On Fri, 4 Jan 2019 20:00:50 -0200 Eduardo Habkost <ehabk...@redhat.com> wrote:
> On Fri, Jan 04, 2019 at 04:13:15PM -0500, Michael S. Tsirkin wrote: > > On Fri, Jan 04, 2019 at 07:06:56PM -0200, Eduardo Habkost wrote: > > > On Fri, Jan 04, 2019 at 03:48:02PM -0500, Michael S. Tsirkin wrote: > > > > On Fri, Jan 04, 2019 at 06:09:52PM -0200, Eduardo Habkost wrote: > > > > > Anyway, while writing this I noticed another issue: many of the > > > > > virtio devices in QEMU 2.6 were already modern-only! > > > > > > > > > > Setting disable-modern=off on modern-only devices like virtio-vga > > > > > or virtio-tablet-pci doesn't make sense. This means setting > > > > > virtio-pci.disable-modern=off on HW_COMPAT_2_6 was incorrect even > > > > > before the -non-transitional and -transitional device types were > > > > > introduced. > > > > > > > > > > > > It did create an opportunity to create non working devices. > > > > > > > > Whether that's incorrect as such I'm not sure. > > > > > > This is not just creating the opportunity for an user to > > > disable-modern=on. HW_COMPAT_2_6 is actually setting > > > disable-modern=on on virtio-vga and other modern-only devices. > > > Sounds like a mistake to me. > > > > > > Luckily those modern-only devices silently ignore the > > > disable-modern/disable-legacy properties, but this might change > > > in the future. > > > > Worry about it then? > > Right, we don't need to worry about it today. But if a solution > to the crash reported by Thomas will make the problem go away, > that's even better. It seems your patch with the modern-only devices removed from the list would achieve that?
