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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 <johnwheffner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
John Heffner 2008-04-29 03:13:52 -07:00 committed by David S. Miller
parent ce447eb914
commit 246eb2af06
1 changed files with 2 additions and 1 deletions
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3
net/ipv4/tcp_cong.c
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@ -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);
}