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Commit ce447eb9 authored by John Heffner's avatar John Heffner Committed by David S. Miller
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tcp: Allow send-limited cwnd to grow up to max_burst when gso disabled 



This changes the logic in tcp_is_cwnd_limited() so that cwnd may grow
up to tcp_max_burst() even when sk_can_gso() is false, or when
sysctl_tcp_tso_win_divisor != 0.

Signed-off-by: default avatarJohn Heffner <johnwheffner@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d0313587

net/ipv4/tcp_cong.c

+4 −7
Original line number Original line Diff line number Diff line
@@ -285,13 +285,10 @@ int tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight) 
	if (in_flight >= tp->snd_cwnd)

	if (in_flight >= tp->snd_cwnd)

		return 1;

		return 1;





	if (!sk_can_gso(sk))

		return 0;



	left = tp->snd_cwnd - in_flight;

	left = tp->snd_cwnd - in_flight;

	if (sysctl_tcp_tso_win_divisor)

	if (sk_can_gso(sk) &&

		return left * sysctl_tcp_tso_win_divisor < tp->snd_cwnd;

	    left * sysctl_tcp_tso_win_divisor < tp->snd_cwnd)

	else

		return 1;

	return left <= tcp_max_burst(tp);

	return left <= tcp_max_burst(tp);

}

}

EXPORT_SYMBOL_GPL(tcp_is_cwnd_limited);

EXPORT_SYMBOL_GPL(tcp_is_cwnd_limited);