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Date: Sat, 27 May 2017 14:10:15 +0200
From: Willy Tarreau <w@1wt.eu>
To: Lars Erik =?iso-8859-1?Q?Storbuk=E5s?= <storbukas.dev@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: TCP get SND_CWND change on loss event
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On Sat, May 27, 2017 at 02:08:01PM +0200, Lars Erik Storbukås wrote:
> I want to store the value of snd_cwnd when a congestion event occurs
> (value before snd_cwnd is reduced), and the new value of snd_cwnd (the
> value it has been reduced to). In other words: the congestion window
> before and after a congestion event occurs.
(...)

At the very least you should post this to netdev to get a useful response.

Willy