rcu: Distinguish between boosting and boosted
Paul E. McKenney [Thu, 4 Nov 2010 21:55:26 +0000 (14:55 -0700)]
RCU priority boosting's tracing did not distinguish between ongoing
boosting and completion of boosting.  This commit therefore adds this
capability.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

kernel/rcutiny_plugin.h

index f4e0df0..015abae 100644 (file)
@@ -229,6 +229,9 @@ static void show_tiny_preempt_stats(struct seq_file *m)
                seq_puts(m, "no");
                break;
        case 1:
+               seq_puts(m, "begun");
+               break;
+       case 2:
                seq_puts(m, "done");
                break;
        default:
@@ -284,6 +287,7 @@ static int rcu_boost(void)
        raw_local_irq_restore(flags);
        rt_mutex_lock(&mtx);
        RCU_TRACE(rcu_preempt_ctrlblk.n_tasks_boosted++);
+       rcu_preempt_ctrlblk.boosted_this_gp++;
        rt_mutex_unlock(&mtx);
        return rcu_preempt_ctrlblk.boost_tasks != NULL;
 }