From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262091AbVFILlX (ORCPT ); Thu, 9 Jun 2005 07:41:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262173AbVFILlX (ORCPT ); Thu, 9 Jun 2005 07:41:23 -0400 Received: from mx2.elte.hu ([157.181.151.9]:60066 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S262352AbVFILk4 (ORCPT ); Thu, 9 Jun 2005 07:40:56 -0400 Date: Thu, 9 Jun 2005 13:39:16 +0200 From: Ingo Molnar To: "K.R. Foley" Cc: linux-kernel@vger.kernel.org, "Eugeny S. Mints" , Daniel Walker Subject: Re: [patch] Real-Time Preemption, -RT-2.6.12-rc6-V0.7.48-00 Message-ID: <20050609113916.GA8904@elte.hu> References: <20050608112801.GA31084@elte.hu> <42A7135C.5010704@cybsft.com> <42A72A53.5050809@cybsft.com> <20050608191848.GA3411@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20050608191848.GA3411@elte.hu> 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 * Ingo Molnar 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. :-/ > > ahh ... i'll try to reproduce it that way. found the bug - it was the incorrect initialization of debug_slock/rwlock. I've uploaded -48-02 with the fix. This release also includes a new debugging feature: CONFIG_DETECT_SOFTLOCKUP, which works similar to the NMI watchdog but detects soft (==no reschedules) lockups. I've also converted a few more local_irq_*() calls to raw_local_irq_*() calls. Ingo