From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 07596C43387 for ; Wed, 9 Jan 2019 21:18:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D36A82075C for ; Wed, 9 Jan 2019 21:18:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726653AbfAIVSp (ORCPT ); Wed, 9 Jan 2019 16:18:45 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:39902 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726332AbfAIVSp (ORCPT ); Wed, 9 Jan 2019 16:18:45 -0500 Received: from pps.filterd (m0098394.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id x09LIh0n094060 for ; Wed, 9 Jan 2019 16:18:44 -0500 Received: from e16.ny.us.ibm.com (e16.ny.us.ibm.com [129.33.205.206]) by mx0a-001b2d01.pphosted.com with ESMTP id 2pwq4rmdmu-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 09 Jan 2019 16:18:42 -0500 Received: from localhost by e16.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 9 Jan 2019 21:18:37 -0000 Received: from b01cxnp22034.gho.pok.ibm.com (9.57.198.24) by e16.ny.us.ibm.com (146.89.104.203) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 9 Jan 2019 21:18:32 -0000 Received: from b01ledav003.gho.pok.ibm.com (b01ledav003.gho.pok.ibm.com [9.57.199.108]) by b01cxnp22034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x09LIUbq24838162 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 9 Jan 2019 21:18:30 GMT Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7F220B2066; Wed, 9 Jan 2019 21:18:30 +0000 (GMT) Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5E9C7B2064; Wed, 9 Jan 2019 21:18:30 +0000 (GMT) Received: from paulmck-ThinkPad-W541 (unknown [9.70.82.88]) by b01ledav003.gho.pok.ibm.com (Postfix) with ESMTP; Wed, 9 Jan 2019 21:18:30 +0000 (GMT) Received: by paulmck-ThinkPad-W541 (Postfix, from userid 1000) id 2B1DD16C63D3; Wed, 9 Jan 2019 13:18:30 -0800 (PST) Date: Wed, 9 Jan 2019 13:18:30 -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, fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org Subject: [PATCH tip/core/rcu 0/12] RCU flavor consolidation cleanups for v5.1 Reply-To: paulmck@linux.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-cbid: 19010921-0072-0000-0000-000003E73CC1 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00010374; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000274; SDB=6.01144142; UDB=6.00595707; IPR=6.00924404; MB=3.00025056; MTD=3.00000008; XFM=3.00000015; UTC=2019-01-09 21:18:35 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19010921-0073-0000-0000-00004ABF64D1 Message-Id: <20190109211830.GA30595@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-01-09_10:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=831 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1901090170 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello! This series contains additional cleanups for RCU flavor consolidation: 1-2. Replace scheduler _sched() APIs with _rcu() counterparts. 3. Renaming and commenting changes due to only one rcuo kthread per CPU. 4. Make expedited IPI handler return after handling critical section. This is a maintainability and performance change. 5. Inline force_quiescent_state() into rcu_force_quiescent_state(). 6. Eliminate RCU_BH_FLAVOR and RCU_SCHED_FLAVOR. 7. Inline rcu_kthread_do_work() into its sole remaining caller. 8. Determine expedited-GP IPI handler at build time. 9. Consolidate PREEMPT and !PREEMPT synchronize_rcu_expedited(). 10. Consolidate PREEMPT and !PREEMPT synchronize_rcu(). 11. Inline _synchronize_rcu_expedited() into synchronize_rcu_expedited(). 12. Discard separate per-CPU callback counts. Thanx, Paul ------------------------------------------------------------------------ Documentation/RCU/Design/Expedited-Grace-Periods/ExpSchedFlow.svg | 18 Documentation/RCU/Design/Expedited-Grace-Periods/Expedited-Grace-Periods.html | 26 - Documentation/RCU/stallwarn.txt | 15 kernel/rcu/rcu.h | 2 kernel/rcu/tree.c | 123 +++-- kernel/rcu/tree.h | 9 kernel/rcu/tree_exp.h | 244 ++++------ kernel/rcu/tree_plugin.h | 129 ----- kernel/sched/cpufreq.c | 4 kernel/sched/cpufreq_schedutil.c | 2 kernel/sched/sched.h | 2 kernel/sched/topology.c | 4 12 files changed, 237 insertions(+), 341 deletions(-)