linux-kernel - Re: [PATCH 7/8] mm: vmscan: Immediately reclaim end-of-LRU dirty pages when writeback completes

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Date:	Wed, 3 Aug 2011 14:57:39 +0100
From:	Mel Gorman <mgorman@...e.de>
To:	Johannes Weiner <jweiner@...hat.com>
Cc:	Linux-MM <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>,
	XFS <xfs@....sgi.com>, Dave Chinner <david@...morbit.com>,
	Christoph Hellwig <hch@...radead.org>,
	Wu Fengguang <fengguang.wu@...el.com>, Jan Kara <jack@...e.cz>,
	Rik van Riel <riel@...hat.com>,
	Minchan Kim <minchan.kim@...il.com>
Subject: Re: [PATCH 7/8] mm: vmscan: Immediately reclaim end-of-LRU dirty
 pages when writeback completes

On Wed, Aug 03, 2011 at 01:26:30PM +0200, Johannes Weiner wrote:
> On Thu, Jul 21, 2011 at 05:28:49PM +0100, Mel Gorman wrote:
> > When direct reclaim encounters a dirty page, it gets recycled around
> > the LRU for another cycle. This patch marks the page PageReclaim
> > similar to deactivate_page() so that the page gets reclaimed almost
> > immediately after the page gets cleaned. This is to avoid reclaiming
> > clean pages that are younger than a dirty page encountered at the
> > end of the LRU that might have been something like a use-once page.
> > 
> > Signed-off-by: Mel Gorman <mgorman@...e.de>
> 
> Apart from the naming of the counter (I like nr_reclaim_preferred),
> 

At the moment it's NR_VMSCAN_IMMEDIATE and the name visible in
/proc/vmstat is nr_vmscan_immediate_reclaim

> Acked-by: Johannes Weiner <jweiner@...hat.com>

Thanks.

-- 
Mel Gorman
SUSE Labs
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