if beg < end {
			madvise(unsafe.Pointer(beg), end-beg, _MADV_HUGEPAGE)
		}
	}
}

func sysNoHugePageOS(v unsafe.Pointer, n uintptr) {
	if uintptr(v)&(physPageSize-1) != 0 {
		// The Linux implementation requires that the address
		// addr be page-aligned, and allows length to be zero.
		throw("unaligned sysNoHugePageOS")
	}
	madvise(v, n, _MADV_NOHUGEPAGE)
}