originalPod, modifiedPod, err := util.As[*v1.Pod](oldObj, newObj)
	if err != nil {
		return framework.Queue, err
	}

	if (modifiedPod != nil && !involvedInTopologySpreading(modifiedPod, pod)) || (originalPod != nil && !involvedInTopologySpreading(originalPod, pod)) {
		logger.V(5).Info("the added/updated/deleted pod is unscheduled or has different namespace with target pod, so it doesn't make the target pod schedulable",