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documentation: add description for watchdog device path

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Document the command line parameter and the system configuration file
setting.
This commit is contained in:
Edward A. James 2017-12-08 11:27:01 -06:00
parent 8a2c1fbfc3
commit c75396c30b
2 changed files with 22 additions and 2 deletions
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9
man/kernel-command-line.xml
View file

@ -382,6 +382,15 @@
</listitem>
</varlistentry>
<varlistentry>
<term><varname>systemd.watchdog_device=</varname></term>
<listitem>
<para>Overwrites the watchdog device path <varname>WatchdogDevice=</varname>. For details, see
<citerefentry><refentrytitle>systemd-system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>modules_load=</varname></term>
<term><varname>rd.modules_load=</varname></term>

15
man/systemd-system.conf.xml
View file

@ -161,8 +161,10 @@
<literal>d</literal>, <literal>w</literal>). If
<varname>RuntimeWatchdogSec=</varname> is set to a non-zero
value, the watchdog hardware
(<filename>/dev/watchdog</filename>) will be programmed to
automatically reboot the system if it is not contacted within
(<filename>/dev/watchdog</filename> or the path specified with
<varname>WatchdogDevice=</varname> or the kernel option
<varname>systemd.watchdog-device=</varname>) will be programmed
to automatically reboot the system if it is not contacted within
the specified timeout interval. The system manager will ensure
to contact it at least once in half the specified timeout
interval. This feature requires a hardware watchdog device to
@ -179,6 +181,15 @@
available.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>WatchdogDevice=</varname></term>
<listitem><para>Configure the hardware watchdog device that the
runtime and shutdown watchdog timers will open and use. Defaults
to <filename>/dev/watchdog</filename>. This setting has no
effect if a hardware watchdog is not available.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>CapabilityBoundingSet=</varname></term>