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src/share/vm/runtime/virtualspace.cpp
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rev 8067 : [mq]: 8077255-tracepagesizes-reports-wrong-page-size-on-windows-with-g1
*** 35,50 ****
// Dummy constructor
ReservedSpace::ReservedSpace() : _base(NULL), _size(0), _noaccess_prefix(0),
_alignment(0), _special(false), _executable(false) {
}
! ReservedSpace::ReservedSpace(size_t size, bool prefer_large_pages) {
// Want to use large pages where possible and pad with small pages.
! size_t page_size = os::page_size_for_region_unaligned(size, 1);
bool large_pages = page_size != (size_t)os::vm_page_size();
size_t alignment;
! if (large_pages && prefer_large_pages) {
alignment = MAX2(page_size, (size_t)os::vm_allocation_granularity());
// ReservedSpace initialization requires size to be aligned to the given
// alignment. Align the size up.
size = align_size_up(size, alignment);
} else {
--- 35,51 ----
// Dummy constructor
ReservedSpace::ReservedSpace() : _base(NULL), _size(0), _noaccess_prefix(0),
_alignment(0), _special(false), _executable(false) {
}
! ReservedSpace::ReservedSpace(size_t size, size_t preferred_page_size) {
! bool has_preferred_page_size = preferred_page_size != 0;
// Want to use large pages where possible and pad with small pages.
! size_t page_size = has_preferred_page_size ? preferred_page_size : os::page_size_for_region_unaligned(size, 1);
bool large_pages = page_size != (size_t)os::vm_page_size();
size_t alignment;
! if (large_pages && has_preferred_page_size) {
alignment = MAX2(page_size, (size_t)os::vm_allocation_granularity());
// ReservedSpace initialization requires size to be aligned to the given
// alignment. Align the size up.
size = align_size_up(size, alignment);
} else {
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