[PATCH rcu 10/14] rcu/rcuscale: Use call_rcu_flush() for async reader test

From: Paul E. McKenney
Date: Wed Oct 19 2022 - 18:52:42 EST


From: "Joel Fernandes (Google)" <joel@xxxxxxxxxxxxxxxxx>

rcuscale uses call_rcu() to queue async readers. With recent changes to
save power, the test will have fewer async readers in flight. Use the
call_rcu_flush() API instead to revert to the old behavior.

Signed-off-by: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
---
kernel/rcu/rcuscale.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/rcu/rcuscale.c b/kernel/rcu/rcuscale.c
index bbdcac1804ec8..0385e9b123998 100644
--- a/kernel/rcu/rcuscale.c
+++ b/kernel/rcu/rcuscale.c
@@ -176,7 +176,7 @@ static struct rcu_scale_ops rcu_ops = {
.get_gp_seq = rcu_get_gp_seq,
.gp_diff = rcu_seq_diff,
.exp_completed = rcu_exp_batches_completed,
- .async = call_rcu,
+ .async = call_rcu_flush,
.gp_barrier = rcu_barrier,
.sync = synchronize_rcu,
.exp_sync = synchronize_rcu_expedited,
--
2.31.1.189.g2e36527f23