linux-kernel - [PATCH v3 2/3] sched_ext, docs: convert mentions of "CFS" to "fair-class scheduler"

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Message-Id: <20250522-rt-and-cpu-controller-doc-v3-2-483fc9cca591@sony.com>
Date: Thu, 22 May 2025 11:08:13 +0900
From: Shashank Balaji <shashank.mahadasyam@...y.com>
To: Tejun Heo <tj@...nel.org>, Johannes Weiner <hannes@...xchg.org>, 
 Michal Koutný <mkoutny@...e.com>, 
 Jonathan Corbet <corbet@....net>
Cc: cgroups@...r.kernel.org, linux-doc@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Shinya Takumi <shinya.takumi@...y.com>, 
 Shashank Balaji <shashank.mahadasyam@...y.com>
Subject: [PATCH v3 2/3] sched_ext, docs: convert mentions of "CFS" to
 "fair-class scheduler"

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@...y.com>
---
 Documentation/scheduler/sched-ext.rst | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Documentation/scheduler/sched-ext.rst b/Documentation/scheduler/sched-ext.rst
index 0b2654e2164b8e6139db19fc8b68e6c5c289503d..ceca6f8966eeeb5f029a9ae41c039d67c1db7be8 100644
--- a/Documentation/scheduler/sched-ext.rst
+++ b/Documentation/scheduler/sched-ext.rst
@@ -47,8 +47,8 @@ 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
@@ -57,11 +57,11 @@ 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
 

-- 
2.43.0