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sched/fair: Encapsulate set custom slice in a __setparam_fair() function

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Similarly to dl, create a __setparam_fair() function to set parameters
related to fair class and move it in the fair.c file.

No functional changes expected

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Phil Auld <pauld@redhat.com>
Link: https://lore.kernel.org/r/20250110144656.484601-1-vincent.guittot@linaro.org
This commit is contained in:
Vincent Guittot 2025-01-11 10:14:09 +01:00 committed by Peter Zijlstra
parent 5d808c78d9
commit 2cf9ac4007
3 changed files with 24 additions and 13 deletions
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19
kernel/sched/fair.c
View File

@ -37,6 +37,7 @@
#include <linux/sched/cputime.h>
#include <linux/sched/isolation.h>
#include <linux/sched/nohz.h>
#include <linux/sched/prio.h>
#include <linux/cpuidle.h>
#include <linux/interrupt.h>
@ -51,6 +52,8 @@
#include <asm/switch_to.h>
#include <uapi/linux/sched/types.h>
#include "sched.h"
#include "stats.h"
#include "autogroup.h"
@ -5258,6 +5261,22 @@ static inline void update_misfit_status(struct task_struct *p, struct rq *rq) {}
#endif /* CONFIG_SMP */
void __setparam_fair(struct task_struct *p, const struct sched_attr *attr)
{
struct sched_entity *se = &p->se;
p->static_prio = NICE_TO_PRIO(attr->sched_nice);
if (attr->sched_runtime) {
se->custom_slice = 1;
se->slice = clamp_t(u64, attr->sched_runtime,
NSEC_PER_MSEC/10, /* HZ=1000 * 10 */
NSEC_PER_MSEC*100); /* HZ=100 / 10 */
} else {
se->custom_slice = 0;
se->slice = sysctl_sched_base_slice;
}
}
static void
place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int flags)
{

2
kernel/sched/sched.h
View File

@ -3500,6 +3500,8 @@ unsigned long scale_irq_capacity(unsigned long util, unsigned long irq, unsigned
#endif /* !CONFIG_HAVE_SCHED_AVG_IRQ */
extern void __setparam_fair(struct task_struct *p, const struct sched_attr *attr);
#if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
#define perf_domain_span(pd) (to_cpumask(((pd)->em_pd->cpus)))

16
kernel/sched/syscalls.c
View File

@ -300,20 +300,10 @@ static void __setscheduler_params(struct task_struct *p,
p->policy = policy;
if (dl_policy(policy)) {
if (dl_policy(policy))
__setparam_dl(p, attr);
} else if (fair_policy(policy)) {
p->static_prio = NICE_TO_PRIO(attr->sched_nice);
if (attr->sched_runtime) {
p->se.custom_slice = 1;
p->se.slice = clamp_t(u64, attr->sched_runtime,
NSEC_PER_MSEC/10, /* HZ=1000 * 10 */
NSEC_PER_MSEC*100); /* HZ=100 / 10 */
} else {
p->se.custom_slice = 0;
p->se.slice = sysctl_sched_base_slice;
}
}
else if (fair_policy(policy))
__setparam_fair(p, attr);
/* rt-policy tasks do not have a timerslack */
if (rt_or_dl_task_policy(p)) {