tuntap: free XDP dropped packets in a batch

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Thanks to the batched XDP buffs through msg_control. Instead of
calling put_page() for each page which involves a atomic operation,
let's batch them by record the last page that needs to be freed and
its refcnt count and free them in a batch.

Testpmd(virtio-user + vhost_net) + XDP_DROP shows 3.8% improvement.

Before: 4.71Mpps
After : 4.89Mpps

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Jason Wang 2018-11-15 17:43:10 +08:00 • committed by David S. Miller

parent e4dab1e6ea

commit f9e06c45cb

1 changed files with 26 additions and 3 deletions

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29

drivers/net/tun.c

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