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Date: Thu, 9 Sep 2010 12:15:47 +0900
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Subject: Re: [PATCH 05/10] vmscan: Synchrounous lumpy reclaim use
 lock_page() instead trylock_page()
Message-Id: <20100909121547.2e69735a.kamezawa.hiroyu@jp.fujitsu.com>
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To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Linux Kernel List <linux-kernel@vger.kernel.org>, Rik van Riel <riel@redhat.com>, Johannes Weiner <hannes@cmpxchg.org>, Minchan Kim <minchan.kim@gmail.com>, Wu Fengguang <fengguang.wu@intel.com>, Andrea Arcangeli <aarcange@redhat.com>, KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>, Dave Chinner <david@fromorbit.com>, Chris Mason <chris.mason@oracle.com>, Christoph Hellwig <hch@lst.de>, Andrew Morton <akpm@linux-foundation.org>
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On Thu, 9 Sep 2010 12:04:48 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:

> On Mon,  6 Sep 2010 11:47:28 +0100
> Mel Gorman <mel@csn.ul.ie> wrote:
> 
> > From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
> > 
> > With synchrounous lumpy reclaim, there is no reason to give up to reclaim
> > pages even if page is locked. This patch uses lock_page() instead of
> > trylock_page() in this case.
> > 
> > Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
> > Signed-off-by: Mel Gorman <mel@csn.ul.ie>
> 
> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
> 
Ah......but can't this change cause dead lock ??

Thanks,
-Kame

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