linux-kernel - [PATCH 1/7] sched/fair: Remove remaining power aware scheduling comments

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Message-Id: <1461958364-675-2-git-send-email-dietmar.eggemann@arm.com>
Date:	Fri, 29 Apr 2016 20:32:38 +0100
From:	Dietmar Eggemann <dietmar.eggemann@....com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	linux-kernel@...r.kernel.org,
	Morten Rasmussen <morten.rasmussen@....com>
Subject: [PATCH 1/7] sched/fair: Remove remaining power aware scheduling comments

Commit 8e7fbcbc22c1 ("sched: Remove stale power aware scheduling remnants
and dysfunctional knobs") deleted the power aware scheduling support.

This patch gets rid of the remaining power aware scheduling comments.

Signed-off-by: Dietmar Eggemann <dietmar.eggemann@....com>
---
 kernel/sched/fair.c | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index b8a33abce650..c77e01b55ec2 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -7025,9 +7025,8 @@ static inline void calculate_imbalance(struct lb_env *env, struct sd_lb_stats *s
 	 * We're trying to get all the cpus to the average_load, so we don't
 	 * want to push ourselves above the average load, nor do we wish to
 	 * reduce the max loaded cpu below the average load. At the same time,
-	 * we also don't want to reduce the group load below the group capacity
-	 * (so that we can implement power-savings policies etc). Thus we look
-	 * for the minimum possible imbalance.
+	 * we also don't want to reduce the group load below the group
+	 * capacity. Thus we look for the minimum possible imbalance.
 	 */
 	max_pull = min(busiest->avg_load - sds->avg_load, load_above_capacity);
 
@@ -7051,10 +7050,7 @@ static inline void calculate_imbalance(struct lb_env *env, struct sd_lb_stats *s
 
 /**
  * find_busiest_group - Returns the busiest group within the sched_domain
- * if there is an imbalance. If there isn't an imbalance, and
- * the user has opted for power-savings, it returns a group whose
- * CPUs can be put to idle by rebalancing those tasks elsewhere, if
- * such a group exists.
+ * if there is an imbalance.
  *
  * Also calculates the amount of weighted load which should be moved
  * to restore balance.
@@ -7062,9 +7058,6 @@ static inline void calculate_imbalance(struct lb_env *env, struct sd_lb_stats *s
  * @env: The load balancing environment.
  *
  * Return:	- The busiest group if imbalance exists.
- *		- If no imbalance and user has opted for power-savings balance,
- *		   return the least loaded group whose CPUs can be
- *		   put to idle by rebalancing its tasks onto our group.
  */
 static struct sched_group *find_busiest_group(struct lb_env *env)
 {
-- 
1.9.1