RE: [PATCH v5 1/4] domctl: introduce a new domain create flag, XEN_DOMCTL_CDF_evtchn_fifo, ...

["Durrant, Paul" <pdurrant@xxxxxxxxxxxx>]

> -----Original Message-----
[snip]
> >> I've gone from you saying "You really need a solution that can restore
> >> the old VM environment, at least temporarily, for that customer." The
> >> "temporarily" to me implies that it is at least an option to tie a
> >> certain guest to a certain Xen version for in-guest upgrading purposes.
> >  >

Not necessarily.

> >> If the deal with the customer doesn't include running on a certain Xen
> >> version, I don't see how this could have non-temporary consequences to
> >> the cloud provider.
> >
> > I think by "you", you mean Paul and not me?
> 
> Oh, right, I didn't pay attention to who wrote that text. Sorry.
> 

By temporary I mean that we may want to time-limit turning off a certain part 
of the ABU because, whilst it is problematic for some customers, it could (and 
is likely to) have measurable benefits to others. Thus you keep the feature off 
only until any customers running OS that have problems have upgraded their 
installations.

  Paul