From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757244AbXIQTO3 (ORCPT ); Mon, 17 Sep 2007 15:14:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753592AbXIQTOT (ORCPT ); Mon, 17 Sep 2007 15:14:19 -0400 Received: from outbound-mail-57.bluehost.com ([69.89.20.37]:52739 "HELO outbound-mail-57.bluehost.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1754951AbXIQTOS (ORCPT ); Mon, 17 Sep 2007 15:14:18 -0400 From: Jesse Barnes To: Thomas Gleixner Subject: Re: Lossy interrupts on x86_64 Date: Mon, 17 Sep 2007 12:13:21 -0700 User-Agent: KMail/1.9.7 Cc: Randy Dunlap , linux-kernel@vger.kernel.org References: <200709120833.15980.jbarnes@virtuousgeek.org> <200709120929.52217.jbarnes@virtuousgeek.org> <1189616795.4302.1.camel@chaos> In-Reply-To: <1189616795.4302.1.camel@chaos> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200709171213.21511.jbarnes@virtuousgeek.org> X-Identified-User: {642:box128.bluehost.com:virtuous:virtuousgeek.org} {sentby:smtp auth 67.88.206.99 authed with jbarnes@virtuousgeek.org} X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - box128.bluehost.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [642 12] / [47 12] X-AntiAbuse: Sender Address Domain - virtuousgeek.org Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 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. So to summarize: 2.6.23-rc5: works 2.6.23-0.171.rc5.git1.fc8 w/o boot options: lossy interrupts 2.6.23-0.171.rc5.git1.fc8 nohz=off: hang when starting 3d apps using vblank interrupts Sorry it took so long for me to get back to you, I've been out of range for a few days... Thanks, Jesse