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Date:   Wed, 26 Oct 2016 15:52:02 +0200
From:   Jesper Dangaard Brouer <>
To:     Shrijeet Mukherjee <>
Subject: Re: [PATCH net-next RFC WIP] Patch for XDP support for virtio_net

On Sat, 22 Oct 2016 04:07:23 +0000
Shrijeet Mukherjee <> wrote:

> This patch adds support for xdp ndo and also inserts the xdp program
> call into the merged RX buffers and big buffers paths

I really appreciate you are doing this for virtio_net.

My first question is: Is the (packet) page data writable?
(MST might be able to answer?)

As this is currently an XDP requirement[1].  

> * The small packet skb receive is skipped for now
> * No TX for now

I do see more and more valid use-cases for only implementing XDP_DROP
and not necessarily also implementing XDP_TX.  This does requires that
we implement some kind of feature/capabilities negotiation mechanism[2].



Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Principal Kernel Engineer at Red Hat
  Author of

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