From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753832AbZJ2JGV (ORCPT ); Thu, 29 Oct 2009 05:06:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752939AbZJ2JGV (ORCPT ); Thu, 29 Oct 2009 05:06:21 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:39255 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751614AbZJ2JGU (ORCPT ); Thu, 29 Oct 2009 05:06:20 -0400 Date: Thu, 29 Oct 2009 10:05:37 +0100 From: Ingo Molnar To: "Paul E. McKenney" 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 0/2] RCU force_quiescent_state() fix and dyntick cleanup Message-ID: <20091029090537.GB22963@elte.hu> References: <20091028151419.GA7838@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20091028151419.GA7838@linux.vnet.ibm.com> User-Agent: Mutt/1.5.19 (2009-01-05) X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.5 -1.5 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 * Paul E. McKenney wrote: > This patch series contains a cleanup and a fix: > > o Code cleanup from Lai Jiangshan that makes the calls to > rcu_irq_enter() and rcu_irq_exit() more obviously correct. > The previous code worked because rcu_irq_exit() is always > an empty function if !NO_HZ. Can go via tip:core/rcu, agreed? > > o Fix a low-probability race in the TREE_RCU infrastructure > that can be triggered by extremely long grace periods. Should go via tip:core/urgent as it's a fix for .32, agreed? Ingo