linux-kernel - Re: [PATCH 06/11] mm: compaction: make isolate_lru

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Message-ID: <20111218015314.GA13069@barrios-laptop.redhat.com>
Date:	Sun, 18 Dec 2011 10:53:14 +0900
From:	Minchan Kim <minchan@...nel.org>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Minchan Kim <minchan.kim@...il.com>,
	Dave Jones <davej@...hat.com>, Jan Kara <jack@...e.cz>,
	Andy Isaacson <adi@...apodia.org>,
	Johannes Weiner <jweiner@...hat.com>,
	Rik van Riel <riel@...hat.com>, Nai Xia <nai.xia@...il.com>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 06/11] mm: compaction: make isolate_lru_page()
 filter-aware again

On Wed, Dec 14, 2011 at 03:41:28PM +0000, Mel Gorman wrote:
> Commit [39deaf85: mm: compaction: make isolate_lru_page() filter-aware]
> noted that compaction does not migrate dirty or writeback pages and
> that is was meaningless to pick the page and re-add it to the LRU list.
> This had to be partially reverted because some dirty pages can be
> migrated by compaction without blocking.
> 
> This patch updates "mm: compaction: make isolate_lru_page" by skipping
> over pages that migration has no possibility of migrating to minimise
> LRU disruption.
> 
> Signed-off-by: Mel Gorman <mgorman@...e.de>
Reviewed-by: Minchan Kim <minchan@...nel.org>

-- 
Kind regards,
Minchan Kim
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