From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265444AbTFWWdd (ORCPT ); Mon, 23 Jun 2003 18:33:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265474AbTFWWdd (ORCPT ); Mon, 23 Jun 2003 18:33:33 -0400 Received: from x35.xmailserver.org ([208.129.208.51]:62350 "EHLO x35.xmailserver.org") by vger.kernel.org with ESMTP id S265444AbTFWWd3 (ORCPT ); Mon, 23 Jun 2003 18:33:29 -0400 X-AuthUser: davidel@xmailserver.org Date: Mon, 23 Jun 2003 15:45:59 -0700 (PDT) From: Davide Libenzi X-X-Sender: davide@bigblue.dev.mcafeelabs.com To: Mikael Pettersson cc: Linus Torvalds , kaos@ocs.com.au, Linux Kernel Mailing List Subject: Re: [PATCH][2.5.73] enable local APIC on P4 In-Reply-To: <200306232229.h5NMTaJU013801@harpo.it.uu.se> Message-ID: References: <200306232229.h5NMTaJU013801@harpo.it.uu.se> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 24 Jun 2003, Mikael Pettersson wrote: > The current local APIC code refuses to enable the local APIC > on a P4 if the BIOS booted us with the local APIC disabled. > This patch removes this unnecessary restriction. Please apply. > > Most P4 machines do boot with the local APIC enabled, but > Keith Owens reported that the P4 based Compaq Evo N800v > disables the local APIC, even though the machine actually > works if Linux enables it. > > It is possible that some P4 machines with broken BIOSen > were saved by our refusal to enable the local APIC. We > can handle them via the DMI blacklist rules instead. I did the same thing on my Presario. BIOS disable it by default. - Davide