netdev - Re: [PATCH net-next 09/15] tcp: use tcp_jiffies32 to feed probe

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Message-ID: <CACSApvanFXY+J1B7gP8wCsqJnnjM9jf2gKAXOxNVWbgpBCiXZA@mail.gmail.com>
Date:   Wed, 17 May 2017 09:46:38 -0400
From:   Soheil Hassas Yeganeh <soheil@...gle.com>
To:     Eric Dumazet <edumazet@...gle.com>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Neal Cardwell <ncardwell@...gle.com>,
        Yuchung Cheng <ycheng@...gle.com>,
        Wei Wang <weiwan@...gle.com>, netdev <netdev@...r.kernel.org>,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: [PATCH net-next 09/15] tcp: use tcp_jiffies32 to feed probe_timestamp

On Tue, May 16, 2017 at 5:00 PM, Eric Dumazet <edumazet@...gle.com> wrote:
> Use tcp_jiffies32 instead of tcp_time_stamp, since
> tcp_time_stamp will soon be only used for TCP TS option.
>
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Acked-by: Soheil Hassas Yeganeh <soheil@...gle.com>

> ---
>  net/ipv4/tcp_output.c | 6 +++---
>  net/ipv4/tcp_timer.c  | 2 +-
>  2 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
> index cbda5de164495cf318960489bd8edf98fe3a5033..f0fd1b4fdb3291638fcdca613d826db2cd27f517 100644
> --- a/net/ipv4/tcp_output.c
> +++ b/net/ipv4/tcp_output.c
> @@ -1475,7 +1475,7 @@ void tcp_mtup_init(struct sock *sk)
>         icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, net->ipv4.sysctl_tcp_base_mss);
>         icsk->icsk_mtup.probe_size = 0;
>         if (icsk->icsk_mtup.enabled)
> -               icsk->icsk_mtup.probe_timestamp = tcp_time_stamp;
> +               icsk->icsk_mtup.probe_timestamp = tcp_jiffies32;
>  }
>  EXPORT_SYMBOL(tcp_mtup_init);
>
> @@ -1987,7 +1987,7 @@ static inline void tcp_mtu_check_reprobe(struct sock *sk)
>         s32 delta;
>
>         interval = net->ipv4.sysctl_tcp_probe_interval;
> -       delta = tcp_time_stamp - icsk->icsk_mtup.probe_timestamp;
> +       delta = tcp_jiffies32 - icsk->icsk_mtup.probe_timestamp;
>         if (unlikely(delta >= interval * HZ)) {
>                 int mss = tcp_current_mss(sk);
>
> @@ -1999,7 +1999,7 @@ static inline void tcp_mtu_check_reprobe(struct sock *sk)
>                 icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, mss);
>
>                 /* Update probe time stamp */
> -               icsk->icsk_mtup.probe_timestamp = tcp_time_stamp;
> +               icsk->icsk_mtup.probe_timestamp = tcp_jiffies32;
>         }
>  }
>
> diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
> index 9e0616cb8c17a6385ac97fc0cd657ef9413a1749..6629f47aa7f0182ece7873afcc3daa6f0019e228 100644
> --- a/net/ipv4/tcp_timer.c
> +++ b/net/ipv4/tcp_timer.c
> @@ -115,7 +115,7 @@ static void tcp_mtu_probing(struct inet_connection_sock *icsk, struct sock *sk)
>         if (net->ipv4.sysctl_tcp_mtu_probing) {
>                 if (!icsk->icsk_mtup.enabled) {
>                         icsk->icsk_mtup.enabled = 1;
> -                       icsk->icsk_mtup.probe_timestamp = tcp_time_stamp;
> +                       icsk->icsk_mtup.probe_timestamp = tcp_jiffies32;
>                         tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);
>                 } else {
>                         struct net *net = sock_net(sk);
> --
> 2.13.0.303.g4ebf302169-goog
>