src/share/vm/gc_implementation/parallelScavenge/generationSizer.cpp

rev 7181 : 8049864: TestParallelHeapSizeFlags fails with unexpected heap size
Reviewed-by: sjohanss, jmasa

*** 64,76 ****
    }
  }
  
  void GenerationSizer::initialize_size_info() {
    trace_gen_sizes("ps heap raw");
!   const size_t page_sz = os::page_size_for_region(_min_heap_byte_size,
!                                                   _max_heap_byte_size,
!                                                   8);
  
    // Can a page size be something else than a power of two?
    assert(is_power_of_2((intptr_t)page_sz), "must be a power of 2");
    size_t new_alignment = round_to(page_sz, _gen_alignment);
    if (new_alignment != _gen_alignment) {
--- 64,77 ----
    }
  }
  
  void GenerationSizer::initialize_size_info() {
    trace_gen_sizes("ps heap raw");
!   const size_t max_page_sz = os::page_size_for_region(_max_heap_byte_size, 8);
!   const size_t min_pages = 4; // 1 for eden + 1 for each survivor + 1 for old
!   const size_t min_page_sz = os::page_size_for_region(_min_heap_byte_size, min_pages);
!   const size_t page_sz = MIN2(max_page_sz, min_page_sz);
  
    // Can a page size be something else than a power of two?
    assert(is_power_of_2((intptr_t)page_sz), "must be a power of 2");
    size_t new_alignment = round_to(page_sz, _gen_alignment);
    if (new_alignment != _gen_alignment) {