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documentation: add description for watchdog device path
Document the command line parameter and the system configuration file setting.
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@ -382,6 +382,15 @@
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>systemd.watchdog_device=</varname></term>
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<listitem>
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<para>Overwrites the watchdog device path <varname>WatchdogDevice=</varname>. For details, see
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<citerefentry><refentrytitle>systemd-system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>modules_load=</varname></term>
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<term><varname>rd.modules_load=</varname></term>
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@ -161,8 +161,10 @@
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<literal>d</literal>, <literal>w</literal>). If
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<varname>RuntimeWatchdogSec=</varname> is set to a non-zero
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value, the watchdog hardware
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(<filename>/dev/watchdog</filename>) will be programmed to
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automatically reboot the system if it is not contacted within
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(<filename>/dev/watchdog</filename> or the path specified with
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<varname>WatchdogDevice=</varname> or the kernel option
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<varname>systemd.watchdog-device=</varname>) will be programmed
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to automatically reboot the system if it is not contacted within
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the specified timeout interval. The system manager will ensure
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to contact it at least once in half the specified timeout
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interval. This feature requires a hardware watchdog device to
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@ -179,6 +181,15 @@
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available.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>WatchdogDevice=</varname></term>
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<listitem><para>Configure the hardware watchdog device that the
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runtime and shutdown watchdog timers will open and use. Defaults
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to <filename>/dev/watchdog</filename>. This setting has no
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effect if a hardware watchdog is not available.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>CapabilityBoundingSet=</varname></term>
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