From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: with ECARTIS (v1.0.0; list xfs); Thu, 22 Nov 2007 16:22:08 -0800 (PST) Received: from waste.org (waste.org [66.93.16.53]) by oss.sgi.com (8.12.11.20060308/8.12.10/SuSE Linux 0.7) with ESMTP id lAN0Lxth014959 for ; Thu, 22 Nov 2007 16:22:02 -0800 Date: Thu, 22 Nov 2007 18:21:41 -0600 From: Matt Mackall 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> Sender: xfs-bounce@oss.sgi.com Errors-to: xfs-bounce@oss.sgi.com List-Id: xfs To: David Chinner Cc: Andi Kleen , xfs-oss , lkml 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.