if ((size_t)region & (region_size - 1)) {
TRACE("m0", "get_new_region: region not aligned", 0, 0);
munmap(region, region_size);
if ((size_t)region & (region_size - 1)) {
TRACE("m0", "get_new_region: region not aligned", 0, 0);
munmap(region, region_size);