Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 285fe294 authored by Paul E. McKenney's avatar Paul E. McKenney Committed by Paul E. McKenney
Browse files

rcu: Fix detection of abruptly-ending stall 



The code that attempts to identify stalls that end just as we detect
them is broken by both flavors of initialization failure.  This commit
therefore properly initializes and computes the count of the number
of reasons why the RCU grace period is stalled.

Signed-off-by: default avatarPaul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: default avatarJosh Triplett <josh@joshtriplett.org>
parent cba6d0d6

kernel/rcutree.c

+2 −2
Original line number Diff line number Diff line
@@ -733,7 +733,7 @@ static void print_other_cpu_stall(struct rcu_state *rsp) 
	int cpu;

	long delta;

	unsigned long flags;

	int ndetected;

	int ndetected = 0;

	struct rcu_node *rnp = rcu_get_root(rsp);



	/* Only let one CPU complain about others per time interval. */
@@ -774,7 +774,7 @@ static void print_other_cpu_stall(struct rcu_state *rsp) 
	 */

	rnp = rcu_get_root(rsp);

	raw_spin_lock_irqsave(&rnp->lock, flags);

	ndetected = rcu_print_task_stall(rnp);

	ndetected += rcu_print_task_stall(rnp);

	raw_spin_unlock_irqrestore(&rnp->lock, flags);



	print_cpu_stall_info_end();