en Copyright 2015 Java http://kernelsources.org:8080/source/history/linux/tools/testing/selftests/sched_ext/enable_cmask.c#ee9c669f9bf5fd2c24206746ded9382fe810df89 Merge tag 'sched_ext-for-7.3-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_extPull sched_ext fixes from Tejun Heo: - A task reenqueued while its dispatch was still completing had its queued state clobbered by the dispatcher, dropping every later dispatch of the task. Wait for the in-flight dispatch to settle first - A wakeup activation on another CPU marked the destination runqueue as mid-wakeup, stranding a pending local reenqueue. If the scheduler was unloaded first, the stale request pointed into freed memory that the next scheduler dereferenced - ops.dequeue() ran with the source dispatch queue's lock held, so a scheduler iterating that queue from the callback deadlocked the CPU - Schedulers with their own CPU ID mapping had no way to learn a task's initial CPU mask and rebuilt it themselves, which went wrong across sub-scheduler enable and re-home. Pass it to ops.enable() - A bypass dispatch event counter missed the dispatches made by the end-of-dispatch fallback and under-reported - Selftests for the dequeue locking and initial mask changes* tag 'sched_ext-for-7.3-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext: sched_ext: Count SCX_EV_SUB_BYPASS_DISPATCH in the dispatch fallback selftests/sched_ext: Check the cmask cid-form ops.enable() receives sched_ext: Pass the initial cmask to cid-form ops.enable() selftests/sched_ext: Test that ops.dequeue() can iterate the consumed DSQ sched_ext: Don't run ops.dequeue() with a DSQ lock held sched_ext: Derive SCX_RQ_IN_WAKEUP from the core enqueue flags sched_ext: Wait for SCX_OPSS_DISPATCHING before reenqueueing a task List of files: /linux/tools/testing/selftests/sched_ext/enable_cmask.c Fri, 25 Sep 2026 00:04:11 +0200 Linus Torvalds <torvalds@linux-foundation.org> http://kernelsources.org:8080/source/history/linux/tools/testing/selftests/sched_ext/enable_cmask.c#d781d1b78acf547bafeb1592e8ba4020dce515c6 selftests/sched_ext: Check the cmask cid-form ops.enable() receivescid-form ops.enable() now hands the task's cmask to the scheduler andset_cmask() repeats it right after. Add a cid-form selftest that checks bothagainst p->cpus_ptr, that they match each other, that the initialset_cmask() lands before set_weight() and before the task first becomesrunnable, and that set_cmask() never precedes enable(), across class-switchenables, fork-path enables and live affinity changes.v2: Mismatch details returned through a caller-local struct instead ofglobals, alloc_words validated in the header check, loop bounded by nr_cidsdirectly (Andrea Righi).Signed-off-by: Tejun Heo <tj@kernel.org> List of files: /linux/tools/testing/selftests/sched_ext/enable_cmask.c Sat, 19 Sep 2026 16:08:20 +0200 Tejun Heo <tj@kernel.org>