Subject: Re: [PATCH net-next 0/2] RTAX_INITRWND should be able to bring the rcv_ssthresh above 64KiB

From: Jakub Kicinski <[email-masked]>
Date: Thu, 21 Jul 2022 18:54:01 -0700

On Thu, 21 Jul 2022 17:10:39 +0200 Marek Majkowski wrote:
> Among many route options we support initrwnd/RTAX_INITRWND path
> attribute:
> 
>  $ ip route change local 127.0.0.0/8 dev lo initrwnd 1024
> 
> This sets the initial receive window size (in packets). However, it's
> not very useful in practice. For smaller buffers (<128KiB) it can be
> used to bring the initial receive window down, but it's hard to
> imagine when this is useful. The same effect can be achieved with
> TCP_WINDOW_CLAMP / RTAX_WINDOW option.

I think you based this on bpf-next so you should put bpf-next 
in the subject, it doesn't apply to net-next. Either way let's 
wait for Eric to comment.