src/share/vm/gc_implementation/g1/g1RootProcessor.cpp

*** 251,261 ****
      }
    }
  
    {
      G1GCParPhaseTimesTracker x(phase_times, G1GCPhaseTimes::ThreadRoots, worker_i);
!     Threads::possibly_parallel_oops_do(strong_roots, thread_stack_clds, strong_code);
    }
  }
  
  void G1RootProcessor::process_vm_roots(OopClosure* strong_roots,
                                         OopClosure* weak_roots,
--- 251,262 ----
      }
    }
  
    {
      G1GCParPhaseTimesTracker x(phase_times, G1GCPhaseTimes::ThreadRoots, worker_i);
!     bool is_par = _g1h->n_par_threads() > 0;
!     Threads::possibly_parallel_oops_do(is_par, strong_roots, thread_stack_clds, strong_code);
    }
  }
  
  void G1RootProcessor::process_vm_roots(OopClosure* strong_roots,
                                         OopClosure* weak_roots,