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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	[thread overview]
Message-ID: <20221130181325.1012760-9-paulmck@kernel.org> (raw)
In-Reply-To: <20221130181316.GA1012431@paulmck-ThinkPad-P17-Gen-1>

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


  parent reply	other threads:[~2022-11-30 18:13 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-11-30 18:13 [PATCH v3 rcu 0/16] Lazy call_rcu() updates for v6.2 Paul E. McKenney
2022-11-30 18:13 ` [PATCH rcu 01/16] rcu: Simplify rcu_init_nohz() cpumask handling Paul E. McKenney
2022-11-30 18:13 ` [PATCH rcu 02/16] rcu: Fix late wakeup when flush of bypass cblist happens Paul E. McKenney
2022-11-30 18:13 ` [PATCH rcu 03/16] rcu: Fix missing nocb gp wake on rcu_barrier() Paul E. McKenney
2022-11-30 18:13 ` [PATCH rcu 04/16] rcu: Make call_rcu() lazy to save power Paul E. McKenney
2022-11-30 18:13 ` [PATCH rcu 05/16] rcu: Refactor code a bit in rcu_nocb_do_flush_bypass() Paul E. McKenney
2022-11-30 18:13 ` [PATCH rcu 06/16] rcu: Shrinker for lazy rcu Paul E. McKenney
2022-11-30 18:13 ` [PATCH rcu 07/16] rcuscale: Add laziness and kfree tests Paul E. McKenney
2022-11-30 18:13 ` [PATCH rcu 08/16] rcu/sync: Use call_rcu_hurry() instead of call_rcu Paul E. McKenney
2022-11-30 18:13 ` Paul E. McKenney [this message]
2022-11-30 18:13 ` [PATCH rcu 10/16] rcu/rcutorture: Use call_rcu_hurry() where needed Paul E. McKenney
2022-11-30 18:13 ` [PATCH rcu 11/16] scsi/scsi_error: Use call_rcu_hurry() instead of call_rcu() Paul E. McKenney
2022-11-30 18:13 ` [PATCH rcu 12/16] percpu-refcount: Use call_rcu_hurry() for atomic switch Paul E. McKenney
2022-11-30 18:19   ` Joel Fernandes
2022-11-30 19:43   ` Tejun Heo
2022-11-30 21:44     ` Paul E. McKenney
2022-11-30 18:13 ` [PATCH rcu 13/16] workqueue: Make queue_rcu_work() use call_rcu_hurry() Paul E. McKenney
2022-11-30 18:18   ` Joel Fernandes
2022-11-30 19:43   ` Tejun Heo
2022-11-30 18:13 ` [PATCH rcu 14/16] rxrpc: Use call_rcu_hurry() instead of call_rcu() Paul E. McKenney
2022-11-30 18:16   ` Joel Fernandes
2022-11-30 18:37     ` Eric Dumazet
2022-11-30 21:45       ` Paul E. McKenney
2022-11-30 21:49         ` Steven Rostedt
2022-11-30 22:00           ` Paul E. McKenney
2022-11-30 19:09     ` David Howells
2022-11-30 19:20       ` Joel Fernandes
2022-11-30 21:43         ` Paul E. McKenney
2022-11-30 22:06           ` Joel Fernandes
2022-11-30 20:12       ` Paul E. McKenney
2022-11-30 22:47       ` Joel Fernandes
2022-11-30 23:05         ` David Howells
2022-11-30 23:15           ` Joel Fernandes
2023-03-11 17:46           ` Joel Fernandes
2022-11-30 18:13 ` [PATCH rcu 15/16] net: Use call_rcu_hurry() for dst_release() Paul E. McKenney
2022-11-30 18:16   ` Joel Fernandes
2022-11-30 18:39     ` Eric Dumazet
2022-11-30 18:50       ` Joel Fernandes
2022-11-30 21:40       ` Paul E. McKenney
2022-11-30 18:13 ` [PATCH rcu 16/16] net: devinet: Reduce refcount before grace period Paul E. McKenney

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