On Mon, Jul 10, 2017 at 10:42:26AM +0300, Marcel Apfelbaum wrote: > On 07/07/2017 21:03, Eduardo Habkost wrote: > > On Fri, Jul 07, 2017 at 06:17:57PM +0300, Michael S. Tsirkin wrote: > > > On Fri, Jul 07, 2017 at 10:39:49AM -0300, Eduardo Habkost wrote: > > > > On Wed, Jul 05, 2017 at 12:32:10PM +0300, Marcel Apfelbaum wrote: [...] > > > > > > > > > > The upper layers should manage the defaults by themselves so > > > > > are not supposed to be affected. > > > > > > > > But they would be. libvirt uses the default machine-type from > > > > QEMU. > > > > > > How about extending the command for supported machines with a > > > recommended machine type, and teaching libvirt to use that? > > > > I don't think QEMU has enough information to decide if it should > > recommend "q35" or "pc". > > We don't really need a complicated rule set, we would just recommend q35 > by default. Libvirt will try to create the default machine and if fails > for some reason (what would it be?) it can switch to PC. > > The advanced logic would be "old systems should use PC", where old > means Windows XP and before and so on. But this logic should appear > in management layers above.
In this case, is there any difference between "changing the default to q35" and "recommending q35", for libvirt users? -- Eduardo
