selftests/sched_ext: Check the cmask cid-form ops.enable() receives

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cid-form ops.enable() now hands the task's cmask to the scheduler and
set_cmask() repeats it right after. Add a cid-form selftest that checks both
against p->cpus_ptr, that they match each other, that the initial
set_cmask() lands before set_weight() and before the task first becomes
runnable, and that set_cmask() never precedes enable(), across class-switch
enables, fork-path enables and live affinity changes.

v2: Mismatch details returned through a caller-local struct instead of
globals, alloc_words validated in the header check, loop bounded by nr_cids
directly (Andrea Righi).

Signed-off-by: Tejun Heo <tj@kernel.org>

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Tejun Heo 2026-09-19 04:08:20 -10:00

parent 3bd46666cf

commit d781d1b78a

3 changed files with 356 additions and 0 deletions

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1

tools/testing/selftests/sched_ext/Makefile

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217

tools/testing/selftests/sched_ext/enable_cmask.bpf.c

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138

tools/testing/selftests/sched_ext/enable_cmask.c

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