[PATCH] sched/fair: Fix update of rd->sg_overutilized

[PATCH] sched/fair: Fix update of rd->sg_overutilized

[Vincent Guittot]

sg_overloaded is used instead of sg_overutilized to update
rd->sg_overutilized.

Fixes: 4475cd8bfd9b ("sched/balancing: Simplify the sg_status bitmask and use separate ->overloaded and ->overutilized flags")
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
---
 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 1dd37168da50..bb1ae4ed0d91 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -10661,7 +10661,7 @@ static inline void update_sd_lb_stats(struct lb_env *env, struct sd_lb_stats *sd
 		set_rd_overloaded(env->dst_rq->rd, sg_overloaded);
 
 		/* Update over-utilization (tipping point, U >= 0) indicator */
-		set_rd_overutilized(env->dst_rq->rd, sg_overloaded);
+		set_rd_overutilized(env->dst_rq->rd, sg_overutilized);
 	} else if (sg_overutilized) {
 		set_rd_overutilized(env->dst_rq->rd, sg_overutilized);
 	}
-- 
2.34.1

Re: [PATCH] sched/fair: Fix update of rd->sg_overutilized

[Shrikanth Hegde]

On 4/4/24 9:27 PM, Vincent Guittot wrote:
> sg_overloaded is used instead of sg_overutilized to update
> rd->sg_overutilized.

Yes. Good find. I missed to notice this as well.

> 
> Fixes: 4475cd8bfd9b ("sched/balancing: Simplify the sg_status bitmask and use separate ->overloaded and ->overutilized flags")
> Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
> ---
>  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 1dd37168da50..bb1ae4ed0d91 100644
> --- a/kernel/sched/fair.c
> +++ b/kernel/sched/fair.c
> @@ -10661,7 +10661,7 @@ static inline void update_sd_lb_stats(struct lb_env *env, struct sd_lb_stats *sd
>  		set_rd_overloaded(env->dst_rq->rd, sg_overloaded);
>  
>  		/* Update over-utilization (tipping point, U >= 0) indicator */
> -		set_rd_overutilized(env->dst_rq->rd, sg_overloaded);
> +		set_rd_overutilized(env->dst_rq->rd, sg_overutilized);
>  	} else if (sg_overutilized) {
>  		set_rd_overutilized(env->dst_rq->rd, sg_overutilized);
>  	}

Reviewed-by: Shrikanth Hegde <sshegde@linux.ibm.com>

[tip: sched/core] sched/fair: Fix update of rd->sg_overutilized

[tip-bot2 for Vincent Guittot]

The following commit has been merged into the sched/core branch of tip:

Commit-ID:     cd18bec668bb6221a54f03d0b645b7aed841f825
Gitweb:        https://git.kernel.org/tip/cd18bec668bb6221a54f03d0b645b7aed841f825
Author:        Vincent Guittot <vincent.guittot@linaro.org>
AuthorDate:    Thu, 04 Apr 2024 17:57:38 +02:00
Committer:     Ingo Molnar <mingo@kernel.org>
CommitterDate: Wed, 24 Apr 2024 12:02:51 +02:00

sched/fair: Fix update of rd->sg_overutilized

sg_overloaded is used instead of sg_overutilized to update
rd->sg_overutilized.

Fixes: 4475cd8bfd9b ("sched/balancing: Simplify the sg_status bitmask and use separate ->overloaded and ->overutilized flags")
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20240404155738.2866102-1-vincent.guittot@linaro.org
---
 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 1dd3716..bb1ae4e 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -10661,7 +10661,7 @@ static inline void update_sd_lb_stats(struct lb_env *env, struct sd_lb_stats *sd
 		set_rd_overloaded(env->dst_rq->rd, sg_overloaded);
 
 		/* Update over-utilization (tipping point, U >= 0) indicator */
-		set_rd_overutilized(env->dst_rq->rd, sg_overloaded);
+		set_rd_overutilized(env->dst_rq->rd, sg_overutilized);
 	} else if (sg_overutilized) {
 		set_rd_overutilized(env->dst_rq->rd, sg_overutilized);
 	}