[virt-tools-list] [PowerKVM][RFC]setting machine type in virt-manager

[Li Zhang]

On 12/05/2011 03:23 AM, Richard W.M. Jones wrote:
> On Wed, Nov 30, 2011 at 08:27:14AM -0700, Eric Blake wrote:
>> On 11/30/2011 02:01 AM, Li Zhang wrote:
>>>> - Never show anything about the machine type for i686/x86_64 guests.
>>>> Reason is that on fedora at least we have machine types like fedora13,
>>>> fedora14, etc. which maybe confuse the user into thinking it has
>>>> something to do with the OS installed in the guest (which it doesn't at
>>>> all).
>>>>
>>>> Thanks,
>>>> Cole
>>>>
>>>
>>> Hi Cole,
>>>
>>> Understand.
>>> BTW, Isn't machine type 'pc' for X86 architecture?
>>> fedora13 and fedora4 seem like OS type.
>>> Would you please correct me if I am wrong?
>>
>> Machine type 'fedora-13' is a Fedora-specific alias for machine type
>> 'pc-0.13' - that is, Fedora 13 was using qemu 0.12 but backported a
>> patch that added some machine features from qemu 0.13, so it invented
>> the name 'fedora-13' to expose those differences in default
>> capabilities.  It is a deprecated machine type (see bug
>> https://bugzilla.redhat.com/show_bug.cgi?id=754772), and there are plans
>> to silently convert 'fedora-13' into 'pc-0.13' prior to Fedora 18.
>>
>> It has nothing to do with whether the guest or the host is running
>> Fedora 13 or any other version (although it will only appear in qemu
>> running on a fedora host).
>
> Does any guest really care about the machine type apart from Windows?
>
> Since we can detect guests, perhaps we should give Linux guests the
> latest machine type always?  (maybe doing this in a process outside
> libvirt)
>
> Rich.
>

I think mac will care about the machine type, if it only support macOS.
And I think if some guests are installed with old machine type, there
will be some problems to boot with latest machine type, if qemu set
the latest machine type as default.