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veth: reduce stat overhead
authorEric Dumazet <edumazet@google.com>
Sat, 29 Dec 2012 16:02:43 +0000 (16:02 +0000)
committerDavid S. Miller <davem@davemloft.net>
Sun, 30 Dec 2012 10:31:58 +0000 (02:31 -0800)
veth stats are a bit bloated. There is no need to account transmit
and receive stats, since they are absolutely symmetric.

Also use a per device atomic64_t for the dropped counter, as it
should never be used in fast path.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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