From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753903AbZAIRA2 (ORCPT ); Fri, 9 Jan 2009 12:00:28 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751599AbZAIRAV (ORCPT ); Fri, 9 Jan 2009 12:00:21 -0500 Received: from vpn.id2.novell.com ([195.33.99.129]:30934 "EHLO vpn.id2.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751433AbZAIRAU convert rfc822-to-8bit (ORCPT ); Fri, 9 Jan 2009 12:00:20 -0500 Message-Id: <496790D1.76E4.0078.0@novell.com> X-Mailer: Novell GroupWise Internet Agent 8.0.0 Date: Fri, 09 Jan 2009 17:00:49 +0000 From: "Jan Beulich" To: , , Cc: Subject: x86: meaning of nolapic command line option Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8BIT Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Shouldn't that option imply that all APIC related activity, including that relating to IO-APICs or PCI MSI, should be circumvented? I'm finding that MSI must be disabled separately, and while most of the IO-APIC stuff is indeed not happening, acpi_get_override_irq() only checks skip_ioapic_setup, but that doesn't normally set without the noapic command line option. Is there any reason pci_no_msi() and disable_ioapic_setup() shouldn't be called when !cpu_has_apic at the end of identify_cpu()? Thanks, Jan