From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754010Ab1HJMpO (ORCPT ); Wed, 10 Aug 2011 08:45:14 -0400 Received: from mx1.redhat.com ([209.132.183.28]:42318 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753312Ab1HJMpM (ORCPT ); Wed, 10 Aug 2011 08:45:12 -0400 Date: Wed, 10 Aug 2011 14:44:50 +0200 From: Johannes Weiner To: Mel Gorman Cc: Linux-MM , LKML , XFS , Dave Chinner , Christoph Hellwig , Wu Fengguang , Jan Kara , Rik van Riel , Minchan Kim Subject: Re: [PATCH 5/7] mm: vmscan: Do not writeback filesystem pages in kswapd except in high priority Message-ID: <20110810124450.GC24133@redhat.com> References: <1312973240-32576-1-git-send-email-mgorman@suse.de> <1312973240-32576-6-git-send-email-mgorman@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1312973240-32576-6-git-send-email-mgorman@suse.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Aug 10, 2011 at 11:47:18AM +0100, Mel Gorman wrote: > It is preferable that no dirty pages are dispatched for cleaning from > the page reclaim path. At normal priorities, this patch prevents kswapd > writing pages. > > However, page reclaim does have a requirement that pages be freed > in a particular zone. If it is failing to make sufficient progress > (reclaiming < SWAP_CLUSTER_MAX at any priority priority), the priority > is raised to scan more pages. A priority of DEF_PRIORITY - 3 is > considered to be the point where kswapd is getting into trouble > reclaiming pages. If this priority is reached, kswapd will dispatch > pages for writing. > > Signed-off-by: Mel Gorman > Reviewed-by: Minchan Kim Acked-by: Johannes Weiner From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id p7ACj03i188002 for ; Wed, 10 Aug 2011 07:45:00 -0500 Received: from mx1.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0D8B21E73BAD for ; Wed, 10 Aug 2011 05:44:59 -0700 (PDT) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id 3l0Y4MBFkKrPymID for ; Wed, 10 Aug 2011 05:44:59 -0700 (PDT) Date: Wed, 10 Aug 2011 14:44:50 +0200 From: Johannes Weiner Subject: Re: [PATCH 5/7] mm: vmscan: Do not writeback filesystem pages in kswapd except in high priority Message-ID: <20110810124450.GC24133@redhat.com> References: <1312973240-32576-1-git-send-email-mgorman@suse.de> <1312973240-32576-6-git-send-email-mgorman@suse.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1312973240-32576-6-git-send-email-mgorman@suse.de> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: Mel Gorman Cc: Rik van Riel , Jan Kara , LKML , XFS , Christoph Hellwig , Linux-MM , Minchan Kim , Wu Fengguang On Wed, Aug 10, 2011 at 11:47:18AM +0100, Mel Gorman wrote: > It is preferable that no dirty pages are dispatched for cleaning from > the page reclaim path. At normal priorities, this patch prevents kswapd > writing pages. > > However, page reclaim does have a requirement that pages be freed > in a particular zone. If it is failing to make sufficient progress > (reclaiming < SWAP_CLUSTER_MAX at any priority priority), the priority > is raised to scan more pages. A priority of DEF_PRIORITY - 3 is > considered to be the point where kswapd is getting into trouble > reclaiming pages. If this priority is reached, kswapd will dispatch > pages for writing. > > Signed-off-by: Mel Gorman > Reviewed-by: Minchan Kim Acked-by: Johannes Weiner _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail138.messagelabs.com (mail138.messagelabs.com [216.82.249.35]) by kanga.kvack.org (Postfix) with SMTP id 782D990013D for ; Wed, 10 Aug 2011 08:44:59 -0400 (EDT) Date: Wed, 10 Aug 2011 14:44:50 +0200 From: Johannes Weiner Subject: Re: [PATCH 5/7] mm: vmscan: Do not writeback filesystem pages in kswapd except in high priority Message-ID: <20110810124450.GC24133@redhat.com> References: <1312973240-32576-1-git-send-email-mgorman@suse.de> <1312973240-32576-6-git-send-email-mgorman@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1312973240-32576-6-git-send-email-mgorman@suse.de> Sender: owner-linux-mm@kvack.org List-ID: To: Mel Gorman Cc: Linux-MM , LKML , XFS , Dave Chinner , Christoph Hellwig , Wu Fengguang , Jan Kara , Rik van Riel , Minchan Kim On Wed, Aug 10, 2011 at 11:47:18AM +0100, Mel Gorman wrote: > It is preferable that no dirty pages are dispatched for cleaning from > the page reclaim path. At normal priorities, this patch prevents kswapd > writing pages. > > However, page reclaim does have a requirement that pages be freed > in a particular zone. If it is failing to make sufficient progress > (reclaiming < SWAP_CLUSTER_MAX at any priority priority), the priority > is raised to scan more pages. A priority of DEF_PRIORITY - 3 is > considered to be the point where kswapd is getting into trouble > reclaiming pages. If this priority is reached, kswapd will dispatch > pages for writing. > > Signed-off-by: Mel Gorman > Reviewed-by: Minchan Kim Acked-by: Johannes Weiner -- 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