SYSTEMD-UDEV-SETTLE.SERVICsystemd-udev-settle.seSYSTEMD-UDEV-SETTLE.SERVICE(8)
NAME
systemd-udev-settle.service - Wait for all pending udev events to be
handled
SYNOPSIS
systemd-udev-settle.service
DESCRIPTION
This service calls udevadm settle to wait until all events that have
been queued by udev(7) have been processed. It is a crude way to wait
until "all" hardware has been discovered. Services may pull in this
service and order themselves after it to wait for the udev queue to be
empty.
Using this service is not recommended. There can be no guarantee that
hardware is fully discovered at any specific time, because the kernel
does hardware detection asynchronously, and certain buses and devices
take a very long time to become ready, and also additional hardware may
be plugged in at any time. Instead, services should subscribe to udev
events and react to any new hardware as it is discovered. Services
that, based on configuration, expect certain devices to appear, may
warn or report failure after a timeout. This timeout should be tailored
to the hardware type. Waiting for systemd-udev-settle.service usually
slows boot significantly, because it means waiting for all unrelated
events too.
SEE ALSO
udev(7), udevadm(8)
systemd 245 SYSTEMD-UDEV-SETTLE.SERVICE(8)