Re: [PULL v2 00/13] misc patches removing deprecated features

[Ian Jackson]

Peter Maydell writes ("Re: [PULL v2 00/13] misc patches removing deprecated 
features"):
> On Thu, 18 Mar 2021 at 09:30, Daniel P. Berrangé <berrange@redhat.com> wrote:
> > ----------------------------------------------------------------
> > Remove many old deprecated features
> >
> > The following features have been deprecated for well over the 2
> > release cycle we promise
> >
> >   ``-drive file=json:{...{'driver':'file'}}`` (since 3.0)
> >   ``-vnc acl`` (since 4.0.0)
> >   ``-mon ...,control=readline,pretty=on|off`` (since 4.1)
> >   ``migrate_set_downtime`` and ``migrate_set_speed`` (since 2.8.0)
> >   ``query-named-block-nodes`` result ``encryption_key_missing`` (since 
> > 2.10.0)
> >   ``query-block`` result ``inserted.encryption_key_missing`` (since 2.10.0)
> >   ``migrate-set-cache-size`` and ``query-migrate-cache-size`` (since 2.11.0)
> >   ``query-named-block-nodes`` and ``query-block`` result 
> > dirty-bitmaps[i].status (since 4.0)
> >   ``query-cpus`` (since 2.12.0)
> >   ``query-cpus-fast`` ``arch`` output member (since 3.0.0)
> >   ``query-events`` (since 4.0)
> >   chardev client socket with ``wait`` option (since 4.0)
> >   ``acl_show``, ``acl_reset``, ``acl_policy``, ``acl_add``, ``acl_remove`` 
> > (since 4.0.0)
> >   ``ide-drive`` (since 4.2)
> >   ``scsi-disk`` (since 4.2)
> 
> Just FYI, it turns out that removing 'query-cpus' has broken Xen,
> whose libxl control library is still using it:
> 
> https://lists.xenproject.org/archives/html/xen-devel/2021-03/msg01178.html
> 
> This suggests we should probably try to coordinate a bit better
> with Xen as one of our downstream QMP users.
> 
> Am I right in thinking that QEMU now has an option that Xen
> could turn on in their CI for "make attempts to use deprecated
> features fail" so they could catch them earlier in the
> deprecate-and-delete cycle?

That would be really great for us.

Thanks,
Ian.