From 30cfd0baf0a0c4329fff1ef4b622919297969ec8 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Wed, 25 Jul 2007 23:49:34 -0700 Subject: [TCP]: congestion control API pass RTT in microseconds This patch changes the API for the callback that is done after an ACK is received. It solves a couple of issues: * Some congestion controls want higher resolution value of RTT (controlled by TCP_CONG_RTT_SAMPLE flag). These don't really want a ktime, but all compute a RTT in microseconds. * Other congestion control could use RTT at jiffies resolution. To keep API consistent the units should be the same for both cases, just the resolution should change. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- net/ipv4/tcp_vegas.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'net/ipv4/tcp_vegas.c') diff --git a/net/ipv4/tcp_vegas.c b/net/ipv4/tcp_vegas.c index 914e030..b49dedc 100644 --- a/net/ipv4/tcp_vegas.c +++ b/net/ipv4/tcp_vegas.c @@ -112,16 +112,16 @@ EXPORT_SYMBOL_GPL(tcp_vegas_init); * o min-filter RTT samples from a much longer window (forever for now) * to find the propagation delay (baseRTT) */ -void tcp_vegas_pkts_acked(struct sock *sk, u32 cnt, ktime_t last) +void tcp_vegas_pkts_acked(struct sock *sk, u32 cnt, s32 rtt_us) { struct vegas *vegas = inet_csk_ca(sk); u32 vrtt; - if (ktime_equal(last, net_invalid_timestamp())) + if (rtt_us < 0) return; /* Never allow zero rtt or baseRTT */ - vrtt = ktime_to_us(net_timedelta(last)) + 1; + vrtt = rtt_us + 1; /* Filter to find propagation delay: */ if (vrtt < vegas->baseRTT) -- cgit v1.1