[1/3] rcu-tasks: Add printk()s to localize boot-time self-test hang
Commit Message
From: "Paul E. McKenney" <paulmck@kernel.org>
Currently, rcu_tasks_initiate_self_tests() prints a message and then
initiates self tests on up to three different RCU Tasks flavors. If one
of the flavors has a grace-period hang, it is not easy to work out which
of the three hung. This commit therefore prints a message prior to each
individual test.
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
---
kernel/rcu/tasks.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
@@ -1979,20 +1979,22 @@ static void test_rcu_tasks_callback(struct rcu_head *rhp)
static void rcu_tasks_initiate_self_tests(void)
{
- pr_info("Running RCU-tasks wait API self tests\n");
#ifdef CONFIG_TASKS_RCU
+ pr_info("Running RCU Tasks wait API self tests\n");
tests[0].runstart = jiffies;
synchronize_rcu_tasks();
call_rcu_tasks(&tests[0].rh, test_rcu_tasks_callback);
#endif
#ifdef CONFIG_TASKS_RUDE_RCU
+ pr_info("Running RCU Tasks Rude wait API self tests\n");
tests[1].runstart = jiffies;
synchronize_rcu_tasks_rude();
call_rcu_tasks_rude(&tests[1].rh, test_rcu_tasks_callback);
#endif
#ifdef CONFIG_TASKS_TRACE_RCU
+ pr_info("Running RCU Tasks Trace wait API self tests\n");
tests[2].runstart = jiffies;
synchronize_rcu_tasks_trace();
call_rcu_tasks_trace(&tests[2].rh, test_rcu_tasks_callback);