Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936087AbWK1UHW (ORCPT ); Tue, 28 Nov 2006 15:07:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S936083AbWK1UHW (ORCPT ); Tue, 28 Nov 2006 15:07:22 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:65428 "EHLO mx2.mail.elte.hu") by vger.kernel.org with ESMTP id S936087AbWK1UHU (ORCPT ); Tue, 28 Nov 2006 15:07:20 -0500 Date: Tue, 28 Nov 2006 21:05:19 +0100 From: Ingo Molnar To: Fernando Lopez-Lezcano Cc: "Linux-Kernel," Subject: Re: 2.6.19-rc6-rt7: Kernel BUG at kernel/rtmutex.c:672 Message-ID: <20061128200519.GA25364@elte.hu> References: <1164737474.15887.10.camel@cmn3.stanford.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1164737474.15887.10.camel@cmn3.stanford.edu> User-Agent: Mutt/1.4.2.2i X-ELTE-SpamScore: -4.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-4.5 required=5.9 tests=ALL_TRUSTED,AWL,BAYES_00 autolearn=no SpamAssassin version=3.0.3 -3.3 ALL_TRUSTED Did not pass through any untrusted hosts -2.6 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] 1.4 AWL AWL: From: address is in the auto white-list X-ELTE-VirusStatus: clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 724 Lines: 17 * Fernando Lopez-Lezcano wrote: > Nov 28 03:26:39 localhost kernel: Kernel BUG at kernel/rtmutex.c:672 hm, this means the lock was taken twice by the same task: enabling CONFIG_PROVE_LOCKING ought to tell us the precise locking info and backtraces that causes this situation. I looked at the code and it wasnt obvious at first sight. (we should only be holding cache_chain_mutex here, and l3->list_lock should not be taken at this point.) Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/