Commit bec06785 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

rcu: Remove obsolete boost statistics for debugfs 



The debugfs interface displayed statistics on RCU priority boosting,
but this interface has since been removed.  This commit therefore
removes the no-longer-used rcu_data structure's ->n_tasks_boosted,
->n_exp_boosts, and ->n_exp_boosts and their updates.

If this information proves necessary in the future, the corresponding
event traces will be added.

Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent 3caa973b

kernel/rcu/tree.h

+0 −6
Original line number Diff line number Diff line
@@ -146,12 +146,6 @@ struct rcu_node { 
				/*  boosting for this rcu_node structure. */

	unsigned int boost_kthread_status;

				/* State of boost_kthread_task for tracing. */

	unsigned long n_tasks_boosted;

				/* Total number of tasks boosted. */

	unsigned long n_exp_boosts;

				/* Number of tasks boosted for expedited GP. */

	unsigned long n_normal_boosts;

				/* Number of tasks boosted for normal GP. */

#ifdef CONFIG_RCU_NOCB_CPU

	struct swait_queue_head nocb_gp_wq[2];

				/* Place for rcu_nocb_kthread() to wait GP. */

kernel/rcu/tree_plugin.h

+2 −6
Original line number Diff line number Diff line
@@ -963,14 +963,10 @@ static int rcu_boost(struct rcu_node *rnp) 
	 * expedited grace period must boost all blocked tasks, including

	 * those blocking the pre-existing normal grace period.

	 */

	if (rnp->exp_tasks != NULL) {

	if (rnp->exp_tasks != NULL)

		tb = rnp->exp_tasks;

		rnp->n_exp_boosts++;

	} else {

	else

		tb = rnp->boost_tasks;

		rnp->n_normal_boosts++;

	}

	rnp->n_tasks_boosted++;



	/*

	 * We boost task t by manufacturing an rt_mutex that appears to

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