total := uint64(0)
	for _, z := range p {
		total += z.Available
	}
	return total
}

// FilterMaxUsed will filter out any pools that has used percent bigger than max,
// unless all have that, in which case all are preserved.
func (p serverPoolsAvailableSpace) FilterMaxUsed(max int) {
	// We aren't modifying p, only entries in it, so we don't need to receive a pointer.
	if len(p) <= 1 {
		// Nothing to do.