Re: [PATCH net-next 0/3] support changing steering policies in tuntap

[Jason Wang]

On 2017å09æ28æ 13:02, Tom Herbert wrote:
> On Wed, Sep 27, 2017 at 4:25 PM, Willem de Bruijn
> <willemdebruijn.kernel@xxxxxxxxx> wrote:
> > > > In the future, both simple and sophisticated policy like RSS or other guest
> > > > driven steering policies could be done on top.
> > > IMHO there should be a more practical example before adding all this
> > > indirection. And it would be nice to understand why this queue selection
> > > needs to be tun specific.
> > I was thinking the same and this reminds me of the various strategies
> > implemented in packet fanout. tun_cpu_select_queue is analogous to
> > fanout_demux_cpu though it is tun-specific in that it requires tun->numqueues.
> >
> > Fanout accrued various strategies until it gained an eBPF variant. Just
> > supporting BPF is probably sufficient here, too.
> +1, in addition to packet fanout, we have SO_REUSEPORT with BPF, RPS,
> RFS, etc. It would be nice if existing packet steering mechanisms
> could be leveraged for tun.

This could be done by using the API introduced in this series, I can try 
this in V2.

Thanks