From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ross Anderson Subject: Re: bcache_gc: BUG: soft lockup - CPU#4 stuck for 22s! Date: Fri, 12 Sep 2014 12:51:15 -0500 Message-ID: <54133293.3000901@dsotm.net> References: <54127040.7090309@profihost.ag> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from smtprelay0113.b.hostedemail.com ([64.98.42.113]:53319 "EHLO smtprelay.b.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751150AbaILR62 (ORCPT ); Fri, 12 Sep 2014 13:58:28 -0400 Received: from smtprelay.b.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by smtpgrave05.b.hostedemail.com (Postfix) with ESMTP id 9B7292B2E6D for ; Fri, 12 Sep 2014 17:51:18 +0000 (UTC) In-Reply-To: <54127040.7090309@profihost.ag> Sender: linux-bcache-owner@vger.kernel.org List-Id: linux-bcache@vger.kernel.org To: Stefan Priebe , "linux-bcache@vger.kernel.org" Greetings, This was supposed to be corrected in the 3.17 push. I haven't seen it on my systems over the past few weeks of testing. Can you provide more details what was running when this occurred? What FS, hardware etc. Ross Anderson On 9/11/2014 11:02 PM, Stefan Priebe wrote: > Hi, > > while trying to use bcache on 3.17-rc4 i got those messages and a load > of 1000. > > Is this a known problem? > > 14-09-12 02:32:22 BUG: soft lockup - CPU#4 stuck for 23s! > [bcache_gc:1585] > 2014-09-12 02:31:54 INFO: rcu_sched self-detected stall on CPU { > 4} (t=150009 jiffies g=1762124 c=1762123 q=235323) > 2014-09-12 02:31:42 BUG: soft lockup - CPU#4 stuck for 22s! > [bcache_gc:1585] > 2014-09-12 02:31:14 BUG: soft lockup - CPU#4 stuck for 22s! > [bcache_gc:1585] > 2014-09-12 02:30:46 BUG: soft lockup - CPU#4 stuck for 22s! > [bcache_gc:1585] > 2014-09-12 02:30:18 BUG: soft lockup - CPU#4 stuck for 22s! > [bcache_gc:1585] > 2014-09-12 02:29:50 BUG: soft lockup - CPU#4 stuck for 22s! > [bcache_gc:1585] > 2014-09-12 02:29:22 BUG: soft lockup - CPU#4 stuck for 23s! > [bcache_gc:1585] > 2014-09-12 02:28:54 INFO: rcu_sched self-detected stall on CPU { > 4} (t=105006 jiffies g=1762124 c=1762123 q=209365) > 2014-09-12 02:28:42 BUG: soft lockup - CPU#4 stuck for 23s! > [bcache_gc:1585] > 2014-09-12 02:28:14 BUG: soft lockup - CPU#4 stuck for 22s! > [bcache_gc:1585] > 2014-09-12 02:27:46 BUG: soft lockup - CPU#4 stuck for 22s! > [bcache_gc:1585] > 2014-09-12 02:27:18 BUG: soft lockup - CPU#4 stuck for 22s! > [bcache_gc:1585] > 2014-09-12 02:26:50 BUG: soft lockup - CPU#4 stuck for 22s! > [bcache_gc:1585] > 2014-09-12 02:26:22 BUG: soft lockup - CPU#4 stuck for 22s! > [bcache_gc:1585] > 2014-09-12 02:25:54 INFO: rcu_sched self-detected stall on CPU { > 4} (t=60003 jiffies g=1762124 c=1762123 q=136221) > 2014-09-12 02:25:42 BUG: soft lockup - CPU#4 stuck for 23s! > [bcache_gc:1585] > 2014-09-12 02:25:14 BUG: soft lockup - CPU#4 stuck for 23s! > [bcache_gc:1585] > 2014-09-12 02:24:46 BUG: soft lockup - CPU#4 stuck for 23s! > [bcache_gc:1585] > > > Stefan > -- > To unsubscribe from this list: send the line "unsubscribe > linux-bcache" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html