On Fri, 1 Nov 2024 00:48:33 +0000 Joe Damato wrote: > + ip netns exec nscl nc -N 192.168.1.1 48675 < $tmp_file Thanks a lot for adding the test. Could you replace nc with socat or a similar tool? There are multiple incompatible implementations of netcat packaged by various distros, we get: # selftests: net: busy_poll_test.sh # nc: invalid option -- 'N' # Ncat: Try `--help' or man(1) ncat for more information, usage options and help. QUITTING. nc is a known PITA. > + # set the suspend parameter for the server via its IFIDX > + > + DUMP_CMD="${YNL_PATH} --spec ${SPEC_PATH} --dump napi-get --json=\"{\\\"ifindex\\\": ${NSIM_DEV_1_IFIDX}}\" --output-json" > + NSIM_DEV_1_NAPIID=$(ip netns exec nssv bash -c "$DUMP_CMD") > + NSIM_DEV_1_NAPIID=$(echo $NSIM_DEV_1_NAPIID | jq '.[] | .id') > + > + SUSPEND_CMD="${YNL_PATH} --spec ${SPEC_PATH} --do napi-set --json=\"{\\\"id\\\": ${NSIM_DEV_1_NAPIID}, \\\"irq-suspend-timeout\\\": 20000000, \\\"gro-flush-timeout\\\": 50000, \\\"defer-hard-irqs\\\": 100}\"" > + NSIM_DEV_1_SETCONFIG=$(ip netns exec nssv bash -c "$SUSPEND_CMD") Can you try to run this test in installed mode? https://docs.kernel.org/dev-tools/kselftest.html#install-selftests IIRC YNL moves around when we install, you'd either need to do autodetection of the path (see tools/testing/selftests/net/lib/py/ynl.py and if you go down this route please move the helper which exports the YNL variables to lib.sh so other tests can reuse); or teach the C code to do the setup, you can link against YNL fairly easily (look at where ncdevmem is added in the Makefile, it uses YNL)