From: Nix Subject: Re: Apparent serious progressive ext4 data corruption bug in 3.6 (when rebooting during umount) Date: Thu, 25 Oct 2012 12:06:42 +0100 Message-ID: <871ugm6cal.fsf@spindle.srvr.nix> References: <20121023143019.GA3040@fieldses.org> <874nllxi7e.fsf_-_@spindle.srvr.nix> <87pq48nbyz.fsf_-_@spindle.srvr.nix> <508740B2.2030401@redhat.com> <87txtkld4h.fsf@spindle.srvr.nix> <50876E1D.3040501@redhat.com> <20121024052351.GB21714@thunk.org> <878vavveee.fsf@spindle.srvr.nix> <20121024210819.GA5484@thunk.org> <87y5iv78op.fsf_-_@spindle.srvr.nix> <20121025011056.GC4559@thunk.org> Mime-Version: 1.0 Content-Type: text/plain Cc: Eric Sandeen , linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, "J. Bruce Fields" , Bryan Schumaker , Peng Tao , Trond.Myklebust@netapp.com, gregkh@linuxfoundation.org, Toralf =?utf-8?Q?F=C3=B6rster?= To: "Theodore Ts'o" Return-path: Received: from icebox.esperi.org.uk ([81.187.191.129]:34299 "EHLO mail.esperi.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755896Ab2JYLG5 (ORCPT ); Thu, 25 Oct 2012 07:06:57 -0400 In-Reply-To: <20121025011056.GC4559@thunk.org> (Theodore Ts'o's message of "Wed, 24 Oct 2012 21:10:56 -0400") Sender: linux-ext4-owner@vger.kernel.org List-ID: On 25 Oct 2012, Theodore Ts'o stated: > Also, can you reproduce the problem with the nobarrier and > journal_async_commit options *removed*? Yes, I know you have battery > backup, but it would be interesting to see if the problem shows up in > the default configuration with none of the more specialist options. > (So it would probably be good to test with journal_checksum removed as > well.) I'm going to spend some time after work today trying to reproduce this in a virtual machine. If rebooting while umounting is truly all it takes, as it seems, this should eliminate a bunch of variables and make it a lot easier to reproduce. (Assuming Eric hasn't already done just that, that is.) -- NULL && (void)