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Age	Commit message (Collapse)	Author
2026-10-12	selftests/sched_ext: Fix build error in dequeue_remote selftest	Samuele Mariotti
	Building the dequeue_remote selftest with newer compilers (e.g., gcc 16) triggers the following error: dequeue_remote.c:39:32: error: variable ‘sum’ set but not used The 'volatile' qualifier prevents the writes from being optimized away, but does not silence the warning, since 'sum' is indeed only written and never read. Consume 'sum' via an empty asm() with a register input constraint, as already done for the dequeue selftest in commit 3788e3251653 ("selftests/sched_ext: Fix build error in dequeue selftest"). This forces the compiler to keep the accumulated value (preserving the CPU stress loop) and avoids the build error. Signed-off-by: Samuele Mariotti <smariotti@disroot.org> Reviewed-by: Kuba Piecuch <jpiecuch@google.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2026-09-30	selftests/sched_ext: Add a test for ops.dequeue() on remote local DSQ moves	Kuba Piecuch
	Add a dequeue_remote test that makes moves of tasks in the BPF scheduler's custody to another CPU's local DSQ the common case, both via SCX_DSQ_LOCAL_ON dispatch and via scx_bpf_dsq_move_to_local(). The BPF scheduler tracks each task's custody state and triggers scx_bpf_error() if a custody period doesn't end with exactly one ops.dequeue() before the task runs, or if it ends with an SCX_DEQ_CORE_SCHED_EXEC dequeue of a task without a core cookie. Without the previous patch, the test fails with: sched_ext: dequeue_remote: dequeue_remote.bpf.c:141: 15 (rcu_preempt): late ops.dequeue() with SCX_DEQ_CORE_SCHED_EXEC (enq_cpu=3 cpu=2 seq=1) ... ops_dequeue+0x114/0x170 set_next_task_scx+0x104/0x1e0 __pick_next_task+0xc7/0x180 __schedule+0x154/0x1870 Reviewed-by: Andrea Righi <arighi@nvidia.com> Assisted-by: Claude:claude-opus-5.5 Signed-off-by: Kuba Piecuch <jpiecuch@google.com> Signed-off-by: Tejun Heo <tj@kernel.org>