src/share/vm/gc/serial/genMarkSweep.cpp

@@ -218,11 +218,11 @@
   }
 
   // This is the point where the entire marking should have completed.
   assert(_marking_stack.is_empty(), "Marking should have completed");
 
-  {
+  if (ClassUnloading) {
     GCTraceTime(Debug, gc, phases) tm_m("Class Unloading", gc_timer());
 
     // Unload classes and purge the SystemDictionary.
     bool purged_class = SystemDictionary::do_unloading(&is_alive);