diff --git a/pkg/apis/autoscaling/v1alpha1/pa_lifecycle.go b/pkg/apis/autoscaling/v1alpha1/pa_lifecycle.go
index 91071fbf23d8..ab39d5558c49 100644
--- a/pkg/apis/autoscaling/v1alpha1/pa_lifecycle.go
+++ b/pkg/apis/autoscaling/v1alpha1/pa_lifecycle.go
@@ -173,6 +173,7 @@ func (pa *PodAutoscaler) ProgressDeadline() (time.Duration, bool) {
 	return pa.annotationDuration(serving.ProgressDeadlineAnnotation)
 }
 
+// RevisionTimeout returns the revision timeout annotation value, or false if not present.
 func (pa *PodAutoscaler) RevisionTimeout() (time.Duration, bool) {
 	return pa.annotationDuration(serving.RevisionTimeoutAnnotation)
 }
@@ -191,6 +192,8 @@ func (pa *PodAutoscaler) IsReady() bool {
 		pas.GetCondition(PodAutoscalerConditionReady).IsTrue()
 }
 
+// CanFailActivationOnUnreachableRevision checks whether the pod autoscaler is Unreachable and has been activating
+// for at least the specified idle period
 func (pa *PodAutoscaler) CanFailActivationOnUnreachableRevision(now time.Time, idlePeriod time.Duration) bool {
 	return pa.Spec.Reachability == ReachabilityUnreachable && pa.Status.CanFailActivation(now, idlePeriod)
 }
diff --git a/pkg/apis/serving/register.go b/pkg/apis/serving/register.go
index 00e2a470f90e..f41a6ec065c5 100644
--- a/pkg/apis/serving/register.go
+++ b/pkg/apis/serving/register.go
@@ -145,6 +145,7 @@ const (
 	// ProgressDeadlineAnnotationKey is the label key for the per revision progress deadline to set for the deployment
 	ProgressDeadlineAnnotationKey = GroupName + "/progress-deadline"
 
+	// RevisionTimeoutAnnotationKey is the label key for the revision timeout to set for the pod autoscaler
 	RevisionTimeoutAnnotationKey = GroupName + "/revision-timeout"
 )
 
diff --git a/pkg/reconciler/autoscaling/kpa/scaler.go b/pkg/reconciler/autoscaling/kpa/scaler.go
index 7e7cac0b3b6f..b9a788a91fcf 100644
--- a/pkg/reconciler/autoscaling/kpa/scaler.go
+++ b/pkg/reconciler/autoscaling/kpa/scaler.go
@@ -328,6 +328,7 @@ func (ks *scaler) applyScale(ctx context.Context, pa *autoscalingv1alpha1.PodAut
 func (ks *scaler) scale(ctx context.Context, pa *autoscalingv1alpha1.PodAutoscaler, sks *netv1alpha1.ServerlessService, desiredScale int32) (int32, error) {
 	asConfig := config.FromContext(ctx).Autoscaler
 	logger := logging.FromContext(ctx)
+
 	if desiredScale < 0 && !pa.Status.IsActivating() {
 		logger.Debug("Metrics are not yet being collected.")
 		return desiredScale, nil