Commit 3480d677 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

locktorture: Track time of last ->writeunlock() 



This commit adds a last_lock_release variable that tracks the time of
the last ->writeunlock() call, which allows easier diagnosing of lock
hangs when using a kernel debugger.

Acked-by: default avatarDavidlohr Bueso <dbueso@suse.de>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 08c79742

kernel/locking/locktorture.c

+2 −0
Original line number Diff line number Diff line
@@ -60,6 +60,7 @@ static struct task_struct **reader_tasks; 


static bool lock_is_write_held;

static bool lock_is_read_held;

static unsigned long last_lock_release;



struct lock_stress_stats {

	long n_lock_fail;
@@ -632,6 +633,7 @@ static int lock_torture_writer(void *arg) 
		lwsp->n_lock_acquired++;

		cxt.cur_ops->write_delay(&rand);

		lock_is_write_held = false;

		WRITE_ONCE(last_lock_release, jiffies);

		cxt.cur_ops->writeunlock();



		stutter_wait("lock_torture_writer");