netdev - RE: [PATCH v2 net-next 03/14] tcp: accecn: Add ece_delta to rate

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Message-ID:
 <PAXPR07MB7984DC6C693DAED54AC14161A31FA@PAXPR07MB7984.eurprd07.prod.outlook.com>
Date: Thu, 25 Sep 2025 07:40:03 +0000
From: "Chia-Yu Chang (Nokia)" <chia-yu.chang@...ia-bell-labs.com>
To: Paolo Abeni <pabeni@...hat.com>, "edumazet@...gle.com"
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CC: "Olivier Tilmans (Nokia)" <olivier.tilmans@...ia.com>
Subject: RE: [PATCH v2 net-next 03/14] tcp: accecn: Add ece_delta to
 rate_sample

> -----Original Message-----
> From: Paolo Abeni <pabeni@...hat.com> 
> Sent: Tuesday, September 23, 2025 11:48 AM
> To: Chia-Yu Chang (Nokia) <chia-yu.chang@...ia-bell-labs.com>; edumazet@...gle.com; linux-doc@...r.kernel.org; corbet@....net; horms@...nel.org; dsahern@...nel.org; kuniyu@...zon.com; bpf@...r.kernel.org; netdev@...r.kernel.org; dave.taht@...il.com; jhs@...atatu.com; kuba@...nel.org; stephen@...workplumber.org; xiyou.wangcong@...il.com; jiri@...nulli.us; davem@...emloft.net; andrew+netdev@...n.ch; donald.hunter@...il.com; ast@...erby.net; liuhangbin@...il.com; shuah@...nel.org; linux-kselftest@...r.kernel.org; ij@...nel.org; ncardwell@...gle.com; Koen De Schepper (Nokia) <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
> Cc: Olivier Tilmans (Nokia) <olivier.tilmans@...ia.com>
> Subject: Re: [PATCH v2 net-next 03/14] tcp: accecn: Add ece_delta to rate_sample
> 
> 
> CAUTION: This is an external email. Please be very careful when clicking links or opening attachments. See the URL nok.it/ext for additional information.
> 
> 
> 
> On 9/18/25 6:21 PM, chia-yu.chang@...ia-bell-labs.com wrote:
> > From: Ilpo Järvinen <ij@...nel.org>
> >
> > Include echoed CE count into rate_sample. Replace local ecn_count 
> > variable with it.
> 
> Why? skimming over the next few patches it's not clear to me which is the goal here.
> 
> Expanding the commit message would help, thanks!
> 
> Paolo

Hi Paolo,

Sorry for my late reply.
Here, ece_delata will be used in the next patch series by tcp_prague (or other congestion control algorithm) that support Prague requirement to adjust the congestion window accordingly.
I will elaborate more on the patch notes, or you think this shall stay in the tcp_prague patch series?

Best regards,
Chia-Yu