[TEST] CX7 timeouts on reconfig w/ page pool failure injection

[TEST] CX7 timeouts on reconfig w/ page pool failure injection

[Jakub Kicinski]

Hi!

The CX7 testing in NIPA is looking pretty good, one major source of
noise, tho, is that the pp-alloc test sometimes locks rtnl for
a minute.

Here's a failure in that test itself:

# # Exception| subprocess.TimeoutExpired: Command '['ethtool', '-G', 'ens25f1np1', 'rx', '2048']' timed out after 20 seconds
# # Exception| 
# not ok 1 pp_alloc_fail.test_pp_alloc

https://netdev.bots.linux.dev/logview.html?f=/logs/hwksft/CX7-dbg/results/763842/test-outputs/36-pp-alloc-fail-py/stdout

Then the next test that runs also times out during setup:

# subprocess.TimeoutExpired: Command '['ip', '--json', '-d', 'link', 'show', 'dev', 'ens25f1np1']' timed out after 20 seconds
not ok 1 selftests: drivers/net/hw: rss_api.py # exit=1

https://netdev.bots.linux.dev/logs/hwksft/CX7-dbg/results/763842/test-outputs/37-rss-api-py/stdout

pp_alloc test can fail, but spilling into the next test is a problem.

At the retry things clear up enough to return to happiness, tho:

https://netdev.bots.linux.dev/logs/hwksft/CX7-dbg/results/763842/test-outputs/37-rss-api-py-retry/stdout

I haven't try to dig into where it is blocked but does this ring any
bells?

Re: [TEST] CX7 timeouts on reconfig w/ page pool failure injection

[Dragos Tatulea]

On 04.08.26 18:45, Jakub Kicinski wrote:
> Hi!
> 
> The CX7 testing in NIPA is looking pretty good, one major source of
> noise, tho, is that the pp-alloc test sometimes locks rtnl for
> a minute.
> 
> Here's a failure in that test itself:
> 
> # # Exception| subprocess.TimeoutExpired: Command '['ethtool', '-G', 'ens25f1np1', 'rx', '2048']' timed out after 20 seconds
> # # Exception| 
> # not ok 1 pp_alloc_fail.test_pp_alloc
> 
> https://netdev.bots.linux.dev/logview.html?f=/logs/hwksft/CX7-dbg/results/763842/test-outputs/36-pp-alloc-fail-py/stdout
> 
> Then the next test that runs also times out during setup:
> 
> # subprocess.TimeoutExpired: Command '['ip', '--json', '-d', 'link', 'show', 'dev', 'ens25f1np1']' timed out after 20 seconds
> not ok 1 selftests: drivers/net/hw: rss_api.py # exit=1
> 
> https://netdev.bots.linux.dev/logs/hwksft/CX7-dbg/results/763842/test-outputs/37-rss-api-py/stdout
> 
> pp_alloc test can fail, but spilling into the next test is a problem.
> 
> At the retry things clear up enough to return to happiness, tho:
> 
> https://netdev.bots.linux.dev/logs/hwksft/CX7-dbg/results/763842/test-outputs/37-rss-api-py-retry/stdout
> 
> I haven't try to dig into where it is blocked but does this ring any
> bells?
Not to me. We can try an internal reproduction.

Randomly clicking around the flakes page, I found another instance of
pp_alloc_fail.py running and getting crashes in mlx5 during page
deallocation:
https://netdev.bots.linux.dev/logs/hwksft/CX7-dbg/results/762402/sol-machine-2

Is this also something new?

Thanks,
Dragos

Re: [TEST] CX7 timeouts on reconfig w/ page pool failure injection

[Jakub Kicinski]

On Tue, 4 Aug 2026 19:16:19 +0200 Dragos Tatulea wrote:
> Randomly clicking around the flakes page, I found another instance of
> pp_alloc_fail.py running and getting crashes in mlx5 during page
> deallocation:
> https://netdev.bots.linux.dev/logs/hwksft/CX7-dbg/results/762402/sol-machine-2
> 
> Is this also something new?

