From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 28 May 2002 10:06:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 28 May 2002 10:06:37 -0400 Received: from pc2-cwma1-5-cust12.swa.cable.ntl.com ([80.5.121.12]:39418 "EHLO irongate.swansea.linux.org.uk") by vger.kernel.org with ESMTP id ; Tue, 28 May 2002 10:06:35 -0400 Subject: Re: bluesmoke, machine check exception, reboot From: Alan Cox To: Corin Hartland-Swann Cc: linux-kernel@vger.kernel.org In-Reply-To: Content-Type: text/plain Content-Transfer-Encoding: 7bit X-Mailer: Ximian Evolution 1.0.3 (1.0.3-6) Date: 28 May 2002 16:09:00 +0100 Message-Id: <1022598540.4123.89.camel@irongate.swansea.linux.org.uk> Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2002-05-28 at 14:46, Corin Hartland-Swann wrote: > CPU 1: Machine Check Exception: 0000000000000004 > Bank 1: b200000000000115 > Kernel panic: CPU context corrupt > > How do you work out what the numbers mean? Is there some kind of reference > to it, or are you just Alan "decodes machine check exceptions in his head" > Cox :) From the code it seems to be some kind of MCG status and MC0 status > - but of course, I have no idea what that means... I contemplate them in zen peace and they speak to me 8). The MCE value is the flags from the control register. The Bank n value is a dump of the register that explains what the fault is. The decoding rules are in the Intel Pentium III documentation set. > After checking the logs (above) I found that the two times this has > happened it has managed to write it to the logs. Is the fact that it > sync()d a good indication that it will manage to reboot OK? Is the fact the airbag deployed a good indication that it will deploy if you keep crashing into walls ? Its logging a CPU error where it decides the CPU is in an unrecoverable state. The odds are pretty good but each time you are taking the risk it won't, and if its a hardware problem that it might simply drop dead for good. Alan