--- old/src/hotspot/share/runtime/objectMonitor.cpp	2018-09-17 23:30:39.255743284 -0700
+++ new/src/hotspot/share/runtime/objectMonitor.cpp	2018-09-17 23:30:39.043743291 -0700
@@ -110,7 +110,6 @@
 static int Knob_FixedSpin           = 0;
 static int Knob_PreSpin             = 10;      // 20-100 likely better
 
-static int Knob_FastHSSEC           = 0;
 static int Knob_MoveNotifyee        = 2;       // notify() - disposition of notifyee
 static int Knob_QMode               = 0;       // EntryList-cxq policy - queue discipline
 static volatile int InitDone        = 0;
@@ -1171,22 +1170,8 @@
 //       ST Self->_suspend_equivalent = false
 //       MEMBAR
 //       LD Self_>_suspend_flags
-//
-// UPDATE 2007-10-6: since I've replaced the native Mutex/Monitor subsystem
-// with a more efficient implementation, the need to use "FastHSSEC" has
-// decreased. - Dave
-
 
 bool ObjectMonitor::ExitSuspendEquivalent(JavaThread * jSelf) {
-  const int Mode = Knob_FastHSSEC;
-  if (Mode && !jSelf->is_external_suspend()) {
-    assert(jSelf->is_suspend_equivalent(), "invariant");
-    jSelf->clear_suspend_equivalent();
-    if (2 == Mode) OrderAccess::storeload();
-    if (!jSelf->is_external_suspend()) return false;
-    // We raced a suspension -- fall thru into the slow path
-    jSelf->set_suspend_equivalent();
-  }
   return jSelf->handle_special_suspend_equivalent_condition();
 }