From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from slow1-d.mail.gandi.net ([217.70.178.86]:37423 "EHLO slow1-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752995Ab3JUKht (ORCPT ); Mon, 21 Oct 2013 06:37:49 -0400 Date: Mon, 21 Oct 2013 12:37:31 +0200 From: Xavier Bassery To: david pu Cc: linux-btrfs@vger.kernel.org Subject: Re: task btrfs-transacti:1076 blocked for more than 120 seconds Message-ID: <20131021123731.4ea7a23e@renoir.lan> In-Reply-To: References: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Mon, 21 Oct 2013 16:36:41 +0800 david pu wrote: > hello, > I'm running into btrfs-transaction hang issue with below call trace > from dmesg[1]. > when this issue happens, all filesystem r/w access will be blocked and > no response in terminal. I'm using Ubuntu raring(linux 3.2 kernel) > 64bit kernel as below: > Linux dpu-e6410 3.2.0-36-generic #57-Ubuntu SMP Tue Jan 8 21:44:52 UTC > 2013 x86_64 x86_64 x86_64 GNU/Linux > > is it a known issue? How to recover from such task hung status? Hi David, a simple btrfs user reply here. I don't know if this will solve your issue at hand, but when using btrfs it is strongly advised to run a much more recent kernel than 3.2 as found in Ubuntu precise (12.4). The reason is that they were plenty of bug fixes related to btrfs that you would miss by sticking to an old kernel. Could you please try the latest 3.11 (or 3.10) kernel available? If this doesn't fix your issue, please report back so that we can investigate further. Regards, Xavier