From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756936Ab0IJFgG (ORCPT ); Fri, 10 Sep 2010 01:36:06 -0400 Received: from smtp-118-thursday.nerim.net ([62.4.16.118]:61998 "EHLO maiev.nerim.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752715Ab0IJFgE (ORCPT ); Fri, 10 Sep 2010 01:36:04 -0400 Date: Fri, 10 Sep 2010 07:36:01 +0200 From: Damien Wyart To: Artur Skawina Cc: Nix , Thomas Gleixner , Venkatesh Pallipadi , John Drescher , linux-kernel@vger.kernel.org Subject: Re: [BISECTED] 2.6.35.*: horrible (exponential? >linear) slowdown to unusability (HPET) Message-ID: <20100910053601.GA4981@brouette> References: <87zkvx2ese.fsf@spindle.srvr.nix> <20100906053255.GA23340@brouette> <87iq2gyllg.fsf@spindle.srvr.nix> <87wrqu8s1u.fsf_-_@spindle.srvr.nix> <4C8982EF.8030705@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4C8982EF.8030705@gmail.com> 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 09/10/10 00:34, Nix wrote: > > It did: I found a system on which the fault was consistently > > reproducible. Bisected. Thanks for doing this! Nice work! * Artur Skawina [2010-09-10 02:59]: > I'm seeing this too, except here it happens every couple of days of uptime, > lasts for a few minutes, and then goes away. Which made bisecting a bit > impractical... Thank you for doing it. > HW is similar; x64 and X58/82801JI/ICH10, tsc clocksrc. > Did that printk trigger? Empirically confirming that this is the problem > could take weeks here, as it happens so rarely... Same here, I have not yet seen the problem with 2.6.35.4 and a max uptime of 3 or 4 days. My details are identical: tsc clocksource, x86-64 and X58/82801JI/ICH10. -- Damien