diff -r 23348e42fb34 -r af8578e25d17 src/hotspot/share/runtime/safepoint.cpp
--- a/src/hotspot/share/runtime/safepoint.cpp	Mon Feb 26 10:20:06 2018 -0500
+++ b/src/hotspot/share/runtime/safepoint.cpp	Mon Feb 26 11:28:05 2018 -0500
@@ -78,6 +78,8 @@
 volatile int SafepointSynchronize::_safepoint_counter = 0;
 int SafepointSynchronize::_current_jni_active_count = 0;
 long  SafepointSynchronize::_end_of_last_safepoint = 0;
+int SafepointSynchronize::_defer_thr_suspend_loop_count = 4000;
+static const int safepoint_spin_before_yield = 2000;
 static volatile int PageArmed = 0 ;        // safepoint polling page is RO|RW vs PROT_NONE
 static volatile int TryingToBlock = 0 ;    // proximate value -- for advisory use only
 static bool timeout_error_printed = false;
@@ -191,12 +193,10 @@
       // Make interpreter safepoint aware
       Interpreter::notice_safepoints();
 
-      if (DeferPollingPageLoopCount < 0) {
-        // Make polling safepoint aware
-        guarantee (PageArmed == 0, "invariant") ;
-        PageArmed = 1 ;
-        os::make_polling_page_unreadable();
-      }
+      // Make polling safepoint aware
+      guarantee (PageArmed == 0, "invariant") ;
+      PageArmed = 1 ;
+      os::make_polling_page_unreadable();
     }
 
     // Consider using active_processor_count() ... but that call is expensive.
@@ -309,19 +309,21 @@
           // 9. On windows consider using the return value from SwitchThreadTo()
           //    to drive subsequent spin/SwitchThreadTo()/Sleep(N) decisions.
 
-          if (SafepointMechanism::uses_global_page_poll() && int(iterations) == DeferPollingPageLoopCount) {
-            guarantee (PageArmed == 0, "invariant") ;
-            PageArmed = 1 ;
-            os::make_polling_page_unreadable();
+          if (int(iterations) == -1) { // overflow - something is wrong.
+            // We can only overflow here when we are using global
+            // polling pages. We keep this guarantee in its original
+            // form so that searches of the bug database for this
+            // failure mode find the right bugs.
+            guarantee (PageArmed == 0, "invariant");
           }
 
           // Instead of (ncpus > 1) consider either (still_running < (ncpus + EPSILON)) or
           // ((still_running + _waiting_to_block - TryingToBlock)) < ncpus)
           ++steps ;
-          if (ncpus > 1 && steps < SafepointSpinBeforeYield) {
+          if (ncpus > 1 && steps < safepoint_spin_before_yield) {
             SpinPause() ;     // MP-Polite spin
           } else
-            if (steps < DeferThrSuspendLoopCount) {
+            if (steps < _defer_thr_suspend_loop_count) {
               os::naked_yield() ;
             } else {
               os::naked_short_sleep(1);
@@ -1190,7 +1192,6 @@
 float  SafepointSynchronize::_ts_of_current_safepoint = 0.0f;
 
 static jlong  cleanup_end_time = 0;
-static bool   need_to_track_page_armed_status = false;
 static bool   init_done = false;
 
 // Helper method to print the header.
@@ -1202,11 +1203,6 @@
              "[ threads:    total initially_running wait_to_block ]"
              "[ time:    spin   block    sync cleanup    vmop ] ");
 
-  // no page armed status printed out if it is always armed.
-  if (need_to_track_page_armed_status) {
-    tty->print("page_armed ");
-  }
-
   tty->print_cr("page_trap_count");
 }
 
@@ -1229,9 +1225,6 @@
   guarantee(_safepoint_stats != NULL,
             "not enough memory for safepoint instrumentation data");
 
-  if (DeferPollingPageLoopCount >= 0) {
-    need_to_track_page_armed_status = true;
-  }
   init_done = true;
 }
 
@@ -1271,10 +1264,6 @@
     spstat->_time_to_spin = cur_time - spstat->_time_to_spin;
   }
 
-  if (need_to_track_page_armed_status) {
-    spstat->_page_armed = (PageArmed == 1);
-  }
-
   // Records the start time of waiting for to block. Updated when block is done.
   if (_waiting_to_block != 0) {
     spstat->_time_to_wait_to_block = cur_time;
@@ -1363,9 +1352,6 @@
                (int64_t)(sstats->_time_to_do_cleanups / MICROUNITS),
                (int64_t)(sstats->_time_to_exec_vmop / MICROUNITS));
 
-    if (need_to_track_page_armed_status) {
-      tty->print(INT32_FORMAT_W(10) " ", sstats->_page_armed);
-    }
     tty->print_cr(INT32_FORMAT_W(15) " ", sstats->_nof_threads_hit_page_trap);
   }
 }
@@ -1392,12 +1378,7 @@
   tty->cr();
 
   // Print out polling page sampling status.
-  if (!need_to_track_page_armed_status) {
-    tty->print_cr("Polling page always armed");
-  } else {
-    tty->print_cr("Defer polling page loop count = " INTX_FORMAT "\n",
-                  DeferPollingPageLoopCount);
-  }
+  tty->print_cr("Polling page always armed");
 
   for (int index = 0; index < VM_Operation::VMOp_Terminating; index++) {
     if (_safepoint_reasons[index] != 0) {