Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750922AbWCFRSM (ORCPT ); Mon, 6 Mar 2006 12:18:12 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751083AbWCFRSM (ORCPT ); Mon, 6 Mar 2006 12:18:12 -0500 Received: from mx1.redhat.com ([66.187.233.31]:5027 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S1750922AbWCFRSM (ORCPT ); Mon, 6 Mar 2006 12:18:12 -0500 Date: Mon, 6 Mar 2006 12:17:47 -0500 From: Dave Jones To: Pavel Machek 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: <20060306171747.GN21445@redhat.com> Mail-Followup-To: Dave Jones , Pavel Machek , Michael Ellerman , "Darrick J. Wong" , linux-kernel@vger.kernel.org, Chris McDermott References: <43D03AF0.3040703@us.ibm.com> <20060301043353.GJ28434@redhat.com> <20060306125018.GA1673@elf.ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060306125018.GA1673@elf.ucw.cz> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1203 Lines: 30 On Mon, Mar 06, 2006 at 01:50:18PM +0100, Pavel Machek 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'. > > Well, blacklisting "new" machines is a problem -- their number > grows. Would not it be better to blacklist machines broken by APIC > ("old" ones, presumably)? It would. Though some new machines also falsely advertise it as working aparently. I heard a report of a thinkpad going boom last week. > Is adding "noapic nolapic" to default command line a big problem? For end-users, yes. People want things to 'just work', not have to find arcane commands to type in to make things work. Dave -- http://www.codemonkey.org.uk - 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/