From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263647AbTJOQ6P (ORCPT ); Wed, 15 Oct 2003 12:58:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263650AbTJOQ6P (ORCPT ); Wed, 15 Oct 2003 12:58:15 -0400 Received: from h68-147-142-75.cg.shawcable.net ([68.147.142.75]:24048 "EHLO schatzie.adilger.int") by vger.kernel.org with ESMTP id S263647AbTJOQ6N (ORCPT ); Wed, 15 Oct 2003 12:58:13 -0400 Date: Wed, 15 Oct 2003 10:56:55 -0600 From: Andreas Dilger To: David Woodhouse Cc: josh@temp123.org, linux-kernel@vger.kernel.org Subject: Re: Transparent compression in the FS Message-ID: <20031015105655.C1593@schatzie.adilger.int> Mail-Followup-To: David Woodhouse , josh@temp123.org, linux-kernel@vger.kernel.org References: <1066163449.4286.4.camel@Borogove> <1066235105.14783.1602.camel@hades.cambridge.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: <1066235105.14783.1602.camel@hades.cambridge.redhat.com>; from dwmw2@infradead.org on Wed, Oct 15, 2003 at 05:25:06PM +0100 X-GPG-Key: 1024D/0D35BED6 X-GPG-Fingerprint: 7A37 5D79 BF1B CECA D44F 8A29 A488 39F5 0D35 BED6 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Oct 15, 2003 17:25 +0100, David Woodhouse wrote: > On Tue, 2003-10-14 at 16:30 -0400, Josh Litherland wrote: > > Are there any filesystems which implement the transparent compression > > attribute ? (chattr +c) > > JFFS2 doesn't implement 'chattr +c', which is in fact an EXT2-private > ioctl. But it does do transparent compression. Actually, reiserfs also supports ext2-compatible SETFLAGS/GETFLAGS ioctls. This allows us to use the same tools for lsattr and chattr instead of using lsattr.reiserfs, etc. Our Lustre distributed filesystem does the same. Cheers, Andreas -- Andreas Dilger http://sourceforge.net/projects/ext2resize/ http://www-mddsp.enel.ucalgary.ca/People/adilger/