func sysHugePage(v unsafe.Pointer, n uintptr) {
	sysHugePageOS(v, n)
}

// sysNoHugePage does not transition memory regions, but instead provides a
// hint to the OS that it would be less efficient to back this memory region
// with pages of a larger size transparently.
func sysNoHugePage(v unsafe.Pointer, n uintptr) {
	sysNoHugePageOS(v, n)
}

				// Make the chunk mapping eligible or ineligible
				// for huge pages, depending on what our current
				// state is.
				if p.chunkHugePages {
					sysHugePage(r, l2Size)
				} else {
					sysNoHugePage(r, l2Size)
				}
			}
			// Store the new chunk block but avoid a write barrier.
			// grow is used in call chains that disallow write barriers.
			*(*uintptr)(unsafe.Pointer(&p.chunks[c.l1()])) = uintptr(r)
		}

			if l2 == nil {
				throw("out of memory allocating heap arena map")
			}
			if h.arenasHugePages {
				sysHugePage(unsafe.Pointer(l2), unsafe.Sizeof(*l2))
			} else {
				sysNoHugePage(unsafe.Pointer(l2), unsafe.Sizeof(*l2))
			}
			atomic.StorepNoWB(unsafe.Pointer(&h.arenas[ri.l1()]), unsafe.Pointer(l2))
		}

		if l2[ri.l2()] != nil {
			throw("arena already initialized")
		}