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man: use markup more in description of ManagedOOMPreference=

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Follow-up for d8a4d64bc37ad21381f584b6c25792995584c7a2.
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Zbigniew Jędrzejewski-Szmek 2021-02-25 13:25:35 +01:00
parent beca342dba
commit 326152af4d
1 changed files with 21 additions and 18 deletions
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39
man/systemd.resource-control.xml
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@ -918,31 +918,34 @@ DeviceAllow=/dev/loop-control
<term><varname>ManagedOOMPreference=none|avoid|omit</varname></term>
<listitem>
<para>Allows deprioritizing or omitting this unit's cgroup as a candidate when <command>systemd-oomd</command>
needs to act. Requires support for extended attributes (see
<para>Allows deprioritizing or omitting this unit's cgroup as a candidate when
<command>systemd-oomd</command> needs to act. Requires support for extended attributes (see
<citerefentry project='man-pages'><refentrytitle>xattr</refentrytitle><manvolnum>7</manvolnum></citerefentry>)
in order to use <option>avoid</option> or <option>omit</option>. Additionally, <command>systemd-oomd</command>
will ignore these extended attributes if the unit's cgroup is not owned by the root user.</para>
in order to use <option>avoid</option> or <option>omit</option>. Additionally,
<command>systemd-oomd</command> will ignore these extended attributes if the unit's cgroup is not
owned by the root user.</para>
<para>If this property is set to <option>avoid</option>, the service manager will set the
"user.oomd_avoid" extended attribute on the unit's cgroup to "1". If <command>systemd-oomd</command> sees
this extended attribute on a cgroup set to "1" when choosing between candidates, it will only select the
cgroup with "user.oomd_avoid" if there are no other viable candidates.</para>
<literal>user.oomd_avoid</literal> extended attribute on the unit's cgroup to <literal>1</literal>.
If <command>systemd-oomd</command> sees this extended attribute on a cgroup set to
<literal>1</literal> when choosing between candidates, it will only select the cgroup with
<literal>user.oomd_avoid</literal> if there are no other viable candidates.</para>
<para>If this property is set to <option>omit</option>, the service manager will set the "user.oomd_omit"
extended attribute on the unit's cgroup to "1". If <command>systemd-oomd</command> sees the this extended
attribute on the cgroup set to "1", it will ignore the cgroup as a candidate and will not perform any actions
on the cgroup.</para>
<para>If this property is set to <option>omit</option>, the service manager will set the
<literal>user.oomd_omit</literal> extended attribute on the unit's cgroup to <literal>1</literal>.
If <command>systemd-oomd</command> sees the this extended attribute on the cgroup set to
<literal>1</literal>, it will ignore the cgroup as a candidate and will not perform any actions on
the cgroup.</para>
<para>It is recommended to use <option>avoid</option> and <option>omit</option> sparingly as it can adversely
affect <command>systemd-oomd</command>'s kill behavior. Also note that these extended attributes are not
applied recursively to cgroups under this unit's cgroup.</para>
<para>It is recommended to use <option>avoid</option> and <option>omit</option> sparingly, as it
can adversely affect <command>systemd-oomd</command>'s kill behavior. Also note that these extended
attributes are not applied recursively to cgroups under this unit's cgroup.</para>
<para>Defaults to <option>none</option> which means no extended attributes will be set and systemd-oomd will
sort this unit's cgroup as defined in
<para>Defaults to <option>none</option> which means no extended attributes will be set and
<command>systemd-oomd</command> will sort this unit's cgroup as defined in
<citerefentry><refentrytitle>systemd-oomd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
and <citerefentry><refentrytitle>oomd.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> (if this
unit's cgroup becomes a candidate).</para>
and <citerefentry><refentrytitle>oomd.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>
(if this unit's cgroup becomes a candidate).</para>
</listitem>
</varlistentry>
</variablelist>