Re: [PATCH RFC net-next 0/4] tcp: RFC 7323-compliant window retraction handling

[Eric Dumazet]

On Mon, Feb 23, 2026 at 1:07 AM Simon Baatz <gmbnomis@xxxxxxxxx> wrote:
>
> Hi Eric,
>
> On Fri, Feb 20, 2026 at 09:58:00AM +0100, Eric Dumazet wrote:
> > Hi Simon, thanks for the clean series.
> >
> > I would guess you use some AI ? This is fine, just curious.
>
> Thank you!  Yes, I’ve found AI helpful for getting familiar with a
> new code base.  I also use it to refine or clean up the wording of
> bigger commit messages.  Code generation works quite well for quick,
> throw‑away code (like reproducers).
>
> > Can you add more tests, in memory stress situations ?
> >
> > Like :
> >
> > A receiver grew the RWIN over time up to 8 MB.
> >
> > Then the application (or the kernel under stress) used SO_RCVBUF to 16K.
> >
> > I want to make sure the socket wont accept packets to fill the prior
> > window and consume 8MB
>
> I suspect generating 8 MB worth of RX data in packetdrill won't be
> fun (unless there’s a trick I’m missing).  And using regular TCP
> sockets on both ends would probably be rather uninteresting (no
> packets sent once RWIN = 0)
>

8MB was only to show my point.

A packetdrill test reaching 1MB should be doable.