From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754746Ab0G2Ipd (ORCPT ); Thu, 29 Jul 2010 04:45:33 -0400 Received: from bombadil.infradead.org ([18.85.46.34]:48229 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752083Ab0G2Ipa (ORCPT ); Thu, 29 Jul 2010 04:45:30 -0400 Date: Thu, 29 Jul 2010 04:45:23 -0400 From: Christoph Hellwig To: Mel Gorman Cc: Andrew Morton , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, Dave Chinner , Chris Mason , Nick Piggin , Rik van Riel , Johannes Weiner , Christoph Hellwig , Wu Fengguang , KAMEZAWA Hiroyuki , KOSAKI Motohiro , Andrea Arcangeli Subject: Re: [PATCH 0/9] Reduce writeback from page reclaim context V5 Message-ID: <20100729084523.GA537@infradead.org> References: <1280312843-11789-1-git-send-email-mel@csn.ul.ie> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1280312843-11789-1-git-send-email-mel@csn.ul.ie> User-Agent: Mutt/1.5.20 (2009-08-17) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Btw, I'm very happy with all this writeback related progress we've made for the 2.6.36 cycle. The only major thing that's really missing, and which should help dramatically with the I/O patters is stopping direct writeback from balance_dirty_pages(). I've seen patches frrom Wu and and Jan for this and lots of discussion. If we get either variant in this should be once of the best VM release from the filesystem point of view.