- `GetPodQOS(pod *core.Pod)` function now returns the stored value from `PodStatus.QOSClass`, if set. To compute/evaluate the value of `QOSClass` from scratch, `ComputePodQOS(pod*core.Pod)` must be used. ([#119665](https://github.com/kubernetes/kubernetes/pull/119665), [@vinaykul](https://github.com/vinaykul))

	out.InitContainerStatuses = *(*[]core.ContainerStatus)(unsafe.Pointer(&in.InitContainerStatuses))
	out.ContainerStatuses = *(*[]core.ContainerStatus)(unsafe.Pointer(&in.ContainerStatuses))
	out.QOSClass = core.PodQOSClass(in.QOSClass)
	out.EphemeralContainerStatuses = *(*[]core.ContainerStatus)(unsafe.Pointer(&in.EphemeralContainerStatuses))
	out.Resize = core.PodResizeStatus(in.Resize)

	// See PodQOSClass type for available QOS classes
	// More info: https://kubernetes.io/docs/concepts/workloads/pods/pod-qos/#quality-of-service-classes
	// +optional
	QOSClass PodQOSClass `json:"qosClass,omitempty" protobuf:"bytes,9,rep,name=qosClass"`
	// Status for any ephemeral containers that have run in this pod.
	// +optional
	// +listType=atomic

  // See PodQOSClass type for available QOS classes
  // More info: https://kubernetes.io/docs/concepts/workloads/pods/pod-qos/#quality-of-service-classes
  // +optional
  optional string qosClass = 9;

  // Status for any ephemeral containers that have run in this pod.
  // +optional
  repeated ContainerStatus ephemeralContainerStatuses = 13;

	// Date and time at which the object was acknowledged by the Kubelet.
	// This is before the Kubelet pulled the container image(s) for the pod.
	// +optional
	StartTime *metav1.Time
	// +optional
	QOSClass PodQOSClass

	// The list has one entry per init container in the manifest. The most recent successful
	// init container will have ready = true, the most recently started container will have
	// startTime set.

	"containerStatuses":          "The list has one entry per container in the manifest. More info: https://kubernetes.io/docs/concepts/workloads/pods/pod-lifecycle#pod-and-container-status",

	if apiequality.Semantic.DeepEqual(newPod.Spec, oldPod.Spec) {
		return allErrs
	}

	if qos.GetPodQOS(oldPod) != qos.ComputePodQOS(newPod) {
		allErrs = append(allErrs, field.Invalid(fldPath, newPod.Status.QOSClass, "Pod QoS is immutable"))
	}

	// handle updateable fields by munging those fields prior to deep equal comparison.
	mungedPodSpec := *newPod.Spec.DeepCopy()
	// munge spec.containers[*].image

  // See PodQOSClass type for available QOS classes
  // More info: https://kubernetes.io/docs/concepts/workloads/pods/pod-qos/#quality-of-service-classes
  // +optional
  optional string qosClass = 9;

  // Status for any ephemeral containers that have run in this pod.
  // +optional
  // +listType=atomic
  repeated ContainerStatus ephemeralContainerStatuses = 13;