Re: [PATCHSET v3 sched_ext/for-7.2] sched_ext: Topological CPU IDs and cid-form struct_ops

[Tejun Heo]

Hello,

Yeah. Expanding the in-kernel idle selector to be sub-sched-aware is
hard - it has to respect each sub-sched's cid window, partition
constraints, etc. Cmask in arena makes the same logic a lot easier
to express on the BPF side, so I think the right path is building
that infra in BPF rather than extending ext_idle.c.

Thanks.

--
tejun