From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751340AbdARCx0 (ORCPT ); Tue, 17 Jan 2017 21:53:26 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:46053 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751060AbdARCxZ (ORCPT ); Tue, 17 Jan 2017 21:53:25 -0500 Date: Tue, 17 Jan 2017 18:53:16 -0800 From: "Paul E. McKenney" To: linux-kernel@vger.kernel.org Cc: mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, dvhart@linux.intel.com, fweisbec@gmail.com, oleg@redhat.com, bobby.prani@gmail.com Subject: Re: [PATCH tip/core/rcu 0/20] Miscellaneous fixes for 4.11 Reply-To: paulmck@linux.vnet.ibm.com References: <20170114091255.GA20854@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170114091255.GA20854@linux.vnet.ibm.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-GCONF: 00 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 17011802-0024-0000-0000-000015B8EE7D X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00006453; HX=3.00000240; KW=3.00000007; PH=3.00000004; SC=3.00000199; SDB=6.00809120; UDB=6.00394133; IPR=6.00586477; BA=6.00005066; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00013954; XFM=3.00000011; UTC=2017-01-18 02:53:21 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17011802-0025-0000-0000-00004807F620 Message-Id: <20170118025316.GB2042@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-01-17_17:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=1 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1612050000 definitions=main-1701180042 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Jan 14, 2017 at 01:12:55AM -0800, Paul E. McKenney wrote: Hello! This series provides miscellaneous fixes: 1. Make RCU_EXPEDITE_BOOT be the default in order to speed up boot, courtesy of Sebastian Andrzej Siewior. 2. Make RCU suspicious-access lockdep splats use pr_err(). 3. Disable sys_membarrier when nohz_full is enabled, courtesy of Mathieu Desnoyers. 4. Only dump stalled-tasks stacks if there was a real stall, courtesy of Byungchul Park. 5. Remove unneeded rcu_process_callbacks() declarations. 6. Remove unused but set "mask" variable, courtesy of Tobias Klauser. 7. Add long-term CPU kicking. 8. Remove short-term CPU kicking. 9. Once again use NMI-based stack traces in stall warnings. 10. Re-enable TASKS_RCU for User Mode Linux. 11. Don't wake rcuc/X kthreads on NOCB CPUs. 12. Add comment headers to expedited-grace-period counter functions. 13. Make rcu_cpu_starting() use its "cpu" argument. 14. Enable RCU tracepoints by default to aid in debugging, courtesy of Matt Fleming. 15. Fix comment in rcu_organize_nocb_kthreads(), which no longer spawns kthreads. 16. Clarify comments about when llist locking is needed, courtesy of Joel Fernandes. 17. Eliminate unused expedited_normal counter. 18. Add lockdep checks to synchronous expedited primitives. Changes since v1: o Reverse the order of patches 7 and 8. o Defer the patch adding tests for trivial grace periods. o Defer the patch making cond_resched() provide RCU quiescent states. o Apply other feedback from Josh Triplett, Peter Zijlstra, and Michal Hocko. Thanx, Paul ------------------------------------------------------------------------ Documentation/RCU/trace.txt | 5 +---- include/linux/llist.h | 37 +++++++++++++++++++++---------------- init/Kconfig | 14 -------------- kernel/locking/lockdep.c | 12 ++++++------ kernel/membarrier.c | 4 ++++ kernel/rcu/tiny.c | 2 -- kernel/rcu/tree.c | 35 ++++++++++++++++++----------------- kernel/rcu/tree.h | 1 - kernel/rcu/tree_exp.h | 28 +++++++++++++++++++++++++++- kernel/rcu/tree_plugin.h | 5 +++-- kernel/rcu/tree_trace.c | 3 +-- kernel/rcu/update.c | 6 ++---- lib/Kconfig.debug | 1 + 13 files changed, 84 insertions(+), 69 deletions(-)