From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757172AbXIQTSl (ORCPT ); Mon, 17 Sep 2007 15:18:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754861AbXIQTSe (ORCPT ); Mon, 17 Sep 2007 15:18:34 -0400 Received: from www.osadl.org ([213.239.205.134]:45853 "EHLO mail.tglx.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754640AbXIQTSd (ORCPT ); Mon, 17 Sep 2007 15:18:33 -0400 Subject: Re: Lossy interrupts on x86_64 From: Thomas Gleixner To: Jesse Barnes Cc: Randy Dunlap , linux-kernel@vger.kernel.org In-Reply-To: <200709171213.21511.jbarnes@virtuousgeek.org> References: <200709120833.15980.jbarnes@virtuousgeek.org> <200709120929.52217.jbarnes@virtuousgeek.org> <1189616795.4302.1.camel@chaos> <200709171213.21511.jbarnes@virtuousgeek.org> Content-Type: text/plain Date: Mon, 17 Sep 2007 21:18:23 +0200 Message-Id: <1190056703.2995.11.camel@chaos> Mime-Version: 1.0 X-Mailer: Evolution 2.11.92 (2.11.92-1.fc8) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2007-09-17 at 12:13 -0700, Jesse Barnes wrote: > On Wednesday, September 12, 2007, Thomas Gleixner wrote: > > does it make any difference when you boot the box with: > > > > nohz=off > > > > on the kernel command line ? > > Yeah, that makes a difference: the box hangs when I start receiving > vblank interrupts instead. However it's not a hard hang, I think X > just becomes unresponsive. I can still hit the power button on the > laptop and the machine shuts down gracefully, but ctl-alt-delete and > ctl-alt-backspace don't work. So X is probably still up and in charge > of input but may not be getting any more timeslices or something. Eeek, that sounds scary. Can you add "highres=off" as well ? tglx