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Commit 2fdbb31b authored by Paul E. McKenney's avatar Paul E. McKenney Committed by Paul E. McKenney
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rcu: Add RCU_FAST_NO_HZ tracing for idle exit 



Traces of rcu_prep_idle events can be confusing because
rcu_cleanup_after_idle() does no tracing.  This commit therefore adds
this tracing.

Signed-off-by: default avatarPaul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent 66f75a5d

include/trace/events/rcu.h

+1 −0
Original line number Diff line number Diff line
@@ -292,6 +292,7 @@ TRACE_EVENT(rcu_dyntick, 
 *	"More callbacks": Still more callbacks, try again to clear them out.

 *	"Callbacks drained": All callbacks processed, off to dyntick idle!

 *	"Timer": Timer fired to cause CPU to continue processing callbacks.

 *	"Cleanup after idle": Idle exited, timer canceled.

 */

TRACE_EVENT(rcu_prep_idle,

kernel/rcutree_plugin.h

+1 −0
Original line number Diff line number Diff line
@@ -2085,6 +2085,7 @@ static void rcu_prepare_for_idle_init(int cpu) 
static void rcu_cleanup_after_idle(int cpu)

{

	hrtimer_cancel(&per_cpu(rcu_idle_gp_timer, cpu));

	trace_rcu_prep_idle("Cleanup after idle");

}



/*