From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030311AbWFIRMW (ORCPT ); Fri, 9 Jun 2006 13:12:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030308AbWFIRMW (ORCPT ); Fri, 9 Jun 2006 13:12:22 -0400 Received: from srv5.dvmed.net ([207.36.208.214]:35473 "EHLO mail.dvmed.net") by vger.kernel.org with ESMTP id S1030238AbWFIRMU (ORCPT ); Fri, 9 Jun 2006 13:12:20 -0400 Message-ID: <4489ABF0.2010703@garzik.org> Date: Fri, 09 Jun 2006 13:12:16 -0400 From: Jeff Garzik User-Agent: Thunderbird 1.5.0.2 (X11/20060501) MIME-Version: 1.0 To: Alex Tomas CC: Linus Torvalds , Andrew Morton , ext2-devel , linux-kernel@vger.kernel.org, cmm@us.ibm.com, linux-fsdevel@vger.kernel.org, Andreas Dilger Subject: Re: [Ext2-devel] [RFC 0/13] extents and 48bit ext3 References: <1149816055.4066.60.camel@dyn9047017069.beaverton.ibm.com> <4488E1A4.20305@garzik.org> <20060609083523.GQ5964@schatzie.adilger.int> <44898EE3.6080903@garzik.org> <448992EB.5070405@garzik.org> <4489A7ED.8070007@garzik.org> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: -4.2 (----) X-Spam-Report: SpamAssassin version 3.1.1 on srv5.dvmed.net summary: Content analysis details: (-4.2 points, 5.0 required) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Alex Tomas wrote: >>>>>> Jeff Garzik (JG) writes: > > JG> That is what the entirety of Linux development is -- step-by-step. > > JG> It is OBVIOUS that it would take five minutes to start ext4. > > right. it's not a problem to *start*. it's a problem it maintain. > day by day fs/ext3 and fs/ext4 will get more and more diffs. > at some point it will be a headache to apply patches from ext3 > to ext4 and back. I known this very well .... As Linus has stated, we have empirical evidence that splitting filesystems works, for both stability and development speed. The number of patches to ext[23] will trickle off over time. As the obvious example, ext4 would receive the extent and 48bit patches rather than ext3 :) Jeff