Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757645AbZCXJdU (ORCPT ); Tue, 24 Mar 2009 05:33:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755487AbZCXJdJ (ORCPT ); Tue, 24 Mar 2009 05:33:09 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:38066 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753651AbZCXJdJ (ORCPT ); Tue, 24 Mar 2009 05:33:09 -0400 Date: Tue, 24 Mar 2009 10:32:45 +0100 From: Ingo Molnar To: Alan Cox Cc: David Rees , Jesper Krogh , Linus Torvalds , Linux Kernel Mailing List Subject: Re: Linux 2.6.29 Message-ID: <20090324093245.GA22483@elte.hu> References: <49C87B87.4020108@krogh.cc> <72dbd3150903232346g5af126d7sb5ad4949a7b5041f@mail.gmail.com> <20090324091545.758d00f5@lxorguk.ukuu.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090324091545.758d00f5@lxorguk.ukuu.org.uk> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 900 Lines: 22 * Alan Cox wrote: > > posted to the list earlier trying to see if there was anything that > > could be done to help my specific case. I've got a system where if > > someone starts writing out a large file, it kills client NFS writes. > > Makes the system unusable: > > http://marc.info/?l=linux-kernel&m=123732127919368&w=2 > > I have not had this problem since I applied Arjan's (for some reason > repeatedly rejected) patch to change the ioprio of the various writeback > daemons. Under some loads changing to the noop I/O scheduler also seems > to help (as do most of the non default ones) (link would be useful) Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/