From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753426AbcFOW2F (ORCPT ); Wed, 15 Jun 2016 18:28:05 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:32258 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752137AbcFOW2B (ORCPT ); Wed, 15 Jun 2016 18:28:01 -0400 X-IBM-Helo: d01dlp02.pok.ibm.com X-IBM-MailFrom: paulmck@linux.vnet.ibm.com X-IBM-RcptTo: linux-kernel@vger.kernel.org Date: Wed, 15 Jun 2016 15:27:56 -0700 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 RFC tip/core/rcu 0/8] Waketorture, not for inclusion 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-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16061522-0056-0000-0000-00000088235F X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16061522-0057-0000-0000-000004A17F10 Message-Id: <20160615222756.GA10695@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-06-15_13:,, 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=8.0.1-1604210000 definitions=main-1606150236 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello! And for your amusement, this series provides a waketorture module. It is intended to increase the probability of a heisenbug or three I have been chasing for longer than I care to admit. Should it someday actually significantly increase that probability, I might consider submitting it for acceptance. In the meantime, for your amusement: 1. Add a wakeup-torture module. 2. Update scripting to accommodate waketorture. 3. Don't kick kthreads unless grace period or request. 4. Add utilization measurement. 5. Add hrtimer support for fine-grained event scheduling. 6. Make waketorture always hotplug the same CPU. 7. Make waketorture kill test if no hotpluggable CPUs. 8. Affinity waiter tasks away from hotpluggable CPU. Thanx, Paul ------------------------------------------------------------------------ kernel/rcu/Makefile | 3 kernel/rcu/tree.c | 3 kernel/rcu/waketorture.c | 567 +++++++++- lib/Kconfig.debug | 18 tools/testing/selftests/rcutorture/bin/kvm-recheck-wake.sh | 39 tools/testing/selftests/rcutorture/bin/kvm-recheck.sh | 2 tools/testing/selftests/rcutorture/bin/kvm.sh | 2 tools/testing/selftests/rcutorture/configs/wake/CFLIST | 1 tools/testing/selftests/rcutorture/configs/wake/CFcommon | 2 tools/testing/selftests/rcutorture/configs/wake/SH | 19 tools/testing/selftests/rcutorture/configs/wake/SH.boot | 1 tools/testing/selftests/rcutorture/configs/wake/STI | 19 tools/testing/selftests/rcutorture/configs/wake/STI.boot | 1 tools/testing/selftests/rcutorture/configs/wake/ver_functions.sh | 43 14 files changed, 701 insertions(+), 19 deletions(-)