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Date:   Wed, 30 Mar 2022 08:22:28 +0200
From:   Jaco Kroon <>
To:     Eric Dumazet <>
Cc:     Neal Cardwell <>,
        LKML <>,
        Netdev <>,
        Yuchung Cheng <>
Subject: Re: linux 5.17.1 disregarding ACK values resulting in stalled TCP

Hi Eric,

On 2022/03/30 05:48, Eric Dumazet wrote:
> On Tue, Mar 29, 2022 at 7:58 PM Jaco Kroon <> wrote:
> I do not think this commit is related to the issue you have.
> I guess you could try a revert ?
> Then, if you think old linux versions were ok, start a bisection ?
That'll be interesting, will see if I can reproduce on a non-production
> Thank you.
> (I do not see why a successful TFO would lead to a freeze after ~70 KB
> of data has been sent)

I do actually agree with this in that it makes no sense, but disabling
TFO definitely resolved the issue for us.

Kind Regards,

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