diff --git a/pkg/controller/disruption/disruption.go b/pkg/controller/disruption/disruption.go
index 8b80a9bcc69..5d81fbf28ba 100644
--- a/pkg/controller/disruption/disruption.go
+++ b/pkg/controller/disruption/disruption.go
@@ -462,6 +462,10 @@ func (dc *DisruptionController) trySync(pdb *policy.PodDisruptionBudget) error {
 
 func (dc *DisruptionController) getExpectedPodCount(pdb *policy.PodDisruptionBudget, pods []*api.Pod) (expectedCount, desiredHealthy int32, err error) {
 	err = nil
+	// TODO(davidopp): consider making the way expectedCount and rules about
+	// permitted controller configurations (specifically, considering it an error
+	// if a pod covered by a PDB has 0 controllers or > 1 controller) should be
+	// handled the same way for integer and percentage minAvailable
 	if pdb.Spec.MinAvailable.Type == intstr.Int {
 		desiredHealthy = pdb.Spec.MinAvailable.IntVal
 		expectedCount = int32(len(pods))