Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 19 Jun 2002 10:03:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 19 Jun 2002 10:03:35 -0400 Received: from mail.ocs.com.au ([203.34.97.2]:50185 "HELO mail.ocs.com.au") by vger.kernel.org with SMTP id ; Wed, 19 Jun 2002 10:03:34 -0400 X-Mailer: exmh version 2.2 06/23/2000 with nmh-1.0.4 From: Keith Owens To: "Robbert Kouprie" Cc: linux-kernel@vger.kernel.org Subject: Re: The buggy APIC of the Abit BP6 In-reply-to: Your message of "Wed, 19 Jun 2002 15:23:13 +0200." <005f01c21794$7702b520$020da8c0@nitemare> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Thu, 20 Jun 2002 00:03:19 +1000 Message-ID: <25764.1024495399@ocs3.intra.ocs.com.au> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1045 Lines: 23 On Wed, 19 Jun 2002 15:23:13 +0200, "Robbert Kouprie" wrote: >I know the hardware sucks bad, but what's wrong with trying to work >around the problem providing noone else is bugged by the workaround? You do not have the data required to (a) detect the problem and (b) recover even if you could detect the problem. The APIC bus has a single bit checksum, the APIC hardware detects single bit errors and does a retransmission. It _cannot_ detect double bit errors, the bad data is accepted and processed with undefined side effects. What you see in the logs for a BP6 are error messages for single bit errors that were recovered by the hardware. You will never see messages for double bit errors, just unexplained oops and/or machine hangs. Yes, I have a BP6 :(. - 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/