From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261209AbVGVPJz (ORCPT ); Fri, 22 Jul 2005 11:09:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261253AbVGVPJz (ORCPT ); Fri, 22 Jul 2005 11:09:55 -0400 Received: from e31.co.us.ibm.com ([32.97.110.129]:51429 "EHLO e31.co.us.ibm.com") by vger.kernel.org with ESMTP id S261209AbVGVPJy (ORCPT ); Fri, 22 Jul 2005 11:09:54 -0400 Subject: Re: New timeofday subsystem: Lockups From: john stultz To: Frank Sorenson Cc: lkml , George Anzinger , Ulrich Windl , Christoph Lameter , benh@kernel.crashing.org, Nishanth Aravamudan In-Reply-To: <42E0A968.8060105@tuxrocks.com> References: <1121484326.28999.3.camel@cog.beaverton.ibm.com> <42E0A968.8060105@tuxrocks.com> Content-Type: text/plain Date: Fri, 22 Jul 2005 08:09:28 -0700 Message-Id: <1122044969.2954.7.camel@leatherman> Mime-Version: 1.0 X-Mailer: Evolution 2.2.2 (2.2.2-5) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2005-07-22 at 02:08 -0600, Frank Sorenson wrote: > I'm not sure whether this is an issue with John's TOD patches, John's > NTP rework, or Nish's softtimer patches, but something in this > combination seems to be locking up my system frequently. Often, it will > completely hang during boot, and it periodically hangs while starting X > or even just under normal (unstressed) use. > > During several of the boot-ups, the NMI Watchdog has caught lockups. > Here is the output of one of those lockups (hand-copied, so hopefully no > mistakes): Thanks for the detailed bug report! Hmmm. It looks like the TSC interpolator is deadlocking. I'll try to dig in and hunt that one down (although forgive me if I don't get back to you until sometime next week). Thanks again for the great testing and reporting! -john