From: Ric Wheeler Subject: Re: default ext3 journal mode - time to poke at this again? Date: Mon, 20 Jul 2009 15:25:00 -0400 Message-ID: <4A64C48C.8000504@redhat.com> References: <4A61C60D.5090702@gmail.com> <20090720185731.GA9002@atrey.karlin.mff.cuni.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, "Stephen C. Tweedie" , Theodore Tso , Andreas Dilger , Eric Sandeen , Christoph Hellwig To: Jan Kara Return-path: In-Reply-To: <20090720185731.GA9002@atrey.karlin.mff.cuni.cz> Sender: linux-fsdevel-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org On 07/20/2009 02:57 PM, Jan Kara wrote: > Hi, > > >> At the linux symposium this week, some of us were wondering when it >> would be safe to try and default ext3's default journal mode back to >> sanity given that all (?) distros immediately reverted the default to >> data writeback mode. >> > Well, at least SUSE still uses data=ordered,barrier as a default (and > I personally think this is the right thing to do). Hmm, maybe you've > meant this and just wrote it otherwise given your paragraph below ;) > Definitely what I meant to post - Fedora and RHEL both use ordered mode as a default as well. Not many fs developers are fans of data writeback mode as far as I can tell... > >> Failing that, can we at least clean up the config option description to >> properly give the normal users a non-bogus, technical description of the >> trade off ? >> > Yes, I'm all for it. Will you try to write up something or should I? > > Honza > I posted something (from rwheeler@redhat.com) earlier today and we had a discussion about this on the ext4 call. I think that Ted will try to update the text that I proposed over the next couple of days. I think that Chris will be reposting his data guarded mode patches soon as well, so we might be able to move forward quickly :-) ric