Re: domain pause vs. watchdog timer

[Laszlo Ersek <lersek@redhat.com>]

On 10/13/11 16:56, Keir Fraser wrote:
> On 13/10/2011 15:38, "Laszlo Ersek"<lersek@redhat.com>  wrote:
>
>> On 10/13/11 16:21, Jan Beulich wrote:
>>>>>> On 13.10.11 at 15:41, Laszlo Ersek<lersek@redhat.com>   wrote:
>>>> if a domain is paused (= not scheduled), its process that keeps
>>>> otherwise kicking /dev/watchdog and (thusly the hypervisor) "freezes"
>>>> too. Should pausing a domain suspend (or "inactivate") its watchdog_timers?
>>>
>>> I would say yes it should. And you say it doesn't?
>>
>> I must have missed a changeset (or a hunk?) related to pausing:
>>
>> https://bugzilla.redhat.com/show_bug.cgi?id=742880#c1
>>
>> I backported 21529 from xen-unstable to the RHEL-5 hypervisor version,
>> and Igor tested pausing a Fedora 16 HVM guest. The domU was destroyed
>> while it was paused.
>
> You are just as likely to upset a watchdog implemented entirely internally
> to the guest, and which we have no chance to disable/suspend when a domain
> is paused. Domain pausing from the dom0 command line really doesn't have a
> production use case afaik -- just don't do it is my helpful suggestion.

Thank you both for the answers.
L.