> isolate_migratepages_range() do not change during the iteration, so 
> extract them out and only define the value once.
> 
> This actually does have an effect, gcc doesn't optimize it itself because 
> of cc->sync.
> 
> Signed-off-by: David Rientjes <rientjes@...gle.com>

Acked-by: Rik van Riel <riel@...hat.com>

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