From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751441AbdLATVe (ORCPT ); Fri, 1 Dec 2017 14:21:34 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:33654 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750965AbdLATVd (ORCPT ); Fri, 1 Dec 2017 14:21:33 -0500 Date: Fri, 1 Dec 2017 11:21:22 -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 Subject: [PATCH tip/core/rcu 0/10] Don not IPI offline CPUs, de-emphasize cond_resched_rcu_qs() 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-cbid: 17120119-0052-0000-0000-0000028AEAAF X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00008137; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000243; SDB=6.00953989; UDB=6.00482079; IPR=6.00734065; BA=6.00005726; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00018295; XFM=3.00000015; UTC=2017-12-01 19:21:26 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17120119-0053-0000-0000-000052C9AFD3 Message-Id: <20171201192122.GA19301@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-12-01_05:,, 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 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1712010225 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello! This series provides some fixes to prevent sending IPIs to offline CPUs and also replaces most uses of cond_resched_rcu_qs() with the new and improved cond_resched(). There are still a few remaining uses of cond_resched_rcu_qs() in rcutorture because the mechanisms that strengthen cond_resched() rely on RCU making forward progress. This series contains: 1. Stop resched_cpu() from sending IPIs to offline CPUs. 2. Stop switched_to_rt() from sending IPIs to offline CPUs. 3. Move netfilter from cond_resched_rcu_qs() to cond_resched(). 4. Move mm from cond_resched_rcu_qs() to cond_resched(). 5. Move workqueue from cond_resched_rcu_qs() to cond_resched(). 6. Move trace from cond_resched_rcu_qs() to cond_resched(). 7. Move softirq from cond_resched_rcu_qs() to cond_resched(). 8. Move fs from cond_resched_rcu_qs() to cond_resched(). 9. Remove cond_resched_rcu_qs() from documentation. 10. Improve performance by accounting for rcu_all_qs() in cond_resched(). Thanx, Paul ------------------------------------------------------------------------ Documentation/RCU/Design/Data-Structures/Data-Structures.html | 3 ++- Documentation/RCU/Design/Requirements/Requirements.html | 4 ++-- Documentation/RCU/stallwarn.txt | 10 ++++------ fs/file.c | 2 +- include/linux/rcupdate.h | 2 +- kernel/sched/core.c | 3 ++- kernel/sched/rt.c | 2 +- kernel/softirq.c | 2 +- kernel/trace/trace_benchmark.c | 2 +- kernel/workqueue.c | 2 +- mm/mlock.c | 2 +- net/netfilter/nf_conntrack_core.c | 2 +- 12 files changed, 18 insertions(+), 18 deletions(-)