src/share/vm/memory/genCollectedHeap.cpp

*** 83,92 ****
--- 83,100 ----
    _gen_policy(policy),
    _process_strong_tasks(new SubTasksDone(GCH_PS_NumElements)),
    _full_collections_completed(0)
  {
    assert(policy != NULL, "Sanity check");
+   if (UseConcMarkSweepGC) {
+     _workers = new FlexibleWorkGang("GC Thread", ParallelGCThreads,
+                             /* are_GC_task_threads */true,
+                             /* are_ConcurrentGC_threads */false);
+     _workers->initialize_workers();
+   } else {
+     _workers = NULL;
+   }
  }
  
  jint GenCollectedHeap::initialize() {
    CollectedHeap::pre_initialize();