From: Andreas Dilger Subject: Re: [Ext2-devel] rfc: [patch 3/6] more e2fsprogs fixes Date: Wed, 6 Sep 2006 04:47:32 -0600 Message-ID: <20060906104732.GP20105@schatzie.adilger.int> References: <20060825131138.GA20278@openx1.frec.bull.fr> <20060825131840.GC20944@openx1.frec.bull.fr> <20060825235049.GP6634@schatzie.adilger.int> <20060904145941.GA9427@openx1.frec.bull.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-ext4@vger.kernel.org Return-path: Received: from mail.clusterfs.com ([206.168.112.78]:32395 "EHLO mail.clusterfs.com") by vger.kernel.org with ESMTP id S1750772AbWIFKsw (ORCPT ); Wed, 6 Sep 2006 06:48:52 -0400 To: Alexandre Ratchov Content-Disposition: inline In-Reply-To: <20060904145941.GA9427@openx1.frec.bull.fr> Sender: linux-ext4-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org On Sep 04, 2006 16:59 +0200, Alexandre Ratchov wrote: > in order tu use 48bit adressing, we have to use larger block groups (because > all group descriptors must fit in one block group). So we'll need 16bit > "_hi" bits for blocks_count, inodes_count and perhaps used_dirs_count. And > this leaves no room for additional fields. > > There's already a patch that makes the descriptor structure size variable > (similarly to the inode size), see marc.theaimsgroup.com/?m=114968738307171 > Here is the updated patch set: It was always my desire to require the use of the larger group descriptors when using a filesystem with > 32-bit blocks. That avoids the need to use up the small group descriptors for the 64-bit block numbers, allowing them to be used for other features that are still relevant for smaller filesystems like checksums and UNINIT groups. > linux-2.6.18-rc4: > > http://www.bullopensource.org/ext4/20060904/ext4-linux-2.6.18-rc4.tar.gz > > e2fsprogs-1.39: > > http://www.bullopensource.org/ext4/20060904/ext4-e2fsprogs-1.39.tar.gz Cheers, Andreas -- Andreas Dilger Principal Software Engineer Cluster File Systems, Inc.