runtime.heapArena.pageInUse (field)

5 uses

	runtime (current package)
		mheap.go#L252: 	pageInUse [pagesPerArena / 8]uint8
		mheap.go#L695: 	pageIdx = ((p / pageSize) / 8) % uintptr(len(arena.pageInUse))
		mheap.go#L828: 		inUse := ha.pageInUse[arenaPage/8:]
		mheap.go#L1314: 		atomic.Or8(&arena.pageInUse[pageIdx], pageMask)
		mheap.go#L1457: 		atomic.And8(&arena.pageInUse[pageIdx], ^pageMask)