linux-dev/tools/testing/selftests/rcutorture/configs/lock, branch master

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

2019-03-26T21:42:53Z

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

2017-12-11T17:18:29Z

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

2017-01-14T10:37:14Z

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

2015-10-06T18:24:56Z

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

2015-10-06T18:24:40Z

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

2014-09-30T07:10:00Z

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

2014-09-16T20:41:43Z

Signed-off-by: Paul E. McKenney

locktorture: Add test scenario for mutex_lock

2014-09-16T20:41:42Z

Signed-off-by: Paul E. McKenney

locktorture: Make torture scripting account for new _runnable name

2014-09-16T20:41:41Z

Signed-off-by: Paul E. McKenney

locktorture: Add vestigial locktorture configuration

2014-02-23T17:04:37Z

This commit adds a trivial set of configuration files for lock torturing. Signed-off-by: Paul E. McKenney Reviewed-by: Josh Triplett