netdev - Re: [PATCH v9 net-next 14/15] tcp: accecn: enable AccECN

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Message-ID: <CANn89i+fQQvoVhpg3HVh=RerB1tjKi25kGypVh3fwob2HWoH2Q@mail.gmail.com>
Date: Tue, 20 Jan 2026 12:19:40 +0100
From: Eric Dumazet <edumazet@...gle.com>
To: chia-yu.chang@...ia-bell-labs.com
Cc: pabeni@...hat.com, parav@...dia.com, linux-doc@...r.kernel.org, 
	corbet@....net, horms@...nel.org, dsahern@...nel.org, kuniyu@...gle.com, 
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	Jason_Livingood@...cast.com, vidhi_goel@...le.com
Subject: Re: [PATCH v9 net-next 14/15] tcp: accecn: enable AccECN

On Mon, Jan 19, 2026 at 7:59 PM <chia-yu.chang@...ia-bell-labs.com> wrote:
>
> From: Chia-Yu Chang <chia-yu.chang@...ia-bell-labs.com>
>
> Enable Accurate ECN negotiation and request for incoming and
> outgoing connection by setting sysctl_tcp_ecn:
>
> +==============+===========================================+
> |              |  Highest ECN variant (Accurate ECN, ECN,  |
> |   tcp_ecn    |  or no ECN) to be negotiated & requested  |
> |              +---------------------+---------------------+
> |              | Incoming connection | Outgoing connection |
> +==============+=====================+=====================+
> |      0       |        No ECN       |        No ECN       |
> |      1       |         ECN         |         ECN         |
> |      2       |         ECN         |        No ECN       |
> +--------------+---------------------+---------------------+
> |      3       |     Accurate ECN    |     Accurate ECN    |
> |      4       |     Accurate ECN    |         ECN         |
> |      5       |     Accurate ECN    |        No ECN       |
> +==============+=====================+=====================+
>
> Refer Documentation/networking/ip-sysctl.rst for more details.
>
> Signed-off-by: Chia-Yu Chang <chia-yu.chang@...ia-bell-labs.com>
> Acked-by: Paolo Abeni <pabeni@...hat.com>
> ---

Reviewed-by: Eric Dumazet <edumazet@...gle.com>