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| author | David S. Miller <davem@davemloft.net> | 2005-07-05 15:17:45 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2005-07-05 15:17:45 -0700 |
| commit | fc6415bcb0f58f03adb910e56d7e1df6368794e0 (patch) | |
| tree | 71c326c1176e87c57c80cb32d9049b813f58bced /include | |
| parent | c65f7f00c587828e3d50737805a78f74804972de (diff) | |
| download | op-kernel-dev-fc6415bcb0f58f03adb910e56d7e1df6368794e0.zip op-kernel-dev-fc6415bcb0f58f03adb910e56d7e1df6368794e0.tar.gz | |
[TCP]: Fix quick-ack decrementing with TSO.
On each packet output, we call tcp_dec_quickack_mode()
if the ACK flag is set. It drops tp->ack.quick until
it hits zero, at which time we deflate the ATO value.
When doing TSO, we are emitting multiple packets with
ACK set, so we should decrement tp->ack.quick that many
segments.
Note that, unlike this case, tcp_enter_cwr() should not
take the tcp_skb_pcount(skb) into consideration. That
function, one time, readjusts tp->snd_cwnd and moves
into TCP_CA_CWR state.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/tcp.h | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h index ec9e20c..afe41c5 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -721,11 +721,16 @@ static inline int tcp_ack_scheduled(struct tcp_sock *tp) return tp->ack.pending&TCP_ACK_SCHED; } -static __inline__ void tcp_dec_quickack_mode(struct tcp_sock *tp) +static __inline__ void tcp_dec_quickack_mode(struct tcp_sock *tp, unsigned int pkts) { - if (tp->ack.quick && --tp->ack.quick == 0) { - /* Leaving quickack mode we deflate ATO. */ - tp->ack.ato = TCP_ATO_MIN; + if (tp->ack.quick) { + if (pkts >= tp->ack.quick) { + tp->ack.quick = 0; + + /* Leaving quickack mode we deflate ATO. */ + tp->ack.ato = TCP_ATO_MIN; + } else + tp->ack.quick -= pkts; } } |
