From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762217AbYDUTot (ORCPT ); Mon, 21 Apr 2008 15:44:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761732AbYDUToi (ORCPT ); Mon, 21 Apr 2008 15:44:38 -0400 Received: from one.firstfloor.org ([213.235.205.2]:49980 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762073AbYDUToh (ORCPT ); Mon, 21 Apr 2008 15:44:37 -0400 Message-ID: <480CEEA2.1040106@firstfloor.org> Date: Mon, 21 Apr 2008 21:44:34 +0200 From: Andi Kleen User-Agent: Thunderbird 1.5.0.12 (X11/20060911) MIME-Version: 1.0 To: Pavel Machek CC: Jesse Barnes , linux-pci@atrey.karlin.mff.cuni.cz, Jean Delvare , LKML , Tejun Heo , Tom Long Nguyen , Randy Dunlap , Jeff Garzik Subject: Re: PCI MSI breaks when booting with nosmp References: <200804172140.02311.jdelvare@suse.de> <200804171308.37328.jbarnes@virtuousgeek.org> <200804172225.14373.jdelvare@suse.de> <200804211043.10410.jbarnes@virtuousgeek.org> <87d4oj6o9a.fsf@basil.nowhere.org> <20080421194336.GC32278@elf.ucw.cz> In-Reply-To: <20080421194336.GC32278@elf.ucw.cz> 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 Pavel Machek wrote: > On Mon 2008-04-21 20:45:05, Andi Kleen wrote: >> 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. > > Are you sure? I still boot DOS on very recent boxes, and they seem to > work. How can PC-compatible machine require an APIC? The machine doesn't, but the drivers do. DOS likely doesn't use all hardware. -Andi