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authorIlpo Järvinen <ilpo.jarvinen@helsinki.fi>2007-10-12 04:32:31 +0400
committerDavid S. Miller <davem@davemloft.net>2007-10-12 04:32:31 +0400
commit16e906812f885cf16d95577dba260db6375ba571 (patch)
treeaddc7dc23792f74d2b5105197e51aa88cbe6a0fb /net
parent4953f0fcc06a125f87874743d968c0e185c8b296 (diff)
downloadlinux-16e906812f885cf16d95577dba260db6375ba571.tar.xz
[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.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 101054cb13e9..e40857e073b3 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);
}