Re: [PATCH 00/14] deprecations: remove many old deprecations

[Jim Fehlig]

Adding xen-devel and Ian to cc.

On 2/24/21 6:11 AM, Daniel P. Berrangé wrote:
> The following features have been deprecated for well over the 2
> release cycle we promise

This reminded me of a bug report we received late last year when updating to 
5.2.0. 'virsh setvcpus' suddenly stopped working for Xen HVM guests. Turns out 
libxl uses cpu-add under the covers.

>    ``-usbdevice`` (since 2.10.0)
>    ``-drive file=3Djson:{...{'driver':'file'}}`` (since 3.0)
>    ``-vnc acl`` (since 4.0.0)
>    ``-mon ...,control=3Dreadline,pretty=3Don|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].sta=
> tus (ince 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`` (s=
> ince 4.0.0)
>    ``ide-drive`` (since 4.2)
>    ``scsi-disk`` (since 4.2)
>
> AFAICT, libvirt has ceased to use all of these too.

A quick grep of the libxl code shows it uses -usbdevice, query-cpus, and 
scsi-disk.

> There are many more similarly old deprecations not (yet) tackled.

The Xen tools maintainers will need to be more vigilant of the deprecations. I 
don't follow Xen development close enough to know if this topic has already been 
discussed.

Regards,
Jim