From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754431AbZJ1PQf (ORCPT ); Wed, 28 Oct 2009 11:16:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754409AbZJ1PQd (ORCPT ); Wed, 28 Oct 2009 11:16:33 -0400 Received: from e6.ny.us.ibm.com ([32.97.182.146]:39229 "EHLO e6.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754295AbZJ1PQd (ORCPT ); Wed, 28 Oct 2009 11:16:33 -0400 Date: Wed, 28 Oct 2009 08:14:19 -0700 From: "Paul E. McKenney" To: linux-kernel@vger.kernel.org Cc: mingo@elte.hu, 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: [PATCH tip/core/rcu 0/2] RCU force_quiescent_state() fix and dyntick cleanup Message-ID: <20091028151419.GA7838@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.15+20070412 (2007-04-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. o Fix a low-probability race in the TREE_RCU infrastructure that can be triggered by extremely long grace periods. Thanx, Paul