Add CHANGES note for GL #2433

diff --git a/CHANGES b/CHANGES
index 59e62a15d64d136533c427af396182bf45ff66cd..60ba9d53119f494e08ebb2be595da43c22352ffc 100644 (file)
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,11 @@
+5585.  [func]          Implementations of memory contexts and memory pools were
+                       refactored to reduce lock contention for shared memory
+                       contexts by replacing mutexes with atomic operations.
+                       The internal memory allocator was simplified so that it
+                       is only a thin wrapper around the system allocator.
+                       Since this change makes the "-M external" named option
+                       redundant, the latter was removed. [GL #2433]
+
 5584.  [bug]           Rollback setting IP_DONTFRAG option on the UDP sockets.
                        [GL #2487]