From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759979AbYEACZs (ORCPT ); Wed, 30 Apr 2008 22:25:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754362AbYEACZk (ORCPT ); Wed, 30 Apr 2008 22:25:40 -0400 Received: from idcmail-mo1so.shaw.ca ([24.71.223.10]:21632 "EHLO pd2mo3so.prod.shaw.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753897AbYEACZj (ORCPT ); Wed, 30 Apr 2008 22:25:39 -0400 Date: Wed, 30 Apr 2008 20:25:28 -0600 From: Robert Hancock Subject: Re: APIC error 80(80) and 00(80) In-reply-to: To: Timur Alperovich Cc: linux-kernel@vger.kernel.org Message-id: <48192A18.2080502@shaw.ca> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1; format=flowed Content-transfer-encoding: 7bit References: User-Agent: Thunderbird 2.0.0.12 (Windows/20080213) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Timur Alperovich wrote: > Hi, > > I apologize if others have asked this question before, but I'm a bit > confused by the APIC error messages, i.e. I couldn't find what they > mean. After inserting a kernel module I wrote and trying to read the > device it created, I see the following in dmesg: > > Losing some ticks... checking if CPU frequency changed. > warning: many lost ticks. > Your time source seems to be instable or some driver is hogging interupts > rip tg3_read32+0x9/0xa [tg3] > Falling back to HPET > APIC error on CPU3: 00(80) > APIC error on CPU3: 80(80) > > where the last message was repeated 1600 times. Could anyone tell me > what it means or of a better place to ask about it? Not sure exactly what that means, but sounds like something really wonky happened.. I'd suspect your code somehow got stuck in a loop with interrupts off on one CPU, or corrupted memory, or something.