From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755584AbYEZS0S (ORCPT ); Mon, 26 May 2008 14:26:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754447AbYEZS0J (ORCPT ); Mon, 26 May 2008 14:26:09 -0400 Received: from E23SMTP06.au.ibm.com ([202.81.18.175]:58395 "EHLO e23smtp06.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754062AbYEZS0I (ORCPT ); Mon, 26 May 2008 14:26:08 -0400 Message-ID: <483B0077.7000207@linux.vnet.ibm.com> Date: Mon, 26 May 2008 23:54:55 +0530 From: Balbir Singh Reply-To: balbir@linux.vnet.ibm.com Organization: IBM User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: Rik van Riel CC: linux-kernel@vger.kernel.org, Andrew Morton , Lee Schermerhorn , Kosaki Motohiro Subject: Re: [PATCH -mm 00/16] VM pageout scalability improvements (V8) References: <20080523195506.084894989@redhat.com> In-Reply-To: <20080523195506.084894989@redhat.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Rik van Riel wrote: > On large memory systems, the VM can spend way too much time scanning > through pages that it cannot (or should not) evict from memory. Not > only does it use up CPU time, but it also provokes lock contention > and can leave large systems under memory presure in a catatonic state. Hi, Rik, This patchset looks good (I did a brief scan). I'll go ahead and play with it? What is a good memory size to test the patches on (to see improvements). -- Warm Regards, Balbir Singh Linux Technology Center IBM, ISTL