kernel.git/tools/testing/selftests/rcutorture, branch linux-4.5.y

torture: Place console.log files correctly from the get-go

2015-12-06T01:58:34Z

Currently, the console output files ("console.log") are placed in the build directory initially, then copied to the results directory. One problem with this is if a qemu refuses to die in a timely fashion after a kernel hang, it will continue to write after the next qemu starts up, resulting in confusing output from the old instance of qemu. This commit prevents such confusion by placing the console.log files into the results directory to begin with, so that a given instance of qemu is always writing only to its own console.log file. Signed-off-by: Paul E. McKenney Reviewed-by: Josh Triplett

torture: Abbreviate console error dump

2015-12-06T01:58:31Z

Currently, the scripts print a list of warning/bug indicators from the console.log file. This works well if there are only a few warnings or bugs, but can be quite annoying if there is a large number. This commit therefore prints a summary listing the number of each type of warning/bug indicator, but only if there is at least one such indicator. The full list is stored in the results directory at console.log.diags, which makes it easier to find the warning/bugs in the full console.log. Signed-off-by: Paul E. McKenney Reviewed-by: Josh Triplett

rcutorture: Remove CONFIG_RCU_USER_QS from rcutorture selftest doc

2015-12-06T01:58:16Z

Commit d1ec4c34c7a9 ("rcu: Drop RCU_USER_QS in favor of NO_HZ_FULL") has removed RCU_USER_QS from Kconfig file, so remove it from some documents to avoid any confusion. Signed-off-by: Yang Shi Signed-off-by: Paul E. McKenney Acked-by: Frederic Weisbecker Reviewed-by: Josh Triplett

rcutorture: Default grace period to three minutes, allow override

2015-12-06T01:58:12Z

The default test grace period of two minutes is insufficient in some cases and excessive in others. This commit therefore increases the default to three minutes, but also adds a --shutdown-grace parameter to allow the default to be overridden. Signed-off-by: Paul E. McKenney Reviewed-by: Josh Triplett

rcutorture: Add batch number to script printout

2015-12-06T01:57:55Z

Currently, the scripts print "----Start batch" at the beginning of each batch, which does serve as a good visual delimiter between batches. Unfortunately, if there are a lot of batches, it is hard to quickly estimate test runtime from the output of "--dryrun sched". This commit therefore adds a batch number, so that the beginning-of-batch output looks like this "----Start batch 10" for the tenth batch. Signed-off-by: Paul E. McKenney Reviewed-by: Josh Triplett

Merge branches 'doc.2015.10.06a', 'percpu-rwsem.2015.10.06a' and 'torture.2015.10.06a' into HEAD

2015-10-07T23:06:25Z

doc.2015.10.06a: Documentation updates. percpu-rwsem.2015.10.06a: Optimization of per-CPU reader-writer semaphores. torture.2015.10.06a: Torture-test updates.

torture: Forgive non-plural arguments

2015-10-06T18:28:26Z

This commit allows --bootarg instead of --bootargs, --config instead of --configs, and --qemu-arg instead of --qemu-args. For those cases where a native English speaker might auto-correct the argument to be incorrect. Signed-off-by: Paul E. McKenney Reviewed-by: Josh Triplett

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

Merge branches 'doc.2015.07.15a' and 'torture.2015.07.15a' into HEAD

2015-08-04T15:42:02Z

doc.2015.07.15a: Documentation updates. torture.2015.07.15a: Torture-test updates.