Re: [PATCH v10 3/5] sched: Enforce user requested affinity

[Peter Zijlstra]

On Thu, Sep 22, 2022 at 02:00:39PM -0400, Waiman Long wrote:
> @@ -9647,6 +9656,9 @@ void __init sched_init(void)
>  			cpumask_size(), GFP_KERNEL, cpu_to_node(i));
>  		per_cpu(select_rq_mask, i) = (cpumask_var_t)kzalloc_node(
>  			cpumask_size(), GFP_KERNEL, cpu_to_node(i));
> +		per_cpu(runqueues.scratch_mask, i) =
> +			(cpumask_var_t)kzalloc_node(cpumask_size(),
> +						    GFP_KERNEL, cpu_to_node(i));
>  	}
>  #endif /* CONFIG_CPUMASK_OFFSTACK */
>  

That doesn't actually apply; I've made it:

--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -9748,6 +9748,7 @@ void __init sched_init(void)
 
 		rq->core_cookie = 0UL;
 #endif
+		zalloc_cpumask_var_node(&per_cpu(runqueues.scratch_mask, i), GFP_KERNEL, cpu_to_node(i));
 	}
 
 	set_load_weight(&init_task, false);