user/sven/linux.git/kernel/torture.c, branch v4.9.139

torture: Convert torture_shutdown() to hrtimer

2016-08-22T17:01:49Z

Upcoming changes to the timer wheel introduce significant inaccuracy and possibly also an ultimate limit on timeout duration. This is a problem for the current implementation of torture_shutdown() because (1) shutdown times are user-specified, and can therefore be quite long, and (2) the torture scripting will kill a test instance that runs for more than a few minutes longer than scheduled. This commit therefore converts the torture_shutdown() timed waits to an hrtimer, thus avoiding too-short torture test runs as well as death by scripting. Signed-off-by: Paul E. McKenney Acked-by: Arnd Bergmann

torture: Stop onoff task if there is only one cpu

2016-06-14T23:03:28Z

If the whole system has only one cpu, that cpu won't be able to be offlined, so there is no need onoff task is stil running. Signed-off-by: Boqun Feng Signed-off-by: Paul E. McKenney

torture: Break online and offline functions out of torture_onoff()

2016-06-14T23:02:16Z

This commit breaks torture_online() and torture_offline() out of torture_onoff() in preparation for allowing waketorture finer-grained control of its CPU-hotplug workload. Signed-off-by: Paul E. McKenney

rcutorture: Dump trace buffer upon shutdown

2016-04-21T20:47:04Z

When running from the scripts, rcutorture is completely headless, so there is no way to to manually dump the trace buffer. This commit therefore unconditionally dumps the trace buffer upon timed shutdown. However, if you are using rmmod to end the test, it is still up to you to manually dump the trace buffer. Signed-off-by: Paul E. McKenney

torture: Clarify refusal to run more than one torture test

2016-03-31T20:39:52Z

This commit clarifies error messages -- you only get to run one torture test at a time! Signed-off-by: Paul E. McKenney

torture: Consolidate cond_resched_rcu_qs() into stutter_wait()

2015-10-06T18:25:01Z

This commit moves cond_resched_rcu_qs() into stutter_wait(), saving a line and also avoiding RCU CPU stall warnings from all torture loops containing a stutter_wait(). Signed-off-by: Paul E. McKenney Reviewed-by: Josh Triplett

rcu: Convert ACCESS_ONCE() to READ_ONCE() and WRITE_ONCE()

2015-05-27T19:56:15Z

This commit moves from the old ACCESS_ONCE() API to the new READ_ONCE() and WRITE_ONCE() APIs. Signed-off-by: Paul E. McKenney [ paulmck: Updated to include kernel/torture.c as suggested by Jason Low. ]

torture: Address race in module cleanup

2014-09-16T20:41:06Z

When performing module cleanups by calling torture_cleanup() the 'torture_type' string in nullified However, callers are not necessarily done, and might still need to reference the variable. This impacts both rcutorture and locktorture, causing printing things like: [ 94.226618] (null)-torture: Stopping lock_torture_writer task [ 94.226624] (null)-torture: Stopping lock_torture_stats task Thus delay this operation until the very end of the cleanup process. The consequence (which shouldn't matter for this kid of program) is, of course, that we delay the window between rmmod and modprobing, for instance in module_torture_begin(). Signed-off-by: Davidlohr Bueso Signed-off-by: Paul E. McKenney

rcu: Use pr_alert/pr_cont for printing logs

2014-09-07T23:24:47Z

User pr_alert/pr_cont for printing the logs from rcutorture module directly instead of writing it to a buffer and then printing it. This allows us from not having to allocate such buffers. Also remove a resulting empty function. I tested this using the parse-torture.sh script as follows: $ dmesg | grep torture > log.txt $ bash parse-torture.sh log.txt test $ There were no warnings which means that parsing went fine. Signed-off-by: Joe Perches Signed-off-by: Pranith Kumar Signed-off-by: Paul E. McKenney

torture: Avoid format string leak to thead name

2014-07-07T17:12:56Z

Since the torture-test thread creation interface does not include format string arguments, this commit makes sure the name can never be accidentally processed as a format string. Signed-off-by: Kees Cook Signed-off-by: Paul E. McKenney Reviewed-by: Josh Triplett