sched_ext: Introduce scx_task_sched[_rcu]()

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In preparation of multiple scheduler support, add p->scx.sched which points
to the scx_sched instance that the task is scheduled by, which is currently
always scx_root. Add scx_task_sched[_rcu]() accessors which return the
associated scx_sched of the specified task and replace the raw scx_root
dereferences with it where applicable. scx_task_on_sched() is also added to
test whether a given task is on the specified sched.

As scx_root is still the only scheduler, this shouldn't introduce
user-visible behavior changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Andrea Righi <arighi@nvidia.com>

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Tejun Heo 2026-03-06 07:58:03 -10:00

parent ebeca1f930

commit 88234b075c

3 changed files with 105 additions and 24 deletions

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7

include/linux/sched/ext.h

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63

kernel/sched/ext.c

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59

kernel/sched/ext_internal.h

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