Merge branch 'XDP-transmission-for-tuntap'

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Jason Wang says:

====================
XDP transmission for tuntap

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
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

David S. Miller 2018-01-09 10:57:19 -05:00

parent a0ce093180 fc72d1d54d

commit e8b18af8c3

5 changed files with 269 additions and 90 deletions

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41

drivers/net/tap.c

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239

drivers/net/tun.c

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52

drivers/vhost/net.c

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6

include/linux/if_tap.h

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21

include/linux/if_tun.h

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