Add CHANGES note for [GL #4163]

diff --git a/CHANGES b/CHANGES
index f9262eac38b02b50b587f03826f3e808b7d39b40..5f7013ae235f952a71c8b9de2b342982f870a7d2 100644 (file)
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+6201.  [bug]           The free_all_cpu_call_rcu_data() call at the end
+                       of isc_loopmgr_run() was causing ~200 ms extra
+                       latency. [GL #4163]
+
 6200.  [placeholder]
 
 6199.  [bug]           Improve HTTP Connection: header protocol conformance