kernel/tools/testing/selftests/net/busy_poller.c, branch linux-rolling-stable

selftests: Add napi threaded busy poll test in `busy_poller`

2025-11-04T02:11:40Z

Add testcase to run busy poll test with threaded napi busy poll enabled. Signed-off-by: Samiullah Khawaja Reviewed-by: Willem de Bruijn Acked-by: Martin Karsten Tested-by: Martin Karsten Link: https://patch.msgid.link/20251028203007.575686-3-skhawaja@google.com Signed-off-by: Jakub Kicinski

selftests: net: cleanup busy_poller.c

2024-12-07T01:42:15Z

Fix various integer type conversions by using strtoull and a temporary variable which is bounds checked before being casted into the appropriate cfg_* variable for use by the test program. While here: - free the strdup'd cfg string for overall hygenie. - initialize napi_id = 0 in setup_queue to avoid warnings on some compilers. Signed-off-by: Joe Damato Acked-by: Stanislav Fomichev Link: https://patch.msgid.link/20241204163239.294123-1-jdamato@fastly.com Signed-off-by: Jakub Kicinski

selftests: net: Add busy_poll_test

2024-11-12T02:45:06Z

Add an epoll busy poll test using netdevsim. This test is comprised of: - busy_poller (via busy_poller.c) - busy_poll_test.sh which loads netdevsim, sets up network namespaces, and runs busy_poller to receive data and socat to send data. The selftest tests two different scenarios: - busy poll (the pre-existing version in the kernel) - busy poll with suspend enabled (what this series adds) The data transmit is a 1MiB temporary file generated from /dev/urandom and the test is considered passing if the md5sum of the input file to socat matches the md5sum of the output file from busy_poller. netdevsim was chosen instead of veth due to netdevsim's support for netdev-genl. For now, this test uses the functionality that netdevsim provides. In the future, perhaps netdevsim can be extended to emulate device IRQs to more thoroughly test all pre-existing kernel options (like defer_hard_irqs) and suspend. Signed-off-by: Joe Damato Co-developed-by: Martin Karsten Signed-off-by: Martin Karsten Acked-by: Stanislav Fomichev Reviewed-by: Willem de Bruijn Link: https://patch.msgid.link/20241109050245.191288-6-jdamato@fastly.com Signed-off-by: Jakub Kicinski