Re: [PATCH] sched/fair: Force idle aware load balancing

[Peter Zijlstra]

On Thu, Nov 27, 2025 at 10:27:17PM +0200, Fernand Sieber wrote:

> @@ -11123,7 +11136,8 @@ static inline void calculate_imbalance(struct lb_env *env, struct sd_lb_stats *s
>  		return;
>  	}
>  
> -	if (busiest->group_type == group_smt_balance) {
> +	if (busiest->group_type == group_smt_balance ||
> +	    busiest->forceidle_weight) {

Should we not instead make it so that we select group_smt_balance in
this case?

Anyway, the patch doesn't seem horrible to me. Vincent?

>  		/* Reduce number of tasks sharing CPU capacity */
>  		env->migration_type = migrate_task;
>  		env->imbalance = 1;