--- old/src/hotspot/share/runtime/objectMonitor.cpp	2018-09-17 23:29:32.519745609 -0700
+++ new/src/hotspot/share/runtime/objectMonitor.cpp	2018-09-17 23:29:32.267745617 -0700
@@ -103,7 +103,6 @@
 
 int ObjectMonitor::Knob_SpinLimit    = 5000;    // derived by an external tool -
 
-static int Knob_SuccEnabled         = 1;       // futile wake throttling
 static int Knob_SuccRestrict        = 0;       // Limit successors + spinners to at-most-one
 static int Knob_MaxSpinners         = -1;      // Should be a function of # CPUs
 static int Knob_Bonus               = 100;     // spin success bonus
@@ -1242,7 +1241,7 @@
   // 2. ST _owner = NULL
   // 3. unpark(wakee)
 
-  _succ = Knob_SuccEnabled ? Wakee->_thread : NULL;
+  _succ = Wakee->_thread;
   ParkEvent * Trigger = Wakee->_event;
 
   // Hygiene -- once we've set _owner = NULL we can't safely dereference Wakee again.