[TCP]: Add Scalable TCP congestion control module.

This patch implements Tom Kelly's Scalable TCP congestion control algorithm
for the modular framework.

The algorithm has some nice scaling properties, and has been used a fair bit
in research, though is known to have significant fairness issues, so it's not
really suitable for general purpose use.

Signed-off-by: John Heffner <jheffner@psc.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig
index 73a25b5..690e88b 100644 (file)
--- a/net/ipv4/Kconfig
+++ b/net/ipv4/Kconfig
@@ -511,6 +511,15 @@ config TCP_CONG_VEGAS
        window. TCP Vegas should provide less packet loss, but it is
        not as aggressive as TCP Reno.
 
+config TCP_CONG_SCALABLE
+       tristate "Scalable TCP"
+       depends on INET && EXPERIMENTAL
+       default n
+       ---help---
+       Scalable TCP is a sender-side only change to TCP which uses a
+       MIMD congestion control algorithm which has some nice scaling
+       properties, though is known to have fairness issues.
+       See http://www-lce.eng.cam.ac.uk/~ctk21/scalable/
 
 endmenu
 

diff --git a/net/ipv4/Makefile b/net/ipv4/Makefile
index e96ed17..5718cdb 100644 (file)
--- a/net/ipv4/Makefile
+++ b/net/ipv4/Makefile
@@ -37,6 +37,7 @@ obj-$(CONFIG_TCP_CONG_HSTCP) += tcp_highspeed.o
 obj-$(CONFIG_TCP_CONG_HYBLA) += tcp_hybla.o
 obj-$(CONFIG_TCP_CONG_HTCP) += tcp_htcp.o
 obj-$(CONFIG_TCP_CONG_VEGAS) += tcp_vegas.o
+obj-$(CONFIG_TCP_CONG_SCALABLE) += tcp_scalable.o
 
 obj-$(CONFIG_XFRM) += xfrm4_policy.o xfrm4_state.o xfrm4_input.o \
                      xfrm4_output.o

diff --cc net/ipv4/tcp_scalable.c
Simple merge