linux-kernel - [RFC][PATCH 01/10] sched/eevdf: Add feature comments

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Date: Fri, 05 Apr 2024 12:27:55 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: mingo@...hat.com,
 peterz@...radead.org,
 juri.lelli@...hat.com,
 vincent.guittot@...aro.org,
 dietmar.eggemann@....com,
 rostedt@...dmis.org,
 bsegall@...gle.com,
 mgorman@...e.de,
 bristot@...hat.com,
 vschneid@...hat.com,
 linux-kernel@...r.kernel.org
Cc: kprateek.nayak@....com,
 wuyun.abel@...edance.com,
 tglx@...utronix.de,
 efault@....de
Subject: [RFC][PATCH 01/10] sched/eevdf: Add feature comments


Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
---
 kernel/sched/features.h |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/kernel/sched/features.h
+++ b/kernel/sched/features.h
@@ -5,7 +5,14 @@
  * sleep+wake cycles. EEVDF placement strategy #1, #2 if disabled.
  */
 SCHED_FEAT(PLACE_LAG, true)
+/*
+ * Give new tasks half a slice to ease into the competition.
+ */
 SCHED_FEAT(PLACE_DEADLINE_INITIAL, true)
+/*
+ * Inhibit (wakeup) preemption until the current task has either matched the
+ * 0-lag point or until is has exhausted it's slice.
+ */
 SCHED_FEAT(RUN_TO_PARITY, true)
 
 /*