Re: [Qemu-devel] change x86 default machine type to Q35?

[Paolo Bonzini]

On 11/07/2017 16:42, Kevin Wolf wrote:
>>>  Concerning QEMU, could we maybe simply emit a warning a la
>>>
>>>  "you did not specify a machine type with the -M option, so you are
>>>   currently running the the 'pc' machine type. Please note that
>>> future
>>>   versions of QEMU might use the 'q35' machine type instead. If you
>>>   require the 'pc' machine type for your setting, then please specify
>>>   it with the -M option."
>> Warnings tend to get ignored until things are actually break, so I
>> don't think this helps much.  I think simply not having a default
>> machine type (as already suggested elsewhere in this thread) is the
>> best way to deal with this.
> I would absolutely hate this. One of the nice things about qemu has
> always been that 'qemu disk.img' is enough to start a simple VM. You
> only need to touch any other options for things you care about. I
> wouldn't want to give this up.

I agree.  Don't change anything, leave "-M pc" aside, and let libosinfo
pick q35 for newer guests.

Paolo