tcp: Remove TCPCT
authorChristoph Paasch <christoph.paasch@uclouvain.be>
Sun, 17 Mar 2013 08:23:34 +0000 (08:23 +0000)
committerDavid S. Miller <davem@davemloft.net>
Sun, 17 Mar 2013 18:35:13 +0000 (14:35 -0400)
commit1a2c6181c4a1922021b4d7df373bba612c3e5f04
tree1346c9b1db83495a98fbcf95f8e521c67fc55cb9
parent94d8f2b133c9ff97105adc1233d1a35e16e1e7a6
tcp: Remove TCPCT

TCPCT uses option-number 253, reserved for experimental use and should
not be used in production environments.
Further, TCPCT does not fully implement RFC 6013.

As a nice side-effect, removing TCPCT increases TCP's performance for
very short flows:

Doing an apache-benchmark with -c 100 -n 100000, sending HTTP-requests
for files of 1KB size.

before this patch:
average (among 7 runs) of 20845.5 Requests/Second
after:
average (among 7 runs) of 21403.6 Requests/Second

Signed-off-by: Christoph Paasch <christoph.paasch@uclouvain.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
18 files changed:
Documentation/networking/ip-sysctl.txt
drivers/infiniband/hw/cxgb4/cm.c
include/linux/tcp.h
include/net/request_sock.h
include/net/tcp.h
include/uapi/linux/tcp.h
net/dccp/ipv4.c
net/dccp/ipv6.c
net/ipv4/inet_connection_sock.c
net/ipv4/syncookies.c
net/ipv4/sysctl_net_ipv4.c
net/ipv4/tcp.c
net/ipv4/tcp_input.c
net/ipv4/tcp_ipv4.c
net/ipv4/tcp_minisocks.c
net/ipv4/tcp_output.c
net/ipv6/syncookies.c
net/ipv6/tcp_ipv6.c