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

*** 625,635 ****
  
    assert(gch->no_allocs_since_save_marks(0),
           "save marks have not been newly set.");
  
    {
!     // SerialGC runs with n_threads == 0.
      StrongRootsScope srs(0);
  
      gch->gen_process_roots(&srs,
                             _level,
                             true,  // Process younger gens, if any,
--- 625,637 ----
  
    assert(gch->no_allocs_since_save_marks(0),
           "save marks have not been newly set.");
  
    {
!     // DefNew needs to run with n_threads == 0, to make sure the serial
!     // version of the card table scanning code is used.
!     // See: CardTableModRefBS::non_clean_card_iterate_possibly_parallel.
      StrongRootsScope srs(0);
  
      gch->gen_process_roots(&srs,
                             _level,
                             true,  // Process younger gens, if any,