From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750896AbdAXVqI (ORCPT ); Tue, 24 Jan 2017 16:46:08 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:36076 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750751AbdAXVqH (ORCPT ); Tue, 24 Jan 2017 16:46:07 -0500 Date: Tue, 24 Jan 2017 13:46:02 -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 v3 tip/core/rcu 0/6] Dynticks updates for 4.11 Reply-To: paulmck@linux.vnet.ibm.com References: <20170114085406.GA19052@linux.vnet.ibm.com> <20170118024456.GA2042@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170118024456.GA2042@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: 17012421-0008-0000-0000-0000070329E8 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00006492; HX=3.00000240; KW=3.00000007; PH=3.00000004; SC=3.00000200; SDB=6.00812180; UDB=6.00396063; IPR=6.00589597; BA=6.00005085; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00014031; XFM=3.00000011; UTC=2017-01-24 21:46:05 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17012421-0009-0000-0000-00003F488946 Message-Id: <20170124214602.GA2269@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-01-24_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-1701240129 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello! This series provides v3 of the dynticks updates: 1-4. Abstract access to the dyntick counter, replacing the current open-coding of atomic operations. 5. Check cond_resched_rcu_qs() state less often to reduce GP overhead. 6. Adjust FQS offline checks for exact online-CPU detection. Changes since v2: o Fix RCU_TRACE() statements called out by Josh Triplett. Changes since v1: o Apply feedback from Josh Triplett and Peter Zijlstra. Thanx, Paul ------------------------------------------------------------------------ include/linux/rcutiny.h | 6 + include/trace/events/rcu.h | 10 - kernel/rcu/tree.c | 241 ++++++++++++++++++++++++++++++--------------- kernel/rcu/tree.h | 2 kernel/rcu/tree_exp.h | 12 -- kernel/rcu/tree_plugin.h | 2 kernel/rcu/tree_trace.c | 2 7 files changed, 186 insertions(+), 89 deletions(-)