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authorStephen Hemminger <shemminger@osdl.org>2005-11-10 17:07:24 -0800
committerDavid S. Miller <davem@davemloft.net>2005-11-10 17:07:24 -0800
commit7faffa1c7fb9b8e8917e3225d4e2638270c0a48b (patch)
tree3c9f998639bc2374a86b1f2251ae421e625c1e9d /net/ipv4/tcp_htcp.c
parent2d2abbab63f6726a147ae61ada39bf2c9ee0db9a (diff)
[TCP]: add tcp_slow_start helper
Move all the code that does linear TCP slowstart to one inline function to ease later patch to add ABC support. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_htcp.c')
-rw-r--r--net/ipv4/tcp_htcp.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/net/ipv4/tcp_htcp.c b/net/ipv4/tcp_htcp.c
index 404a326ba345..3284cfb993e6 100644
--- a/net/ipv4/tcp_htcp.c
+++ b/net/ipv4/tcp_htcp.c
@@ -210,11 +210,10 @@ static void htcp_cong_avoid(struct sock *sk, u32 ack, u32 rtt,
if (!tcp_is_cwnd_limited(sk, in_flight))
return;
- if (tp->snd_cwnd <= tp->snd_ssthresh) {
- /* In "safe" area, increase. */
- if (tp->snd_cwnd < tp->snd_cwnd_clamp)
- tp->snd_cwnd++;
- } else {
+ if (tp->snd_cwnd <= tp->snd_ssthresh)
+ tcp_slow_start(tp);
+ else {
+
measure_rtt(sk);
/* keep track of number of round-trip times since last backoff event */
@@ -224,7 +223,7 @@ static void htcp_cong_avoid(struct sock *sk, u32 ack, u32 rtt,
htcp_alpha_update(ca);
}
- /* In dangerous area, increase slowly.
+ /* In dangerous area, increase slowly.
* In theory this is tp->snd_cwnd += alpha / tp->snd_cwnd
*/
if ((tp->snd_cwnd_cnt++ * ca->alpha)>>7 >= tp->snd_cwnd) {