linux-kernel - [PATCH net-next V2 0/2] XDP transmission for tuntap

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Date:   Thu,  4 Jan 2018 11:14:26 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     mst@...hat.com, jbrouer@...hat.com,
        Jason Wang <jasowang@...hat.com>
Subject: [PATCH net-next V2 0/2] XDP transmission for tuntap

Hi all:

This series tries to implement XDP transmission (ndo_xdp_xmit) for
tuntap. Pointer ring was used for queuing both XDP buffers and
sk_buff, this is done by encoding the type into lowest bit of the
pointer and storin XDP metadata in the headroom of XDP buff.

Tests gets 3.05 Mpps when doing xdp_redirect_map from ixgbe to VM
(testpmd + virtio-net in guest). This gives us ~20% improvments
compared to use skb during redirect.

Please review.

Changes from V1:

- slient warnings
- fix typos
- add skb mode number in the commit log

Jason Wang (2):
  tun/tap: use ptr_ring instead of skb_array
  tuntap: XDP transmission

 drivers/net/tap.c      |  41 ++++-----
 drivers/net/tun.c      | 239 +++++++++++++++++++++++++++++++++++++++----------
 drivers/vhost/net.c    |  52 ++++++-----
 include/linux/if_tap.h |   6 +-
 include/linux/if_tun.h |  21 ++++-
 5 files changed, 269 insertions(+), 90 deletions(-)

-- 
2.7.4