Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751926AbWCAWrl (ORCPT ); Wed, 1 Mar 2006 17:47:41 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751929AbWCAWrl (ORCPT ); Wed, 1 Mar 2006 17:47:41 -0500 Received: from e33.co.us.ibm.com ([32.97.110.151]:48001 "EHLO e33.co.us.ibm.com") by vger.kernel.org with ESMTP id S1751926AbWCAWrk (ORCPT ); Wed, 1 Mar 2006 17:47:40 -0500 Subject: Re: [PATCH] leave APIC code inactive by default on i386 From: "Darrick J. Wong" Reply-To: "Darrick J. Wong" To: Dave Jones Cc: Michael Ellerman , linux-kernel@vger.kernel.org, Chris McDermott In-Reply-To: <20060301221404.GA1440@redhat.com> References: <43D03AF0.3040703@us.ibm.com> <20060301043353.GJ28434@redhat.com> <1141248546.30185.44.camel@localhost.localdomain> <20060301221404.GA1440@redhat.com> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-eu/xchPdNV4N2bsSPPCV" Date: Wed, 01 Mar 2006 14:47:38 -0800 Message-Id: <1141253258.30185.60.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.5.91 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1432 Lines: 41 --=-eu/xchPdNV4N2bsSPPCV Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Wed, 2006-03-01 at 17:14 -0500, Dave Jones wrote: > In light of Matthew's comments in this thread though, I'm also wondering > if we can now get by without this diff, and just enable it by default now > that the kernel respects that the BIOS and leaves it alone if it's been > disabled. Actually, it seems that there are Lenovo ThinkCenter P4 machines with buggy BIOSes that tell us that we can enable the APIC ... but doing so eventually causes the system to hang. Granted, the Google-recommended fixes are "noapic" or "Update the BIOS", but perhaps it would be best to leave it off _except_ for the few cases where we know that we need it. (Then again, the correct solution in this case is to fix the BIOS...) --D --=-eu/xchPdNV4N2bsSPPCV Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.1 (GNU/Linux) iD8DBQBEBiSKa6vRYYgWQuURAkVtAJkBNLWJHVQXaHRYZkwzo0BzwIo1WACfetHX M4DCKYRzUONKBilZB3evd2s= =yVwg -----END PGP SIGNATURE----- --=-eu/xchPdNV4N2bsSPPCV-- - 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/