From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753141Ab0EPQO2 (ORCPT ); Sun, 16 May 2010 12:14:28 -0400 Received: from moutng.kundenserver.de ([212.227.126.171]:60868 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751863Ab0EPQO1 (ORCPT ); Sun, 16 May 2010 12:14:27 -0400 Message-ID: <4BF019CF.1030309@biereigel-wb.de> Date: Sun, 16 May 2010 18:14:07 +0200 From: Stefan Biereigel User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.9) Gecko/20100317 Lightning/1.0b1 Thunderbird/3.0.4 MIME-Version: 1.0 To: Donald Allen CC: john stultz , linux-kernel@vger.kernel.org, Thomas Gleixner Subject: Re: PROBLEM: tickless scheduling References: <1273540344.3843.101.camel@localhost.localdomain> <1273697523.2856.3.camel@localhost.localdomain> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Provags-ID: V01U2FsdGVkX1+nlsmZ+BZW+1rVbopk4bCaKPeFMpaSUm3oCwl XFh7ezYMGlikYK+CjE6IJ75UzFsX0aoCa8IvsVdP7zflTTs4Az QIRJElBEBADLClvfCLii5HifufTd0n8rJ+PYuFa1xA= Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > Attached. This is from the 2.6.30 kernel on the Arch Linux install cd. > > Here's another bit of data. As I've said previously, the problems I'm > reporting were observed on a Toshiba NB310-305 netbook with a > single-core Atom 450 processor. I just built myself a mini-ITX system > using the Intel D510MO motherboard, which provides a dual-core D510 > Atom processor. The other hardware on the board is similar to the > Toshiba. I installed the same Slackware snapshot I used on the > Toshiba, and did the home directory transfer without any problem at > all with the default tickless kernel. The hardware isn't identical, > and while I don't know the internals of the Linux kernel at all, my > gut, backed up by many years of OS development work in scheduling and > memory management, is telling me that the key difference is dual- vs. > single-core. Just a guess. > > Hope this helps -- > > /Don > Hello everyone, I hope I can add something here, because I am experiencing the exact same Problem as Don describes. I'm running a PackardBell EasyNote MB89 featuring a Core 2 Duo, 4 GB of RAM, Intel Chipset (Santa Rosa), SATA HDD. My Machine even hangs at boot, absolutely doing nothing until i wiggle the touchpad. This is definately reproduceable, but I think it doesn't occur that often in X-Window-System, if X is off I can just wait a couple of seconds and there I go. I compiled other kernels myself with tickless disabled and Ticks set to various values (250, 1000) which completely resolved my problem. If you want, I can get you some Output/logs/whatever because I'm fixed to using this kernel ATM (which doesn't really hurt because I use X and son't shut down my Notebook that often). Even though I don't know what exact kernel-version this problem brings (using another machine ATM from vacation) I can say that I existed since Opensuse 11.1 I guess, so maybe 2.6.30 and above. Hope I can help -- Stefan