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| author | Eric Dumazet <edumazet@google.com> | 2018-10-15 09:37:58 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-10-15 22:56:42 -0700 |
| commit | 825e1c523d5000f067a1614e4a66bb282a2d373c (patch) | |
| tree | 0e00bed799a56fb60c399ae94816018a0213e476 | |
| parent | 97ec3eb33dd300764ca5fa8923e5430dc4dbac13 (diff) | |
| download | linux-825e1c523d5000f067a1614e4a66bb282a2d373c.tar.bz2 | |
tcp: cdg: use tcp high resolution clock cache
We store in tcp socket a cache of most recent high resolution
clock, there is no need to call local_clock() again, since
this cache is good enough.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv4/tcp_cdg.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_cdg.c b/net/ipv4/tcp_cdg.c index 06fbe102a425..37eebd910396 100644 --- a/net/ipv4/tcp_cdg.c +++ b/net/ipv4/tcp_cdg.c @@ -146,7 +146,7 @@ static void tcp_cdg_hystart_update(struct sock *sk) return; if (hystart_detect & HYSTART_ACK_TRAIN) { - u32 now_us = div_u64(local_clock(), NSEC_PER_USEC); + u32 now_us = tp->tcp_mstamp; if (ca->last_ack == 0 || !tcp_is_cwnd_limited(sk)) { ca->last_ack = now_us; |