On Thu, Sep 26, 2019 at 09:26:22AM -0400, Michael S. Tsirkin wrote: > On Thu, Sep 26, 2019 at 09:14:39PM +0800, Tiwei Bie wrote: > > > 4. Does device need to limit max ring size? > > > 5. Does device need to limit max number of queues? > > > > I think so. It's helpful to have ioctls to report the max > > ring size and max number of queues. > > Also, let's not repeat the vhost net mistakes, let's lock > everything to the order required by the virtio spec, > checking status bits at each step. > E.g.: > set backend features > set features > detect and program vqs > enable vqs > enable driver > > and check status at each step to force the correct order. > e.g. don't allow enabling vqs after driver ok, etc Got it. Thanks a lot! Regards, Tiwei > > -- > MST
