Re: [virtio-dev] Re: [Qemu-devel] [PATCH] qemu: Introduce VIRTIO_NET_F_STANDBY feature bit to virtio_net

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On Fri, 22 Jun 2018 17:05:04 -0700
Siwei Liu <loseweigh@xxxxxxxxx> wrote:

> On Fri, Jun 22, 2018 at 3:33 PM, Michael S. Tsirkin <mst@xxxxxxxxxx> wrote:
> > I suspect the diveregence will be lost on most users though
> > simply because they don't even care about vfio. They just
> > want things to go fast.  
> 
> Like Jason said, VF isn't faster than virtio-net in all cases. It
> depends on the workload and performance metrics: throughput, latency,
> or packet per second.

So, will it be guest/admin-controllable then where the traffic flows
through? Just because we do have a vf available after negotiation of
the feature bit, it does not necessarily mean we want to use it? Do we
(the guest) even want to make it visible in that case?
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