Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753104Ab3EJJkP (ORCPT ); Fri, 10 May 2013 05:40:15 -0400 Received: from mail.skyhub.de ([78.46.96.112]:46579 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752240Ab3EJJkM (ORCPT ); Fri, 10 May 2013 05:40:12 -0400 Date: Fri, 10 May 2013 11:45:56 +0200 From: Borislav Petkov To: Ingo Molnar Cc: Frederic Weisbecker , Jiri Kosina , Tony Luck , linux-kernel@vger.kernel.org, x86@kernel.org Subject: Re: NOHZ: WARNING: at arch/x86/kernel/smp.c:123 native_smp_send_reschedule Message-ID: <20130510094556.GA23014@pd.tnic> References: <20130510002930.GB2394@somewhere> <20130510092811.GA22942@pd.tnic> <20130510093729.GA16487@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20130510093729.GA16487@gmail.com> 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 Content-Length: 681 Lines: 26 On Fri, May 10, 2013 at 11:37:29AM +0200, Ingo Molnar wrote: > The pattern I use in such cases is: > > if (WARN_ONCE(!cpu_online(cpu))) { > printk("%d %d\n", cpu, smp_processor_id()); > dump_stack(); > } Cool, and WARN_ONCE dumps stack already so: if (WARN_ONCE(!cpu_online(cpu))) printk("%d %d\n", cpu, smp_processor_id()); Nice. -- Regards/Gruss, Boris. Sent from a fat crate under my desk. Formatting is fine. -- -- 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/