From: Eric Sandeen Subject: Re: Test results for ext4 Date: Fri, 30 May 2008 11:28:57 -0500 Message-ID: <48402B49.7000805@redhat.com> References: <48402253.8040407@bull.net> <484024EF.7080304@redhat.com> <4840297C.7030809@bull.net> <48402A1F.8080108@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: ext4 development To: Valerie Clement Return-path: Received: from mx1.redhat.com ([66.187.233.31]:49663 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752314AbYE3Q3Q (ORCPT ); Fri, 30 May 2008 12:29:16 -0400 In-Reply-To: <48402A1F.8080108@redhat.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: Eric Sandeen wrote: > Valerie Clement wrote: >> Eric Sandeen wrote: > >> Oops, I did the test on a device mapper /dev/md0. I forgot to change it in >> the test description. I will do it. >> >> When mounting the xfs filesystem, I've got the following message: >> Filesystem "md0": Disabling barriers, not supported by the underlying device >> >> It means barriers are not supported by my device, isn' it? > > Yep, it should be a fair fight then. :) I saw /dev/sde in the writeup > and figured it probably had barriers on. Oh, also for completeness can you specify which xfsprogs you used? There were some recent changes made which affect the fs geometry, and might affect the results. So it would be good to fully specify. Also why no fragmentation results for xfs or ext3? Thanks, -Eric