diff -r 490ace57944d -r d792e42aeb4f hotspot/src/cpu/x86/vm/globals_x86.hpp
--- a/hotspot/src/cpu/x86/vm/globals_x86.hpp	Wed Apr 09 09:17:43 2014 +0200
+++ b/hotspot/src/cpu/x86/vm/globals_x86.hpp	Wed Apr 09 11:18:02 2014 -0700
@@ -162,7 +162,7 @@
           "Number of milliseconds to wait before start calculating aborts " \
           "for RTM locking")                                                \
                                                                             \
-  experimental(bool, UseRTMXendForLockBusy, false,                          \
+  experimental(bool, UseRTMXendForLockBusy, true,                           \
           "Use RTM Xend instead of Xabort when lock busy")                  \
                                                                             \
   /* assembler */                                                           \