From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx199.postini.com [74.125.245.199]) by kanga.kvack.org (Postfix) with SMTP id 592DD6B016D for ; Wed, 1 May 2013 04:08:23 -0400 (EDT) Date: Wed, 1 May 2013 09:08:19 +0100 From: Mel Gorman Subject: Re: [RFC PATCH 0/3] Obey mark_page_accessed hint given by filesystems Message-ID: <20130501080819.GF11497@suse.de> References: <1367253119-6461-1-git-send-email-mgorman@suse.de> <5180B601.8080005@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <5180B601.8080005@gmail.com> Sender: owner-linux-mm@kvack.org List-ID: To: Will Huck Cc: Alexey Lyahkov , Andrew Perepechko , Robin Dong , Theodore Tso , Andrew Morton , Hugh Dickins , Rik van Riel , Johannes Weiner , Bernd Schubert , David Howells , Trond Myklebust , Linux-fsdevel , Linux-ext4 , LKML , Linux-mm On Wed, May 01, 2013 at 02:28:17PM +0800, Will Huck wrote: > Hi Mel, > On 04/30/2013 12:31 AM, Mel Gorman wrote: > >Andrew Perepechko reported a problem whereby pages are being prematurely > >evicted as the mark_page_accessed() hint is ignored for pages that are > >currently on a pagevec -- http://www.spinics.net/lists/linux-ext4/msg37340.html . > >Alexey Lyahkov and Robin Dong have also reported problems recently that > >could be due to hot pages reaching the end of the inactive list too quickly > >and be reclaimed. > > Both shrink_active_list and shrink_inactive_list can call > lru_add_drain(), why the hot pages can't be mark Actived during this > time? > Because by then it's not known that the filesystem had called mark_page_accessed() to indicate the page should be activated. -- Mel Gorman SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org