[Qemu-discuss] how to setup a watchdog?

[lejeczek]

hi everybody, I tried to get a help on libvirt mailing list 
but not luck, I hope maybe here?

I'm trying Qemu's watchdog.
My understanding was that hardware (here qemu's watchdog) 
would take
action, eg. cold reboot) the system if there is no ping from 
the OS watchdog, so I
thought stopping watchdog service in VM should be a quick test.

I have this in the guest:

    <watchdog model='i6300esb' action='reset'>
      <address type='pci' domain='0x0000' bus='0x00' 
slot='0x08' function='0x0'/>
    </watchdog>

and I see /dev/watchdog in my guest. Yet nothing happens, 
guest runs uninterrupted.
I must be missing something, an expert said it's config 
problem?
many thanks