linux-toradex.git/tools/testing/selftests/rcutorture/configs/lock, branch master

torture: Place --bootargs parameters at end of -append list

2023-07-14T22:10:57+00:00

Currently, the kernel boot parameters specified by the kvm.sh --bootargs
parameter are placed near the beginning of the -append list that is
passed to qemu.  This means that in the not-uncommon case of a kernel
boot parameter where the last argument wins, the --bootargs list overrides
neither the list in the .boot file nor the additional parameters supplied
by the rcutorture scripting.

This commit therefore places the kernel boot parameters specified by
the kvm.sh --bootargs parameter at the end of qemu's -append list.

Signed-off-by: Paul E. McKenney

locktorture: Add nested locking to rtmutex torture tests

2023-03-07T18:13:57+00:00

This patch adds randomized nested locking to the rtmutex torture
tests. Additionally it adds LOCK09 config files for testing
rtmutexes with nested locking.

Cc: Davidlohr Bueso 
Cc: "Paul E. McKenney" 
Cc: Josh Triplett 
Cc: Joel Fernandes 
Cc: Juri Lelli 
Cc: Valentin Schneider 
Cc: Dietmar Eggemann 
Cc: kernel-team@android.com
Reviewed-by: Davidlohr Bueso 
Co-developed-by: Connor O'Brien 
Signed-off-by: Connor O'Brien 
Signed-off-by: John Stultz 
Signed-off-by: Paul E. McKenney

locktorture: Add nested locking to mutex torture tests

2023-03-07T18:13:57+00:00

This patch adds randomized nested locking to the mutex torture
tests, as well as new LOCK08 config files for testing mutexes
with nested locking

Cc: Davidlohr Bueso 
Cc: "Paul E. McKenney" 
Cc: Josh Triplett 
Cc: Joel Fernandes 
Cc: Juri Lelli 
Cc: Valentin Schneider 
Cc: Dietmar Eggemann 
Cc: kernel-team@android.com
Reviewed-by: Davidlohr Bueso 
Co-developed-by: Connor O'Brien 
Signed-off-by: Connor O'Brien 
Signed-off-by: John Stultz 
Signed-off-by: Paul E. McKenney

tools/.../rcutorture: Convert to SPDX license identifier

2019-03-26T21:42:53+00:00

Replace the license boiler plate with a SPDX license identifier.
While in the area, update an email address and add copyright notices.

Signed-off-by: Paul E. McKenney

torture: Eliminate torture_runnable and perf_runnable

2017-12-11T17:18:29+00:00

The purpose of torture_runnable is to allow rcutorture and locktorture
to be started and stopped via sysfs when they are built into the kernel
(as in not compiled as loadable modules).  However, the 0444 permissions
for both instances of torture_runnable prevent this use case from ever
being put into practice.  Given that there have been no complaints
about this deficiency, it is reasonable to conclude that no one actually
makes use of this sysfs capability.  The perf_runnable module parameter
for rcuperf is in the same situation.

This commit therefore removes both torture_runnable instances as well
as perf_runnable.

Reported-by: Thomas Gleixner 
Signed-off-by: Paul E. McKenney

locking/ww_mutex: Add ww_mutex to locktorture test

2017-01-14T10:37:14+00:00

Although ww_mutexes degenerate into mutexes, it would be useful to
torture the deadlock handling between multiple ww_mutexes in addition to
torturing the regular mutexes.

Signed-off-by: Chris Wilson 
Signed-off-by: Peter Zijlstra (Intel) 
Cc: Andrew Morton 
Cc: Linus Torvalds 
Cc: Maarten Lankhorst 
Cc: Nicolai Hähnle 
Cc: Paul E. McKenney 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/20161201114711.28697-3-chris@chris-wilson.co.uk
Signed-off-by: Ingo Molnar

locktorture: Add torture tests for percpu_rwsem

2015-10-06T18:24:56+00:00

This commit adds percpu_rwsem tests based on the earlier rwsem tests.

Signed-off-by: Paul E. McKenney 
Cc: Oleg Nesterov 
Cc: Davidlohr Bueso 
Reviewed-by: Josh Triplett

locktorture: Support rtmutex torturing

2015-10-06T18:24:40+00:00

Real time mutexes is one of the few general primitives
that we do not have in locktorture. Address this -- a few
considerations:

o To spice things up, enable competing thread(s) to become
rt, such that we can stress different prio boosting paths
in the rtmutex code. Introduce a ->task_boost callback,
only used by rtmutex-torturer. Tasks will boost/deboost
around every 50k (arbitrarily) lock/unlock operations.

o Hold times are similar to what we have for other locks:
only occasionally having longer hold times (per ~200k ops).
So we roughly do two full rt boost+deboosting ops with
short hold times.

Signed-off-by: Davidlohr Bueso 
Signed-off-by: Paul E. McKenney 
Reviewed-by: Josh Triplett

locktorture: Support rwlocks

2014-09-30T07:10:00+00:00

Add a "rw_lock" torture test to stress kernel rwlocks and their irq
variant. Reader critical regions are 5x longer than writers. As such
a similar ratio of lock acquisitions is seen in the statistics. In the
case of massive contention, both hold the lock for 1/10 of a second.

Signed-off-by: Davidlohr Bueso 
Signed-off-by: Paul E. McKenney

locktorture: Add test scenario for rwsem_lock

2014-09-16T20:41:43+00:00

Signed-off-by: Paul E. McKenney