Re: [PATCH v6 14/16] sched_ext: Export task_is_scx_enabled() for verification

[Gabriele Monaco]

On Wed, 2026-02-25 at 07:08 -1000, Tejun Heo wrote:
> On Wed, Feb 25, 2026 at 10:51:20AM +0100, Gabriele Monaco wrote:
> > When a sched_ext scheduler is loaded, depending on the configuration, it
> > can handle also fair tasks, however it isn't trivial to understand if a
> > certain task is currently handled by fair or ext outside of scheduler
> > code. This can be a problem when writing verification or observability
> > tools like RV monitors.
> > 
> > Export a task_is_scx_enabled() to allow quick classification by using
> > the scx state SCX_TASK_ENABLED.
> 
> This test already exists - task_on_scx(). Please feel free to move that out
> to include/linux/sched/ext.h.

Mmh, right, thanks for the pointer!

I see task_on_scx() is used in what looks like some sched core hot paths (
pick_next_task() -> prio_less()), but I presume not inlining it isn't a big
issue.

Thanks,
Gabriele