Message-ID: <5180CED8.9040505@gmail.com>
Date: Wed, 01 May 2013 16:14:16 +0800
From: Ric Mason <ric.masonn@gmail.com>
User-Agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130329 Thunderbird/17.0.5
MIME-Version: 1.0
To: Mel Gorman <mgorman@suse.de>
CC: Sam Ben <sam.bennn@gmail.com>, Alexey Lyahkov <alexey.lyashkov@gmail.com>,
        Andrew Perepechko <anserper@ya.ru>, Robin Dong <sanbai@taobao.com>,
        Theodore Tso <tytso@mit.edu>,
        Andrew Morton <akpm@linux-foundation.org>,
        Hugh Dickins <hughd@google.com>, Rik van Riel <riel@redhat.com>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Bernd Schubert <bernd.schubert@fastmail.fm>,
        David Howells <dhowells@redhat.com>,
        Trond Myklebust <Trond.Myklebust@netapp.com>,
        Linux-fsdevel <linux-fsdevel@vger.kernel.org>,
        Linux-ext4 <linux-ext4@vger.kernel.org>,
        LKML <linux-kernel@vger.kernel.org>, Linux-mm <linux-mm@kvack.org>
Subject: Re: [PATCH 2/3] mm: Ensure that mark_page_accessed moves pages to
 the active list
References: <1367253119-6461-1-git-send-email-mgorman@suse.de> <1367253119-6461-3-git-send-email-mgorman@suse.de> <5180AB0E.6030407@gmail.com> <20130501080644.GE11497@suse.de>
In-Reply-To: <20130501080644.GE11497@suse.de>
Content-Type: text/plain; charset=ISO-8859-15; format=flowed
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1216
Lines: 29

On 05/01/2013 04:06 PM, Mel Gorman wrote:
> 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

Is there script which you used?

> kernel git tree. It starts with a warm-up run that is not timed and then
> records the time for a number of iterations.

How to record the time for a number of iterations? Is the iteration here 
means lru scan?

>

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/