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Message-ID: <20130501080644.GE11497@suse.de>
Date: Wed, 1 May 2013 09:06:44 +0100
From: Mel Gorman <mgorman@...e.de>
To: Sam Ben <sam.bennn@...il.com>
Cc: Alexey Lyahkov <alexey.lyashkov@...il.com>,
Andrew Perepechko <anserper@...ru>,
Robin Dong <sanbai@...bao.com>, Theodore Tso <tytso@....edu>,
Andrew Morton <akpm@...ux-foundation.org>,
Hugh Dickins <hughd@...gle.com>,
Rik van Riel <riel@...hat.com>,
Johannes Weiner <hannes@...xchg.org>,
Bernd Schubert <bernd.schubert@...tmail.fm>,
David Howells <dhowells@...hat.com>,
Trond Myklebust <Trond.Myklebust@...app.com>,
Linux-fsdevel <linux-fsdevel@...r.kernel.org>,
Linux-ext4 <linux-ext4@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>,
Linux-mm <linux-mm@...ck.org>
Subject: Re: [PATCH 2/3] mm: Ensure that mark_page_accessed moves pages to
the active list
On Wed, May 01, 2013 at 01:41:34PM +0800, Sam Ben wrote:
> Hi Mel,
> On 04/30/2013 12:31 AM, Mel Gorman wrote:
> >If a page is on a pagevec then it is !PageLRU and mark_page_accessed()
> >may fail to move a page to the active list as expected. Now that the
> >LRU is selected at LRU drain time, mark pages PageActive if they are
> >on a pagevec so it gets moved to the correct list at LRU drain time.
> >Using a debugging patch it was found that for a simple git checkout
> >based workload that pages were never added to the active file list in
>
> Could you show us the details of your workload?
>
The workload is git checkouts of a fixed number of commits for the
kernel git tree. It starts with a warm-up run that is not timed and then
records the time for a number of iterations.
--
Mel Gorman
SUSE Labs
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