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Date:   Tue, 28 May 2019 13:11:24 -0400
From:   Willem de Bruijn <willemdebruijn.kernel@...il.com>
To:     Fred Klassen <fklassen@...neta.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        Shuah Khan <shuah@...nel.org>,
        Network Development <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-kselftest@...r.kernel.org,
        Willem de Bruijn <willemb@...gle.com>
Subject: Re: [PATCH net 4/4] net/udpgso_bench_tx: audit error queue

 > Now that I know the issue is only in TCP, I can speculate that all bytes are
> > being reported, but done with fewer messages. It may warrant some
> > investigation in case there is some kind of bug.
>
> This would definitely still be a bug and should not happen. We have
> quite a bit of experience with TCP zerocopy and I have not run into
> this in practice, so I do think that it is somehow a test artifact.

To be clear, I'm not saying that it is an artifact of your extensions.
It's quite likely that the zerocopy benchmark was a bit flaky in that
regard all along. No need to spend further time on that for this
patchset.

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