From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262328AbVGGAXg (ORCPT ); Wed, 6 Jul 2005 20:23:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262131AbVGFT7h (ORCPT ); Wed, 6 Jul 2005 15:59:37 -0400 Received: from mx2.elte.hu ([157.181.151.9]:50061 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S262281AbVGFQ26 (ORCPT ); Wed, 6 Jul 2005 12:28:58 -0400 Date: Wed, 6 Jul 2005 18:28:56 +0200 From: Ingo Molnar To: Alistair John Strachan Cc: linux-kernel@vger.kernel.org Subject: Re: Realtime Preemption, 2.6.12, Beginners Guide? Message-ID: <20050706162856.GB24728@elte.hu> References: <200507061257.36738.s0348365@sms.ed.ac.uk> <200507061351.18410.s0348365@sms.ed.ac.uk> <20050706133915.GB19467@elte.hu> <200507061658.53845.s0348365@sms.ed.ac.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200507061658.53845.s0348365@sms.ed.ac.uk> User-Agent: Mutt/1.4.2.1i X-ELTE-SpamVersion: MailScanner 4.31.6-itk1 (ELTE 1.2) SpamAssassin 2.63 ClamAV 0.73 X-ELTE-VirusStatus: clean X-ELTE-SpamCheck: no X-ELTE-SpamCheck-Details: score=-4.9, required 5.9, autolearn=not spam, BAYES_00 -4.90 X-ELTE-SpamLevel: X-ELTE-SpamScore: -4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * Alistair John Strachan wrote: > On Wednesday 06 Jul 2005 14:39, Ingo Molnar wrote: > > * Alistair John Strachan wrote: > > > Then it continues to boot. I'm getting periodic lockups under high > > > network load, however, though I suspect that might be the ipw2200 > > > driver I compiled against the realtime-preempt kernel. Are there any > > > known issues with external modules versus PREEMPT-RT? > > > > you should keep an eye on compile-time warnings, but otherwise, most of > > the API deviations should be runtime detected and should be reported in > > one way or another (if you have all debugging options enabled). > > I now no longer suspect the ipw2200 module. It locks up within 5 > minutes, reliably, with or without network load. I seem to always have > to promote a large redraw in X11 before it occurs, but this is just > hand waving, I don't really have any evidence. just to make sure: you dont have debug_direct_keyboard when using the console keyboard and mouse, correct? Sometimes i forget to turn it off and i get a crash in the keyboard or mouse irq after some time. Under X that often looks like a silent hard lockup. Ingo