linux-stable.git/include/linux/torture.h, branch v3.15.4

rcutorture: Stop generic kthreads in torture_cleanup()

2014-02-23T17:04:27+00:00

The specific torture modules (like rcutorture) need to call
torture_cleanup() in any case, so this commit makes torture_cleanup()
deal with torture_shutdown_cleanup() and torture_stutter_cleanup() so
that the specific modules don't have to deal with these details.

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

rcutorture: Abstract torture_stop_kthread()

2014-02-23T17:04:25+00:00

Stopping of kthreads is not RCU-specific, so this commit abstracts
out torture_stop_kthread(), saving a few lines of code in the process.

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

rcutorture: Abstract torture_create_kthread()

2014-02-23T17:03:24+00:00

Creation of kthreads is not RCU-specific, so this commit abstracts
out torture_create_kthread(), saving a few tens of lines of code in
the process.

This change requires modifying VERBOSE_TOROUT_ERRSTRING() to take a
non-const string, so that _torture_create_kthread() can avoid an
open-coded substitute.

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

rcutorture: Fix rcutorture shutdown races

2014-02-23T17:03:21+00:00

Not all of the rcutorture kthreads waited for kthread_should_stop()
before returning from their top-level functions, and none of them
used torture_shutdown_absorb() properly.  These problems can result in
segfaults and hangs at shutdown time, and some recent changes perturbed
timing sufficiently to make them much more probable.  This commit
therefore creates a torture_kthread_stopping() function that does the
proper kthread shutdown dance in one centralized location.

Accommodate this grouping by making VERBOSE_TOROUT_STRING() capable of
taking a non-const string as its argument, which allows the new
torture_kthread_stopping() to pass its "title" argument directly to
the updated version of VERBOSE_TOROUT_STRING().

Signed-off-by: Paul E. McKenney

rcutorture: Abstract torture_shutdown()

2014-02-23T17:03:18+00:00

Because auto-shutdown of torture testing is not specific to RCU,
this commit moves the auto-shutdown function to kernel/torture.c.

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

rcutorture: Abstract stutter_wait()

2014-02-23T17:02:54+00:00

Because stuttering the test load (stopping and restarting it) is useful
for non-RCU testing, this commit moves the load-stuttering functionality
to kernel/torture.c.

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

rcutorture: Privatize fullstop

2014-02-23T17:01:12+00:00

This commit introduces the torture_must_stop() function in order to
keep use of the fullstop variable local to kernel/torture.c.  There
is also a torture_must_stop_irq() counterpart for use from RCU callbacks,
timeout handlers, and the like.

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

rcutorture: Abstract torture_shutdown_notify()

2014-02-23T17:01:11+00:00

Because handling the race between rmmod and system shutdown is not
specific to RCU, this commit abstracts torture_shutdown_notify(),
placing this code into kernel/torture.c.  This change also allows
fullstop_mutex to be private to kernel/torture.c.

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

rcutorture: Abstract torture-test cleanup

2014-02-23T17:01:08+00:00

This commit creates a torture_cleanup() that handles the generic
cleanup actions local to kernel/torture.c.

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

rcutorture: Abstract torture-test initialization

2014-02-23T17:01:07+00:00

This commit creates torture_init_begin() and torture_init_end() functions
to abstract locking and allow the torture_type and verbose variables
in kernel/torture.o to become static.  With a bit more abstraction,
fullstop_mutex will also become static.

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