diff options
| author | Eric Dumazet <[email protected]> | 2018-05-17 21:47:28 +0000 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2018-05-18 15:40:27 +0000 |
| commit | 6d82aa242092d73c6d2e210cfaf0ebfbe6de1ccf (patch) | |
| tree | 5babdd50e69dd7ab9b6db82f3b665d9c80be6bad /net/ipv4/tcp_input.c | |
| parent | tcp: add TCPAckCompressed SNMP counter (diff) | |
| download | kernel-6d82aa242092d73c6d2e210cfaf0ebfbe6de1ccf.tar.gz kernel-6d82aa242092d73c6d2e210cfaf0ebfbe6de1ccf.zip | |
tcp: add tcp_comp_sack_delay_ns sysctl
This per netns sysctl allows for TCP SACK compression fine-tuning.
Its default value is 1,000,000, or 1 ms to meet TSO autosizing period.
Signed-off-by: Eric Dumazet <[email protected]>
Acked-by: Neal Cardwell <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'net/ipv4/tcp_input.c')
| -rw-r--r-- | net/ipv4/tcp_input.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index cc2ac5346b92..6a1dae38c955 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -5113,13 +5113,13 @@ send_now: if (hrtimer_is_queued(&tp->compressed_ack_timer)) return; - /* compress ack timer : 5 % of rtt, but no more than 1 ms */ + /* compress ack timer : 5 % of rtt, but no more than tcp_comp_sack_delay_ns */ rtt = tp->rcv_rtt_est.rtt_us; if (tp->srtt_us && tp->srtt_us < rtt) rtt = tp->srtt_us; - delay = min_t(unsigned long, NSEC_PER_MSEC, + delay = min_t(unsigned long, sock_net(sk)->ipv4.sysctl_tcp_comp_sack_delay_ns, rtt * (NSEC_PER_USEC >> 3)/20); sock_hold(sk); hrtimer_start(&tp->compressed_ack_timer, ns_to_ktime(delay), |