lkml.org 
[lkml]   [2021]   [Feb]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH 5/5] sched: make multiple runqueue task counters 32-bit
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>
---

kernel/sched/loadavg.c | 2 +-
kernel/sched/sched.h | 12 ++++++------
2 files changed, 7 insertions(+), 7 deletions(-)

--- a/kernel/sched/loadavg.c
+++ b/kernel/sched/loadavg.c
@@ -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;
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -622,8 +622,8 @@ 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;

@@ -637,7 +637,7 @@ 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;
@@ -654,7 +654,7 @@ 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
/*
@@ -668,7 +668,7 @@ struct dl_rq {
u64 next;
} earliest_dl;

- unsigned long dl_nr_migratory;
+ unsigned int dl_nr_migratory;
int overloaded;

/*
@@ -946,7 +946,7 @@ 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;
\
 
 \ /
  Last update: 2021-02-06 16:32    [W:0.075 / U:1.764 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site