From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761125Ab0J2K1B (ORCPT ); Fri, 29 Oct 2010 06:27:01 -0400 Received: from gir.skynet.ie ([193.1.99.77]:60782 "EHLO gir.skynet.ie" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753029Ab0J2K1A (ORCPT ); Fri, 29 Oct 2010 06:27:00 -0400 Date: Fri, 29 Oct 2010 11:26:46 +0100 From: Mel Gorman To: Christoph Hellwig Cc: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Linux Kernel List , Rik van Riel , Johannes Weiner , Minchan Kim , Wu Fengguang , Andrea Arcangeli , KAMEZAWA Hiroyuki , KOSAKI Motohiro , Dave Chinner , Chris Mason , Christoph Hellwig , Andrew Morton Subject: Re: [PATCH 09/10] vmscan: Do not writeback filesystem pages in direct reclaim Message-ID: <20101029102646.GI4896@csn.ul.ie> References: <1283770053-18833-1-git-send-email-mel@csn.ul.ie> <1283770053-18833-10-git-send-email-mel@csn.ul.ie> <20101028215046.GA15586@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <20101028215046.GA15586@infradead.org> User-Agent: Mutt/1.5.17+20080114 (2008-01-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Oct 28, 2010 at 05:50:46PM -0400, Christoph Hellwig wrote: > Looks like this once again didn't get merged for 2.6.37. Any reason > for that? > There are still concerns as to whether this is a good idea or or whether we are papering over the fact that there are too many dirty pages at the end of the LRU. The tracepoints necessary to track the dirty pages encountered went in this cycle as well as some writeback and congestion-waiting changes. I was waiting for some of the writeback churn to die down before revisiting this. The ideal point to reach is "we hardly ever encounter dirty pages so disabling direct writeback has no impact". -- Mel Gorman Part-time Phd Student Linux Technology Center University of Limerick IBM Dublin Software Lab From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mel Gorman Subject: Re: [PATCH 09/10] vmscan: Do not writeback filesystem pages in direct reclaim Date: Fri, 29 Oct 2010 11:26:46 +0100 Message-ID: <20101029102646.GI4896@csn.ul.ie> References: <1283770053-18833-1-git-send-email-mel@csn.ul.ie> <1283770053-18833-10-git-send-email-mel@csn.ul.ie> <20101028215046.GA15586@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Cc: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Linux Kernel List , Rik van Riel , Johannes Weiner , Minchan Kim , Wu Fengguang , Andrea Arcangeli , KAMEZAWA Hiroyuki , KOSAKI Motohiro , Dave Chinner , Chris Mason , Christoph Hellwig , Andrew Morton To: Christoph Hellwig Return-path: Content-Disposition: inline In-Reply-To: <20101028215046.GA15586@infradead.org> Sender: owner-linux-mm@kvack.org List-Id: linux-fsdevel.vger.kernel.org On Thu, Oct 28, 2010 at 05:50:46PM -0400, Christoph Hellwig wrote: > Looks like this once again didn't get merged for 2.6.37. Any reason > for that? > There are still concerns as to whether this is a good idea or or whether we are papering over the fact that there are too many dirty pages at the end of the LRU. The tracepoints necessary to track the dirty pages encountered went in this cycle as well as some writeback and congestion-waiting changes. I was waiting for some of the writeback churn to die down before revisiting this. The ideal point to reach is "we hardly ever encounter dirty pages so disabling direct writeback has no impact". -- Mel Gorman Part-time Phd Student Linux Technology Center University of Limerick IBM Dublin Software Lab -- 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