NAME    [Toc]    [Back]

     watchdog -- Software watchdog

SYNOPSIS    [Toc]    [Back]

     options WATCHDOG

DESCRIPTION    [Toc]    [Back]

     watchdog is a set of checks and routines which allow the implementation
     of a software watchdog solution.

     The user interface for watchdog is implemented via a trio of sysctl OIDs.
     When debug.watchdog.enabled is set to a positive value, watchdog timeout
     checks are performed.  In order to keep the watchdog from triggering,
     debug.watchdog.reset must be accessed, by reading or writing, within
     every debug.watchdog.timeout seconds.  Failure to keep the watchdog
     updated will result in the kernel outputting interrupt counts, backtraces,
 and then attempting to enter ddb(9).

SEE ALSO    [Toc]    [Back]

     sysctl(8), watchdogd(8)

HISTORY    [Toc]    [Back]

     The watchdog code first appeared in FreeBSD 5.1.

AUTHORS    [Toc]    [Back]

     The watchdog code and manual page were written by Sean Kelly
     <smkelly@FreeBSD.org>.  Some contributions were made by Jeff Roberson
     <jeff@FreeBSD.org>.


FreeBSD 5.2.1			 June 25, 2003			 FreeBSD 5.2.1