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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2009-09-23 14:28:33 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-09-25 02:39:22 +0400 |
| commit | a43912ab1925788765208da5cd664b6f8e011d08 (patch) | |
| tree | 6f522dba1fd414b7da3999fa2da062d80a550874 /net/ipv4/ipip.c | |
| parent | edf42a27e8e242e543716663e54aa2b592ea070a (diff) | |
| download | linux-a43912ab1925788765208da5cd664b6f8e011d08.tar.xz | |
tunnel: eliminate recursion field
It seems recursion field from "struct ip_tunnel" is not anymore needed.
recursion prevention is done at the upper level (in dev_queue_xmit()),
since we use HARD_TX_LOCK protection for tunnels.
This avoids a cache line ping pong on "struct ip_tunnel" : This structure
should be now mostly read on xmit and receive paths.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ipip.c')
| -rw-r--r-- | net/ipv4/ipip.c | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c index 62548cb0923c..08ccd344de7a 100644 --- a/net/ipv4/ipip.c +++ b/net/ipv4/ipip.c @@ -402,11 +402,6 @@ static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) __be32 dst = tiph->daddr; int mtu; - if (tunnel->recursion++) { - stats->collisions++; - goto tx_error; - } - if (skb->protocol != htons(ETH_P_IP)) goto tx_error; @@ -485,7 +480,6 @@ static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) ip_rt_put(rt); stats->tx_dropped++; dev_kfree_skb(skb); - tunnel->recursion--; return NETDEV_TX_OK; } if (skb->sk) @@ -523,7 +517,6 @@ static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) nf_reset(skb); IPTUNNEL_XMIT(); - tunnel->recursion--; return NETDEV_TX_OK; tx_error_icmp: @@ -531,7 +524,6 @@ tx_error_icmp: tx_error: stats->tx_errors++; dev_kfree_skb(skb); - tunnel->recursion--; return NETDEV_TX_OK; } |