Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932249AbWHYIqe (ORCPT ); Fri, 25 Aug 2006 04:46:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932284AbWHYIqe (ORCPT ); Fri, 25 Aug 2006 04:46:34 -0400 Received: from smtp.agh.edu.pl ([149.156.96.16]:55936 "EHLO smtp.agh.edu.pl") by vger.kernel.org with ESMTP id S932249AbWHYIqd (ORCPT ); Fri, 25 Aug 2006 04:46:33 -0400 Message-ID: <44EEB8EF.5050505@agh.edu.pl> Date: Fri, 25 Aug 2006 10:46:39 +0200 From: Andrzej Szymanski Organization: AGH University of Science and Technology, Dept. of Telecommunications User-Agent: Thunderbird 1.5 (Windows/20051201) MIME-Version: 1.0 To: Neil Brown Cc: Miquel van Smoorenburg , linux-kernel@vger.kernel.org Subject: Re: Strange write starvation on 2.6.17 (and other) kernels References: <44E0A69C.5030103@agh.edu.pl> <17641.3304.948174.971955@cse.unsw.edu.au> <44E9A9C0.6000405@agh.edu.pl> <17642.46325.818963.951269@cse.unsw.edu.au> <17646.36219.417129.477853@cse.unsw.edu.au> In-Reply-To: <17646.36219.417129.477853@cse.unsw.edu.au> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 886 Lines: 26 Neil Brown wrote: > On Tuesday August 22, neilb@suse.de wrote: >> In my various experimenting the one thing that was effective in >> improving the fairness was to make Linux impose write throttling more >> often. > > I might have found something else too.... > > Were you using ext3? > > If you, can you try mounting with data=writeback > and see if that makes any difference to the fairness? > > Thanks, > NeilBrown I've already tried data=writeback - almost no difference or it makes things even worse. I've briefly tested XFS filesystem, and I've seen the same behavior as in ext3 so it does not seem to be ext3 related. Andrzej. - 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/