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

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
...@@ -287,7 +287,8 @@ int tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight) ...@@ -287,7 +287,8 @@ int tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight)
left = tp->snd_cwnd - in_flight; left = tp->snd_cwnd - in_flight;
if (sk_can_gso(sk) && 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 1;
return left <= tcp_max_burst(tp); return left <= tcp_max_burst(tp);
} }
......
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