Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750943AbWCANji (ORCPT ); Wed, 1 Mar 2006 08:39:38 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750987AbWCANji (ORCPT ); Wed, 1 Mar 2006 08:39:38 -0500 Received: from mx1.redhat.com ([66.187.233.31]:21963 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S1750911AbWCANjh (ORCPT ); Wed, 1 Mar 2006 08:39:37 -0500 Date: Wed, 1 Mar 2006 08:39:13 -0500 From: Dave Jones To: Zwane Mwaikambo Cc: Michael Ellerman , "Darrick J. Wong" , linux-kernel@vger.kernel.org, Chris McDermott Subject: Re: [PATCH] leave APIC code inactive by default on i386 Message-ID: <20060301133913.GB16840@redhat.com> Mail-Followup-To: Dave Jones , Zwane Mwaikambo , Michael Ellerman , "Darrick J. Wong" , linux-kernel@vger.kernel.org, Chris McDermott References: <43D03AF0.3040703@us.ibm.com> <20060301043353.GJ28434@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1130 Lines: 27 On Tue, Feb 28, 2006 at 10:36:09PM -0800, Zwane Mwaikambo wrote: > > The number of systems that actually *need* APIC enabled are in the > > vast (though growing) minority, so it's unlikely that most newbies > > will hit this. The problem is also the inverse of what you describe. > > Typically the distros have DMI lists of machines that *need* APIC > > to make it enabled by default so everything 'just works'. > > > > The big problem the patch solves is allowing it to be possible > > to build a kernel with UP APIC code, but disabled by default > > (Because there a lot of older machines that die horribly if it > > was enabled by default). > > The current policy is off if it was disabled by the BIOS. Is the intention > of this patch to have it off unconditionally unless explicitely enabled by > kernel parameter? Yes, (or forced on by dmi string) Dave - 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/