[PATCH v2 4/7] sched/fair: Rename select_idle_mask to select_rq_mask

From: Vincent Donnefort
Date: Wed Jan 12 2022 - 11:16:10 EST


From: Dietmar Eggemann <dietmar.eggemann@xxxxxxx>

Decouple the name of the per-cpu cpumask select_idle_mask from its usage
in select_idle_[cpu/capacity]() of the CFS run-queue selection
(select_task_rq_fair()).

This is to support the reuse of this cpumask in the Energy Aware
Scheduling (EAS) path (find_energy_efficient_cpu()) of the CFS run-queue
selection.

Signed-off-by: Dietmar Eggemann <dietmar.eggemann@xxxxxxx>

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 668ffae1888e..9808f3f33417 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -9305,7 +9305,7 @@ static struct kmem_cache *task_group_cache __read_mostly;
#endif

DECLARE_PER_CPU(cpumask_var_t, load_balance_mask);
-DECLARE_PER_CPU(cpumask_var_t, select_idle_mask);
+DECLARE_PER_CPU(cpumask_var_t, select_rq_mask);

void __init sched_init(void)
{
@@ -9354,7 +9354,7 @@ void __init sched_init(void)
for_each_possible_cpu(i) {
per_cpu(load_balance_mask, i) = (cpumask_var_t)kzalloc_node(
cpumask_size(), GFP_KERNEL, cpu_to_node(i));
- per_cpu(select_idle_mask, i) = (cpumask_var_t)kzalloc_node(
+ per_cpu(select_rq_mask, i) = (cpumask_var_t)kzalloc_node(
cpumask_size(), GFP_KERNEL, cpu_to_node(i));
}
#endif /* CONFIG_CPUMASK_OFFSTACK */
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 4fc63deda620..291be5c00044 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5709,7 +5709,7 @@ static void dequeue_task_fair(struct rq *rq, struct task_struct *p, int flags)

/* Working cpumask for: load_balance, load_balance_newidle. */
DEFINE_PER_CPU(cpumask_var_t, load_balance_mask);
-DEFINE_PER_CPU(cpumask_var_t, select_idle_mask);
+DEFINE_PER_CPU(cpumask_var_t, select_rq_mask);

#ifdef CONFIG_NO_HZ_COMMON

@@ -6199,7 +6199,7 @@ static inline int select_idle_smt(struct task_struct *p, struct sched_domain *sd
*/
static int select_idle_cpu(struct task_struct *p, struct sched_domain *sd, bool has_idle_core, int target)
{
- struct cpumask *cpus = this_cpu_cpumask_var_ptr(select_idle_mask);
+ struct cpumask *cpus = this_cpu_cpumask_var_ptr(select_rq_mask);
int i, cpu, idle_cpu = -1, nr = INT_MAX;
struct rq *this_rq = this_rq();
int this = smp_processor_id();
@@ -6285,7 +6285,7 @@ select_idle_capacity(struct task_struct *p, struct sched_domain *sd, int target)
int cpu, best_cpu = -1;
struct cpumask *cpus;

- cpus = this_cpu_cpumask_var_ptr(select_idle_mask);
+ cpus = this_cpu_cpumask_var_ptr(select_rq_mask);
cpumask_and(cpus, sched_domain_span(sd), p->cpus_ptr);

task_util = uclamp_task_util(p);
--
2.25.1