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Commit 6cd534ef authored by Paul E. McKenney's avatar Paul E. McKenney
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rcu: Don't scan root rcu_node structure for stalled tasks 



Now that blocked tasks are no longer migrated to the root rcu_node
structure, there is no need to scan the root rcu_node structure for
blocked tasks stalling the current grace period.  This commit therefore
removes this scan.

Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent abaf3f9d

kernel/rcu/tree.c

+0 −9
Original line number Diff line number Diff line
@@ -1107,15 +1107,6 @@ static void print_other_cpu_stall(struct rcu_state *rsp) 
		raw_spin_unlock_irqrestore(&rnp->lock, flags);

	}



	/*

	 * Now rat on any tasks that got kicked up to the root rcu_node

	 * due to CPU offlining.

	 */

	rnp = rcu_get_root(rsp);

	raw_spin_lock_irqsave(&rnp->lock, flags);

	ndetected += rcu_print_task_stall(rnp);

	raw_spin_unlock_irqrestore(&rnp->lock, flags);



	print_cpu_stall_info_end();

	for_each_possible_cpu(cpu)

		totqlen += per_cpu_ptr(rsp->rda, cpu)->qlen;