Re: [Qemu-devel] Rethinking missed tick catchup

[Anthony Liguori <anthony@codemonkey.ws>]

Avi Kivity <avi@redhat.com> writes:

> On 09/13/2012 06:50 PM, Anthony Liguori wrote:
>>>> 
>>>>> This may not work for really old server oriented guests.
>>>> 
>>>> S3 requires guest cooperation, period.  But so does qemu-ga.  It's
>>>> better than nothing, and we can't get perfection without guest cooperation.
>>>
>>> qemu-ga requires either an admin/tool to install qemu-ga, or for qemu-ga
>>> to be preinstalled by the OS vendor.  S3 requires S3 support to be
>>> provided by the host vendor, and for it to be functional.  A
>>> significantly easier bar to clear.
>> 
>> We can easily generate an ISO that includes a pre-built version of
>> qemu-ga.
>
> We could easily generate water, but we can't make the horse drink it.
>
>> 
>> Plus, there's a whole variety of other features enabled once we can
>> assume qemu-ga is available.  It's worth solving that problem.
>
> We can't assume it.  Too many OSes exist, too many guests are already
> exist and ain't broken, too many vendors are moving into a locked-down
> model.  I agree it's great and we should take advantage of it, but we
> can't assume it's there.

All the same can be said about virtio yet we still add features that
depend on it.

If there was a better/equivalent solution that didn't depend on qemu-ga,
I'd be all for it.  But there isn't AFAICT.

Regards,

Anthony Liguori

>
> -- 
> error compiling committee.c: too many arguments to function