From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756388AbZEOS32 (ORCPT ); Fri, 15 May 2009 14:29:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753244AbZEOS3Q (ORCPT ); Fri, 15 May 2009 14:29:16 -0400 Received: from smtp3.ultrahosting.com ([74.213.175.254]:55237 "EHLO smtp.ultrahosting.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750958AbZEOS3P (ORCPT ); Fri, 15 May 2009 14:29:15 -0400 Date: Fri, 15 May 2009 14:09:25 -0400 (EDT) From: Christoph Lameter X-X-Sender: cl@qirst.com To: KOSAKI Motohiro cc: Wu Fengguang , Andrew Morton , "hannes@cmpxchg.org" , "peterz@infradead.org" , "riel@redhat.com" , "linux-kernel@vger.kernel.org" , "tytso@mit.edu" , "linux-mm@kvack.org" , "elladan@eskimo.com" , "npiggin@suse.de" , "minchan.kim@gmail.com" Subject: Re: [PATCH -mm] vmscan: protect a fraction of file backed mapped pages from reclaim In-Reply-To: <20090515082312.F5B6.A69D9226@jp.fujitsu.com> Message-ID: References: <20090513084306.5874.A69D9226@jp.fujitsu.com> <20090515082312.F5B6.A69D9226@jp.fujitsu.com> User-Agent: Alpine 1.10 (DEB 962 2008-03-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 15 May 2009, KOSAKI Motohiro wrote: > May I ask detail operation? Detailed operation? Well no. More of an experience. Browse the web in the evening. Let the backup run overnight. Try to access the web in the morning. Pretty unscientific. > > Observation of the typical mapped size of Firefox under KDE. > > My point is, desktop people have very various mapped ratio. > Do you oppose this? No of course not. Loads may have different mapped ratios. That is why there is a /proc/sys/vm tunable in my patch (which is not good as mentioned in the patch). If Rik's solution works without it great.