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| author | David S. Miller <[email protected]> | 2023-10-23 08:35:02 +0000 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2023-10-23 08:35:02 +0000 |
| commit | bdf24b4bdfa59b124f9d0ff837f8d35a908da3b8 (patch) | |
| tree | be82eb8c966ea4a7efa7cd6ed0df9d8968ed9f5d /net/ipv4/tcp_lp.c | |
| parent | Merge branch 'consolidate-udp-ipv6-route-lookups' (diff) | |
| parent | tcp: add TCPI_OPT_USEC_TS (diff) | |
| download | kernel-bdf24b4bdfa59b124f9d0ff837f8d35a908da3b8.tar.gz kernel-bdf24b4bdfa59b124f9d0ff837f8d35a908da3b8.zip | |
Merge branch 'tcp-ts-usec-resolution'
Eric Dumazet says:
====================
tcp: add optional usec resolution to TCP TS
As discussed in various public places in 2016, Google adopted
usec resolution in RFC 7323 TS values, at Van Jacobson suggestion.
Goals were :
1) better observability of delays in networking stacks/fabrics.
2) better disambiguation of events based on TSval/ecr values.
3) building block for congestion control modules needing usec resolution.
Back then we implemented a schem based on private SYN options
to safely negotiate the feature.
For upstream submission, we chose to use a much simpler route
attribute because this feature is probably going to be used
in private networks.
ip route add 10/8 ... features tcp_usec_ts
References:
https://www.ietf.org/proceedings/97/slides/slides-97-tcpm-tcp-options-for-low-latency-00.pdf
https://datatracker.ietf.org/doc/draft-wang-tcpm-low-latency-opt/
First two patches are fixing old minor bugs and might be taken
by stable teams (thanks to appropriate Fixes: tags)
====================
Acked-by: Neal Cardwell <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'net/ipv4/tcp_lp.c')
| -rw-r--r-- | net/ipv4/tcp_lp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_lp.c b/net/ipv4/tcp_lp.c index ae36780977d2..52fe17167460 100644 --- a/net/ipv4/tcp_lp.c +++ b/net/ipv4/tcp_lp.c @@ -272,7 +272,7 @@ static void tcp_lp_pkts_acked(struct sock *sk, const struct ack_sample *sample) { struct tcp_sock *tp = tcp_sk(sk); struct lp *lp = inet_csk_ca(sk); - u32 now = tcp_time_stamp(tp); + u32 now = tcp_time_stamp_ts(tp); u32 delta; if (sample->rtt_us > 0) |