linux-kernel - [PATCH] sched/fair: Fix decision matrix of type misfit

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Message-Id: <1650787010-8701-1-git-send-email-zgpeng@tencent.com>
Date:   Sun, 24 Apr 2022 15:56:50 +0800
From:   zgpeng <zgpeng.linux@...il.com>
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, linux-kernel@...r.kernel.org
Subject: [PATCH] sched/fair: Fix decision matrix of type misfit_task

When the group type of the busiest is misfit_task, as
long as the type of the local group is not equal to
has_spare, those situation already filtered while
updating statistics.

Signed-off-by: zgpeng <zgpeng@...cent.com>
Reviewed-by: Samuel Liao <samuelliao@...cent.com>
---
 kernel/sched/fair.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index d4bd299..b8c67e7 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -9495,7 +9495,7 @@ static inline void calculate_imbalance(struct lb_env *env, struct sd_lb_stats *s
  * busiest \ local has_spare fully_busy misfit asym imbalanced overloaded
  * has_spare        nr_idle   balanced   N/A    N/A  balanced   balanced
  * fully_busy       nr_idle   nr_idle    N/A    N/A  balanced   balanced
- * misfit_task      force     N/A        N/A    N/A  force      force
+ * misfit_task      force     N/A        N/A    N/A  N/A        N/A
  * asym_packing     force     force      N/A    N/A  force      force
  * imbalanced       force     force      N/A    N/A  force      force
  * overloaded       force     force      N/A    N/A  force      avg_load
-- 
2.9.5