netdev - Re: [PATCH net] selftests: fixes for UDP GRO

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Message-ID: <CAF=yD-LeXUVU26iX-di5vfdDvrfuuAcJmyGGpUGN5FHX0fi0Wg@mail.gmail.com>
Date:   Tue, 26 Feb 2019 13:38:00 -0500
From:   Willem de Bruijn <willemdebruijn.kernel@...il.com>
To:     Paolo Abeni <pabeni@...hat.com>
Cc:     Network Development <netdev@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Willem de Bruijn <willemb@...gle.com>
Subject: Re: [PATCH net] selftests: fixes for UDP GRO

On Tue, Feb 26, 2019 at 9:28 AM Paolo Abeni <pabeni@...hat.com> wrote:
>
> The current implementation for UDP GRO tests is racy: the receiver
> may flush the RX queue while the sending is still transmitting and
> incorrectly report RX errors, with a wrong number of packet received.
>
> Add explicit timeouts to the receiver for both connection activation
> (first packet received for UDP) and reception completion, so that
> in the above critical scenario the receiver will wait for the
> transfer completion.
>
> Fixes: 3327a9c46352 ("selftests: add functionals test for UDP GRO")
> Signed-off-by: Paolo Abeni <pabeni@...hat.com>

Acked-by: Willem de Bruijn <willemb@...gle.com>

---

This is because of that "force termination after the second poll()"?

Could perhaps also just extend do_recv to wait while (!interrupted &&
tnow < tstart + 2000) and avoid the explicit arguments.