From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Priebe Subject: bcache deadlock Date: Sat, 1 Aug 2015 08:08:40 +0200 Message-ID: <55BC6268.3060407@profihost.ag> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-ph.de-nserver.de ([85.158.179.214]:18522 "EHLO mail-ph.de-nserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751054AbbHAGIh (ORCPT ); Sat, 1 Aug 2015 02:08:37 -0400 Sender: linux-bcache-owner@vger.kernel.org List-Id: linux-bcache@vger.kernel.org To: "linux-bcache@vger.kernel.org" Hi, any ideas about this deadlock: 2015-08-01 00:05:05 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 2015-08-01 00:05:05 Tainted: G O 3.18.19+47-ph #1 2015-08-01 00:05:05 INFO: task xfsaild/bcache5:2437 blocked for more than 120 seconds. 2015-08-01 00:05:05 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 2015-08-01 00:05:05 Tainted: G O 3.18.19+47-ph #1 2015-08-01 00:05:05 INFO: task xfsaild/bcache4:2433 blocked for more than 120 seconds. 2015-08-01 00:05:05 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 2015-08-01 00:05:05 Tainted: G O 3.18.19+47-ph #1 2015-08-01 00:05:05 INFO: task bcache_writebac:683 blocked for more than 120 seconds. 2015-08-01 00:05:05 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 2015-08-01 00:05:05 Tainted: G O 3.18.19+47-ph #1 2015-08-01 00:05:05 INFO: task bcache_writebac:679 blocked for more than 120 seconds. 2015-08-01 00:05:05 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 2015-08-01 00:05:05 Tainted: G O 3.18.19+47-ph #1 2015-08-01 00:05:05 INFO: task bcache_writebac:675 blocked for more than 120 seconds. 2015-08-01 00:05:05 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 2015-08-01 00:05:05 Tainted: G O 3.18.19+47-ph #1 2015-08-01 00:05:05 INFO: task bcache_writebac:671 blocked for more than 120 seconds. 2015-08-01 00:05:05 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 2015-08-01 00:05:05 Tainted: G O 3.18.19+47-ph #1 2015-08-01 00:05:05 INFO: task bcache_writebac:667 blocked for more than 120 seconds. 2015-08-01 00:05:05 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 2015-08-01 00:05:05 Tainted: G O 3.18.19+47-ph #1 2015-08-01 00:05:05 INFO: task bcache_writebac:654 blocked for more than 120 seconds. 2015-08-01 00:05:05 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 2015-08-01 00:05:05 Tainted: G O 3.18.19+47-ph #1 2015-08-01 00:05:05 INFO: task kswapd0:79 blocked for more than 120 seconds. 2015-08-01 00:05:05 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 2015-08-01 00:05:05 Tainted: G O 3.18.19+47-ph #1 2015-08-01 00:05:05 INFO: task kthreadd:2 blocked for more than 120 seconds. Stefan