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SubjectRe: [bug, bisected] pfifo_fast causes packet reordering
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On 16.03.18 11:26, Jakob Unterwurzacher wrote:
> On 15.03.18 23:30, John Fastabend wrote:
>>> I have reproduced it using two USB network cards connected to each
>>> other. The test tool sends UDP packets containing a counter and
>>> listens on the other interface, it is available at
>>> https://github.com/jakob-tsd/pfifo_stress/blob/master/pfifo_stress.py
>>
>> Great thanks, can you also run this with taskset to bind to
>> a single CPU,
>>
>>   # taskset 0x1 ./pifof_stress.py
>>
>> And let me know if you still see the OOO.
>
> Interesting. Looks like it depends on which core it runs on. CPU0 is
> clean, CPU1 is not.

So we are at v4.16-rc6 now - have you managed to reproduce this is or
should I try to get the revert correct?

Best regards,
Jakob

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