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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 20:49:52 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 20:49:52 +0000
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Adding upstream version 255.4.upstream/255.4
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+<?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>