diff -r 28b50d07f6f8 -r 710a3c8b516e src/share/vm/oops/klass.hpp
--- a/src/share/vm/oops/klass.hpp	Mon Sep 08 12:35:01 2014 -0700
+++ b/src/share/vm/oops/klass.hpp	Tue Aug 08 15:57:29 2017 +0800
@@ -275,8 +275,18 @@
   // The Klasses are not placed in the Heap, so the Card Table or
   // the Mod Union Table can't be used to mark when klasses have modified oops.
   // The CT and MUT bits saves this information for the individual Klasses.
-  void record_modified_oops()            { _modified_oops = 1; }
-  void clear_modified_oops()             { _modified_oops = 0; }
+  void record_modified_oops()            { 
+    _modified_oops = 1; 
+#ifdef MIPS64
+    if (Use3A2000) OrderAccess::fence();    
+#endif 
+  }
+  void clear_modified_oops()             { 
+    _modified_oops = 0; 
+#ifdef MIPS64
+    if (Use3A2000) OrderAccess::fence();    
+#endif 
+  }
   bool has_modified_oops()               { return _modified_oops == 1; }
 
   void accumulate_modified_oops()        { if (has_modified_oops()) _accumulated_modified_oops = 1; }