From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757215Ab0ICStU (ORCPT ); Fri, 3 Sep 2010 14:49:20 -0400 Received: from mail-bw0-f46.google.com ([209.85.214.46]:56940 "EHLO mail-bw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751113Ab0ICStT convert rfc822-to-8bit (ORCPT ); Fri, 3 Sep 2010 14:49:19 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:reply-to:to:subject:date:user-agent:cc:references:in-reply-to :mime-version:content-type:content-transfer-encoding:message-id; b=u7/DV2KyIEExq3Eh/PeJ3KQ6u6ILKAfWJven0rcIm0ifF8CfJdHi52rv7ZqvN7ccvX V7tYP2CX2arNkBsukbew3kts3BR3J0pOq9FgLNmvE0Hb+dEUPF/HFj06K7YjNPHuwWtE ZORTMDdfWKhm9uoyMQ/dRTEqfAC9ltmTrjHRg= From: Maciej Rutecki Reply-To: maciej.rutecki@gmail.com To: Matthias Dahl Subject: Re: [2.6.35.x regression] rcu_preempt_state stall warning and machine slow-downs Date: Fri, 3 Sep 2010 20:49:13 +0200 User-Agent: KMail/1.13.5 (Linux/2.6.36-rc3; KDE/4.4.5; i686; ; ) Cc: linux-kernel@vger.kernel.org References: <201009010847.20236.ml_kernel@mortal-soul.de> In-Reply-To: <201009010847.20236.ml_kernel@mortal-soul.de> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 8BIT Message-Id: <201009032049.13830.maciej.rutecki@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On środa, 1 września 2010 o 08:47:19 Matthias Dahl wrote: > Hi. > > I've a recurring problem w/ kernel 2.6.35.x that I cannot pinpoint exactly > but seems to be related to rcu_preempt_state stall warnings I get > frequently. > > From time to time, the machine slows down to an almost halt (meaning jumpy > or non-responsive mouse cursor, unable to switch to text console, ...) > which can also result in a complete hang w/o any way to recover. > Sometimes the system catches up again but once this happened, the system > is sluggish and a reboot is required nevertheless. High load seems to help > a lot to trigger this issue. > > In every instance, I found stall warnings in my log which might be related. > I have attached three of them along with my config and dmesg. > > The system works flawlessly with pre-2.6.35 kernels- no stall warnings and > no slow-downs at all. > > If there is anything I can do to help further diagnose this problem, please > let me know. > > So long, > matthias. > > PS. Please cc' me because I am not subscribed to the list. Thanks a lot. I created a Bugzilla entry at https://bugzilla.kernel.org/show_bug.cgi?id=17732 for your bug report, please add your address to the CC list in there, thanks! -- Maciej Rutecki http://www.maciek.unixy.pl