Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759678AbXI0WDR (ORCPT ); Thu, 27 Sep 2007 18:03:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753464AbXI0WDJ (ORCPT ); Thu, 27 Sep 2007 18:03:09 -0400 Received: from iriserv.iradimed.com ([72.242.190.170]:46554 "EHLO iradimed.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752044AbXI0WDI (ORCPT ); Thu, 27 Sep 2007 18:03:08 -0400 Message-ID: <46FC28A4.9080008@cfl.rr.com> Date: Thu, 27 Sep 2007 18:03:16 -0400 From: Phillip Susi User-Agent: Thunderbird 2.0.0.6 (Windows/20070728) MIME-Version: 1.0 To: Linux-kernel Subject: Re: Why do so many machines need "noapic"? References: <46DF3BFF.9000809@redhat.com> <20070915003906.5fa6dc0f.akpm@linux-foundation.org> <200709151258.28745.ioe-lkml@rameria.de> <20070915040802.bb3c7093.akpm@linux-foundation.org> <20070915120824.GA21243@srcf.ucam.org> <20070924213224.GI8127@redhat.com> In-Reply-To: <20070924213224.GI8127@redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 27 Sep 2007 22:03:23.0018 (UTC) FILETIME=[38B1C6A0:01C80152] X-TM-AS-Product-Ver: SMEX-7.5.0.1243-5.0.1023-15450.001 X-TM-AS-Result: No--14.276000-5.000000-31 X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1278 Lines: 35 Dave Jones wrote: > If memory serves correctly, that was circa 2.6.10, back in these commits.. > > commit a068ea13d1db406e15c346e93530343f6e70184c > Author: Len Brown > Date: Sun Oct 10 05:21:08 2004 -0400 > > [ACPI] If BIOS disabled the LAPIC, believe it by default. > "lapic" is available to force enabling the LAPIC > in the event you know more than your BIOS vendor. > http://bugzilla.kernel.org/show_bug.cgi?id=3238 > > commit 2fcfece90db9643b6f30a7ad343898a2871e6a81 > Author: Len Brown > Date: Sat Oct 9 20:12:45 2004 -0400 > > [ACPI] Don't enable LAPIC when the BIOS disabled it. > Doing so apparently breaks every Dell on Earth. > http://bugzilla.kernel.org/show_bug.cgi?id=3238 > > > But those changes relate to the local APIC, which 'noapic' shouldn't > have any effect on should it ? If the LAPIC is disabled, then you CAN'T use the IO-APIC right? So then wouldn't the noapic option have no effects since the apic is already disabled? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/