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authorIlpo Järvinen <ilpo.jarvinen@helsinki.fi>2007-02-27 10:09:49 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-25 22:23:23 -0700
commit3cfe3baaf07c9e40a75f9a70662de56df1c246a8 (patch)
tree989b2aff491b5df3aa0215f611a8c7f1360c67e9 /net/ipv4/sysctl_net_ipv4.c
parentc5e7af0df5d7234afd8596560d9f570cfc6c18bf (diff)
[TCP]: Add two new spurious RTO responses to FRTO
New sysctl tcp_frto_response is added to select amongst these responses: - Rate halving based; reuses CA_CWR state (default) - Very conservative; used to be the only one available (=1) - Undo cwr; undoes ssthresh and cwnd reductions (=2) The response with rate halving requires a new parameter to tcp_enter_cwr because FRTO has already reduced ssthresh and doing a second reduction there has to be prevented. In addition, to keep things nice on 80 cols screen, a local variable was added. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> 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.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index d68effe98e8..6817d6485df 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -647,6 +647,14 @@ ctl_table ipv4_table[] = {
.proc_handler = &proc_dointvec
},
{
+ .ctl_name = NET_TCP_FRTO_RESPONSE,
+ .procname = "tcp_frto_response",
+ .data = &sysctl_tcp_frto_response,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
.ctl_name = NET_TCP_LOW_LATENCY,
.procname = "tcp_low_latency",
.data = &sysctl_tcp_low_latency,