From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752790Ab1EUOGS (ORCPT ); Sat, 21 May 2011 10:06:18 -0400 Received: from e7.ny.us.ibm.com ([32.97.182.137]:59261 "EHLO e7.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752213Ab1EUOGQ (ORCPT ); Sat, 21 May 2011 10:06:16 -0400 Date: Sat, 21 May 2011 07:06:13 -0700 From: "Paul E. McKenney" To: mingo@elte.hu Cc: linux-kernel@vger.kernel.org, randy.dunlap@oracle.com, Valdis.Kletnieks@vt.edu, a.p.zijlstra@chello.nl Subject: [GIT PULL rcu/next] fixes and breakup of memory-barrier-decrease patch Message-ID: <20110521140613.GA13062@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/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, Ingo, This pull requests covers some RCU bug fixes and one patch rework. The first group breaks up the infamous now-reverted (but ultimately vindicated) "Decrease memory-barrier usage based on semi-formal proof" commit into five commits. These five commits immediately follow the revert, and the diff across all six of these commits is empty, so that the effect of the five commits is to revert the revert. Another commit, "Avoid build error for third-party modules", fixes a build error reported by Randy Dunlap. Another pair of commits, "Add atomic_or()" and "Avoid acquiring rcu_node locks in timer functions", fix a lockdep splat reported by Valdis Kletnieks. Finally, "Remove waitqueue usage for cpu, node, and boost kthreads", from Peter Zijlstra, simplifies the RCU kthread wakeup logic and that also fixes a bug that resulted in a crash. These changes are available in the -rcu git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-2.6-rcu.git rcu/next ------------------> Paul E. McKenney (8): rcu: Add memory barriers rcu: Remove old memory barriers from rcu_process_callbacks() rcu: Don't do reschedule unless in irq rcu: Make rcu_enter_nohz() pay attention to nesting rcu: Decrease memory-barrier usage based on semi-formal proof rcu: Avoid build error for third-party modules atomic: Add atomic_or() rcu: Avoid acquiring rcu_node locks in timer functions Peter Zijlstra (1): rcu: Remove waitqueue usage for cpu, node, and boost kthreads Documentation/RCU/trace.txt | 17 ++--- include/linux/atomic.h | 13 ++++ include/linux/rcupdate.h | 5 +- kernel/rcutree.c | 162 +++++++++++++++++-------------------------- kernel/rcutree.h | 30 ++++---- kernel/rcutree_plugin.h | 23 +----- kernel/rcutree_trace.c | 12 ++-- 7 files changed, 112 insertions(+), 150 deletions(-)