--- a/src/hotspot/share/runtime/globals.hpp	Mon Nov 13 14:53:28 2017 -0500
+++ b/src/hotspot/share/runtime/globals.hpp	Tue Nov 14 10:09:21 2017 +0100
@@ -2020,8 +2020,8 @@
   product(bool, ZeroTLAB, false,                                            \
           "Zero out the newly created TLAB")                                \
                                                                             \
-  product(bool, FastTLABRefill, true,                                       \
-          "Use fast TLAB refill code")                                      \
+  product(bool, FastTLABRefill, false,                                      \
+          "(Deprecated) Use fast TLAB refill code")                         \
                                                                             \
   product(bool, TLABStats, true,                                            \
           "Provide more detailed and expensive TLAB statistics.")           \