diff options
| author |   Wei Wang <weiwan@google.com> | 2019-01-25 10:53:19 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-01-27 13:29:43 -0800 |
| commit | 31954cd8bb667030b1c0d3d77f28fe71f06999f9 (patch) | |
| tree | f00b43f2669ac70db625d8babe06e89cd0a731e2 /net/ipv4/tcp_output.c | |
| parent | net: ipv4: ip_input: fix blank line coding style issues (diff) | |
| download | linux-dev-31954cd8bb667030b1c0d3d77f28fe71f06999f9.tar.xz linux-dev-31954cd8bb667030b1c0d3d77f28fe71f06999f9.zip | |
tcp: Refactor pingpong code
Instead of using pingpong as a single bit information, we refactor the
code to treat it as a counter. When interactive session is detected,
we set pingpong count to TCP_PINGPONG_THRESH. And when pingpong count
is >= TCP_PINGPONG_THRESH, we consider the session in pingpong mode.
This patch is a pure refactor and sets foundation for the next patch.
This patch itself does not change any pingpong logic.
Signed-off-by: Wei Wang <weiwan@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
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 | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index 26a2948dca95..06228e2d010e 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -171,7 +171,7 @@ static void tcp_event_data_sent(struct tcp_sock *tp, * packet, enter pingpong mode. */ if ((u32)(now - icsk->icsk_ack.lrcvtime) < icsk->icsk_ack.ato) - icsk->icsk_ack.pingpong = 1; + inet_csk_enter_pingpong_mode(sk); } /* Account for an ACK we sent. */ @@ -3569,7 +3569,7 @@ void tcp_send_delayed_ack(struct sock *sk) const struct tcp_sock *tp = tcp_sk(sk); int max_ato = HZ / 2; - if (icsk->icsk_ack.pingpong || + if (inet_csk_in_pingpong_mode(sk) || (icsk->icsk_ack.pending & ICSK_ACK_PUSHED)) max_ato = TCP_DELACK_MAX; |