linux-kernel - Re: [PATCH net-next] tcp: use REXMIT

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Message-ID: <CADVnQy=osX-HAnRduPid27tNZHLrzudT+5C4-+K3ERY-BMW3VA@mail.gmail.com>
Date:   Thu, 2 Jan 2020 11:45:47 -0500
From:   Neal Cardwell <ncardwell@...gle.com>
To:     Mao Wenan <maowenan@...wei.com>
Cc:     Eric Dumazet <edumazet@...gle.com>,
        David Miller <davem@...emloft.net>,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        Netdev <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org, Yuchung Cheng <ycheng@...gle.com>
Subject: Re: [PATCH net-next] tcp: use REXMIT_NEW instead of magic number

On Thu, Jan 2, 2020 at 9:07 AM Mao Wenan <maowenan@...wei.com> wrote:
>
> REXMIT_NEW is a macro for "FRTO-style
> transmit of unsent/new packets", this patch
> makes it more readable.
>
> Signed-off-by: Mao Wenan <maowenan@...wei.com>
> ---
>  net/ipv4/tcp_input.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
> index 88b987ca9ebb..1d1e3493965f 100644
> --- a/net/ipv4/tcp_input.c
> +++ b/net/ipv4/tcp_input.c
> @@ -3550,7 +3550,7 @@ static void tcp_xmit_recovery(struct sock *sk, int rexmit)
>         if (rexmit == REXMIT_NONE || sk->sk_state == TCP_SYN_SENT)
>                 return;
>
> -       if (unlikely(rexmit == 2)) {
> +       if (unlikely(rexmit == REXMIT_NEW)) {
>                 __tcp_push_pending_frames(sk, tcp_current_mss(sk),
>                                           TCP_NAGLE_OFF);
>                 if (after(tp->snd_nxt, tp->high_seq))
> --

Acked-by: Neal Cardwell <ncardwell@...gle.com>

Thanks for sending this patch!

neal