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diff --git a/doc/guides/rel_notes/release_18_11.rst b/doc/guides/rel_notes/release_18_11.rst
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@@ -190,6 +190,12 @@ New Features
collisions. In addition, the internal hashing algorithm was changed to use
partial-key hashing to improve memory efficiency and lookup performance.
+* **Added lock free reader/writer concurrency to hash library (rte_hash).**
+
+ Lock free reader/writer concurrency prevents the readers from getting
+ blocked due to a pre-empted writer thread. This allows the hash library
+ to be used in scenarios where the writer thread runs on control plane.
+
* **Added Traffic Pattern Aware Power Control Library**
Added an experimental library. This extend Power Library and provide