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| author | Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> | 2007-02-27 10:09:49 -0800 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-04-25 22:23:23 -0700 |
| commit | 3cfe3baaf07c9e40a75f9a70662de56df1c246a8 (patch) | |
| tree | 989b2aff491b5df3aa0215f611a8c7f1360c67e9 /net/ipv4/tcp_output.c | |
| parent | c5e7af0df5d7234afd8596560d9f570cfc6c18bf (diff) | |
| download | blackbird-op-linux-3cfe3baaf07c9e40a75f9a70662de56df1c246a8.tar.gz blackbird-op-linux-3cfe3baaf07c9e40a75f9a70662de56df1c246a8.zip | |
[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/tcp_output.c')
| -rw-r--r-- | net/ipv4/tcp_output.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index 3c24881f2a65..d19b2f3b70fd 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -545,7 +545,7 @@ static int tcp_transmit_skb(struct sock *sk, struct sk_buff *skb, int clone_it, if (likely(err <= 0)) return err; - tcp_enter_cwr(sk); + tcp_enter_cwr(sk, 1); return net_xmit_eval(err); |
