src/share/vm/memory/cardTableModRefBS.cpp

rev 7318 : 8064721: The card tables only ever need two covering regions

*** 51,63 ****
    assert(_page_size != 0, "uninitialized, check declaration order");
    const size_t granularity = os::vm_allocation_granularity();
    return align_size_up(_guard_index + 1, MAX2(_page_size, granularity));
  }
  
! CardTableModRefBS::CardTableModRefBS(MemRegion whole_heap,
!                                      int max_covered_regions):
!   ModRefBarrierSet(max_covered_regions),
    _whole_heap(whole_heap),
    _guard_index(0),
    _guard_region(),
    _last_valid_index(0),
    _page_size(os::vm_page_size()),
--- 51,62 ----
    assert(_page_size != 0, "uninitialized, check declaration order");
    const size_t granularity = os::vm_allocation_granularity();
    return align_size_up(_guard_index + 1, MAX2(_page_size, granularity));
  }
  
! CardTableModRefBS::CardTableModRefBS(MemRegion whole_heap) :
!   ModRefBarrierSet(),
    _whole_heap(whole_heap),
    _guard_index(0),
    _guard_region(),
    _last_valid_index(0),
    _page_size(os::vm_page_size()),