sc0 := scavChunkData{
		gen:            gen,
		inUse:          inUse,
		lastInUse:      lastInUse,
		scavChunkFlags: scavChunkFlags(flags),
	}
	scp := sc0.pack()
	sc1 := unpackScavChunkData(scp)
	return sc0 == sc1
}

const GTrackingPeriod = gTrackingPeriod

var ZeroBase = unsafe.Pointer(&zerobase)

const UserArenaChunkBytes = userArenaChunkBytes

type UserArena struct {