From 246eb2af060fc32650f07203c02bdc0456ad76c7 Mon Sep 17 00:00:00 2001 From: John Heffner Date: Tue, 29 Apr 2008 03:13:52 -0700 Subject: [PATCH] tcp: Limit cwnd growth when deferring for GSO This fixes inappropriately large cwnd growth on sender-limited flows when GSO is enabled, limiting cwnd growth to 64k. Signed-off-by: John Heffner Signed-off-by: David S. Miller --- net/ipv4/tcp_cong.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/ipv4/tcp_cong.c b/net/ipv4/tcp_cong.c index bfb1996bd99f..6a250828b767 100644 --- a/net/ipv4/tcp_cong.c +++ b/net/ipv4/tcp_cong.c @@ -287,7 +287,8 @@ int tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight) left = tp->snd_cwnd - in_flight; if (sk_can_gso(sk) && - left * sysctl_tcp_tso_win_divisor < tp->snd_cwnd) + left * sysctl_tcp_tso_win_divisor < tp->snd_cwnd && + left * tp->mss_cache < sk->sk_gso_max_size) return 1; return left <= tcp_max_burst(tp); }