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sched_ext, docs: convert mentions of "CFS" to "fair-class scheduler"

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Mentions of CFS are stale since the fair-class scheduler is implemented using
EEVDF. So, convert such mentions to "fair-class scheduler" to stay
algorithm-name agnostic.

Signed-off-by: Shashank Balaji <shashank.mahadasyam@sony.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Shashank Balaji 2025-05-22 11:08:13 +09:00 committed by Tejun Heo
parent 36adf6fe6c
commit aa3a7b6261
1 changed files with 4 additions and 4 deletions
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8
Documentation/scheduler/sched-ext.rst
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@ -49,8 +49,8 @@ options should be enabled to use sched_ext:
sched_ext is used only when the BPF scheduler is loaded and running.
If a task explicitly sets its scheduling policy to ``SCHED_EXT``, it will be
treated as ``SCHED_NORMAL`` and scheduled by CFS until the BPF scheduler is
loaded.
treated as ``SCHED_NORMAL`` and scheduled by the fair-class scheduler until the
BPF scheduler is loaded.
When the BPF scheduler is loaded and ``SCX_OPS_SWITCH_PARTIAL`` is not set
in ``ops->flags``, all ``SCHED_NORMAL``, ``SCHED_BATCH``, ``SCHED_IDLE``, and
@ -59,11 +59,11 @@ in ``ops->flags``, all ``SCHED_NORMAL``, ``SCHED_BATCH``, ``SCHED_IDLE``, and
However, when the BPF scheduler is loaded and ``SCX_OPS_SWITCH_PARTIAL`` is
set in ``ops->flags``, only tasks with the ``SCHED_EXT`` policy are scheduled
by sched_ext, while tasks with ``SCHED_NORMAL``, ``SCHED_BATCH`` and
``SCHED_IDLE`` policies are scheduled by CFS.
``SCHED_IDLE`` policies are scheduled by the fair-class scheduler.
Terminating the sched_ext scheduler program, triggering `SysRq-S`, or
detection of any internal error including stalled runnable tasks aborts the
BPF scheduler and reverts all tasks back to CFS.
BPF scheduler and reverts all tasks back to the fair-class scheduler.
.. code-block:: none