Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755668Ab0KKLE4 (ORCPT ); Thu, 11 Nov 2010 06:04:56 -0500 Received: from va3ehsobe006.messaging.microsoft.com ([216.32.180.16]:23511 "EHLO VA3EHSOBE009.bigfish.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754305Ab0KKLEy (ORCPT ); Thu, 11 Nov 2010 06:04:54 -0500 X-SpamScore: -39 X-BigFish: VPS-39(z21eRzbb2cK1432N98dN1419Mzz1202hzz15d4Rz32i2a8h637h668h61h) X-Spam-TCS-SCL: 0:0 X-Forefront-Antispam-Report: KIP:(null);UIP:(null);IPVD:NLI;H:ausb3extmailp02.amd.com;RD:ausb3extmailp02.amd.com;EFVD:NLI X-WSS-ID: 0LBPW3P-01-7U5-02 X-M-MSG: Date: Thu, 11 Nov 2010 12:06:42 +0100 From: "Roedel, Joerg" To: Borislav Petkov CC: Andrew Lutomirski , Clemens Ladisch , "linux-kernel@vger.kernel.org" , Thomas Gleixner , Peter Zijlstra , Ingo Molnar , "H. Peter Anvin" , x86 Subject: Re: [FALSE ALARM] Re: HPET (?) related hangs and breakage in 2.6.35,36 Message-ID: <20101111110642.GN8917@amd.com> References: <4CD966D8.4000602@ladisch.de> <20101109153805.GB3146@kryptos.osrc.amd.com> <20101109180123.GB31121@aftab> <20101110185031.GB13539@aftab> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20101110185031.GB13539@aftab> Organization: Advanced Micro Devices =?iso-8859-1?Q?GmbH?= =?iso-8859-1?Q?=2C_Karl-Hammerschmidt-Str=2E_34=2C_85609_Dornach_bei_M=FC?= =?iso-8859-1?Q?nchen=2C_Gesch=E4ftsf=FChrer=3A_Thomas_M=2E_McCoy=2C_Giuli?= =?iso-8859-1?Q?ano_Meroni=2C_Andrew_Bowd=2C_Sitz=3A_Dornach=2C_Gemeinde_A?= =?iso-8859-1?Q?schheim=2C_Landkreis_M=FCnchen=2C_Registergericht_M=FCnche?= =?iso-8859-1?Q?n=2C?= HRB Nr. 43632 User-Agent: Mutt/1.5.20 (2009-06-14) X-OriginatorOrg: amd.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1338 Lines: 33 On Wed, Nov 10, 2010 at 01:50:31PM -0500, Borislav Petkov wrote: > On Wed, Nov 10, 2010 at 01:48:00PM -0500, Andrew Lutomirski wrote: > > > Clocksource: tsc unstable (delta = -34355296774 ns) > > > Switching: to clocksource hpet > > > > Please disregard -- this is a bug in nouveau (or drm) not hpet. I'll > > send a bug report to the maintainers. > > Interesting! Joerg was complaining about similar symptoms with .36 today > too. The issue I have seen was on two boxes with 890FX chipset and Phenom II X6 CPUs on a recent avi/master which was 2.6.36 + some kvm patches. The problem was that the box became extremly sluggish and slow. I stated dstat and it reported a lot of missed ticks. After some time the clocksource tsc became unstable and the system became responsive again. I have not yet investigated this further but can do any requested tests. Joerg -- AMD Operating System Research Center Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach General Managers: Alberto Bozzo, Andrew Bowd Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632 -- 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/