src/share/vm/runtime/virtualspace.cpp

rev 7514 : 8066875: VirtualSpace does not use large pages

*** 355,365 ****
    _executable             = false;
  }
  
  
  bool VirtualSpace::initialize(ReservedSpace rs, size_t committed_size) {
!   const size_t max_commit_granularity = os::page_size_for_region(rs.size(), 1);
    return initialize_with_granularity(rs, committed_size, max_commit_granularity);
  }
  
  bool VirtualSpace::initialize_with_granularity(ReservedSpace rs, size_t committed_size, size_t max_commit_granularity) {
    if(!rs.is_reserved()) return false;  // allocation failed.
--- 355,365 ----
    _executable             = false;
  }
  
  
  bool VirtualSpace::initialize(ReservedSpace rs, size_t committed_size) {
!   const size_t max_commit_granularity = os::largest_page_size_less_than(rs.size());
    return initialize_with_granularity(rs, committed_size, max_commit_granularity);
  }
  
  bool VirtualSpace::initialize_with_granularity(ReservedSpace rs, size_t committed_size, size_t max_commit_granularity) {
    if(!rs.is_reserved()) return false;  // allocation failed.
*** 990,1000 ****
      case Reserve:
        return vs.initialize(rs, 0);
      case Disable:
        return vs.initialize_with_granularity(rs, 0, os::vm_page_size());
      case Commit:
!       return vs.initialize_with_granularity(rs, 0, os::page_size_for_region(rs.size(), 1));
      }
    }
  
   public:
    static void test_virtual_space_actual_committed_space(size_t reserve_size, size_t commit_size,
--- 990,1000 ----
      case Reserve:
        return vs.initialize(rs, 0);
      case Disable:
        return vs.initialize_with_granularity(rs, 0, os::vm_page_size());
      case Commit:
!       return vs.initialize_with_granularity(rs, 0, os::largest_page_size_less_than(rs.size()));
      }
    }
  
   public:
    static void test_virtual_space_actual_committed_space(size_t reserve_size, size_t commit_size,