src/share/vm/memory/sharedHeap.cpp

@@ -63,11 +63,12 @@
   if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) {
     vm_exit_during_initialization("Failed necessary allocation.");
   }
   _sh = this;  // ch is static, should be set only once.
   if ((UseParNewGC ||
-      (UseConcMarkSweepGC && CMSParallelRemarkEnabled) ||
+      (UseConcMarkSweepGC && (CMSParallelInitialMarkEnabled ||
+                              CMSParallelRemarkEnabled)) ||
        UseG1GC) &&
       ParallelGCThreads > 0) {
     _workers = new FlexibleWorkGang("Parallel GC Threads", ParallelGCThreads,
                             /* are_GC_task_threads */true,
                             /* are_ConcurrentGC_threads */false);