Ah, that was going to be my next ask. (there were some fake "crashes"
reported in NIPA because the system was retrying and running out of
time, that's hopefully fixed as of this morning so the signal will
be cleaner)

The crash has been hitting since the beginning of July (if it gets
line wrapped into oblivion the tl;dr is that first hit was
net-next-hw-2026-07-03--00-00):

            branch             |       test       |                                                                                                                    crashes                                                                                                             
       
-------------------------------+------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-------
 net-next-hw-2026-08-04--16-00 | pp-alloc-fail-py | ["", "mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action", "mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:mlx5e_free_rx_mpwqe:__napi_poll"]
 net-next-hw-2026-08-03--08-00 | pp-alloc-fail-py | ["mlx5e_free_rx_mpwqe", "mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-08-02--16-00 | pp-alloc-fail-py | ["", "mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-08-02--08-00 | pp-alloc-fail-py | ["mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-31--00-00 | pp-alloc-fail-py | [""]
 net-next-hw-2026-07-28--08-00 | pp-alloc-fail-py | ["mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-28--00-00 | pp-alloc-fail-py | ["mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-26--16-00 | pp-alloc-fail-py | ["mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-25--16-00 | pp-alloc-fail-py | ["", "mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll", "mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-25--08-00 | pp-alloc-fail-py | ["mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-25--00-00 | pp-alloc-fail-py | ["mlx5e_free_rx_mpwqe:mlx5e_dealloc_rx_mpwqe:mlx5e_free_rx_descs:mlx5e_close_rq:mlx5e_close_queues"]
 net-next-hw-2026-07-23--00-00 | pp-alloc-fail-py | ["mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-19--16-03 | pp-alloc-fail-py | ["mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-19--08-00 | pp-alloc-fail-py | ["mlx5e_free_rx_mpwqe:mlx5e_dealloc_rx_mpwqe:mlx5e_free_rx_descs:mlx5e_close_rq:mlx5e_close_queues", "mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-18--00-00 | pp-alloc-fail-py | [""]
 net-next-hw-2026-07-17--16-00 | pp-alloc-fail-py | ["mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-17--00-00 | irq-py           | ["mlx5e_free_rx_mpwqe:mlx5e_dealloc_rx_mpwqe:mlx5e_free_rx_descs:mlx5e_close_rq:mlx5e_close_queues"]
 net-next-hw-2026-07-15--08-00 | pp-alloc-fail-py | ["mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes"]
 net-next-hw-2026-07-13--16-00 | pp-alloc-fail-py | ["mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-13--08-00 | pp-alloc-fail-py | ["", "mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-13--00-00 | pp-alloc-fail-py | ["mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-12--16-00 | pp-alloc-fail-py | ["mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-11--00-00 | pp-alloc-fail-py | ["mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-10--08-00 | pp-alloc-fail-py | ["", "mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-10--00-00 | pp-alloc-fail-py | ["", "mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-09--08-00 | pp-alloc-fail-py | ["mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:mlx5e_free_rx_mpwqe"]
 net-next-hw-2026-07-09--00-00 | pp-alloc-fail-py | ["handle_softirqs:run_ksoftirqd:mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll", "mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-08--08-00 | pp-alloc-fail-py | [""]
 net-next-hw-2026-07-07--16-00 | ethtool-rmon-sh  | ["mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-07--08-00 | pp-alloc-fail-py | ["", "mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-07--00-00 | pp-alloc-fail-py | ["mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-06--16-00 | pp-alloc-fail-py | ["mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action", "ret_from_fork_asm"]
 net-next-hw-2026-07-06--00-00 | irq-py           | ["mlx5e_free_rx_mpwqe:mlx5e_dealloc_rx_mpwqe:mlx5e_free_rx_descs:mlx5e_close_rq:mlx5e_close_queues"]
 net-next-hw-2026-07-05--16-00 | pp-alloc-fail-py | ["", "mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]
 net-next-hw-2026-07-03--00-00 | pp-alloc-fail-py | ["", "mlx5e_free_rx_mpwqe:mlx5e_post_rx_mpwqes:mlx5e_napi_poll:__napi_poll:net_rx_action"]


(for my own record)
 SELECT
      r.branch,       
      x.test,
      x.crashes
  FROM results AS r
  CROSS JOIN LATERAL jsonb_to_recordset(
      r.json_full::jsonb -> 'results'
  ) AS x(test text, crashes jsonb)
  WHERE r.remote = 'netdev-CX7-dbg'
    AND x.crashes IS NOT NULL 
    AND x.crashes <> '["kernel crash during test"]'::jsonb
  ORDER BY r.branch_date DESC;