Watchdog

Post Reply
sundqjan
Posts: 6
Joined: Tue May 12, 2015 1:00 pm

Watchdog

Post by sundqjan »

According to specifications there should be a hardware watchdog available on fitlet-B. However, we can't find anything about this in the BIOS.
Maybe it's always enabled?

We want to use it in Linux. Do we need to use any any specific kernel module to make it work?

Arwen
Posts: 145
Joined: Sun Nov 20, 2011 10:43 pm

Re: Watchdog

Post by Arwen »

I've used small computer watchdogs before, but not recently. A quick check of my
system showed the following.

Gentoo Linux shows this package as being available;

Code: Select all

*  sys-apps/watchdog
      Latest version available: 5.13-r1
      Latest version installed: [ Not Installed ]
      Size of files: 197 KiB
      Homepage:      http://sourceforge.net/projects/watchdog/
      Description:   A software watchdog and /dev/watchdog daemon
      License:       GPL-2
I installed it and that seems like a nice package, lots of configuration options.

Linux Kernel 4.0.4, shows these options for watchdogs;

Code: Select all

fitlet:/usr/src/linux> grep -i dog .config
CONFIG_CLOCKSOURCE_WATCHDOG=y
CONFIG_WATCHDOG=y
CONFIG_WATCHDOG_CORE=y
# CONFIG_WATCHDOG_NOWAYOUT is not set
# Watchdog Device Drivers
# CONFIG_SOFT_WATCHDOG is not set
# CONFIG_XILINX_WATCHDOG is not set
# CONFIG_DW_WATCHDOG is not set
# CONFIG_SBC_FITPC2_WATCHDOG is not set
# CONFIG_HP_WATCHDOG is not set
# CONFIG_SBC_EPX_C3_WATCHDOG is not set
# PCI-based Watchdog Cards
# CONFIG_PCIPCWATCHDOG is not set
# USB-based Watchdog Cards
# CONFIG_USBPCWATCHDOG is not set
In my case, I plan to install my fitlet on an A.C. power switch that can perform pings.
If the device is not responding, power cycle. It's a watchdog of some sort. We use
fancier ones at work called F-5s, that actually will load a web page or test the
application. These F-5s can't reboot servers, but they can shift the load to working
units and do alarm.
Arwen Evenstar
Rivendale, Middle Earth

Post Reply

Return to “fitlet BIOS”