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From:   "Paul E. McKenney" <paulmck@kernel.org>
To:     rcu@vger.kernel.org
Cc:     linux-kernel@vger.kernel.org, kernel-team@meta.com,
        rostedt@goodmis.org,
        "Joel Fernandes (Google)" <joel@joelfernandes.org>,
        "Paul E . McKenney" <paulmck@kernel.org>
Subject: [PATCH rcu 09/16] rcu/rcuscale: Use call_rcu_hurry() for async reader test
Date:   Wed, 30 Nov 2022 10:13:18 -0800
Message-Id: <20221130181325.1012760-9-paulmck@kernel.org>
In-Reply-To: <20221130181316.GA1012431@paulmck-ThinkPad-P17-Gen-1>
References: <20221130181316.GA1012431@paulmck-ThinkPad-P17-Gen-1>
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From: "Joel Fernandes (Google)" <joel@joelfernandes.org>

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_hurry() API instead to revert to the old behavior.

[ paulmck: Apply s/call_rcu_flush/call_rcu_hurry/ feedback from Tejun Heo. ]

Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
 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 3baded807a616..91fb5905a008f 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_hurry,
 	.gp_barrier	= rcu_barrier,
 	.sync		= synchronize_rcu,
 	.exp_sync	= synchronize_rcu_expedited,
-- 
2.31.1.189.g2e36527f23