bridge: per-cpu packet statistics (v3)

The shared packet statistics are a potential source of slow down
on bridged traffic. Convert to per-cpu array, but only keep those
statistics which change per-packet.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 2 deletions

diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index d74d570fc848..333dfb7c5886 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -23,9 +23,11 @@ const u8 br_group_address[ETH_ALEN] = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 };
 static int br_pass_frame_up(struct sk_buff *skb)
 {
         struct net_device *indev, *brdev = BR_INPUT_SKB_CB(skb)->brdev;
+        struct net_bridge *br = netdev_priv(brdev);
+        struct br_cpu_netstats *brstats = this_cpu_ptr(br->stats);
 
-        brdev->stats.rx_packets++;
-        brdev->stats.rx_bytes += skb->len;
+        brstats->rx_packets++;
+        brstats->rx_bytes += skb->len;
 
         indev = skb->dev;
         skb->dev = brdev;