From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754900Ab2BUR7d (ORCPT ); Tue, 21 Feb 2012 12:59:33 -0500 Received: from e9.ny.us.ibm.com ([32.97.182.139]:49407 "EHLO e9.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752532Ab2BUR7a (ORCPT ); Tue, 21 Feb 2012 12:59:30 -0500 Date: Tue, 21 Feb 2012 09:58:11 -0800 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, niv@us.ibm.com, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, Valdis.Kletnieks@vt.edu, dhowells@redhat.com, eric.dumazet@gmail.com, darren@dvhart.com, fweisbec@gmail.com, patches@linaro.org Subject: [PATCH tip/core/rcu 0/4] Additional RCU commits for 3.4 Message-ID: <20120221175810.GA10708@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/1.5.21 (2010-09-15) X-Content-Scanned: Fidelis XPS MAILER x-cbid: 12022117-7182-0000-0000-000000D9643A Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello! This series contains an additional four commits for 3.4. They are all small fixes. This series is in addition to the set posted earlier at https://lkml.org/lkml/2012/2/3/459, and there is some possibility that the direct-drive SRCU at https://lkml.org/lkml/2012/2/12/117 will also make it. The four new patches are as follows: 1. Fix RCU_FAST_NO_HZ to avoid continually retrying dyntick-idle entry if softirqs are pending. 2. Fix RCU_FAST_NO_HZ to avoid retrying dyntick-idle entry when idle is re-entered after a timer was posted. For both #1 and #2, the philosophy is that it is better to take a scheduling-clock interrupt than to burn lots of CPU in a futile attempt to process RCU callbacks. 3. Eliminate spurious warnings from synchronize_sched_expedited(), courtesy of Hugh Dickens. 4. Apply several fixes to rcutorture based on initial inspection. For a testing-only version of this patchset from git, please see the following subject-to-rebase branch: git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next Thanx, Paul ------------------------------------------------------------------------ b/kernel/rcutorture.c | 19 ++++++++++++++++--- b/kernel/rcutree.c | 2 +- b/kernel/rcutree_plugin.h | 3 ++- kernel/rcutree.c | 2 +- kernel/rcutree_plugin.h | 2 +- 5 files changed, 21 insertions(+), 7 deletions(-)