From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755450Ab0DOSNG (ORCPT ); Thu, 15 Apr 2010 14:13:06 -0400 Received: from e9.ny.us.ibm.com ([32.97.182.139]:41983 "EHLO e9.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755019Ab0DOSND (ORCPT ); Thu, 15 Apr 2010 14:13:03 -0400 Date: Thu, 15 Apr 2010 11:12:55 -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, eric.dumazet@gmail.com Subject: [PATCH tip/core/rcu 0/16] rcu: v2 patches queued for 2.6.35 Message-ID: <20100415181255.GA19588@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! RFC preview of RCU patches queued for 2.6.35, take 2. Take 1 is at http://lkml.org/lkml/2010/4/5/134. Changes to old patches noted in "[]", new patches flagged with "New". 1. substitute set_need_resched for sending resched IPIs This reduces OS jitter. 2. make dead code really dead. [Updated commit message as suggested by Mathieu Desnoyers.] 3. move some code from macro to function Cleanups from Lai Jiangshan. 4. ignore offline CPUs in last non dyntick idle CPU check Fix to my CONFIG_RCU_FAST_NO_HZ code to handle offline and non-existent CPUs, also from Lai Jiangshan. 5. fix bogus CONFIG_PROVE_LOCKING in comments to reality 6. fix now bogus rcu_scheduler_active comments Comment fixups. 7. shrink rcutiny by making synchronize_rcu_bh be inline Shrink TINY_RCU some more. 8. rename rcutiny rcu_ctrlblk to rcu_sched_ctrlblk First step towards TINY_PREEMPTIBLE_RCU. 9. refactor RCU's context switch handling Reduce the number of needless softirqs. 10. slim down rcutiny by removing rcu_scheduler_active and friends More shrinkage for TINY_RCU 11. New: enable CPU_STALL_VERBOSE by default. It will have been in one release, so time to enable it. 12. New: disable CPU stall warnings upon panic 13. New: print boot-time console messages if RCU configs out of ordinary 14. New: improve RCU CPU stall-warning messages 15. New: permit discontiguous cpu_possible_mask CPU numbering 16. New: v2: reduce the number of spurious RCU_SOFTIRQ invocations Thanx, Paul b/Documentation/RCU/trace.txt | 35 ++++++------ b/include/linux/rcupdate.h | 15 ++--- b/include/linux/rcutiny.h | 12 +++- b/include/linux/rcutree.h | 2 b/include/linux/srcu.h | 4 - b/kernel/rcupdate.c | 19 ------ b/kernel/rcutiny.c | 9 --- b/kernel/rcutiny_plugin.h | 39 +++++++++++++ b/kernel/rcutree.c | 10 +++ b/kernel/rcutree.h | 1 b/kernel/rcutree_plugin.h | 2 b/kernel/rcutree_trace.c | 4 + b/kernel/sched.c | 2 b/kernel/softirq.c | 2 b/lib/Kconfig.debug | 2 include/linux/rcupdate.h | 12 +--- include/linux/rcutiny.h | 17 +++++ include/linux/rcutree.h | 4 + kernel/rcutiny.c | 20 ++++-- kernel/rcutree.c | 121 +++++++++++++++++++++++++++++------------- kernel/rcutree.h | 1 kernel/rcutree_plugin.h | 55 +++++++++++++++++-- 22 files changed, 275 insertions(+), 113 deletions(-)