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Subject[PATCH v3 3/7] doc: Add rcutree.rcu_normal_wake_from_gp to kernel-parameters.txt
Date
This commit adds rcutree.rcu_normal_wake_from_gp description
to the kernel-parameters.txt file.

Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
---
Documentation/admin-guide/kernel-parameters.txt | 14 ++++++++++++++
1 file changed, 14 insertions(+)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 0a1731a0f0ef..65bfbfb09522 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -4944,6 +4944,20 @@
this kernel boot parameter, forcibly setting it
to zero.

+ rcutree.rcu_normal_wake_from_gp= [KNL]
+ Reduces a latency of synchronize_rcu() call. This approach
+ maintains its own track of synchronize_rcu() callers, so it
+ does not interact with regular callbacks because it does not
+ use a call_rcu[_hurry]() path. Please note, this is for a
+ normal grace period.
+
+ How to enable it:
+
+ 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.
+
rcuscale.gp_async= [KNL]
Measure performance of asynchronous
grace-period primitives such as call_rcu().
--
2.39.2
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