From: Thomas Graf <tgraf@redhat.com>
Date: Fri, 23 Jul 2010 15:36:00 -0400
Subject: [net] tcp: increase Vegas default alpha and beta params
Message-id: <20100723153600.GL14925@lsx.localdomain>
Patchwork-id: 27070
O-Subject: [RHEL5.6 PATCH 10/14] tcp: Increase Vegas default alpha to 2 and
	beta to 4.
Bugzilla: 612709
RH-Acked-by: Neil Horman <nhorman@redhat.com>
RH-Acked-by: David S. Miller <davem@redhat.com>

commit d2e4bdc8704b0e711c5046a430bfd1681b0bd5a9
Author: David S. Miller <davem@sunset.davemloft.net>
Date:   Tue Nov 28 14:37:38 2006 -0800

    [TCP] Vegas: Increase default alpha to 2 and beta to 4.

    This helps Vegas cope better with delayed ACKs, see
    analysis at:

    http://www.cs.caltech.edu/%7Eweixl/technical/ns2linux/known_linux/index.html#vegas

    Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Jarod Wilson <jarod@redhat.com>

diff --git a/net/ipv4/tcp_vegas.c b/net/ipv4/tcp_vegas.c
index 490360b..2caa10a 100644
--- a/net/ipv4/tcp_vegas.c
+++ b/net/ipv4/tcp_vegas.c
@@ -42,8 +42,8 @@
  * with V_PARAM_SHIFT bits to the right of the binary point.
  */
 #define V_PARAM_SHIFT 1
-static int alpha = 1<<V_PARAM_SHIFT;
-static int beta  = 3<<V_PARAM_SHIFT;
+static int alpha = 2<<V_PARAM_SHIFT;
+static int beta  = 4<<V_PARAM_SHIFT;
 static int gamma = 1<<V_PARAM_SHIFT;
 
 module_param(alpha, int, 0644);