Re: [Xen-devel] domain pause vs. watchdog timer

[Laszlo Ersek <lersek@xxxxxxxxxx>]

On 10/13/11 16:56, Keir Fraser wrote:
> On 13/10/2011 15:38, "Laszlo Ersek"<lersek@xxxxxxxxxx>  wrote:
>
> > On 10/13/11 16:21, Jan Beulich wrote:
> > > > > > On 13.10.11 at 15:41, Laszlo Ersek<lersek@xxxxxxxxxx>   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.

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