Re: [RFC PATCH] virtio-net: introduce strict peer feature check

["Michael S. Tsirkin" <mst@redhat.com>]

On Wed, Nov 19, 2025 at 10:06:16AM +0800, Jason Wang wrote:
> On Sun, Nov 16, 2025 at 2:45 PM Michael S. Tsirkin <mst@redhat.com> wrote:
> >
> > On Fri, Nov 14, 2025 at 09:51:00AM +0800, Jason Wang wrote:
> > > > So IIUC there will be a cluster, it may contain different groups of hosts,
> > > > each group should have similar setups so that VMs can freely migrate
> > > > between each other within the same group (but may not easily migratable
> > > > across groups?).  But I don't think I know well on that part in practise.
> > >
> > > Towards this, we may need to develop tools somewhere to report TAP
> > > capability. Or as replied in another thread, developing software
> > > fallback for new features, but it seems a burden.
> >
> > Or more generally, host capability from QEMU POV.
> 
> Or you mean managment POV actually, for example TAP is usually created
> by libvirt.
> 
> Thanks

So what you propose is really this:

1- create tap
2- run qemu check that it did not fail
3- if it fails guess what the right set of flags is to make it not fail
  and switch to that


and I am saying qemu should help with 3.


> >
> > --
> > MST
> >