netdev - Re: Invalid timestamp? causing tight ack loop (hundreds of thousands of packets / sec)

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Message-ID: <CAO-X30umnbpQG9mwj67ZUkxQpVcGgMMsP8SqY=_3ZeoTczjbmQ@mail.gmail.com>
Date:	Thu, 5 Feb 2015 15:25:05 -0800
From:	Avery Fay <avery@...panel.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	netdev@...r.kernel.org, Neal Cardwell <ncardwell@...gle.com>
Subject: Re: Invalid timestamp? causing tight ack loop (hundreds of thousands
 of packets / sec)

On Wed, Feb 4, 2015 at 4:20 AM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> Nice, something is really broken on this peer (not a linux one for
> sure), or some really buggy middlebox.
>
> The strange [P.] frame with no payload has a wrong sequence number
> anyway, so we send back a duplicate ack.

Thanks for this analysis. I've tried to reach out to the gatech NOC to
identify the device, but I haven't been able to get a response from
anyone (except general support, but they don't want to put me in touch
with someone who can help).

>
> Neal patches definitely would solve this issue.
>
>

Are these available anywhere? Or could they be made available? This
seems like a much better solution than disabling timestamps.

Avery
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