diff options
| author | Neal Cardwell <ncardwell@google.com> | 2011-11-16 08:58:05 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-11-27 18:54:09 -0500 |
| commit | 8cd6d6162d998da579d40a1ee061bf8ce1610ff8 (patch) | |
| tree | c57f017e0f0f4b0a12760918f999d411a6027c63 | |
| parent | f698204bd0bfdc645642e271da117b56b795aee0 (diff) | |
tcp: skip cwnd moderation in TCP_CA_Open in tcp_try_to_open
The problem: Senders were overriding cwnd values picked during an undo
by calling tcp_moderate_cwnd() in tcp_try_to_open().
The fix: Don't moderate cwnd in tcp_try_to_open() if we're in
TCP_CA_Open, since doing so is generally unnecessary and specifically
would override a DSACK-based undo of a cwnd reduction made in fast
recovery.
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv4/tcp_input.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index a4efdd7cf5a1..78dd38cd5496 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -2881,7 +2881,8 @@ static void tcp_try_to_open(struct sock *sk, int flag) if (inet_csk(sk)->icsk_ca_state != TCP_CA_CWR) { tcp_try_keep_open(sk); - tcp_moderate_cwnd(tp); + if (inet_csk(sk)->icsk_ca_state != TCP_CA_Open) + tcp_moderate_cwnd(tp); } else { tcp_cwnd_down(sk, flag); } |