+# This barrier service is usually not enabled by default. If enabled,
+# it acts as a barrier for basic.target -- so all later services will
+# wait for udev completely finishing its coldplug run.
+#
+# It might be enabled just unconditionally, or pulled-in on-demand by
+# broken or non-hotplug-aware services that assume a fully populated
+# /dev at startup.
+