Add CHANGES note for [GL #1609]

diff --git a/CHANGES b/CHANGES
index 081f6572b6c9cd0d5b37604e1f5f16c6e5ba461a..b673261f5528fc288193bf753847f66cf562f0f7 100644 (file)
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+6099.  [performance]   Change the internal read-write lock to modified C-RW-WP
+                       algorithm that is more reader-writer fair and has better
+                       performance for our workloads. [GL #1609]
+
 6098.  [test]          Don't test HMAC-MD5 when not supported by libcrypto.
                        [GL #3871]