Watchdog

up floh

Hi,
Did one of you already enable the hw watchdog?
I have a /dev/watchdog in /dev which looks OK.
I installed the watchdog package, made it point at /dev/watchdog, started the watchdog (/etc/init.d/watchdog, seems it has no unit file) and then kill -9'd the process.
It seems it wasn't restarted via systemd and the system stays up.

I'm not sure if I just missed a BIOS setting or what's wrong with it.

root@dhcp106:~# ps -ef | grep watch
root        10     2  0 04:41 ?        00:00:00 [watchdog/0]
root        11     2  0 04:41 ?        00:00:00 [watchdog/1]
root        16     2  0 04:41 ?        00:00:00 [watchdog/2]
root        21     2  0 04:41 ?        00:00:00 [watchdog/3]
root      2322  1361  0 05:05 pts/0    00:00:00 grep watch
root@dhcp106:~# 
root@dhcp106:~# ls -l /dev/watchdog
crw------- 1 root root 10, 130 Aug 17 04:41 /dev/watchdog
root@dhcp106:~# grep /dev/watchdog /etc/watchdog.conf 
watchdog-device	= /dev/watchdog
root@dhcp106:~# /etc/init.d/watchdog start
[ ok ] Starting watchdog (via systemctl): watchdog.service.
root@dhcp106:~# ps -ef | grep watch
root        10     2  0 04:41 ?        00:00:00 [watchdog/0]
root        11     2  0 04:41 ?        00:00:00 [watchdog/1]
root        16     2  0 04:41 ?        00:00:00 [watchdog/2]
root        21     2  0 04:41 ?        00:00:00 [watchdog/3]
root      2403     1  0 05:06 ?        00:00:00 /usr/sbin/watchdog
root      2423  1361  0 05:06 pts/0    00:00:00 grep watch
root@dhcp106:~# 
root@dhcp106:~# kill -9 2403 ; sleep 100 ; echo "we r fail"
we r fail

Any ideas?

I'll look back at the BIOS soon, maybe it's just something I missed there.

DCleri

Hi darkfader,

As root, if you run 'touch /dev/watchdog0' it is enough to activate the watchdog timer.
The timer expires by default after a certain amount of time (I thought it should be 60 seconds, but it seems more like 40-50 seconds in the tests I ran).
If you don't "feed it" again before the timer expires, the UP board will automatically reboot.

To feed it, you can run 'echo 1 > /dev/watchdog0'