From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932165AbWGXNUv (ORCPT ); Mon, 24 Jul 2006 09:20:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932173AbWGXNUu (ORCPT ); Mon, 24 Jul 2006 09:20:50 -0400 Received: from ms-smtp-04.nyroc.rr.com ([24.24.2.58]:57044 "EHLO ms-smtp-04.nyroc.rr.com") by vger.kernel.org with ESMTP id S932165AbWGXNUt (ORCPT ); Mon, 24 Jul 2006 09:20:49 -0400 Subject: Re: BUG: soft lockup detected on CPU#1! From: Steven Rostedt To: Jochen Heuer Cc: linux-kernel@vger.kernel.org, Ingo Molnar , nathans@sgi.com, xfs@oss.sgi.com In-Reply-To: <20060721225304.GA12184@planetzork.ping.de> References: <20060717125216.GA15481@planetzork.ping.de> <1153146608.1218.9.camel@localhost.localdomain> <20060717144831.GA28284@planetzork.ping.de> <20060721225304.GA12184@planetzork.ping.de> Content-Type: text/plain Date: Mon, 24 Jul 2006 09:20:32 -0400 Message-Id: <1153747232.4002.81.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.6.2 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 2006-07-22 at 00:53 +0200, Jochen Heuer wrote: > > Is there anything I can test? Disable irq balancing? Disabling preemption did > not help. Disabling IO-APIC? What can I do to help isolate the problem because > it really is annoying and I don't like pushing the reset button. Because if the > system locks up *really* nothing works. The screen is frozen, no mouse, no > keyboard, no sys-rq, no network ... nothing. Jochen, have you tried to enable NMI? Make sure you have Local APIC enabled (you should since it's SMP), and on your kernel command line (in Grub) add "lapic nmi_watchdog=2". (lapic isn't really needed, but I always add it so I don't forget to when working on UP machines). Run it again, and if it locks up hard, which probably means its spinning somewhere with interrupts disabled, the NMI will trigger and should give you another dump of where it's locked up. -- Steve