From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758472AbYDUSpr (ORCPT ); Mon, 21 Apr 2008 14:45:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753696AbYDUSpj (ORCPT ); Mon, 21 Apr 2008 14:45:39 -0400 Received: from smtp-out01.alice-dsl.net ([88.44.60.11]:47388 "EHLO smtp-out01.alice-dsl.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752998AbYDUSpi (ORCPT ); Mon, 21 Apr 2008 14:45:38 -0400 To: Jesse Barnes Cc: linux-pci@atrey.karlin.mff.cuni.cz, Jean Delvare , LKML , Pavel Machek , Tejun Heo , Tom Long Nguyen , Randy Dunlap , Jeff Garzik Subject: Re: PCI MSI breaks when booting with nosmp From: Andi Kleen References: <200804172140.02311.jdelvare@suse.de> <200804171308.37328.jbarnes@virtuousgeek.org> <200804172225.14373.jdelvare@suse.de> <200804211043.10410.jbarnes@virtuousgeek.org> Date: Mon, 21 Apr 2008 20:45:05 +0200 In-Reply-To: <200804211043.10410.jbarnes@virtuousgeek.org> (Jesse Barnes's message of "Mon, 21 Apr 2008 10:43:10 -0700") Message-ID: <87d4oj6o9a.fsf@basil.nowhere.org> User-Agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/21.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-OriginalArrivalTime: 21 Apr 2008 18:38:16.0620 (UTC) FILETIME=[DD04B6C0:01C8A3DE] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Jesse Barnes writes: > > Ok, I see this too on my desktop machine. It looks like we're not getting > interrupts setup correctly in the nosmp case. Still digging through to see > why though... NoSMP disables the io-apic and a lot of modern systems don't work without APIC. If you just want to run with a single cpu for testing etc. always use maxcpus=1 (not 0, that will disable the APIC too) -Andi