From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750807AbXBWDdc (ORCPT ); Thu, 22 Feb 2007 22:33:32 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750808AbXBWDdc (ORCPT ); Thu, 22 Feb 2007 22:33:32 -0500 Received: from mx1.redhat.com ([66.187.233.31]:55978 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750807AbXBWDdc (ORCPT ); Thu, 22 Feb 2007 22:33:32 -0500 Message-ID: <45DE6080.6030904@redhat.com> Date: Thu, 22 Feb 2007 22:33:20 -0500 From: Rik van Riel Organization: Red Hat, Inc User-Agent: Thunderbird 1.5.0.7 (X11/20061008) MIME-Version: 1.0 To: yunfeng zhang CC: linux-kernel@vger.kernel.org, Hugh Dickins , linux-mm@kvack.org Subject: Re: [PATCH 2.6.20-rc5 1/1] MM: enhance Linux swap subsystem References: <4df04b840701212309l2a283357jbdaa88794e5208a7@mail.gmail.com> <4df04b840701222021w5e1aaab2if2ba7fc38d06d64b@mail.gmail.com> <4df04b840701222108o6992933bied5fff8a525413@mail.gmail.com> <4df04b840701301852i41687edfl1462c4ca3344431c@mail.gmail.com> <4df04b840702122152o64b2d59cy53afcd43bb24cb7a@mail.gmail.com> <4df04b840702200106q670ff944k118d218fed17b884@mail.gmail.com> <4df04b840702211758t1906083x78fb53b6283349ca@mail.gmail.com> <45DCFDBE.50209@redhat.com> <4df04b840702221831x76626de1rfa70cb653b12f495@mail.gmail.com> In-Reply-To: <4df04b840702221831x76626de1rfa70cb653b12f495@mail.gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org yunfeng zhang wrote: > Performance improvement should occur when private pages of multiple > processes are messed up, Ummm, yes. Linux used to do this, but doing virtual scans just does not scale when a system has a really large amount of memory, a large number of processes and multiple zones. We've seen it fall apart with as little as 8GB of RAM. -- Politics is the struggle between those who want to make their country the best in the world, and those who believe it already is. Each group calls the other unpatriotic. From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <45DE6080.6030904@redhat.com> Date: Thu, 22 Feb 2007 22:33:20 -0500 From: Rik van Riel MIME-Version: 1.0 Subject: Re: [PATCH 2.6.20-rc5 1/1] MM: enhance Linux swap subsystem References: <4df04b840701212309l2a283357jbdaa88794e5208a7@mail.gmail.com> <4df04b840701222021w5e1aaab2if2ba7fc38d06d64b@mail.gmail.com> <4df04b840701222108o6992933bied5fff8a525413@mail.gmail.com> <4df04b840701301852i41687edfl1462c4ca3344431c@mail.gmail.com> <4df04b840702122152o64b2d59cy53afcd43bb24cb7a@mail.gmail.com> <4df04b840702200106q670ff944k118d218fed17b884@mail.gmail.com> <4df04b840702211758t1906083x78fb53b6283349ca@mail.gmail.com> <45DCFDBE.50209@redhat.com> <4df04b840702221831x76626de1rfa70cb653b12f495@mail.gmail.com> In-Reply-To: <4df04b840702221831x76626de1rfa70cb653b12f495@mail.gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: yunfeng zhang Cc: linux-kernel@vger.kernel.org, Hugh Dickins , linux-mm@kvack.org List-ID: yunfeng zhang wrote: > Performance improvement should occur when private pages of multiple > processes are messed up, Ummm, yes. Linux used to do this, but doing virtual scans just does not scale when a system has a really large amount of memory, a large number of processes and multiple zones. We've seen it fall apart with as little as 8GB of RAM. -- Politics is the struggle between those who want to make their country the best in the world, and those who believe it already is. Each group calls the other unpatriotic. -- 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