Per cpu variable 'select_idle_mask' serves the only purpose of an iterator
inside select_idle_core method. Also there is an opportunity to optimize
the search for an idle CPU for which this mask is required in the
subsequent patch. Hence renaming this per_cpu variable to iterator mask
which can be used locally for CPU iteration.
Subsequent patch uses the select_idle_mask to keep track of the idle CPUs
which can be shared across function calls.
Signed-off-by: Parth Shah <pa...@linux.ibm.com>
---
kernel/sched/core.c | 4 ++--
kernel/sched/fair.c | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 4778c48a7fda..d5a6bdc956c8 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -5950,7 +5950,7 @@ 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, iterator_mask);
void __init sched_init(void)
{
@@ -5989,7 +5989,7 @@ 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(iterator_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 fdab7eb6f351..20affe03379d 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5294,7 +5294,7 @@ 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, iterator_mask);
#ifdef CONFIG_NO_HZ_COMMON
/*
@@ -6083,7 +6083,7 @@ void __update_idle_core(struct rq *rq)
*/
static int select_idle_core(struct task_struct *p, struct sched_domain *sd,
int target)
{
- struct cpumask *cpus = this_cpu_cpumask_var_ptr(select_idle_mask);
+ struct cpumask *cpus = this_cpu_cpumask_var_ptr(iterator_mask);
int core, cpu;
if (!static_branch_likely(&sched_smt_present))
--
2.17.1
