Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760536AbZCaT2A (ORCPT ); Tue, 31 Mar 2009 15:28:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754634AbZCaT1u (ORCPT ); Tue, 31 Mar 2009 15:27:50 -0400 Received: from lazybastard.de ([212.112.238.170]:55782 "EHLO longford.logfs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754077AbZCaT1u (ORCPT ); Tue, 31 Mar 2009 15:27:50 -0400 Date: Tue, 31 Mar 2009 20:45:17 +0200 From: =?utf-8?B?SsO2cm4=?= Engel To: Jeff Garzik Cc: Mark Lord , Stefan Richter , Linus Torvalds , Matthew Garrett , Alan Cox , Theodore Tso , Andrew Morton , David Rees , Jesper Krogh , Linux Kernel Mailing List Subject: Re: Linux 2.6.29 Message-ID: <20090331184517.GA25879@logfs.org> References: <49CD7B10.7010601@garzik.org> <49CD891A.7030103@rtr.ca> <49CD9047.4060500@garzik.org> <49CE2633.2000903@s5r6.in-berlin.de> <49CE3186.8090903@garzik.org> <49CE35AE.1080702@s5r6.in-berlin.de> <49CE3F74.6090103@rtr.ca> <49CECC7B.70100@garzik.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <49CECC7B.70100@garzik.org> User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1101 Lines: 27 On Sat, 28 March 2009 21:18:51 -0400, Jeff Garzik wrote: > > Was the BSD soft-updates idea of FS data-before-metadata a good one? > Yes. Obviously. > > It is the cornerstone of every SANE journalling-esque database or > filesystem out there -- don't leave a window where your metadata is > inconsistent. "Duh" :) Your idea of 'consistent' seems a bit fuzzy. Soft updates, afaiu, leave plenty of windows and reasons to run fsck. They only guarantee that all those windows result in lost space - data allocations without any references. It certainly prevents the worst problems, but I would use a different word for it. :) Jörn -- Don't worry about people stealing your ideas. If your ideas are any good, you'll have to ram them down people's throats. -- Howard Aiken quoted by Ken Iverson quoted by Jim Horning quoted by Raph Levien, 1979 -- 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/