From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262542AbVGFVGT (ORCPT ); Wed, 6 Jul 2005 17:06:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262509AbVGFVCN (ORCPT ); Wed, 6 Jul 2005 17:02:13 -0400 Received: from mail.metronet.co.uk ([213.162.97.75]:18843 "EHLO mail.metronet.co.uk") by vger.kernel.org with ESMTP id S262566AbVGFVAI (ORCPT ); Wed, 6 Jul 2005 17:00:08 -0400 From: Alistair John Strachan To: Ingo Molnar Subject: Re: Realtime Preemption, 2.6.12, Beginners Guide? Date: Wed, 6 Jul 2005 22:00:08 +0100 User-Agent: KMail/1.8.1 Cc: linux-kernel@vger.kernel.org References: <200507061257.36738.s0348365@sms.ed.ac.uk> <200507062047.26855.s0348365@sms.ed.ac.uk> <20050706204429.GA1159@elte.hu> In-Reply-To: <20050706204429.GA1159@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200507062200.08924.s0348365@sms.ed.ac.uk> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wednesday 06 Jul 2005 21:44, Ingo Molnar wrote: [snip] > > the ACPI-idle bug's primary effects were the missed wakeups, but they > should not cause lockups, because timer interrupts should always occur > and should eventually 'fix up' such missed wakeups. > > but there's another side-effect of the ACPI-idle bug: the ACPI code was > running with interrupts enabled and maybe the hardware locks up if > interrupted in the wrong moment. ACPI sleeps are sensitive things and > closely related to other IRQ hardware, which we all program with > interrupts disabled. So i'd not be surprised if the lockups were caused > by the ACPI-idle bug. > > Ingo Okay, well an hour later and still no lockups, so you're probably right. This is a completely unrelated question, but now we've got everything under control.. how do I make "quiet" actually do something on the RT patchset? Currently I flag it on the kernel cmdline, but I still get everything spewed to my primary VT. -- Cheers, Alistair. personal: alistair()devzero!co!uk university: s0348365()sms!ed!ac!uk student: CS/CSim Undergraduate contact: 1F2 55 South Clerk Street, Edinburgh. EH8 9PP.