From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 1 Aug 2001 13:08:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 1 Aug 2001 13:08:08 -0400 Received: from nat-pool-meridian.redhat.com ([199.183.24.200]:6478 "EHLO devserv.devel.redhat.com") by vger.kernel.org with ESMTP id ; Wed, 1 Aug 2001 13:07:58 -0400 Date: Wed, 1 Aug 2001 17:39:51 +0100 From: "Stephen C. Tweedie" To: ext3-users@redhat.com Cc: Sean Hunter , linux-kernel@vger.kernel.org Subject: Re: Strane remount behaviour with ext3-2.4-0.9.4 Message-ID: <20010801173951.I3744@redhat.com> In-Reply-To: <20010727104049.B6311@uncarved.com> <200107271715.f6RHFea24226@lynx.adilger.int> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <200107271715.f6RHFea24226@lynx.adilger.int>; from adilger@turbolinux.com on Fri, Jul 27, 2001 at 11:15:39AM -0600 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, On Fri, Jul 27, 2001 at 11:15:39AM -0600, Andreas Dilger wrote: > > servers. Since the server in question is a farily security-sensitive box, my > > /usr partition is mounted read only except when I remount rw to install > > packages. > > If it is a security-sensitive box, you need to at least use data=ordered or > data=journal. Using data=writeback allows the possibility that after a crash > one user might be able to read data from deleted files of another user (note > that reiserfs currently only runs the equivalent of data=writeback). Agreed, and for most workloads data=ordered will have very little performance difference from data=writeback. > You _could_ leave out the data=writeback from /etc/fstab (default is ordered), > and you will be able to remount OK. Also, Andrew made a patch which allowed > you to specify the data= mode on remount, as long it is the same. Indeed, but I'll need to make sure that the remount with no data= mode also works (that should be legal.) Cheers, Stephen