From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from fgwmail.fujitsu.co.jp ([164.71.1.133]:52633 "EHLO fgwmail.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754046AbaFQCKp (ORCPT ); Mon, 16 Jun 2014 22:10:45 -0400 Received: from kw-mxq.gw.nic.fujitsu.com (unknown [10.0.237.131]) by fgwmail.fujitsu.co.jp (Postfix) with ESMTP id 19C6B3EE0C2 for ; Tue, 17 Jun 2014 11:10:44 +0900 (JST) Received: from s1.gw.fujitsu.co.jp (s1.gw.nic.fujitsu.com [10.0.50.91]) by kw-mxq.gw.nic.fujitsu.com (Postfix) with ESMTP id 25A17AC03D7 for ; Tue, 17 Jun 2014 11:10:43 +0900 (JST) Received: from m1001.s.css.fujitsu.com (m1001.s.css.fujitsu.com [10.240.81.139]) by s1.gw.fujitsu.co.jp (Postfix) with ESMTP id CC2611DB8050 for ; Tue, 17 Jun 2014 11:10:42 +0900 (JST) Message-ID: <539FA395.5050704@jp.fujitsu.com> Date: Tue, 17 Jun 2014 11:10:29 +0900 From: Tsutomu Itoh MIME-Version: 1.0 To: Chris Mason CC: Linux Btrfs Subject: Re: [3.16-rc1] BUG: soft lockup - CPU#0 stuck for 23s! [kworker/u25:4:5189] References: <539E9026.1020406@jp.fujitsu.com> <539F2FEA.1060809@fb.com> <539F7D8E.9010608@jp.fujitsu.com> <539F8351.3010700@fb.com> <539F846A.4080608@jp.fujitsu.com> <539F9006.4090109@fb.com> In-Reply-To: <539F9006.4090109@fb.com> Content-Type: text/plain; charset=ISO-2022-JP Sender: linux-btrfs-owner@vger.kernel.org List-ID: On 2014/06/17 9:47, Chris Mason wrote: > On 06/16/2014 07:57 PM, Tsutomu Itoh wrote: >> On 2014/06/17 8:52, Chris Mason wrote: >>> On 06/16/2014 07:28 PM, Tsutomu Itoh wrote: >>>> Hi Chris, >>>> >>>> On 2014/06/17 2:56, Chris Mason wrote: >>>>> On 06/16/2014 02:35 AM, Tsutomu Itoh wrote: >>>>>> I encountered soft lockup when executing 'xfstests btrfs/042' on 3.16-rc1. >>>>>> >>>>> >>>>> Did we recover, or was it stuck forever? >>>> >>>> The following messages are repeatedly output. >>>> And stuck forever. >>>> >>>> [ 1147.942181] BUG: soft lockup - CPU#0 stuck for 23s! [kworker/u25:4:5189] >>>> [ 1147.967175] BUG: soft lockup - CPU#3 stuck for 23s! [kworker/u25:9:5194] >>>> [ 1147.979172] BUG: soft lockup - CPU#4 stuck for 23s! [kworker/u25:15:5200] >>>> [ 1147.991169] BUG: soft lockup - CPU#5 stuck for 23s! [kworker/u25:7:5192] >>>> [ 1148.064153] BUG: soft lockup - CPU#6 stuck for 23s! [kworker/u26:3:3182] >>> >>> Can you please capture a stack trace from all the cpus? > > Very strange, please try to reproduce again, I'll dig through things here. I can reproduce it easily in my environment. Thanks, Tsutomu ========== Message from syslogd@luna at Jun 17 11:06:33 ... kernel:[ 560.076282] BUG: soft lockup - CPU#0 stuck for 22s! [kworker/u25:1:193] Message from syslogd@luna at Jun 17 11:06:33 ... kernel:[ 560.076283] BUG: soft lockup - CPU#1 stuck for 22s! [kworker/u25:3:3174] Message from syslogd@luna at Jun 17 11:06:33 ... kernel:[ 560.101276] BUG: soft lockup - CPU#3 stuck for 22s! [kworker/u25:4:3175] Message from syslogd@luna at Jun 17 11:06:33 ... kernel:[ 560.113274] BUG: soft lockup - CPU#4 stuck for 22s! [kworker/u25:6:3177] Message from syslogd@luna at Jun 17 11:06:33 ... kernel:[ 560.125271] BUG: soft lockup - CPU#5 stuck for 22s! [kworker/u25:5:3176]