Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754452AbcKNQ46 (ORCPT ); Mon, 14 Nov 2016 11:56:58 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:45706 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752253AbcKNQ4z (ORCPT ); Mon, 14 Nov 2016 11:56:55 -0500 Date: Mon, 14 Nov 2016 08:56:48 -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: [PATCH tip/core/rcu 0/7] Miscellaneous fixes for 4.10 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-TM-AS-GCONF: 00 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16111416-0008-0000-0000-000006133D3C X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00006077; HX=3.00000240; KW=3.00000007; PH=3.00000004; SC=3.00000189; SDB=6.00780603; UDB=6.00376436; IPR=6.00558103; BA=6.00004878; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00013321; XFM=3.00000011; UTC=2016-11-14 16:56:53 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16111416-0009-0000-0000-00003D00509F Message-Id: <20161114165648.GA15216@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-11-14_10:,, 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=8.0.1-1609300000 definitions=main-1611140342 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1214 Lines: 36 Hello! This series contains miscellaneous fixes to RCU: 1. Tighten up __call_rcu's alignment check for the rcu_head structure now that no arch does two-byte alignment of pointers. 2. Remove obsolete comment about when rcu_check_callbacks() was invoked. 3. Remove obsolete comment about which function opportunistically notes grace periods beginnings and endings. 4. Update the RCU_TRACE Kconfig option's help text to note that it enables event tracing in addition to debugfs, courtesy of Nikolay Borisov. 5. Add event tracing for long read-side delays in rcutorture in order to better debug too-short grace periods. 6. Make expedited grace periods recheck dyntick-idle state to avoid sending needless IPIs. 7. Don't kick CPUs unless there is grace-period activity currently in progress. Thanx, Paul ------------------------------------------------------------------------ include/trace/events/rcu.h | 5 ++++- kernel/rcu/rcutorture.c | 11 ++++++++++- kernel/rcu/tree.c | 17 ++++++----------- kernel/rcu/tree.h | 1 + kernel/rcu/tree_exp.h | 12 +++++++++++- lib/Kconfig.debug | 3 ++- 6 files changed, 34 insertions(+), 15 deletions(-)