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authorAndreas Petlund <apetlund@simula.no>2010-02-18 02:47:01 +0000
committerDavid S. Miller <davem@davemloft.net>2010-02-18 15:43:08 -0800
commit36e31b0af58728071e8023cf8e20c5166b700717 (patch)
tree8b4d251bf78965ac7501bea9011786b8255a3312 /net/ipv4/sysctl_net_ipv4.c
parent5aa4b32fc86408705337e941ed716880c63d1590 (diff)
net: TCP thin linear timeouts
This patch will make TCP use only linear timeouts if the stream is thin. This will help to avoid the very high latencies that thin stream suffer because of exponential backoff. This mechanism is only active if enabled by iocontrol or syscontrol and the stream is identified as thin. A maximum of 6 linear timeouts is tried before exponential backoff is resumed. Signed-off-by: Andreas Petlund <apetlund@simula.no> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/sysctl_net_ipv4.c')
-rw-r--r--net/ipv4/sysctl_net_ipv4.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 7e3712ce399..e6a2460587d 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -576,6 +576,13 @@ static struct ctl_table ipv4_table[] = {
.proc_handler = proc_dointvec
},
{
+ .procname = "tcp_thin_linear_timeouts",
+ .data = &sysctl_tcp_thin_linear_timeouts,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec
+ },
+ {
.procname = "udp_mem",
.data = &sysctl_udp_mem,
.maxlen = sizeof(sysctl_udp_mem),