MEMHEAP_BASE_PAGE_ORDER   38 oshmem/mca/memheap/base/base.h #define MEMHEAP_BASE_PRIVATE_SIZE      (1ULL << MEMHEAP_BASE_PAGE_ORDER) /* should be at least the same as a huge page size */
MEMHEAP_BASE_PAGE_ORDER   39 oshmem/mca/memheap/base/base.h #define MEMHEAP_BASE_MIN_SIZE          (1ULL << MEMHEAP_BASE_PAGE_ORDER)    /* must fit into at least one huge page */