diff options
| author | Eric Dumazet <edumazet@google.com> | 2020-04-30 10:35:43 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-04-30 13:24:01 -0700 |
| commit | a70437cc09a11771870e9f6bfc0ba1237161daa8 (patch) | |
| tree | 2160cfb6274072fcc4350afbbd5aa7ebf1580a4c /net/ipv4/tcp_input.c | |
| parent | ccd0628fca440268711560a1dbacc727b4f9e214 (diff) | |
| download | linux-a70437cc09a11771870e9f6bfc0ba1237161daa8.tar.gz | |
tcp: add hrtimer slack to sack compression
Add a sysctl to control hrtimer slack, default of 100 usec.
This gives the opportunity to reduce system overhead,
and help very short RTT flows.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_input.c')
| -rw-r--r-- | net/ipv4/tcp_input.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index ef921ecba4155..d68128a672ab0 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -5324,8 +5324,9 @@ send_now: 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), - HRTIMER_MODE_REL_PINNED_SOFT); + hrtimer_start_range_ns(&tp->compressed_ack_timer, ns_to_ktime(delay), + sock_net(sk)->ipv4.sysctl_tcp_comp_sack_slack_ns, + HRTIMER_MODE_REL_PINNED_SOFT); } static inline void tcp_ack_snd_check(struct sock *sk) |