--- old/src/share/vm/memory/genCollectedHeap.cpp	2015-02-11 22:34:21.537474400 +0900
+++ new/src/share/vm/memory/genCollectedHeap.cpp	2015-02-11 22:34:21.376474400 +0900
@@ -322,9 +322,16 @@
 }
 
 bool GenCollectedHeap::should_do_concurrent_full_gc(GCCause::Cause cause) {
-  return UseConcMarkSweepGC &&
-         ((cause == GCCause::_gc_locker && GCLockerInvokesConcurrent) ||
-          (cause == GCCause::_java_lang_system_gc && ExplicitGCInvokesConcurrent));
+  if (!UseConcMarkSweepGC) {
+    return false;
+  }
+
+  switch (cause) {
+    case GCCause::_gc_locker:           return GCLockerInvokesConcurrent;
+    case GCCause::_java_lang_system_gc:
+    case GCCause::_dcmd_gc_run:         return ExplicitGCInvokesConcurrent;
+    default:                            return false;
+  }
 }
 
 void GenCollectedHeap::do_collection(bool  full,