From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754830Ab3A0AEv (ORCPT ); Sat, 26 Jan 2013 19:04:51 -0500 Received: from e7.ny.us.ibm.com ([32.97.182.137]:41987 "EHLO e7.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754530Ab3A0AEs (ORCPT ); Sat, 26 Jan 2013 19:04:48 -0500 Date: Sat, 26 Jan 2013 16:04:35 -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@efficios.com, josh@joshtriplett.org, niv@us.ibm.com, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, Valdis.Kletnieks@vt.edu, dhowells@redhat.com, edumazet@google.com, darren@dvhart.com, fweisbec@gmail.com, sbw@mit.edu Subject: [PATCH tip/core/rcu 0/4] v2 Documentation and rcutorture changes for 3.9 Message-ID: <20130127000435.GA1521@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: 13012700-5806-0000-0000-00001ECE0D57 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello! The following are changes to documentation and rcutorture: 1. Export trace_clock_local() in order to allow rcutorture event tracing to emit the time of the beginning of the RCU read-side critical section at the point where a failure is detected. 2. Reduce rcutorture's read-side tracing to include only failures, thus cutting the number of events down to something reasonable (normally zero, in fact!). 3. Add atomic_xchg() to the list of atomic operations and memory barriers, courtesy of Richard Braun. 4. Make rcutorture's shuffler task also shuffle recently added rcutorture kthreads. Changes since v1: o Fixed build problem in #2 located by Randy Dunlap based on diagnosis from Steven Rostedt. o Added patch #4. Thanx, Paul b/Documentation/atomic_ops.txt | 2 + b/Documentation/memory-barriers.txt | 1 b/include/linux/rcupdate.h | 13 ++++++-- b/include/trace/events/rcu.h | 19 +++++++++--- b/kernel/rcupdate.c | 9 +++-- b/kernel/rcutorture.c | 55 ++++++++++++++++++++++++++++-------- b/kernel/trace/trace_clock.c | 1 b/lib/Kconfig.debug | 1 8 files changed, 79 insertions(+), 22 deletions(-)