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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_scalable.c
parent[TCP]: simplify microsecond rtt sampling (diff)
downloadlinux-dev-7faffa1c7fb9b8e8917e3225d4e2638270c0a48b.tar.xz
linux-dev-7faffa1c7fb9b8e8917e3225d4e2638270c0a48b.zip
[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_scalable.c')
-rw-r--r--net/ipv4/tcp_scalable.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/net/ipv4/tcp_scalable.c b/net/ipv4/tcp_scalable.c
index a2fd25617d24..26d7486ee501 100644
--- a/net/ipv4/tcp_scalable.c
+++ b/net/ipv4/tcp_scalable.c
@@ -24,17 +24,16 @@ static void tcp_scalable_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) {
- tp->snd_cwnd++;
- } else {
+ if (tp->snd_cwnd <= tp->snd_ssthresh)
+ tcp_slow_start(tp);
+ else {
tp->snd_cwnd_cnt++;
if (tp->snd_cwnd_cnt > min(tp->snd_cwnd, TCP_SCALABLE_AI_CNT)){
- tp->snd_cwnd++;
+ if (tp->snd_cwnd < tp->snd_cwnd_clamp)
+ tp->snd_cwnd++;
tp->snd_cwnd_cnt = 0;
}
}
- tp->snd_cwnd = min_t(u32, tp->snd_cwnd, tp->snd_cwnd_clamp);
- tp->snd_cwnd_stamp = tcp_time_stamp;
}
static u32 tcp_scalable_ssthresh(struct sock *sk)