linux-kernel - [PATCH] sched/fair: change the comment for vruntime

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Message-Id: <20240918022813.4579-1-shijie@os.amperecomputing.com>
Date: Wed, 18 Sep 2024 10:28:13 +0800
From: Huang Shijie <shijie@...amperecomputing.com>
To: mingo@...hat.com,
	peterz@...radead.org,
	juri.lelli@...hat.com
Cc: patches@...erecomputing.com,
	vincent.guittot@...aro.org,
	dietmar.eggemann@....com,
	rostedt@...dmis.org,
	bsegall@...gle.com,
	mgorman@...e.de,
	vschneid@...hat.com,
	linux-kernel@...r.kernel.org,
	Huang Shijie <shijie@...amperecomputing.com>
Subject: [PATCH] sched/fair: change the comment for vruntime_eligible()

Current comment for vruntime_eligible() is confusing.
Change "v" to "v0" to keep align with avg_vruntime_add():
        v0 := cfs_rq->min_vruntime

Signed-off-by: Huang Shijie <shijie@...amperecomputing.com>
---
 kernel/sched/fair.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 92f7cffe8860..9ed51ac2c16b 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -714,11 +714,11 @@ static void update_entity_lag(struct cfs_rq *cfs_rq, struct sched_entity *se)
  *
  * lag_i >= 0 -> V >= v_i
  *
- *     \Sum (v_i - v)*w_i
- * V = ------------------ + v
+ *     \Sum (v_i - v0)*w_i
+ * V = ------------------ + v0
  *          \Sum w_i
  *
- * lag_i >= 0 -> \Sum (v_i - v)*w_i >= (v_i - v)*(\Sum w_i)
+ * lag_i >= 0 -> \Sum (v_i - v0)*w_i >= (v_i - v0)*(\Sum w_i)
  *
  * Note: using 'avg_vruntime() > se->vruntime' is inaccurate due
  *       to the loss in precision caused by the division.
-- 
2.40.1