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tcp: Allow send-limited cwnd to grow up to max_burst when gso disabled

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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: John Heffner <johnwheffner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
John Heffner 2008-04-29 03:13:02 -07:00 committed by David S. Miller
parent d031358754
commit ce447eb914
1 changed files with 4 additions and 7 deletions
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9
net/ipv4/tcp_cong.c
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@ -285,13 +285,10 @@ int tcp_is_cwnd_limited(const struct sock *sk, u32 in_flight)
if (in_flight >= tp->snd_cwnd)
return 1;
if (!sk_can_gso(sk))
return 0;
left = tp->snd_cwnd - in_flight;
if (sysctl_tcp_tso_win_divisor)
return left * sysctl_tcp_tso_win_divisor < tp->snd_cwnd;
else
if (sk_can_gso(sk) &&
left * sysctl_tcp_tso_win_divisor < tp->snd_cwnd)
return 1;
return left <= tcp_max_burst(tp);
}
EXPORT_SYMBOL_GPL(tcp_is_cwnd_limited);