From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 7 Sep 2001 16:37:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 7 Sep 2001 16:37:41 -0400 Received: from johnson.mail.mindspring.net ([207.69.200.177]:5947 "EHLO johnson.mail.mindspring.net") by vger.kernel.org with ESMTP id ; Fri, 7 Sep 2001 16:37:30 -0400 Subject: Re: Trouble with update Preemptive patch for 2.4.9-ac9 From: Robert Love To: Stephen Frost Cc: Jordan Breeding , Linux Kernel In-Reply-To: <20010907072357.A11136@ns> In-Reply-To: <3B985287.2385275B@home.com> <999839075.865.7.camel@phantasy> <20010907072357.A11136@ns> Content-Type: text/plain Content-Transfer-Encoding: 7bit X-Mailer: Evolution/0.13.99+cvs.2001.09.05.07.08 (Preview Release) Date: 07 Sep 2001 16:37:50 -0400 Message-Id: <999895073.2127.5.camel@phantasy> Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2001-09-07 at 07:23, Stephen Frost wrote: > If you need a guinea pig for testing it on SMP I may be willing > to do that on one of my SMP machines. :) Let me know, I'll need > to do some setup work (attaching and setting up a serial > console, testing the machine without the patch to make sure it's > mostly happy, etc). I would certainly take you up on that offer. I honestly don't think the patch is ready for SMP, yet -- but we have to start somewhere. apply the patch and set CONFIG_SMP and CONFIG_PREEMPT to 'y' and let it run. Any errors, OOPS, etc, pass them this way. Unfortunately, if the patch fails, its going to fall hard. If the preemption is imperfect during SMP, certainly you will hardlock. It might help to enable CONFIG_DEBUG_SPINLOCKS and CONFIG_DEBUG_BUGVERBOSE -- these are present in the -ac tree. The NMI watchdog might prove useful, too. But honestly, just telling me it locks on boot is useful, so whatever you can manage. I appreciate any help. -- Robert M. Love rml at ufl.edu rml at tech9.net