netdev - Re: WARN_ON in TLP causing RT throttling

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Date:   Fri, 28 Sep 2018 10:20:54 -0600
From:   stranche@...eaurora.org
To:     Eric Dumazet <eric.dumazet@...il.com>
Cc:     Yuchung Cheng <ycheng@...gle.com>, soheil@...gle.com,
        netdev@...r.kernel.org
Subject: Re: WARN_ON in TLP causing RT throttling

On 2018-09-27 18:25, Eric Dumazet wrote:
> On 09/27/2018 05:16 PM, stranche@...eaurora.org wrote:
> 
>> Hi Yuchung,
>> 
>> Based on the dumps we were able to get, it appears that TFO was not 
>> used in this case.
>> We also tried some local experiments where we dropped incoming SYN 
>> packets after already
>> successful TFO connections on the receive side to see if TFO would 
>> trigger this scenario, but
>> have not been able to reproduce it.
>> 
>> One other interesting thing we found is that the socket never sent or 
>> received any data. It only
>> sent/received the packets for the initial handshake and the outgoing 
>> FIN.
> 
> Just to make sure : Was this some sort of syzkaller (or other fuzzer) 
> run ?

No, this was a normal run.