diff options
| author | Eric Dumazet <edumazet@google.com> | 2012-04-16 23:28:07 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-04-17 22:32:00 -0400 |
| commit | 4d846f02392a710f9604892ac3329e628e60a230 (patch) | |
| tree | 8c8a8cd663914e546b324d0657fdfad2c8becdee | |
| parent | 48159f009f5f92ef5962e7c278ac615d74242fa5 (diff) | |
| download | xen-4d846f02392a710f9604892ac3329e628e60a230.tar.gz | |
tcp: fix tcp_grow_window() for large incoming frames
tcp_grow_window() has to grow rcv_ssthresh up to window_clamp, allowing
sender to increase its window.
tcp_grow_window() still assumes a tcp frame is under MSS, but its no
longer true with LRO/GRO.
This patch fixes one of the performance issue we noticed with GRO on.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Cc: Tom Herbert <therbert@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv4/tcp_input.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 9944c1d9a2180..3ff3640653762 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -335,6 +335,7 @@ static void tcp_grow_window(struct sock *sk, const struct sk_buff *skb) incr = __tcp_grow_window(sk, skb); if (incr) { + incr = max_t(int, incr, 2 * skb->len); tp->rcv_ssthresh = min(tp->rcv_ssthresh + incr, tp->window_clamp); inet_csk(sk)->icsk_ack.quick |= 1; |