From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754726Ab0BYKCw (ORCPT ); Thu, 25 Feb 2010 05:02:52 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:37499 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753390Ab0BYKCu (ORCPT ); Thu, 25 Feb 2010 05:02:50 -0500 Date: Thu, 25 Feb 2010 11:01:47 +0100 From: Ingo Molnar To: "Paul E. McKenney" , Peter Zijlstra Cc: linux-kernel@vger.kernel.org, laijs@cn.fujitsu.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@polymtl.ca, josh@joshtriplett.org, dvhltc@us.ibm.com, niv@us.ibm.com, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, Valdis.Kletnieks@vt.edu, dhowells@redhat.com Subject: Re: [PATCH tip/core/rcu 0/21] v6 add lockdep-based diagnostics to rcu_dereference() Message-ID: <20100225100147.GA28060@elte.hu> References: <20100223010435.GA666@linux.vnet.ibm.com> <20100225100022.GA25261@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100225100022.GA25261@elte.hu> User-Agent: Mutt/1.5.20 (2009-08-17) X-ELTE-SpamScore: -2.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.5 -2.0 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Ingo Molnar wrote: > ============================================== > [ BUG: Unsafe rcu_dereference_check() usage! ] > ---------------------------------------------- Also, could we please make the message a bit less alarmist, something more in line with existing lockdep warnings: > [ INFO: potentially unsafe rcu_dereference_check() usage detected. ] ... as we should expect quite a few false positives, initially at least. Thanks, Ingo