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| author | Paul E. McKenney <paulmck@linux.ibm.com> | 2019-04-09 23:44:49 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.ibm.com> | 2019-05-28 18:06:09 +0200 |
| commit | ff3bf92d90d396e51eb78c5ecde11a994ab7a179 (patch) | |
| tree | 6ba832a9d6128bf12478f8df3b5710431d2c9668 /kernel/torture.c | |
| parent | rcutorture: Fix stutter_wait() return value and freelist checks (diff) | |
| download | linux-ff3bf92d90d396e51eb78c5ecde11a994ab7a179.tar.xz linux-ff3bf92d90d396e51eb78c5ecde11a994ab7a179.zip | |
torture: Allow inter-stutter interval to be specified
Currently, the inter-stutter interval is the same as the stutter duration,
that is, whatever number of jiffies is passed into torture_stutter_init().
This has worked well for quite some time, but the addition of
forward-progress testing to rcutorture can delay processes for several
seconds, which can triple the time that they are stuttered.
This commit therefore adds a second argument to torture_stutter_init()
that specifies the inter-stutter interval. While locktorture preserves
the current behavior, rcutorture uses the RCU CPU stall warning interval
to provide a wider inter-stutter interval.
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Diffstat (limited to 'kernel/torture.c')
| -rw-r--r-- | kernel/torture.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/torture.c b/kernel/torture.c index de0e0ecf88e1..a8d9bdfba7c3 100644 --- a/kernel/torture.c +++ b/kernel/torture.c @@ -570,6 +570,7 @@ static void torture_shutdown_cleanup(void) static struct task_struct *stutter_task; static int stutter_pause_test; static int stutter; +static int stutter_gap; /* * Block until the stutter interval ends. This must be called periodically @@ -621,7 +622,7 @@ static int torture_stutter(void *arg) } WRITE_ONCE(stutter_pause_test, 0); if (!torture_must_stop()) - schedule_timeout_interruptible(stutter); + schedule_timeout_interruptible(stutter_gap); torture_shutdown_absorb("torture_stutter"); } while (!torture_must_stop()); torture_kthread_stopping("torture_stutter"); @@ -631,9 +632,10 @@ static int torture_stutter(void *arg) /* * Initialize and kick off the torture_stutter kthread. */ -int torture_stutter_init(const int s) +int torture_stutter_init(const int s, const int sgap) { stutter = s; + stutter_gap = sgap; return torture_create_kthread(torture_stutter, NULL, stutter_task); } EXPORT_SYMBOL_GPL(torture_stutter_init); |