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Date: Thu, 9 Sep 2010 12:17:59 +0900
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To: Mel Gorman <mel@....ul.ie>
Cc: linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
Linux Kernel List <linux-kernel@...r.kernel.org>,
Rik van Riel <riel@...hat.com>,
Johannes Weiner <hannes@...xchg.org>,
Minchan Kim <minchan.kim@...il.com>,
Wu Fengguang <fengguang.wu@...el.com>,
Andrea Arcangeli <aarcange@...hat.com>,
KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
Dave Chinner <david@...morbit.com>,
Chris Mason <chris.mason@...cle.com>,
Christoph Hellwig <hch@....de>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 08/10] vmscan: isolated_lru_pages() stop neighbour
search if neighbour cannot be isolated
On Mon, 6 Sep 2010 11:47:31 +0100
Mel Gorman <mel@....ul.ie> wrote:
> From: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
>
> isolate_lru_pages() does not just isolate LRU tail pages, but also isolate
> neighbour pages of the eviction page. The neighbour search does not stop even
> if neighbours cannot be isolated which is excessive as the lumpy reclaim will
> no longer result in a successful higher order allocation. This patch stops
> the PFN neighbour pages if an isolation fails and moves on to the next block.
>
> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
> Signed-off-by: Mel Gorman <mel@....ul.ie>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
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