From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933181Ab0JZNRJ (ORCPT ); Tue, 26 Oct 2010 09:17:09 -0400 Received: from s15228384.onlinehome-server.info ([87.106.30.177]:40838 "EHLO mail.x86-64.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932464Ab0JZNRI (ORCPT ); Tue, 26 Oct 2010 09:17:08 -0400 Date: Tue, 26 Oct 2010 15:18:43 +0200 From: Borislav Petkov To: Markus Trippelsdorf Cc: "linux-kernel@vger.kernel.org" , "hpa@linux.intel.com" , Thomas Gleixner , Ingo Molnar , Andreas Herrmann Subject: Re: Clocksource tsc unstable (delta = -8589361717 ns) in current git Message-ID: <20101026131843.GC17852@aftab> References: <20101026112052.GA1672@arch.trippelsdorf.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101026112052.GA1672@arch.trippelsdorf.de> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Oct 26, 2010 at 07:20:52AM -0400, Markus Trippelsdorf wrote: > On my AMD system the following kernel messages are sometimes printed > after several hours of uptime: > Clocksource tsc unstable (delta = -8589361717 ns) > Switching to clocksource hpet This is strange, tsc is actually stable on your F10h revC. > This happened several times already: > # grep "Clocksource" kernel.* > kernel.log:Oct 24 18:31:17 arch kernel: Clocksource tsc unstable (delta = -8591703466 ns) > kernel.log:Oct 26 12:54:38 arch kernel: Clocksource tsc unstable (delta = -8589361717 ns) > kernel.log.1:Oct 22 21:43:51 arch kernel: Clocksource tsc unstable (delta = -25772316650 ns) Do you have any warnings/oopses before that, can we have the whole dmesg with the above messages? > The computer is nearly unusable afterwards (second long delays, that > seem to grow larger and larger) and only a prompt reboot can fix the > problem. > I'm running the latest git kernel. Version 2.6.36 does not show these > symptoms. > > Dmesg and kernel config are attached. > > -- > Markus > Initializing cgroup subsys cpu > Linux version 2.6.36-05618-gb18cae4-dirty (markus@arch.trippelsdorf.de) (gcc version 4.5.1 (GCC) ) #41 SMP PREEMPT Tue Oct 26 06:51:47 CEST 2010 ...-dirty means you have some changes ontop of b18cae4. What are those? > Command line: root=/dev/sdb2 fbcon=rotate:3 quiet kexec_jump_back_entry=0x23d64482b7e72bb7 > BIOS-provided physical RAM map: otherwise, I don't see anything strange in your dmesg. Unless tglx has a better idea, I'd ask you to bisect it. 5618 changesets shouldn't be that much but I don't know, if the issue appears every several hours it could still be tedious. Thanks. -- Regards/Gruss, Boris. Advanced Micro Devices GmbH Einsteinring 24, 85609 Dornach General Managers: Alberto Bozzo, Andrew Bowd Registration: Dornach, Gemeinde Aschheim, Landkreis Muenchen Registergericht Muenchen, HRB Nr. 43632