diff options
| author | Wei Wang <weiwan@google.com> | 2019-01-25 19:53:19 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-01-27 22:29:43 +0100 |
| commit | 31954cd8bb667030b1c0d3d77f28fe71f06999f9 (patch) | |
| tree | f00b43f2669ac70db625d8babe06e89cd0a731e2 /net/dccp | |
| parent | net: ipv4: ip_input: fix blank line coding style issues (diff) | |
| download | linux-31954cd8bb667030b1c0d3d77f28fe71f06999f9.tar.xz linux-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/dccp')
| -rw-r--r-- | net/dccp/input.c | 2 | ||||
| -rw-r--r-- | net/dccp/timer.c | 4 |
2 files changed, 3 insertions, 3 deletions
diff --git a/net/dccp/input.c b/net/dccp/input.c index 85d6c879383d..8d03707abdac 100644 --- a/net/dccp/input.c +++ b/net/dccp/input.c @@ -480,7 +480,7 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk, sk_wake_async(sk, SOCK_WAKE_IO, POLL_OUT); } - if (sk->sk_write_pending || icsk->icsk_ack.pingpong || + if (sk->sk_write_pending || inet_csk_in_pingpong_mode(sk) || icsk->icsk_accept_queue.rskq_defer_accept) { /* Save one ACK. Data will be ready after * several ticks, if write_pending is set. diff --git a/net/dccp/timer.c b/net/dccp/timer.c index 1501a20a94ca..74e138495d67 100644 --- a/net/dccp/timer.c +++ b/net/dccp/timer.c @@ -199,7 +199,7 @@ static void dccp_delack_timer(struct timer_list *t) icsk->icsk_ack.pending &= ~ICSK_ACK_TIMER; if (inet_csk_ack_scheduled(sk)) { - if (!icsk->icsk_ack.pingpong) { + if (!inet_csk_in_pingpong_mode(sk)) { /* Delayed ACK missed: inflate ATO. */ icsk->icsk_ack.ato = min(icsk->icsk_ack.ato << 1, icsk->icsk_rto); @@ -207,7 +207,7 @@ static void dccp_delack_timer(struct timer_list *t) /* Delayed ACK missed: leave pingpong mode and * deflate ATO. */ - icsk->icsk_ack.pingpong = 0; + inet_csk_exit_pingpong_mode(sk); icsk->icsk_ack.ato = TCP_ATO_MIN; } dccp_send_ack(sk); |