linux-kernel - Re: linux 5.17.1 disregarding ACK values resulting in stalled TCP connections

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Message-ID: <10c1e561-8f01-784f-c4f4-a7c551de0644@uls.co.za>
Date:   Wed, 30 Mar 2022 08:22:28 +0200
From:   Jaco Kroon <jaco@....co.za>
To:     Eric Dumazet <edumazet@...gle.com>
Cc:     Neal Cardwell <ncardwell@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Netdev <netdev@...r.kernel.org>,
        Yuchung Cheng <ycheng@...gle.com>
Subject: Re: linux 5.17.1 disregarding ACK values resulting in stalled TCP
 connections

Hi Eric,

On 2022/03/30 05:48, Eric Dumazet wrote:
> On Tue, Mar 29, 2022 at 7:58 PM Jaco Kroon <jaco@....co.za> 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
host.
>
> 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,
Jaco