netdev - Re: [PATCH v5 net-next 11/13] tcp: allow ECN bits in TOS/traffic class

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Message-ID: <CANn89i+yj5DGj=OF58Uez6m0xt1n-6bi=vnG7PX1frBPWm+eNw@mail.gmail.com>
Date: Thu, 7 Nov 2024 13:55:39 +0100
From: Eric Dumazet <edumazet@...gle.com>
To: chia-yu.chang@...ia-bell-labs.com
Cc: netdev@...r.kernel.org, dsahern@...il.com, davem@...emloft.net, 
	dsahern@...nel.org, pabeni@...hat.com, joel.granados@...nel.org, 
	kuba@...nel.org, andrew+netdev@...n.ch, horms@...nel.org, pablo@...filter.org, 
	kadlec@...filter.org, netfilter-devel@...r.kernel.org, coreteam@...filter.org, 
	ij@...nel.org, ncardwell@...gle.com, koen.de_schepper@...ia-bell-labs.com, 
	g.white@...lelabs.com, ingemar.s.johansson@...csson.com, 
	mirja.kuehlewind@...csson.com, cheshire@...le.com, rs.ietf@....at, 
	Jason_Livingood@...cast.com, vidhi_goel@...le.com
Subject: Re: [PATCH v5 net-next 11/13] tcp: allow ECN bits in TOS/traffic class

On Tue, Nov 5, 2024 at 11:07 AM <chia-yu.chang@...ia-bell-labs.com> wrote:
>
> From: Ilpo Järvinen <ij@...nel.org>
>
> AccECN connection's last ACK cannot retain ECT(1) as the bits
> are always cleared causing the packet to switch into another
> service queue.
>
> This effectively adds a finer-grained filtering for ECN bits
> so that acceptable TW ACKs can retain the bits.

Too cryptic changelog.

Please add more explanations, because I could not really understand
the intent of this patch.