[libvirt] [Qemu-devel] [PATCH 3/5] qemu: add QEMU_CAPS_MACHINE_VMPORT_OPT

Peter Maydell peter.maydell at linaro.org
Mon Apr 20 14:54:20 UTC 2015

On 20 April 2015 at 13:39, Marc-André Lureau <marcandre.lureau at gmail.com> wrote:
> Hi
> On Tue, Apr 14, 2015 at 6:07 PM, Eric Blake <eblake at redhat.com> wrote:
>> > +    { "machine", "vmport", QEMU_CAPS_MACHINE_VMPORT_OPT },
>> Ouch.  qemu commit 0a7cf21 fixes what would have been a regression in
>> 2.3 at exposing "mem-merge" through query-command-line-options, but it
>> does NOT expose "vmport", which is a per-architecture option rather than
>> a generic -machine option.  Which means that even though qemu 2.2
>> (perhaps wrongly) advertised "vmport" for all machines (even when it was
>> not supported), 2.3 will not advertise it, and we are hoping for a
>> better solution in 2.4 for properly advertising vmport on an
>> as-appropriate basis.
> Thanks Eric for finding out this regression.
> Is anybody working on a better solution? I can imagine either a new qmp
> machine-list-properties, or perhaps more reasonably a new properties array
> in query-machines reply.

Unless this is an absolutely critical "we cannot ship 2.3 without
a fix" bug (in which case somebody should yell now and you really
need a patch on the list within a day or so), you've probably missed
the 2.3 boat at this point.

-- PMM

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