From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754526AbZELSg2 (ORCPT ); Tue, 12 May 2009 14:36:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754178AbZELSf5 (ORCPT ); Tue, 12 May 2009 14:35:57 -0400 Received: from hera.kernel.org ([140.211.167.34]:45356 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752147AbZELSf4 (ORCPT ); Tue, 12 May 2009 14:35:56 -0400 Message-ID: <4A09C157.7010407@kernel.org> Date: Tue, 12 May 2009 11:35:03 -0700 From: Yinghai Lu User-Agent: Thunderbird 2.0.0.19 (X11/20081227) MIME-Version: 1.0 To: Ingo Molnar 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 References: <49FC85A9.2070702@kernel.org> <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> In-Reply-To: <20090512183302.GA4000@elte.hu> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. YH