Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262375AbTIHPGT (ORCPT ); Mon, 8 Sep 2003 11:06:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262378AbTIHPGT (ORCPT ); Mon, 8 Sep 2003 11:06:19 -0400 Received: from delta.ds2.pg.gda.pl ([213.192.72.1]:50097 "EHLO delta.ds2.pg.gda.pl") by vger.kernel.org with ESMTP id S262375AbTIHPGS (ORCPT ); Mon, 8 Sep 2003 11:06:18 -0400 Date: Mon, 8 Sep 2003 17:06:11 +0200 (MET DST) From: "Maciej W. Rozycki" To: Mikael Pettersson cc: linux-kernel@vger.kernel.org, mathieu.desnoyers@polymtl.ca, mingo@redhat.com Subject: Re: PROBLEM: APIC on a Pentium Classic SMP, kernel 2.4.21-pre5 to 2.4.23-pre3 In-Reply-To: <200309080933.h889X06U011447@harpo.it.uu.se> Message-ID: Organization: Technical University of Gdansk 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 Content-Length: 1471 Lines: 33 On Mon, 8 Sep 2003, Mikael Pettersson wrote: > >IRQ problems with APIC enabled on a Neptune chipset, Pentium 90 SMP. > > > >Description > > > >Since kernel 2.4.21-pre2, IRQ problems are present on my Pentium 90 SMP, wi= > >th > >APIC enabled. It works well with 2.4.20 with APIC enabled, or with newer > >kernels with "noapic" kernel option. > > There were a lot of I/O-APIC & MP table parsing changes in 2.4.21 > for clustered apic. Chances are something there broke on your > ancient BIOS & mobo. I can't immediately see anything obviously > broken in 2.4.21: you'll have to identify the first pre-patch where > things broke and then test or revert it piece by piece. The log shows the system is using a default MP configuration (i.e. no MP table, only a suitable header). The recent changes definitely broke such systems -- someone doing them seems to have not cared about the default configurations. I've noticed the breakage recently and put it on my to-do list, but unfortunately I have no time to code a fix now. -- + Maciej W. Rozycki, Technical University of Gdansk, Poland + +--------------------------------------------------------------+ + e-mail: macro@ds2.pg.gda.pl, PGP key available + - 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/