From: "Joel Fernandes (Google)" <joel@joelfernandes.org>
To: rcu@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, rushikesh.s.kadam@intel.com,
urezki@gmail.com, neeraj.iitr10@gmail.com, frederic@kernel.org,
paulmck@kernel.org, rostedt@goodmis.org, youssefesmat@google.com,
surenb@google.com,
"Joel Fernandes (Google)" <joel@joelfernandes.org>
Subject: [PATCH v8 08/13] rcu/rcuscale: Use call_rcu_flush() for async reader test
Date: Tue, 11 Oct 2022 18:01:37 +0000 [thread overview]
Message-ID: <20221011180142.2742289-9-joel@joelfernandes.org> (raw)
In-Reply-To: <20221011180142.2742289-1-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_flush() API instead to revert to the old behavior.
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.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 bbdcac1804ec..0385e9b12399 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,
--
2.38.0.rc1.362.ged0d419d3c-goog
next prev parent reply other threads:[~2022-10-11 18:02 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-11 18:01 [PATCH v8 00/13] rcu: call_rcu() power improvements Joel Fernandes (Google)
2022-10-11 18:01 ` [PATCH v8 01/13] rcu: Fix missing nocb gp wake on rcu_barrier() Joel Fernandes (Google)
2022-10-14 14:21 ` Paul E. McKenney
2022-10-14 14:40 ` Frederic Weisbecker
2022-10-14 15:03 ` Paul E. McKenney
2022-10-14 15:19 ` Joel Fernandes
2022-10-14 15:46 ` Paul E. McKenney
2022-10-14 20:47 ` Frederic Weisbecker
2022-10-16 15:16 ` Paul E. McKenney
2022-10-16 15:56 ` Joel Fernandes
2022-10-11 18:01 ` [PATCH v8 02/13] rcu: Make call_rcu() lazy to save power Joel Fernandes (Google)
2022-10-11 23:10 ` Frederic Weisbecker
2022-10-12 19:54 ` Joel Fernandes
2022-10-14 15:45 ` Paul E. McKenney
2022-10-11 18:01 ` [PATCH v8 03/13] rcu: Refactor code a bit in rcu_nocb_do_flush_bypass() Joel Fernandes (Google)
2022-10-11 18:01 ` [PATCH v8 04/13] rcu: shrinker for lazy rcu Joel Fernandes (Google)
2022-10-11 18:01 ` [PATCH v8 05/13] rcuscale: Add laziness and kfree tests Joel Fernandes (Google)
2022-10-11 18:01 ` [PATCH v8 06/13] percpu-refcount: Use call_rcu_flush() for atomic switch Joel Fernandes (Google)
2022-10-11 18:01 ` [PATCH v8 07/13] rcu/sync: Use call_rcu_flush() instead of call_rcu Joel Fernandes (Google)
2022-10-11 18:01 ` Joel Fernandes (Google) [this message]
2022-10-11 18:01 ` [PATCH v8 09/13] rcu/rcutorture: Use call_rcu_flush() where needed Joel Fernandes (Google)
2022-10-11 18:01 ` [PATCH v8 10/13] scsi/scsi_error: Use call_rcu_flush() instead of call_rcu() Joel Fernandes (Google)
2022-10-11 18:01 ` [PATCH v8 11/13] workqueue: Make queue_rcu_work() use call_rcu_flush() Joel Fernandes (Google)
2022-10-11 18:01 ` [PATCH v8 12/13] rxrpc: Use call_rcu_flush() instead of call_rcu() Joel Fernandes (Google)
2022-10-11 18:01 ` [PATCH v8 13/13] rcu/debug: Add wake-up debugging for lazy callbacks Joel Fernandes (Google)
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