From: Dave Chinner Subject: Re: [LSF/MM TOPIC] Drop ext2/ext3 codebase? When? Date: Tue, 15 Feb 2011 15:28:37 +1100 Message-ID: <20110215042837.GD13052@dastard> References: <20110203144011.GA28409@quack.suse.cz> <4D4AC4E2.701@redhat.com> <20110204131739.GC4104@quack.suse.cz> <20110214172504.GC3018@quack.suse.cz> <20110214195845.GD4255@thunk.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Amir Goldstein , Jan Kara , Michael Rubin , Eric Sandeen , linux-ext4@vger.kernel.org, Andrew Morton To: Ted Ts'o Return-path: Received: from ipmail04.adl6.internode.on.net ([150.101.137.141]:28967 "EHLO ipmail04.adl6.internode.on.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751231Ab1BOEdq (ORCPT ); Mon, 14 Feb 2011 23:33:46 -0500 Content-Disposition: inline In-Reply-To: <20110214195845.GD4255@thunk.org> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Mon, Feb 14, 2011 at 02:58:45PM -0500, Ted Ts'o wrote: > -lsf-pc, -linux-fsdevel > > On Mon, Feb 14, 2011 at 09:00:58PM +0200, Amir Goldstein wrote: > > Yes, of course. Upgraders won't be the ones using snapshots. > > My intension was to state that those people installing new systems to test > > snapshots would be functioning as testers for "ext3 mode", because: > > 1. when no snapshots exists it boils down to testing "ext3 mode". > > 2. it is unlikely that snapshots will mask "ext3 mode" bugs. > > > > So my claim is that "ext3 mode" would benefit from a transition > > period in which snapshots and (extens,delalloc) are mutually > > exclusive in ext4. > > Here are the requirements that I think are critical before we do this: > > 1) We need to solve the testing matrix problem. Right now "ext3 mode" > in ext4 doesn't get enough testing as it is. Part of the solution is > (a) deciding on the modes that need testing, and (b) writing some > shell scripts so that xfstests can be automatically run in all of the > right modes. And then it will be having some number of people > (hopefully not just me) running said tests and reporting failures. What scripts are needed? xfstests has the $MKFS_OPTIONS and $MOUNT_OPTIONS environment variables for customising your mkfs and mount parameters for each test run, so isn't testing ext3 filesystems with the ext4 code should just be a matter of setting these appropriately? Cheers, Dave. -- Dave Chinner david@fromorbit.com