// expired even if other pods are deleted.
		rsc.expectations.ExpectDeletions(logger, rsKey, getPodKeys(podsToDelete))

		errCh := make(chan error, diff)
		var wg sync.WaitGroup
		wg.Add(diff)
		for _, pod := range podsToDelete {
			go func(targetPod *v1.Pod) {
				defer wg.Done()
				if err := rsc.podControl.DeletePod(ctx, rs.Namespace, targetPod.Name, rs); err != nil {

	}

	// Now we need to delete MaxUnavailable- unavailablePods
	// start deleting one by one starting from the highest ordinal first
	podsToDelete := maxUnavailable - unavailablePods

	deletedPods := 0
	for target := len(replicas) - 1; target >= updateMin && deletedPods < podsToDelete; target-- {

		// delete the Pod if it is healthy and the revision doesnt match the target