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Date: Mon, 16 Jun 2014 19:52:49 -0400
From: Chris Mason <clm@fb.com>
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To: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
CC: Linux Btrfs <linux-btrfs@vger.kernel.org>
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>
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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?

-chris