kernel/tools/testing/selftests/drivers/net/hw/pp_alloc_fail.py, branch master

selftests: drv-net: pp_alloc_fail: lower traffic expectations

2025-10-09T09:10:02Z

Lower the expected level of traffic in the pp_alloc_fail test and calculate failure counter thresholds based on the traffic rather than using a fixed constant. We only have "QEMU HW" in NIPA right now, and the test (due to debug dependencies) only works on debug kernels in the first place. We need some place for it to pass otherwise it seems to be bit rotting. So lower the traffic threshold so that it passes on QEMU and with a debug kernel... Reviewed-by: Simon Horman Signed-off-by: Jakub Kicinski Reviewed-by: Jacob Keller Link: https://patch.msgid.link/20251007232653.2099376-9-kuba@kernel.org Signed-off-by: Paolo Abeni

selftests: drv-net: fix linter warnings in pp_alloc_fail

2025-10-09T09:10:02Z

Fix linter warnings, it's a bit hard to check for new ones otherwise. W0311: Bad indentation. Found 16 spaces, expected 12 (bad-indentation) C0114: Missing module docstring (missing-module-docstring) W1514: Using open without explicitly specifying an encoding (unspecified-encoding) C0116: Missing function or method docstring (missing-function-docstring) Reviewed-by: Simon Horman Signed-off-by: Jakub Kicinski Reviewed-by: Jacob Keller Link: https://patch.msgid.link/20251007232653.2099376-8-kuba@kernel.org Signed-off-by: Paolo Abeni

selftests: drv-net-hw: inject pp_alloc_fail errors in the right place

2025-01-17T01:18:53Z

The tool pp_alloc_fail.py tested error recovery by injecting errors into the function page_pool_alloc_pages(). The page pool allocation function page_pool_dev_alloc() does not end up calling page_pool_alloc_pages(). page_pool_alloc_netmems() seems to be the function that is called by all of the page pool alloc functions in the API, so move error injection to that function instead. Signed-off-by: John Daley Link: https://patch.msgid.link/20250115181312.3544-2-johndale@cisco.com Signed-off-by: Jakub Kicinski

selftests: net: ksft: replace 95 with errno.EOPNOTSUPP

2024-08-02T23:09:27Z

Petr suggested to use errno.EOPNOTSUPP instead of hard-coded 95 in the new test case. Adjust existing ones to match this style. Signed-off-by: Stanislav Fomichev Link: https://patch.msgid.link/20240802000309.2368-3-sdf@fomichev.me Signed-off-by: Jakub Kicinski

selftests: drv-net-hw: add test for memory allocation failures with page pool

2024-04-30T15:15:32Z

Bugs in memory allocation failure paths are quite common. Add a test exercising those paths based on qstat and page pool failure hook. Running on bnxt: # ./drivers/net/hw/pp_alloc_fail.py KTAP version 1 1..1 # ethtool -G change retval: success ok 1 pp_alloc_fail.test_pp_alloc # Totals: pass:1 fail:0 xfail:0 xpass:0 skip:0 error:0 I initially wrote this test to validate commit be43b7489a3c ("net/mlx5e: RX, Fix page_pool allocation failure recovery for striding rq") but mlx5 still doesn't have qstat. So I run it on bnxt, and while bnxt survives I found the problem fixed in commit 730117730709 ("eth: bnxt: fix counting packets discarded due to OOM and netpoll"). Reviewed-by: Willem de Bruijn Link: https://lore.kernel.org/r/20240429144426.743476-7-kuba@kernel.org Signed-off-by: Jakub Kicinski