678f2b1667
systemd-udev-trigger.service by default triggeres all devices regardless of whether they were already recognized by systemd-udevd. There are machines (especially in embedded environments) where systemd-udev-trigger.service is configured to run at a later stage of the boot sequence, which can lead to quite a lot of devices being triggered although they were already recognized by systemd-udevd. Re-triggering a lot of devices is a relatively expensive operation and therefore should be avoided if unnecessary. Therefore this patch introduces --initialized-nomatch, which filters out devices that are already present in the udev database. For consistance reasons --initialized-match is implemented as well, which filters out devices that are *not* already present in the udev database. Replaces #19949.
System and Service Manager
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