Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755180AbXKWAWV (ORCPT ); Thu, 22 Nov 2007 19:22:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751719AbXKWAWN (ORCPT ); Thu, 22 Nov 2007 19:22:13 -0500 Received: from waste.org ([66.93.16.53]:44508 "EHLO waste.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751409AbXKWAWM (ORCPT ); Thu, 22 Nov 2007 19:22:12 -0500 Date: Thu, 22 Nov 2007 18:21:41 -0600 From: Matt Mackall To: David Chinner Cc: Andi Kleen , xfs-oss , lkml Subject: Re: [PATCH 2/9]: Reduce Log I/O latency Message-ID: <20071123002141.GU19691@waste.org> References: <20071122003339.GH114266761__34694.2978365861$1195691722$gmane$org@sgi.com> <20071122011214.GR114266761@sgi.com> <20071122025726.GG17536@waste.org> <20071122034106.GV114266761@sgi.com> <20071122072549.GQ19691@waste.org> <20071122103159.GW114266761@sgi.com> <20071122181029.GR19691@waste.org> <20071122222909.GY114266761@sgi.com> <20071122230922.GZ114266761@sgi.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20071122230922.GZ114266761@sgi.com> User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1114 Lines: 26 On Fri, Nov 23, 2007 at 10:09:22AM +1100, David Chinner wrote: > On Fri, Nov 23, 2007 at 09:29:09AM +1100, David Chinner wrote: > > On Thu, Nov 22, 2007 at 12:10:29PM -0600, Matt Mackall wrote: > > > If I've got XFS on filesystems A and B on the same spindle (or volume > > > group?) and my real RT I/O takes place only on B, then I want log > > > flushing to happen in RT on B. But -never on A-. If I can do this with > > > a tunable, I'm perfectly happy. > > > > No, not another mount option. I'm just going to drop this one for > > now... > > Actually, I might change it to use the highest non-rt priority, which > would solve the latency issues in the normal cases and still leave > the RT rope dangling for those that want to use it. > > Is that an acceptible compromise, Matt? Yes, that's perfectly fine. -- Mathematics is the supreme nostalgia of our time. - 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/