From: Tom H Subject: kernel: BUG: soft lockup - CPU#5 stuck for 11s! [nfsd:20540] Date: Sat, 24 Jul 2010 16:58:09 +0100 Message-ID: <4C4B0D91.3080207@limepepper.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed To: linux-nfs@vger.kernel.org Return-path: Received: from april.london.02.net ([87.194.255.143]:39160 "EHLO april.london.02.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754619Ab0GXP6S (ORCPT ); Sat, 24 Jul 2010 11:58:18 -0400 Received: from [192.168.1.64] (87.194.12.203) by april.london.02.net (8.5.124.03) id 4C1F983E00F70E29 for linux-nfs@vger.kernel.org; Sat, 24 Jul 2010 16:58:16 +0100 Sender: linux-nfs-owner@vger.kernel.org List-ID: Hi, Has anyone any suggesions on what these messages might mean; # grep BUG /var/log/messages* /var/log/messages:Jul 23 03:18:21 server111 kernel: BUG: soft lockup - CPU#5 stuck for 11s! [nfsd:20540] /var/log/messages:Jul 23 03:22:09 server111 kernel: BUG: soft lockup - CPU#1 stuck for 15s! [nfsd:20545] /var/log/messages:Jul 23 03:24:21 server111 kernel: BUG: soft lockup - CPU#1 stuck for 24s! [nfsd:20546] There were associated with a period of high load and poor performance on the NFS server. Thanks Tom there were quite a few more... /var/log/messages:Jul 23 03:29:17 server111 kernel: BUG: soft lockup - CPU#2 stuck for 14s! [nfsd:20552] /var/log/messages:Jul 23 03:30:38 server111 kernel: BUG: soft lockup - CPU#6 stuck for 10s! [nfsd:20544] /var/log/messages:Jul 23 03:30:58 server111 kernel: BUG: soft lockup - CPU#6 stuck for 12s! [nfsd:20540] /var/log/messages:Jul 23 03:31:22 server111 kernel: BUG: soft lockup - CPU#3 stuck for 23s! [nfsd:20545] /var/log/messages:Jul 23 03:31:33 server111 kernel: BUG: soft lockup - CPU#6 stuck for 10s! [nfsd:20549] /var/log/messages:Jul 23 03:31:43 server111 kernel: BUG: soft lockup - CPU#5 stuck for 10s! [nfsd:20541] /var/log/messages:Jul 23 03:32:30 server111 kernel: BUG: soft lockup - CPU#7 stuck for 20s! [nfsd:20548] /var/log/messages:Jul 23 03:35:14 server111 kernel: BUG: soft lockup - CPU#1 stuck for 13s! [nfsd:20541] /var/log/messages:Jul 23 03:37:12 server111 kernel: BUG: soft lockup - CPU#3 stuck for 11s! [nfsd:20541] /var/log/messages:Jul 23 03:39:41 server111 kernel: BUG: soft lockup - CPU#5 stuck for 10s! [nfsd:20540] /var/log/messages:Jul 23 03:42:21 server111 kernel: BUG: soft lockup - CPU#3 stuck for 10s! [nfsd:20549] /var/log/messages:Jul 23 03:42:51 server111 kernel: BUG: soft lockup - CPU#1 stuck for 17s! [nfsd:20542] /var/log/messages:Jul 23 03:43:07 server111 kernel: BUG: soft lockup - CPU#3 stuck for 15s! [nfsd:20553] /var/log/messages:Jul 23 03:47:49 server111 kernel: BUG: soft lockup - CPU#7 stuck for 16s! [nfsd:20545] /var/log/messages:Jul 23 03:48:22 server111 kernel: BUG: soft lockup - CPU#1 stuck for 23s! [nfsd:20547]