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sched: Make multiple runqueue task counters 32-bit

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Make:

	struct dl_rq::dl_nr_migratory
	struct dl_rq::dl_nr_running

	struct rt_rq::rt_nr_boosted
	struct rt_rq::rt_nr_migratory
	struct rt_rq::rt_nr_total

	struct rq::nr_uninterruptible

32-bit.

If total number of tasks can't exceed 2**32 (and less due to futex pid
limits), then per-runqueue counters can't as well.

This patchset has been sponsored by REX Prefix Eradication Society.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20210422200228.1423391-4-adobriyan@gmail.com
This commit is contained in:
Alexey Dobriyan 2021-04-22 23:02:28 +03:00 committed by Ingo Molnar
parent 8fc2858e57
commit e6fe3f422b
2 changed files with 7 additions and 7 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

2
kernel/sched/loadavg.c
View file

@ -81,7 +81,7 @@ long calc_load_fold_active(struct rq *this_rq, long adjust)
long nr_active, delta = 0;
nr_active = this_rq->nr_running - adjust;
nr_active += (long)this_rq->nr_uninterruptible;
nr_active += (int)this_rq->nr_uninterruptible;
if (nr_active != this_rq->calc_load_active) {
delta = nr_active - this_rq->calc_load_active;

12
kernel/sched/sched.h
View file

@ -636,8 +636,8 @@ struct rt_rq {
} highest_prio;
#endif
#ifdef CONFIG_SMP
unsigned long rt_nr_migratory;
unsigned long rt_nr_total;
unsigned int rt_nr_migratory;
unsigned int rt_nr_total;
int overloaded;
struct plist_head pushable_tasks;
@ -651,7 +651,7 @@ struct rt_rq {
raw_spinlock_t rt_runtime_lock;
#ifdef CONFIG_RT_GROUP_SCHED
unsigned long rt_nr_boosted;
unsigned int rt_nr_boosted;
struct rq *rq;
struct task_group *tg;
@ -668,7 +668,7 @@ struct dl_rq {
/* runqueue is an rbtree, ordered by deadline */
struct rb_root_cached root;
unsigned long dl_nr_running;
unsigned int dl_nr_running;
#ifdef CONFIG_SMP
/*
@ -682,7 +682,7 @@ struct dl_rq {
u64 next;
} earliest_dl;
unsigned long dl_nr_migratory;
unsigned int dl_nr_migratory;
int overloaded;
/*
@ -960,7 +960,7 @@ struct rq {
* one CPU and if it got migrated afterwards it may decrease
* it on another CPU. Always updated under the runqueue lock:
*/
unsigned long nr_uninterruptible;
unsigned int nr_uninterruptible;
struct task_struct __rcu *curr;
struct task_struct *idle;