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Date: Tue, 11 Jul 2017 16:42:15 +0200
From: Kevin Wolf <kwolf@redhat.com>
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Subject: Re: [Qemu-devel] change x86 default machine type to Q35?
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To: Gerd Hoffmann <kraxel@redhat.com>
Cc: Thomas Huth <thuth@redhat.com>, Eduardo Habkost <ehabkost@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>, "Tian, Kevin" <kevin.tian@intel.com>, libvir-list@redhat.com, qemu-devel@nongnu.org, Paolo Bonzini <pbonzini@redhat.com>, Marcel Apfelbaum <marcel@redhat.com>, Chao Peng <chao.p.peng@linux.intel.com>, Laszlo Ersek <lersek@redhat.com>

Am 11.07.2017 um 10:13 hat Gerd Hoffmann geschrieben:
>   Hi,
>=20
> >=A0Concerning QEMU, could we maybe simply emit a warning a la
> >=20
> > =A0"you did not specify a machine type with the -M option, so you are
> > =A0 currently running the the 'pc' machine type. Please note that
> > future
> > =A0 versions of QEMU might use the 'q35' machine type instead. If you
> > =A0 require the 'pc' machine type for your setting, then please speci=
fy
> > =A0 it with the -M option."
>=20
> 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.

Kevin