// +-------+-------+-------+
  // The number of domains is less than 5(MinDomains), so "global minimum" is treated as 0.
  // In this situation, new pod with the same labelSelector cannot be scheduled,
  // because computed skew will be 3(3 - 0) if new Pod is scheduled to any of the three zones,
  // it will violate MaxSkew.
  //