From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755434AbZELTG0 (ORCPT ); Tue, 12 May 2009 15:06:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751531AbZELTGP (ORCPT ); Tue, 12 May 2009 15:06:15 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:53716 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751377AbZELTGO (ORCPT ); Tue, 12 May 2009 15:06:14 -0400 Date: Tue, 12 May 2009 21:05:38 +0200 From: Ingo Molnar To: Yinghai Lu Cc: Cyrill Gorcunov , mingo@redhat.com, hpa@zytor.com, linux-kernel@vger.kernel.org, tglx@linutronix.de, eswierk@aristanetworks.com, linux-tip-commits@vger.kernel.org Subject: Re: [tip:irq/numa] x86: read apic ID in the !acpi_lapic case Message-ID: <20090512190538.GA9769@elte.hu> References: <20090512112205.GA12108@elte.hu> <20090512145128.GA10220@lenovo> <20090512145808.GA20587@elte.hu> <4A099013.6040708@kernel.org> <20090512150631.GA32067@elte.hu> <20090512164617.GA21673@elte.hu> <4A09C068.3010308@kernel.org> <20090512183302.GA4000@elte.hu> <4A09C157.7010407@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4A09C157.7010407@kernel.org> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Yinghai Lu wrote: > Ingo Molnar wrote: > > * Yinghai Lu wrote: > > > >> Ingo Molnar wrote: > >>> got this on a testbox: > >>> > >>> [ 0.113333] WARNING: at arch/x86/kernel/apic/apic.c:253 warn_slowpath_null+0x28/0x50() > >>> > >>> Ingo > >>> > >>> [ 0.000000] Initializing cgroup subsys cpuset > >>> [ 0.000000] Linux version 2.6.30-rc5-tip-01553-g4bc9bac-dirty (mingo@sirius) (gcc version 4.3.2 20081105 (Red Hat 4.3.2-7) (GCC) ) #48764 SMP PREEMPT Tue May 12 18:30:18 CEST 2009 > >>> [ 0.000000] Command line: root=/dev/sda1 earlyprintk=serial,ttyS0,115200 console=ttyS0,115200 console=tty debug initcall_debug apic=verbose sysrq_always_enabled 5 ignore_loglevel nosmp no_hz=off highres=0 nmi_watchdog=0 noapic nolapic_timer hpet=disable idle=poll notsc acpi=off > >> you should use > >> nolapic and noapic_timer > >> > >> /* same as disableapic, for compatibility */ > >> static int __init setup_nolapic(char *arg) > >> { > >> return setup_disableapic(arg); > >> } > >> early_param("nolapic", setup_nolapic); > >> > >> static int __init parse_disable_apic_timer(char *arg) > >> { > >> disable_apic_timer = 1; > >> return 0; > >> } > >> early_param("noapictimer", parse_disable_apic_timer); > > > > What do you mean? This warning never triggered before on this > > test-box. This is a plain regression. > > just a reminder: that in your command there are some typo: should > use nolapic and noapic_timer. ah, ok - indeed. But that is irrelevant to the bugreport. Ingo