--- old/src/hotspot/share/runtime/objectMonitor.cpp	2018-09-17 23:29:57.463744740 -0700
+++ new/src/hotspot/share/runtime/objectMonitor.cpp	2018-09-17 23:29:57.211744749 -0700
@@ -107,7 +107,6 @@
 static int Knob_BonusB              = 100;     // spin success bonus
 static int Knob_Penalty             = 200;     // spin failure penalty
 static int Knob_Poverty             = 1000;
-static int Knob_SpinAfterFutile     = 1;       // Spin after returning from park()
 static int Knob_FixedSpin           = 0;
 static int Knob_OState              = 3;       // Spinner checks thread state of _owner
 static int Knob_UsePause            = 1;
@@ -567,7 +566,7 @@
     // We can defer clearing _succ until after the spin completes
     // TrySpin() must tolerate being called with _succ == Self.
     // Try yet another round of adaptive spinning.
-    if ((Knob_SpinAfterFutile & 1) && TrySpin(Self) > 0) break;
+    if (TrySpin(Self) > 0) break;
 
     // We can find that we were unpark()ed and redesignated _succ while
     // we were spinning.  That's harmless.  If we iterate and call park(),
@@ -659,9 +658,7 @@
 // contended slow-path from EnterI().  We use ReenterI() only for
 // monitor reentry in wait().
 //
-// In the future we should reconcile EnterI() and ReenterI(), adding
-// Knob_Reset and Knob_SpinAfterFutile support and restructuring the
-// loop accordingly.
+// In the future we should reconcile EnterI() and ReenterI().
 
 void ObjectMonitor::ReenterI(Thread * Self, ObjectWaiter * SelfNode) {
   assert(Self != NULL, "invariant");