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-rw-r--r-- | man/systemd-udev-settle.service.xml | 51 |
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diff --git a/man/systemd-udev-settle.service.xml b/man/systemd-udev-settle.service.xml new file mode 100644 index 0000000..2852f31 --- /dev/null +++ b/man/systemd-udev-settle.service.xml @@ -0,0 +1,51 @@ +<?xml version='1.0'?> +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" + "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> +<!-- SPDX-License-Identifier: LGPL-2.1-or-later --> + +<refentry id="systemd-udev-settle.service" + xmlns:xi="http://www.w3.org/2001/XInclude"> + + <refentryinfo> + <title>systemd-udev-settle.service</title> + <productname>systemd</productname> + </refentryinfo> + + <refmeta> + <refentrytitle>systemd-udev-settle.service</refentrytitle> + <manvolnum>8</manvolnum> + </refmeta> + + <refnamediv> + <refname>systemd-udev-settle.service</refname> + <refpurpose>Wait for all pending udev events to be handled</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <para><filename>systemd-udev-settle.service</filename></para> + </refsynopsisdiv> + + <refsect1><title>Description</title> + <para>This service calls <command>udevadm settle</command> to wait until all events that have been queued + by <citerefentry><refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum></citerefentry> 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.</para> + + <para><emphasis>Using this service is not recommended.</emphasis> 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 + <filename>systemd-udev-settle.service</filename> usually slows boot significantly, because it means waiting + for all unrelated events too.</para> + </refsect1> + + <refsect1> + <title>See Also</title> + <para> + <citerefentry><refentrytitle>udev</refentrytitle><manvolnum>7</manvolnum></citerefentry>, + <citerefentry><refentrytitle>udevadm</refentrytitle><manvolnum>8</manvolnum></citerefentry> + </para> + </refsect1> +</refentry> |