Commit 62df63e0 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

rcu: Remove obsolete callback-invocation statistics for debugfs 



The debugfs interface displayed statistics on RCU callback invocation but
this interface has since been removed.  This commit therefore removes the
no-longer-used rcu_data structure's ->n_cbs_invoked and ->n_nocbs_invoked
fields along with 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 bec06785

kernel/rcu/tree.c

+0 −1
Original line number Diff line number Diff line
@@ -2691,7 +2691,6 @@ static void rcu_do_batch(struct rcu_state *rsp, struct rcu_data *rdp) 
	/* Update counts and requeue any remaining callbacks. */

	rcu_segcblist_insert_done_cbs(&rdp->cblist, &rcl);

	smp_mb(); /* List handling before counting for rcu_barrier(). */

	rdp->n_cbs_invoked += count;

	rcu_segcblist_insert_count(&rdp->cblist, &rcl);



	/* Reinstate batch limit if we have worked down the excess. */

kernel/rcu/tree.h

+0 −2
Original line number Diff line number Diff line
@@ -211,8 +211,6 @@ struct rcu_data { 
					/* different grace periods. */

	long		qlen_last_fqs_check;

					/* qlen at last check for QS forcing */

	unsigned long	n_cbs_invoked;	/* count of RCU cbs invoked. */

	unsigned long	n_nocbs_invoked; /* count of no-CBs RCU cbs invoked. */

	unsigned long	n_force_qs_snap;

					/* did other CPU force QS recently? */

	long		blimit;		/* Upper limit on a processed batch */

kernel/rcu/tree_plugin.h

+0 −1
Original line number Diff line number Diff line
@@ -2243,7 +2243,6 @@ static int rcu_nocb_kthread(void *arg) 
		smp_mb__before_atomic();  /* _add after CB invocation. */

		atomic_long_add(-c, &rdp->nocb_q_count);

		atomic_long_add(-cl, &rdp->nocb_q_count_lazy);

		rdp->n_nocbs_invoked += c;

	}

	return 0;

}

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