[Xen-devel] RE: backend block driver and domain migration blackout time

["Guzovsky, Eduard" <Eduard.Guzovsky@xxxxxxxxxxx>]

Thanks,

-Ed


> -----Original Message-----
> From: Keir Fraser [mailto:keir.fraser@xxxxxxxxxxxxx]
> Sent: Tuesday, August 26, 2008 12:57 PM
> To: Guzovsky, Eduard; xen-devel@xxxxxxxxxxxxxxxxxxx
> Cc: Murray, Kimball
> Subject: Re: backend block driver and domain migration blackout time
> 
> On 26/8/08 17:36, "Guzovsky, Eduard" <Eduard.Guzovsky@xxxxxxxxxxx>
wrote:
> 
> >     dominfo._releaseDevices(force = True)
> >     wait_for_outstanding_vbd_io_complete() # "shutdown-done" in
xenstore
> >     unleash_the_target()
> >
> > just before the current
> >
> >     dominfo.destroyDomain()
> >     dominfo.testDeviceComplete()
> >
> > The complete xend patch is below. Works fine in our testing but is
this
> > a safe thing to do?
> 
> As long as domain's execution is quiesced (which it obviously is since
it
> will have responded to the suspend request and the state record has
been
> propagated to the target machine) and I/O is quiesced (well, block I/O
at
> least) then yes, it should logically be safe.
> 
>  -- Keir
> 


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