Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756826AbYAVXmV (ORCPT ); Tue, 22 Jan 2008 18:42:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753385AbYAVXmM (ORCPT ); Tue, 22 Jan 2008 18:42:12 -0500 Received: from mx1.redhat.com ([66.187.233.31]:59201 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752389AbYAVXmJ (ORCPT ); Tue, 22 Jan 2008 18:42:09 -0500 Date: Tue, 22 Jan 2008 23:40:52 +0000 From: Alasdair G Kergon To: Martin Knoblauch Cc: Linus Torvalds , Mel Gorman , Fengguang Wu , Mike Snitzer , Peter Zijlstra , jplatte@naasa.net, Ingo Molnar , linux-kernel@vger.kernel.org, "linux-ext4@vger.kernel.org" , James.Bottomley@steeleye.com, Jens Axboe , Milan Broz , Neil Brown Subject: Re: regression: 100% io-wait with 2.6.24-rcX Message-ID: <20080122234051.GP8075@agk.fab.redhat.com> Mail-Followup-To: Alasdair G Kergon , Martin Knoblauch , Linus Torvalds , Mel Gorman , Fengguang Wu , Mike Snitzer , Peter Zijlstra , jplatte@naasa.net, Ingo Molnar , linux-kernel@vger.kernel.org, "linux-ext4@vger.kernel.org" , James.Bottomley@steeleye.com, Jens Axboe , Milan Broz , Neil Brown References: <87924.1242.qm@web32614.mail.mud.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87924.1242.qm@web32614.mail.mud.yahoo.com> User-Agent: Mutt/1.4.1i Organization: Red Hat UK Ltd. Registered in England and Wales, number 03798903. Registered Office: Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE. Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 726 Lines: 18 On Tue, Jan 22, 2008 at 07:25:15AM -0800, Martin Knoblauch wrote: > [root@lpsdm52 ~]# dmsetup table > VolGroup00-LogVol02: 0 350945280 linear 104:2 67109248 > VolGroup00-LogVol01: 0 8388608 linear 104:2 418054528 > VolGroup00-LogVol00: 0 67108864 linear 104:2 384 The IO should pass straight through simple linear targets like that without needing to get broken up, so I wouldn't expect those patches to make any difference in this particular case. Alasdair -- agk@redhat.com -- 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/