Re: [PATCH net v2 0/2] tcp_metrics: fix hanlding of route options

[Eric Dumazet]

On Fri, Jun 20, 2025 at 5:57 AM Petr Tesarik <ptesarik@xxxxxxxx> wrote:
>
> I ran into a couple of issues while trying to tweak TCP congestion
> avoidance to analyze a potential performance regression. It turns out
> that overriding the parameters with ip-route(8) does not work as
> expected and appears to be buggy.

Hi Petr

Could you add packetdrill tests as well ?

Given this could accidentally break user setups, maybe net-next would be safer.

Some of us disable tcp_metrics, because metrics used one minute (or
few seconds) in the past are not very helpful, and source of
confusion.

(/proc/sys/net/ipv4/tcp_no_metrics_save set to 1)