linux-kernel - [PATCH] sched_ext: Clarify sched_ext

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Message-ID: <20241109022514.173631-1-changwoo@igalia.com>
Date: Sat,  9 Nov 2024 11:25:14 +0900
From: Changwoo Min <multics69@...il.com>
To: tj@...nel.org,
	void@...ifault.com
Cc: changwoo@...lia.com,
	kernel-dev@...lia.com,
	linux-kernel@...r.kernel.org
Subject: [PATCH] sched_ext: Clarify sched_ext_ops table for userland scheduler

Update the comments in sched_ext_ops to clarify this table is for
a BPF scheduler and a userland scheduler should also rely on the
sched_ext_ops table through the BPF scheduler.

Signed-off-by: Changwoo Min <changwoo@...lia.com>
---
 kernel/sched/ext.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c
index 02f39314ef8a..f1a185ab5fbc 100644
--- a/kernel/sched/ext.c
+++ b/kernel/sched/ext.c
@@ -199,8 +199,10 @@ struct scx_dump_ctx {
 /**
  * struct sched_ext_ops - Operation table for BPF scheduler implementation
  *
- * Userland can implement an arbitrary scheduling policy by implementing and
- * loading operations in this table.
+ * A BPF scheduler can implement an arbitrary scheduling policy by
+ * implementing and loading operations in this table. Note that a userland
+ * scheduling policy can also be implemented using the BPF scheduler
+ * as a shim layer.
  */
 struct sched_ext_ops {
 	/**
-- 
2.47.0