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| author | Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> | 2007-10-11 17:32:31 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2007-10-11 17:32:31 -0700 |
| commit | 16e906812f885cf16d95577dba260db6375ba571 (patch) | |
| tree | addc7dc23792f74d2b5105197e51aa88cbe6a0fb /net | |
| parent | 4953f0fcc06a125f87874743d968c0e185c8b296 (diff) | |
| download | linux-3.10-16e906812f885cf16d95577dba260db6375ba571.tar.gz linux-3.10-16e906812f885cf16d95577dba260db6375ba571.tar.bz2 linux-3.10-16e906812f885cf16d95577dba260db6375ba571.zip | |
[TCP]: Add bytes_acked (ABC) clearing to FRTO too
I was reading tcp_enter_loss while looking for Cedric's bug and
noticed bytes_acked adjustment is missing from FRTO side.
Since bytes_acked will only be used in tcp_cong_avoid, I think
it's safe to assume RTO would be spurious. During FRTO cwnd
will be not controlled by tcp_cong_avoid and if FRTO calls for
conventional recovery, cwnd is adjusted and the result of wrong
assumption is cleared from bytes_acked. If RTO was in fact
spurious, we did normal ABC already and can continue without
any additional adjustments.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/tcp_input.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 101054cb13e..e40857e073b 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -1687,6 +1687,7 @@ static void tcp_enter_frto_loss(struct sock *sk, int allowed_segments, int flag) tp->snd_cwnd_cnt = 0; tp->snd_cwnd_stamp = tcp_time_stamp; tp->frto_counter = 0; + tp->bytes_acked = 0; tp->reordering = min_t(unsigned int, tp->reordering, sysctl_tcp_reordering); @@ -2824,6 +2825,7 @@ static void tcp_conservative_spur_to_response(struct tcp_sock *tp) { tp->snd_cwnd = min(tp->snd_cwnd, tp->snd_ssthresh); tp->snd_cwnd_cnt = 0; + tp->bytes_acked = 0; TCP_ECN_queue_cwr(tp); tcp_moderate_cwnd(tp); } |