Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758741AbYCAO3W (ORCPT ); Sat, 1 Mar 2008 09:29:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753033AbYCAO3O (ORCPT ); Sat, 1 Mar 2008 09:29:14 -0500 Received: from www.tglx.de ([62.245.132.106]:40310 "EHLO www.tglx.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752363AbYCAO3N (ORCPT ); Sat, 1 Mar 2008 09:29:13 -0500 Date: Sat, 1 Mar 2008 15:29:03 +0100 (CET) From: Thomas Gleixner To: Ed Tomlinson cc: linux-kernel@vger.kernel.org Subject: Re: Panic 2.6.24-3 NMI Watchdog detected LOCKUP on CPU 0 In-Reply-To: <200803010911.04569.edt@aei.ca> Message-ID: References: <200803010911.04569.edt@aei.ca> User-Agent: Alpine 1.00 (LFD 882 2007-12-20) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1380 Lines: 45 On Sat, 1 Mar 2008, Ed Tomlinson wrote: > Hi, > > I have been seeing these since I installed .24 kernels. It does not seem to matter if I change the clocksource from tsc > to apci_pm. Its happened with all .24 kernels I have tried starting with stock 2.6.24 upto 2.6.24-gentoo-r2 + 2.6.24-3 > > Ideas? Questions first. Is there a particular reason to use idle=poll ? Idea: does the patch below help ? Thanks, tglx --- arch/x86/kernel/process_64.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) Index: linux-2.6.24/arch/x86/kernel/process_64.c =================================================================== --- linux-2.6.24.orig/arch/x86/kernel/process_64.c +++ linux-2.6.24/arch/x86/kernel/process_64.c @@ -212,14 +212,13 @@ void cpu_idle (void) current_thread_info()->status |= TS_POLLING; /* endless idle loop with no priority at all */ while (1) { + tick_nohz_stop_sched_tick(); while (!need_resched()) { void (*idle)(void); if (__get_cpu_var(cpu_idle_state)) __get_cpu_var(cpu_idle_state) = 0; - tick_nohz_stop_sched_tick(); - rmb(); idle = pm_idle; if (!idle) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/