rcutorture: Announce task creation

A few "stealth-start rcutorture kthreads" have accumulated over the years,
so this commit adds console-log announcements (but only if the torture
tests are running verbose).

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>

kernel/rcu/rcutorture.c

@@ -1120,6 +1120,7 @@ static int __init rcu_torture_stall_init(void)
 
 	if (stall_cpu <= 0)
 		return 0;
+	VERBOSE_TOROUT_STRING("Creating rcu_torture_stall task");
 	stall_task = kthread_run(rcu_torture_stall, NULL, "rcu_torture_stall");
 	if (IS_ERR(stall_task)) {
 		ret = PTR_ERR(stall_task);
@@ -1242,6 +1243,7 @@ static int rcu_torture_barrier_init(void)
 		return -ENOMEM;
 	for (i = 0; i < n_barrier_cbs; i++) {
 		init_waitqueue_head(&barrier_cbs_wq[i]);
+		VERBOSE_TOROUT_STRING("Creating rcu_torture_barrier_cbs task");
 		barrier_cbs_tasks[i] = kthread_run(rcu_torture_barrier_cbs,
 						   (void *)(long)i,
 						   "rcu_torture_barrier_cbs");
@@ -1253,6 +1255,7 @@ static int rcu_torture_barrier_init(void)
 		}
 		torture_shuffle_task_register(barrier_cbs_tasks[i]);
 	}
+	VERBOSE_TOROUT_STRING("Creating rcu_torture_barrier task");
 	barrier_task = kthread_run(rcu_torture_barrier, NULL,
 				   "rcu_torture_barrier");
 	if (IS_ERR(barrier_task)) {
@@ -1606,6 +1609,7 @@ rcu_torture_init(void)
 		fqs_duration = 0;
 	if (fqs_duration) {
 		/* Create the fqs thread */
+		VERBOSE_TOROUT_STRING("Creating rcu_torture_fqs task");
 		fqs_task = kthread_run(rcu_torture_fqs, NULL,
 				       "rcu_torture_fqs");
 		if (IS_ERR(fqs_task)) {

kernel/torture.c

@@ -187,6 +187,7 @@ int torture_onoff_init(long ooholdoff, long oointerval)
 	onoff_interval = oointerval;
 	if (onoff_interval <= 0)
 		return 0;
+	VERBOSE_TOROUT_STRING("Creating torture_onoff task");
 	onoff_task = kthread_run(torture_onoff, NULL, "torture_onoff");
 	if (IS_ERR(onoff_task)) {
 		ret = PTR_ERR(onoff_task);
@@ -390,6 +391,7 @@ int torture_shuffle_init(long shuffint)
 	}
 
 	/* Create the shuffler thread */
+	VERBOSE_TOROUT_STRING("Creating torture_shuffle task");
 	shuffler_task = kthread_run(torture_shuffle, NULL, "torture_shuffle");
 	if (IS_ERR(shuffler_task)) {
 		ret = PTR_ERR(shuffler_task);
@@ -486,6 +488,7 @@ int torture_shutdown_init(int ssecs, void (*cleanup)(void))
 	shutdown_secs = ssecs;
 	torture_shutdown_hook = cleanup;
 	if (shutdown_secs > 0) {
+		VERBOSE_TOROUT_STRING("Creating torture_shutdown task");
 		shutdown_time = jiffies + shutdown_secs * HZ;
 		shutdown_task = kthread_create(torture_shutdown, NULL,
 					       "torture_shutdown");
@@ -592,6 +595,7 @@ int torture_stutter_init(int s)
 	int ret;
 
 	stutter = s;
+	VERBOSE_TOROUT_STRING("Creating torture_stutter task");
 	stutter_task = kthread_run(torture_stutter, NULL, "torture_stutter");
 	if (IS_ERR(stutter_task)) {
 		ret = PTR_ERR(stutter_task);