From: Sangtae Ha <sangtae.ha@gmail.com>
Date: Mon, 14 Mar 2011 07:52:18 +0000 (+0000)
Subject: tcp_cubic: fix low utilization of CUBIC with HyStart
X-Git-Tag: v2.6.39-rc1~468^2~19^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b5ccd07337489fa9c9d32e0b628a2168b7953adf;p=pandora-kernel.git

tcp_cubic: fix low utilization of CUBIC with HyStart

HyStart sets the initial exit point of slow start.
Suppose that HyStart exits at 0.5BDP in a BDP network and no history exists.
If the BDP of a network is large, CUBIC's initial cwnd growth may be
too conservative to utilize the link.
CUBIC increases the cwnd 20% per RTT in this case.

Signed-off-by: Sangtae Ha <sangtae.ha@gmail.com>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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