if (d->state != DEVICE_DEAD)
/* So here's a special hack, to compensate for the fact that the udev database's reload cycles are not
* synchronized with our own reload cycles: when we detect that the SYSTEMD_WANTS property of a device
- * changes while the device unit is already up, let's manually trigger any new units listed in it not
- * seen before. This typically happens during the boot-time switch root transition, as udev devices
- * will generally already be up in the initrd, but SYSTEMD_WANTS properties get then added through udev
- * rules only available on the host system, and thus only when the initial udev coldplug trigger runs.
+ * changes while the device unit is already up, let's skip to trigger units that were already listed
+ * and are active, and start units otherwise. This typically happens during the boot-time switch root
+ * transition, as udev devices will generally already be up in the initrd, but SYSTEMD_WANTS properties
+ * get then added through udev rules only available on the host system, and thus only when the initial
+ * udev coldplug trigger runs.
*
* We do this only if the device has been up already when we parse this, as otherwise the usual
* dependency logic that is run from the dead → plugged transition will trigger these deps. */
STRV_FOREACH(i, added) {
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
- if (strv_contains(d->wants_property, *i)) /* Was this unit already listed before? */
- continue;
+ if (strv_contains(d->wants_property, *i)) {
+ Unit *v;
+
+ v = manager_get_unit(u->manager, *i);
+ if (v && UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(v)))
+ continue; /* The unit was already listed and is running. */
+ }
r = manager_add_job_by_name(u->manager, JOB_START, *i, JOB_FAIL, NULL, &error, NULL);
if (r < 0)