Commit 15d33c07 authored Apr 09, 2007 by David S. Miller

[TCP]: slow_start_after_idle should influence cwnd validation too



For the cases that slow_start_after_idle are meant to deal
with, it is almost a certainty that the congestion window
tests will think the connection is application limited and
we'll thus decrease the cwnd there too.  This defeats the
whole point of setting slow_start_after_idle to zero.

So test it there too.

We do not cancel out the entire tcp_cwnd_validate() function
so that if the sysctl is changed we still have the validation
state maintained.

Signed-off-by: David S. Miller <davem@davemloft.net>

parent 699784b7

net/ipv4/tcp_output.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -943,7 +943,8 @@ static void tcp_cwnd_validate(struct sock sk, struct tcp_sock tp)
		if (tp->packets_out > tp->snd_cwnd_used)
		tp->snd_cwnd_used = tp->packets_out;

		if ((s32)(tcp_time_stamp - tp->snd_cwnd_stamp) >= inet_csk(sk)->icsk_rto)
		if (sysctl_tcp_slow_start_after_idle &&
		(s32)(tcp_time_stamp - tp->snd_cwnd_stamp) >= inet_csk(sk)->icsk_rto)
		tcp_cwnd_application_limited(sk);
		}
		}

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