linux-kernel - [PATCH RFC tip/core/rcu 0/8] Waketorture, not for inclusion

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Date:	Wed, 15 Jun 2016 15:27:56 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...nel.org, jiangshanlai@...il.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
	josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
	rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
	dvhart@...ux.intel.com, fweisbec@...il.com, oleg@...hat.com,
	bobby.prani@...il.com
Subject: [PATCH RFC tip/core/rcu 0/8] Waketorture, not for inclusion

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(-)