From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from syrinx.knorrie.org ([82.94.188.77]:55393 "EHLO syrinx.knorrie.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932081AbcGBReP (ORCPT ); Sat, 2 Jul 2016 13:34:15 -0400 Received: from [IPv6:2001:980:4a41:fb::12] (unknown [IPv6:2001:980:4a41:fb::12]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by syrinx.knorrie.org (Postfix) with ESMTPSA id DA0E0600E8 for ; Sat, 2 Jul 2016 19:34:11 +0200 (CEST) Subject: Re: Filesystem locks up, also with older kernel on any action after booting into 4.7-rc4 once To: linux-btrfs References: <472f47d4-b6c9-072d-3fe4-a1ec2af141c7@mendix.com> From: Hans van Kranenburg Message-ID: Date: Sat, 2 Jul 2016 19:34:11 +0200 MIME-Version: 1.0 In-Reply-To: <472f47d4-b6c9-072d-3fe4-a1ec2af141c7@mendix.com> Content-Type: text/plain; charset=utf-8; format=flowed Sender: linux-btrfs-owner@vger.kernel.org List-ID: On 07/02/2016 07:14 PM, Hans van Kranenburg wrote: > I just rebooted a VM into a 4.7 kernel. The joy didn't last long. After > 177 seconds the btrfs data partition (root is on ext4) locked up. Worse, > it keeps locking up on any action performed even when rebooting it with > older kernels again. D: The filesystem initially mounts fine, but then > locks up again immediately. > > Linux stacheldraht 4.7.0-rc4-amd64 #1 SMP Debian 4.7~rc4-1~exp1 > (2016-06-20) x86_64 GNU/Linux > > ps output shows [btrfs-transaction] in D state: > > root 1108 0.0 0.0 0 0 ? D 17:42 0:00 \_ > [btrfs-transacti] > > From dmesg: > > [blah blah blah] > > So, something happened inside the fs that makes it lock up every time I > try to do anything with it... I force-rebooted the poor thing again, and mounted the filesystem ro. It mounts without any complaint. I can see all files now, I can do sub list etc... So I think I'm going to copy some data to a new filesystem on a new block device just in case. The thing has to move to new storage anyway it's about 100 subvolumes with about 150GB of data, so that's a nice excercise with send/receive. -- Hans van Kranenburg - System / Network Engineer T +31 (0)10 2760434 | hans.van.kranenburg@mendix.com | www.mendix.com