linux-kernel - [PATCH v2 2/2] Documentation/kernel-parameters: Update rcu_normal_wake_from

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Message-Id: <20250611175658.91361-2-urezki@gmail.com>
Date: Wed, 11 Jun 2025 19:56:58 +0200
From: "Uladzislau Rezki (Sony)" <urezki@...il.com>
To: "Paul E . McKenney" <paulmck@...nel.org>,
	Neeraj upadhyay <Neeraj.Upadhyay@....com>
Cc: Joel Fernandes <joel@...lfernandes.org>,
	RCU <rcu@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <frederic@...nel.org>,
	Uladzislau Rezki <urezki@...il.com>
Subject: [PATCH v2 2/2] Documentation/kernel-parameters: Update rcu_normal_wake_from_gp doc

Update the documentation about rcu_normal_wake_from_gp parameter.

Signed-off-by: Uladzislau Rezki (Sony) <urezki@...il.com>
---
 Documentation/admin-guide/kernel-parameters.txt | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index f1f2c0874da9..f7e4bee2b823 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -5485,7 +5485,8 @@
 			echo 1 > /sys/module/rcutree/parameters/rcu_normal_wake_from_gp
 			or pass a boot parameter "rcutree.rcu_normal_wake_from_gp=1"
 
-			Default is 0.
+			Default is 1 if num_possible_cpus() <= 16 and it is not explicitly
+			disabled by the boot parameter passing 0.
 
 	rcuscale.gp_async= [KNL]
 			Measure performance of asynchronous
-- 
2.39.5