From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757117Ab2DZO05 (ORCPT ); Thu, 26 Apr 2012 10:26:57 -0400 Received: from alpha.arachsys.com ([91.203.57.7]:49715 "EHLO alpha.arachsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756916Ab2DZO04 (ORCPT ); Thu, 26 Apr 2012 10:26:56 -0400 Date: Thu, 26 Apr 2012 15:26:43 +0100 From: Richard Davies To: Satoru Moriya Cc: KOSAKI Motohiro , Jerome Marchand , KOSAKI Motohiro , "jweiner@redhat.com" , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "riel@redhat.com" , "lwoodman@redhat.com" , "shaohua.li@intel.com" , "dle-develop@lists.sourceforge.net" , Seiji Aguchi , Minchan Kim Subject: Re: [RFC][PATCH] avoid swapping out with swappiness==0 Message-ID: <20120426142643.GA18863@alpha.arachsys.com> References: <65795E11DBF1E645A09CEC7EAEE94B9CB951A45F@USINDEVS02.corp.hds.com> <20120424082019.GA18395@alpha.arachsys.com> <65795E11DBF1E645A09CEC7EAEE94B9C014649EC4D@USINDEVS02.corp.hds.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <65795E11DBF1E645A09CEC7EAEE94B9C014649EC4D@USINDEVS02.corp.hds.com> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Satoru Moriya wrote: > > I have run into problems with heavy swapping with swappiness==0 and > > was pointed to this thread ( > > http://marc.info/?l=linux-mm&m=133522782307215 ) > > Did you test this patch with your workload? I haven't yet tested this patch. It takes a long time since these are production machines, and the bug itself takes several weeks of production use to really show up. Rik van Riel has pointed out a lot of VM tweaks that he put into 3.4: http://marc.info/?l=linux-mm&m=133536506926326 My intention is to reboot half of our machines into plain 3.4 once it is out, and half onto 3.4 + your patch. Then we can compare behaviour. Will your patch apply cleanly on 3.4? Richard. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx142.postini.com [74.125.245.142]) by kanga.kvack.org (Postfix) with SMTP id C5F8A6B004A for ; Thu, 26 Apr 2012 10:26:54 -0400 (EDT) Date: Thu, 26 Apr 2012 15:26:43 +0100 From: Richard Davies Subject: Re: [RFC][PATCH] avoid swapping out with swappiness==0 Message-ID: <20120426142643.GA18863@alpha.arachsys.com> References: <65795E11DBF1E645A09CEC7EAEE94B9CB951A45F@USINDEVS02.corp.hds.com> <20120424082019.GA18395@alpha.arachsys.com> <65795E11DBF1E645A09CEC7EAEE94B9C014649EC4D@USINDEVS02.corp.hds.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <65795E11DBF1E645A09CEC7EAEE94B9C014649EC4D@USINDEVS02.corp.hds.com> Sender: owner-linux-mm@kvack.org List-ID: To: Satoru Moriya Cc: KOSAKI Motohiro , Jerome Marchand , KOSAKI Motohiro , "jweiner@redhat.com" , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "riel@redhat.com" , "lwoodman@redhat.com" , "shaohua.li@intel.com" , "dle-develop@lists.sourceforge.net" , Seiji Aguchi , Minchan Kim Satoru Moriya wrote: > > I have run into problems with heavy swapping with swappiness==0 and > > was pointed to this thread ( > > http://marc.info/?l=linux-mm&m=133522782307215 ) > > Did you test this patch with your workload? I haven't yet tested this patch. It takes a long time since these are production machines, and the bug itself takes several weeks of production use to really show up. Rik van Riel has pointed out a lot of VM tweaks that he put into 3.4: http://marc.info/?l=linux-mm&m=133536506926326 My intention is to reboot half of our machines into plain 3.4 once it is out, and half onto 3.4 + your patch. Then we can compare behaviour. Will your patch apply cleanly on 3.4? Richard. -- 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