tree 945a72f636ced1b443d894495704237e4cb7816d
parent 6a302358d87fedaf7bda12b8e909265ebf1ce674
author Stephen Hemminger <shemminger@linux-foundation.org> 1185432574 -0700
committer David S. Miller <davem@sunset.davemloft.net> 1185874077 -0700

[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 <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>