From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zheng Liu Subject: Re: kernel panic using external journal and snapshots Date: Mon, 25 Nov 2013 11:32:16 +0800 Message-ID: <20131125033216.GA20772@gmail.com> References: <5281A8A3.80604@gmail.com> <20131122071145.GA5936@gmail.com> <52911078.40207@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-ext4@vger.kernel.org To: Gordon Messmer Return-path: Received: from mail-pd0-f178.google.com ([209.85.192.178]:36587 "EHLO mail-pd0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753431Ab3KYD32 (ORCPT ); Sun, 24 Nov 2013 22:29:28 -0500 Received: by mail-pd0-f178.google.com with SMTP id y10so4612857pdj.9 for ; Sun, 24 Nov 2013 19:29:28 -0800 (PST) Content-Disposition: inline In-Reply-To: <52911078.40207@gmail.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Sat, Nov 23, 2013 at 12:30:48PM -0800, Gordon Messmer wrote: > On 11/21/2013 11:11 PM, Zheng Liu wrote: > >For the first question, I haven't a LVM device on my hand. Hence I am > >not sure whether there is a bug or not. > > > >For the second one, I do a test on my sand box against Linux-3.12-rc5, > >and it works well. So I think maybe you can try it again on a newer > >kernel. > > The problem manifests when a filesystem which uses external journal > and its snapshot are simultaneously mounted. If you don't have an > LVM device with which to create a snapshot, I'm not sure what you're > testing. Could you clarify? Ah, sorry, I don't clarify my test. I just split two partitions on a hard disk and create a ext4 file system with external journal. Then I use tune2fs with '-O ^has_journal' to remove external journal. After that I try to mount this file system on 3.12-rc5, and it work well. That's all I have done. Thanks, - Zheng