From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932487Ab2C1L22 (ORCPT ); Wed, 28 Mar 2012 07:28:28 -0400 Received: from mail2.charite.de ([141.42.206.200]:36505 "EHLO mail2.charite.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932383Ab2C1L20 (ORCPT ); Wed, 28 Mar 2012 07:28:26 -0400 Date: Wed, 28 Mar 2012 13:28:22 +0200 From: Ralf Hildebrandt To: linux-kernel@vger.kernel.org Subject: Re: 3.3.0: "INFO: rcu_bh detected stall on CPU 3 (t=0 jiffies)" Message-ID: <20120328112822.GH16671@charite.de> Mail-Followup-To: linux-kernel@vger.kernel.org References: <20120327141536.GP25457@charite.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20120327141536.GP25457@charite.de> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Ralf Hildebrandt : > > Mar 23 11:54:00 mail kernel: > Mar 23 11:54:00 mail kernel: [347213.025005] INFO: rcu_bh detected stall on CPU 3 (t=0 jiffies) > Mar 23 11:54:00 mail kernel: [347213.025005] Pid: 12654, comm: cleanup Not tainted 3.3.0 #1 > Mar 23 11:54:00 mail kernel: [347213.025005] Call Trace: > Mar 23 11:54:00 mail kernel: [347213.025005] [] ? __rcu_pending+0x10a/0x311 > Mar 23 11:54:00 mail kernel: [347213.025005] [] ? rcu_check_callbacks+0x9b/0xa1 > Mar 23 11:54:00 mail kernel: [347213.025005] [] ? update_process_times+0x2a/0x53 > Mar 23 11:54:00 mail kernel: [347213.025005] [] ? tick_sched_timer+0x4f/0x90 > Mar 23 11:54:00 mail kernel: [347213.025005] [] ? __remove_hrtimer+0x25/0x79 > Mar 23 11:54:00 mail kernel: [347213.025005] [] ? __run_hrtimer.isra.32+0x38/0xbe > Mar 23 11:54:00 mail kernel: [347213.025005] [] ? hrtimer_interrupt+0xda/0x23d > Mar 23 11:54:00 mail kernel: [347213.025005] [] ? smp_apic_timer_interrupt+0x4c/0x81 > Mar 23 11:54:00 mail kernel: [347213.025005] [] ? apic_timer_interrupt+0x31/0x38 I read http://www.kernel.org/doc/Documentation/RCU/stallwarn.txt but couldn't find "rcu_bh detected stall" being mentioned there. I reported the same issue on 3.2.9 (same machine!) on the 13th of march: Mar 12 12:58:38 mail kernel: [440746.244002] INFO: rcu_bh detected stall on CPU 2 (t=0 jiffies) Mar 12 12:58:38 mail kernel: [440746.244002] Pid: 27980, comm: /usr/sbin/amavi Tainted: G W 3.2.9 #1 Mar 12 12:58:38 mail kernel: [440746.244002] Call Trace: Mar 12 12:58:38 mail kernel: [440746.244002] [] ? __rcu_pending+0x10a/0x30e Mar 12 12:58:38 mail kernel: [440746.244002] [] ? rcu_check_callbacks+0xd4/0xde Mar 12 12:58:38 mail kernel: [440746.244002] [] ? update_process_times+0x2a/0x53 Mar 12 12:58:38 mail kernel: [440746.244002] [] ? tick_sched_timer+0x4d/0x8e Mar 12 12:58:38 mail kernel: [440746.244002] [] ? __remove_hrtimer+0x25/0x79 Mar 12 12:58:38 mail kernel: [440746.244002] [] ? __run_hrtimer.isra.32+0x37/0xbd Mar 12 12:58:38 mail kernel: [440746.244002] [] ? hrtimer_interrupt+0xdb/0x23d Mar 12 12:58:38 mail kernel: [440746.244002] [] ? vmalloc_sync_all+0x1/0x1 Mar 12 12:58:38 mail kernel: [440746.244002] [] ? smp_apic_timer_interrupt+0x4c/0x81 Mar 12 12:58:38 mail kernel: [440746.244002] [] ? apic_timer_interrupt+0x31/0x38 Mar 12 12:58:38 mail kernel: [440746.244002] [] ? vmalloc_sync_all+0x1/0x1 Mar 12 12:58:38 mail kernel: [440746.244002] [] ? do_page_fault+0x141/0x38f Mar 12 12:58:38 mail kernel: [440746.244002] [] ? irq_exit+0x34/0x87 Mar 12 12:58:38 mail kernel: [440746.244002] [] ? smp_apic_timer_interrupt+0x51/0x81 Mar 12 12:58:38 mail kernel: [440746.244002] [] ? vmalloc_sync_all+0x1/0x1 Mar 12 12:58:38 mail kernel: [440746.244002] [] ? error_code+0x67/0x6c and so did Tilman Schmidt in February: https://lkml.org/lkml/2012/2/18/34 -- Ralf Hildebrandt Charite Universitätsmedizin Berlin ralf.hildebrandt@charite.de Campus Benjamin Franklin http://www.charite.de Hindenburgdamm 30, 12203 Berlin Geschäftsbereich IT, Abt. Netzwerk fon: +49-30-450.570.155