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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 30 May 2019 15:52:03 +0100 Received: from b01ledav003.gho.pok.ibm.com (b01ledav003.gho.pok.ibm.com [9.57.199.108]) by b01cxnp23034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x4UEq2Cu30933256 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 30 May 2019 14:52:02 GMT Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C7B47B2065; Thu, 30 May 2019 14:52:02 +0000 (GMT) Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A99C3B2064; Thu, 30 May 2019 14:52:02 +0000 (GMT) Received: from paulmck-ThinkPad-W541 (unknown [9.70.82.216]) by b01ledav003.gho.pok.ibm.com (Postfix) with ESMTP; Thu, 30 May 2019 14:52:02 +0000 (GMT) Received: by paulmck-ThinkPad-W541 (Postfix, from userid 1000) id 6EC0616C373B; Thu, 30 May 2019 07:52:04 -0700 (PDT) Date: Thu, 30 May 2019 07:52:04 -0700 From: "Paul E. McKenney" To: rcu@vger.kernel.org Cc: linux-kernel@vger.kernel.org, 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] 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: 19053014-0040-0000-0000-000004F681C7 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00011185; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000286; SDB=6.01210783; UDB=6.00636156; IPR=6.00991817; MB=3.00027120; MTD=3.00000008; XFM=3.00000015; UTC=2019-05-30 14:52:07 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19053014-0041-0000-0000-000009029C18 Message-Id: <20190530145204.GA28526@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-05-30_08:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=13 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=853 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1905300106 Sender: rcu-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org Hello! This series provides yet more cleanups and fixes for the RCU flavor consolidation effort: 1. Enable elimination of Tree-RCU softirq processing, courtesy of Sebastian Andrzej Siewior. (More along the lines of real-time than consolidation, but placed here to avoid conflicts.) 2. Check for wakeup-safe conditions in rcu_read_unlock_special(). 3. Only do rcu_read_unlock_special() wakeups if expedited. 4. Allow rcu_read_unlock_special() to raise_softirq() if in_irq(). 5. Use irq_work to get scheduler's attention in clean context. 6. Inline invoke_rcu_callbacks() into its sole remaining caller. 7. Avoid self-IPI in sync_rcu_exp_select_node_cpus(). 8. Avoid self-IPI in sync_sched_exp_online_cleanup(). 9. Add assertion to check if in an interrupt, courtesy of Joel Fernandes. 10. Add checks for dynticks counters in rcu_is_cpu_rrupt_from_idle(), courtesy of Joel Fernandes. 11. Rename rcu_data's ->deferred_qs to ->exp_deferred_qs. 12. Remove unused rdp local from synchronize_rcu_expedited(), courtesy of Jiang Biao. Thanx, Paul ------------------------------------------------------------------------ Documentation/admin-guide/kernel-parameters.txt | 6 include/linux/lockdep.h | 7 include/linux/sched.h | 2 kernel/rcu/tree.c | 179 +++++++++++++++++---- kernel/rcu/tree.h | 6 kernel/rcu/tree_exp.h | 50 ++++- kernel/rcu/tree_plugin.h | 201 +++++++----------------- 7 files changed, 267 insertions(+), 184 deletions(-)