On 07.06.21 12:12, Olaf Hering wrote:
> Am Wed, 2 Jun 2021 14:03:40 +0200
> schrieb Juergen Gross <jgross@suse.com>:
> 
>> Maybe XEN_DOMCTL_PFINFO_XALLOC should no longer be supported, i.e.
>> a stream containing it should be rejected? This might be a
>> worthwhile modification of patch 5.
> 
> If there is a desire to actively break incoming domUs from pre-4.6 hosts, this should probably be done in a separate change.
> 
> I have not checked if such migration works today with unmodified xen.git#staging.

At least with your patch this might change now, as you are modifying
the behavior in case of XEN_DOMCTL_PFINFO_XALLOC.

Officially pre-4.6 hosts are not supported regarding LM. So your patch
should be fine in this regard. OTH I'd rather have a clear failure than
a maybe weird behavior in case a stream is containing a record with
XEN_DOMCTL_PFINFO_XALLOC.


Juergen