}{
		{
			name:        "nodes failed Prefilter plugin",
			numAllNodes: 3,
			diagnosis: Diagnosis{
				PreFilterMsg: "Node(s) failed PreFilter plugin FalsePreFilter",
				NodeToStatusMap: NodeToStatusMap{
					// They're inserted by the framework.
					// We don't include them in the reason message because they'd be just duplicates.

	nodeNames := []string{"node1", "node2", "node3", "node4"}
	tests := []struct {
		name          string
		nodesStatuses framework.NodeToStatusMap
		expected      sets.Set[string] // set of expected node names.
	}{
		{
			name: "No node should be attempted",
			nodesStatuses: framework.NodeToStatusMap{
				"node1": framework.NewStatus(framework.UnschedulableAndUnresolvable, nodeaffinity.ErrReasonPod),

	scheduler.ScheduleOne(ctx)
	select {
	case err := <-errChan:
		expectErr := &framework.FitError{
			Pod:         secondPod,
			NumAllNodes: 1,
			Diagnosis: framework.Diagnosis{
				NodeToStatusMap: framework.NodeToStatusMap{
					node.Name: framework.NewStatus(framework.Unschedulable, nodeports.ErrReason).WithPlugin(nodeports.Name),
				},
				UnschedulablePlugins: sets.New(nodeports.Name),
			},
		}

		}

		if sts.IsRejected() {
			fitErr := &framework.FitError{
				NumAllNodes: 1,
				Pod:         pod,
				Diagnosis: framework.Diagnosis{
					NodeToStatusMap: framework.NodeToStatusMap{scheduleResult.SuggestedHost: sts},
				},
			}
			fitErr.Diagnosis.AddPluginStatus(sts)

// that may be satisfied by removing pods from the node.
func nodesWherePreemptionMightHelp(nodes []*framework.NodeInfo, m framework.NodeToStatusMap) ([]*framework.NodeInfo, framework.NodeToStatusMap) {
	var potentialNodes []*framework.NodeInfo
	nodeStatuses := make(framework.NodeToStatusMap)
	unresolvableStatus := framework.NewStatus(framework.UnschedulableAndUnresolvable, "Preemption is not helpful for scheduling")

	// NodeToStatusMap has statuses that each Node got in the Filter phase.
	// If this scheduling cycle failed at PreFilter, all Nodes have the status from the rejector PreFilter plugin in NodeToStatusMap.
	// Note that the scheduling framework runs PostFilter plugins even when PreFilter returned UnschedulableAndUnresolvable.
	// In that case, NodeToStatusMap contains all Nodes with UnschedulableAndUnresolvable.

			// so that these nodes are eligible for preemption, we set their status
			// to Unschedulable.
			nodeToStatusMap := make(framework.NodeToStatusMap, len(nodes))
			for _, n := range nodes {
				nodeToStatusMap[n.Name] = framework.NewStatus(framework.Unschedulable)
			}

			res, status := pe.Preempt(ctx, test.pod, nodeToStatusMap)
			if !status.IsSuccess() && !status.IsRejected() {

		// the scheduling framework inserts the same unschedulable status to all nodes in NodeToStatusMap.
		// So, we shouldn't add the message from NodeToStatusMap when the PreFilter failed.
		// Otherwise, we will have duplicated reasons in the error message.
		reasons := make(map[string]int)
		for _, status := range f.Diagnosis.NodeToStatusMap {
			for _, reason := range status.Reasons() {
				reasons[reason]++
			}
		}

	}
	return &pl, nil
}

// PostFilter invoked at the postFilter extension point.
func (pl *DefaultPreemption) PostFilter(ctx context.Context, state *framework.CycleState, pod *v1.Pod, m framework.NodeToStatusMap) (*framework.PostFilterResult, *framework.Status) {
	defer func() {
		metrics.PreemptionAttempts.Inc()
	}()

	pe := preemption.Evaluator{
		PluginName: names.DefaultPreemption,
		Handler:    pl.fh,

func (f *frameworkImpl) RunPostFilterPlugins(ctx context.Context, state *framework.CycleState, pod *v1.Pod, filteredNodeStatusMap framework.NodeToStatusMap) (_ *framework.PostFilterResult, status *framework.Status) {
	startTime := time.Now()
	defer func() {