netdev - Re: [PATCH net-next 0/4] selftests: drv-net: improve the queue test for XSK

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Message-ID: <Z7UBu8dgOZhYohvw@LQ3V64L9R2>
Date: Tue, 18 Feb 2025 16:55:07 -0500
From: Joe Damato <jdamato@...tly.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: davem@...emloft.net, netdev@...r.kernel.org, edumazet@...gle.com,
	pabeni@...hat.com, andrew+netdev@...n.ch, horms@...nel.org,
	shuah@...nel.org, hawk@...nel.org, petrm@...dia.com,
	willemdebruijn.kernel@...il.com
Subject: Re: [PATCH net-next 0/4] selftests: drv-net: improve the queue test
 for XSK

On Tue, Feb 18, 2025 at 11:50:44AM -0800, Jakub Kicinski wrote:
> We see some flakes in the the XSK test:
> 
>    Exception| Traceback (most recent call last):
>    Exception|   File "/home/virtme/testing-18/tools/testing/selftests/net/lib/py/ksft.py", line 218, in ksft_run
>    Exception|     case(*args)
>    Exception|   File "/home/virtme/testing-18/tools/testing/selftests/drivers/net/./queues.py", line 53, in check_xdp
>    Exception|     ksft_eq(q['xsk'], {})
>    Exception| KeyError: 'xsk'
> 
> I think it's because the method or running the helper in the background
> is racy. Add more solid infra for waiting for a background helper to be
> initialized.

Sorry for the raciness I introduced. I think overall the direction
this is going is good - thanks for cleaning this up.

Please see my comments on patch 2 and the hang introduced with this
change.