2023-05-10 16:54:58

by Paul E. McKenney

[permalink] [raw]
Subject: [PATCH rcu 2/3] 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 <[email protected]>
---
Documentation/admin-guide/kernel-parameters.txt | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 8a094e2fc381..c21245c0cce6 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
--
2.40.1