From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail143.messagelabs.com (mail143.messagelabs.com [216.82.254.35]) by kanga.kvack.org (Postfix) with ESMTP id 02B046B0169 for ; Fri, 29 Jul 2011 05:48:26 -0400 (EDT) Received: by pzk33 with SMTP id 33so6358575pzk.36 for ; Fri, 29 Jul 2011 02:48:24 -0700 (PDT) Date: Fri, 29 Jul 2011 18:48:16 +0900 From: Minchan Kim Subject: Re: [RFC PATCH 0/8] Reduce filesystem writeback from page reclaim v2 Message-ID: <20110729094816.GG1843@barrios-desktop> References: <1311265730-5324-1-git-send-email-mgorman@suse.de> <20110727161821.GA1738@barrios-desktop> <20110728113852.GN3010@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110728113852.GN3010@suse.de> Sender: owner-linux-mm@kvack.org List-ID: To: Mel Gorman Cc: Linux-MM , LKML , XFS , Dave Chinner , Christoph Hellwig , Johannes Weiner , Wu Fengguang , Jan Kara , Rik van Riel On Thu, Jul 28, 2011 at 12:38:52PM +0100, Mel Gorman wrote: > On Thu, Jul 28, 2011 at 01:18:21AM +0900, Minchan Kim wrote: > > On Thu, Jul 21, 2011 at 05:28:42PM +0100, Mel Gorman wrote: > > > Note how preventing kswapd reclaiming dirty pages pushes up its CPU > > > usage as it scans more pages but it does not get excessive due to > > > the throttling. > > > > Good to hear. > > The concern of this patchset was early OOM kill with too many scanning. > > I can throw such concern out from now on. > > > > At least, I haven't been able to trigger a premature OOM. AFAIR, Andrew had a premature OOM problem[1] but I couldn't track down at that time. I think this patch series might solve his problem. Although it doesn't, it should not accelerate his problem, at least. Andrew, Could you test this patchset? [1] https://lkml.org/lkml/2011/5/25/415 -- Kind regards, Minchan Kim -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org