From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262356AbVFIL52 (ORCPT ); Thu, 9 Jun 2005 07:57:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262360AbVFIL52 (ORCPT ); Thu, 9 Jun 2005 07:57:28 -0400 Received: from mx2.elte.hu ([157.181.151.9]:2726 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S262356AbVFIL5X (ORCPT ); Thu, 9 Jun 2005 07:57:23 -0400 Date: Thu, 9 Jun 2005 13:55:47 +0200 From: Ingo Molnar To: Serge Noiraud Cc: "K.R. Foley" , linux-kernel , "Eugeny S. Mints" , Daniel Walker Subject: Re: [patch] Real-Time Preemption, -RT-2.6.12-rc6-V0.7.48-00 Message-ID: <20050609115547.GA12744@elte.hu> References: <20050608112801.GA31084@elte.hu> <42A7135C.5010704@cybsft.com> <42A72A53.5050809@cybsft.com> <1118306872.10717.38.camel@ibiza.btsn.frna.bull.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1118306872.10717.38.camel@ibiza.btsn.frna.bull.fr> 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, 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 * Serge Noiraud wrote: > > # CONFIG_DEBUG_RT_LOCKING_MODE is not set > > > > it seems to work fine. With the above enabled it hangs on both of my SMP > > systems as described above. :-/ > > Same problem here. OK unsetting the CONFIG_DEBUG_RT_LOCKING_MODE. this one should be fixed in the latest patch. (note that when DEBUG_RT_LOCKING_MODE is set the spinlocks/rwlocks default to non-preemptible. You can set preemption it via /proc/sys/kernel/preempt_locks. You normally dont want to enable this option.) > I have another problem : > I can't boot. could you try the latest (-48-03) patch? I fixed a couple of things that might impact SMP booting. > ...trying to set up timer (IRQ0) through the 8259A ... failed. > ...trying to set up timer as Virtual Wire IRQ... <======= freeze > > Is it a problem or a CONFIG parameter ? a freeze is always a problem, whether it can be worked around via a CONFIG parameter or not. Generally if you see any reduction in functionality that deviates from the stock Linux kernel, it's a bug. Ingo