RE: [Xen-devel] shutdown question - PV vs HVM

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

> > > If I understand the code correctly, as soon as I see the
> > > control/shutdown node appear, I should read it, and then write a
> blank
> > > string into it, which acknowledges the shutdown request and stops
> the
> > > forced shutdown. I should then give windows the shutdown or reboot
> > > command, depending on what I read from the xenstore node.
> > >
> > > Sound good?
> >
> > Yep, that sounds about right.
> >
> 
> Hmmm... I am writing a blank string into the shutdown node, but xen
> still performs the reboot about 30 seconds later... The blank string
is
> definitely getting written as I can do a xenstore-read from dom0 and
it
> shows blank.
> 
> The only thing I can see that is different is that linux does it in a
> transaction, while I don't. Would that make a difference?
> 

I implemented transactions, and it doesn't appear that having a
transaction makes a difference. The shutdown happens exactly 30 second
after I initiate the shutdown from dom0.

Looking at the code (XendDomainInfo), the only relevant hvm check that I
can see is:

"
# HVM domain shuts itself down only if it has PV drivers
if self.info.is_hvm():
  hvm_pvdrv = xc.hvm_get_param(self.domid, HVM_PARAM_CALLBACK_IRQ)
  if not hvm_pvdrv:
    code = REVERSE_DOMAIN_SHUTDOWN_REASONS[reason]
    log.info("HVM save:remote shutdown dom %d!", self.domid)
    xc.domain_shutdown(self.domid, code)
"

And xend is obviously detecting my PV drivers successfully... the
following gets logged in xend.log:

"
[2007-10-06 18:06:55 4240] DEBUG (__init__:1072)
XendDomainInfo.shutdown(reboot)
[2007-10-06 18:06:55 4240] DEBUG (__init__:1072)
XendDomainInfo.handleShutdownWatch
[2007-10-06 18:06:55 4240] DEBUG (__init__:1072)
XendDomainInfo.handleShutdownWatch
[2007-10-06 18:07:25 4240] INFO (__init__:1072) Domain shutdown timeout
expired: name=virtdemo id=61
[2007-10-06 18:07:25 4240] DEBUG (__init__:1072) XendDomainInfo.destroy:
domid=61
[2007-10-06 18:07:25 4240] DEBUG (__init__:1072)
XendDomainInfo.destroyDomain(61)
"

Do I need to do something to shutdown_start_time to give me more time to
do the shutdown? I can't see that in 'xenstore-ls', and the only
reference to it is in XendDomainInfo...

The only other thing I can think of is that I need to tell xend that I
am shutting down the domain, and that writing a blank string to
control/shutdown isn't what is required...

Any suggestions?

Thanks

James


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel