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ipmi_watchdog_action.5 (2010 09)

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ipmi_watchdog_action(5) ipmi_watchdog_action(5)
(Tunable Kernel Parameters)
NAME
ipmi_watchdog_action - sets action taken if IPMI watchdog timer expires
VALUES
Failsafe
0 (no action)
Default
0 (no action)
Allowed values
0 No action will be taken
1 Hard reset the system (or partition, on cellular systems)
2 Turn off power (valid on non-cellular systems only)
3 Power system off, then back on (valid on non-cellular systems only)
Recommended values
The value used depends on what the system administrator wants to happen if the system can not make
forward progress.
DESCRIPTION
The
ipmi_watchdog_action
tunable sets the watchdog timer expiration action on systems with the
IPMI (Intelligent Platform Management Interface) watchdog timer.
To tell if a system has this feature use
ioscan -fnkC ipmi.Ifipmi is listed, the IPMI watchdog
timer is supported.
HP’s Itanium Product Family systems and recent PA RISC systems use IPMI as part of the system
manageability infrastructure. IPMI uses a "watchdog timer" to detect conditions where the operating sys-
tem has hung or is not responding. The action configured using the tunable
ipmi_watchdog_action
will take place automatically when this situation occurs.
For instance, if set to
1, the system (or partition, on cellular systems) will hard reset if the OS is hung or
not responding.
Who Is Expected to Change This Tunable?
System administrators that want the system to take an action if system forward progress stops.
Restrictions on Changing
None. This tunable is dynamic.
What Other Tunable Values Should Be Changed at the Same Time?
None.
WARNINGS
All HP-UX kernel tunable parameters are release specific. This parameter may be removed or have its
meaning changed in future releases of HP-UX.
Installation of optional kernel software, from HP or other vendors, may cause changes to tunable parame-
ter values. After installation, some tunable parameters may no longer be at the default or recommended
values. For information about the effects of installation on tunable values, consult the documentation for
the kernel software being installed. For information about optional kernel software that was factory
installed on your system, see HP-UX Release Notes at
http://www.hp.com/go/hpux-core-docs
.
AUTHOR
ipmi_watchdog_action was developed by HP.
SEE ALSO
kctune(1M), sam(1M), gettune(2), settune(2).
HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1

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