commit a6af2d6ba5797c556fba0cd3a19e5f3bc9a99b76
author Doug Leith <doug.leith@nuim.ie> Thu Dec 04 17:17:18 2008 -0800
committer David S. Miller <davem@davemloft.net> Thu Dec 04 17:17:18 2008 -0800
tree dd2a3be62a935df9c8f8d0a0845ddd310d774f6c
parent f706644d55f90e8306d87060168fef33804d6dd9

tcp: tcp_vegas ssthresh bug fix

This patch fixes a bug in tcp_vegas.c.  At the moment this code leaves
ssthresh untouched.  However, this means that the vegas congestion
control algorithm is effectively unable to reduce cwnd below the
ssthresh value (if the vegas update lowers the cwnd below ssthresh,
then slow start is activated to raise it back up).  One example where
this matters is when during slow start cwnd overshoots the link
capacity and a flow then exits slow start with ssthresh set to a value
above where congestion avoidance would like to adjust it.

Signed-off-by: Doug Leith <doug.leith@nuim.ie>
Signed-off-by: David S. Miller <davem@davemloft.net>