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man: remove recommendation to pull in slices from slices.target

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That recommendation is likely to cause more trouble and for pretty
much all end-user units is not useful. Let's recommend relying on
the implicit dependency instead.

Fixes #10015.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2018-09-14 16:39:47 +02:00
parent 23a9ffb093
commit 4aabca0058
1 changed files with 10 additions and 6 deletions
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16
man/systemd.special.xml
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@ -596,14 +596,18 @@
<listitem>
<para>A special target unit that sets up all slice units (see
<citerefentry><refentrytitle>systemd.slice</refentrytitle><manvolnum>5</manvolnum></citerefentry>
for details) that shall be active after boot. By default the generic
<filename>system.slice</filename> slice unit, as well as the root slice unit
<filename>-.slice</filename>, is pulled in and ordered before this unit (see
for details) that shall always be active after boot. By default the generic
<filename>system.slice</filename> slice unit as well as the root slice unit
<filename>-.slice</filename> are pulled in and ordered before this unit (see
below).</para>
<para>It's a good idea to add <varname>WantedBy=slices.target</varname> lines to the
<literal>[Install]</literal> section of all slices units that may be installed
dynamically.</para>
<para>Adding slice units to <filename>slices.target</filename> is generally not
necessary. Instead, when some unit that uses <varname>Slice=</varname> is started, the
specified slice will be started automatically. Adding
<varname>WantedBy=slices.target</varname> lines to the <literal>[Install]</literal>
section should only be done for units that need to be always active. In that case care
needs to be taken to avoid creating a loop through the automatic dependencies on
"parent" slices.</para>
</listitem>
</varlistentry>
<varlistentry>