From: Paul E. McKenney <paulmck@kernel.org>
Date: Wed, 22 Mar 2023 00:33:07 +0000 (-0700)
Subject: doc: Document the rcutree.rcu_resched_ns module parameter
X-Git-Tag: v6.6.17~4601^2~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=fb6112497bfe6defef46e58da0d5f291c11bd819;p=platform%2Fkernel%2Flinux-rpi.git

doc: Document the rcutree.rcu_resched_ns module parameter

This commit adds kernel-parameters.txt documentation for the
rcutree.rcu_resched_ns module parameter.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 8a094e2..c21245c 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -4861,6 +4861,13 @@
 			This wake_up() will be accompanied by a
 			WARN_ONCE() splat and an ftrace_dump().
 
+	rcutree.rcu_resched_ns= [KNL]
+			Limit the time spend invoking a batch of RCU
+			callbacks to the specified number of nanoseconds.
+			By default, this limit is checked only once
+			every 32 callbacks in order to limit the pain
+			inflicted by local_clock() overhead.
+
 	rcutree.rcu_unlock_delay= [KNL]
 			In CONFIG_RCU_STRICT_GRACE_PERIOD=y kernels,
 			this specifies an rcu_read_unlock()-time delay