Commit 246eb2af authored by John Heffner's avatar John Heffner Committed by David S. Miller
Browse files

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: default avatarJohn Heffner <johnwheffner@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ce447eb9

net/ipv4/tcp_cong.c

+2 −1
Original line number Diff line number Diff line
@@ -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);

}