linux-stable/kernel/sched/cpupri.h
Peter Zijlstra b13772f813 sched/cpupri: Add CPUPRI_HIGHER
Add CPUPRI_HIGHER above the RT99 priority to denote the CPU is in use
by higher priority tasks (specifically deadline).

XXX: we should probably drive PUSH-PULL from cpupri, that would
automagically result in an RT-PUSH when DL sets cpupri to CPUPRI_HIGHER.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
2020-10-29 11:00:30 +01:00

29 lines
775 B
C

/* SPDX-License-Identifier: GPL-2.0 */
#define CPUPRI_NR_PRIORITIES (MAX_RT_PRIO+1)
#define CPUPRI_INVALID -1
#define CPUPRI_NORMAL 0
/* values 1-99 are for RT1-RT99 priorities */
#define CPUPRI_HIGHER 100
struct cpupri_vec {
atomic_t count;
cpumask_var_t mask;
};
struct cpupri {
struct cpupri_vec pri_to_cpu[CPUPRI_NR_PRIORITIES];
int *cpu_to_pri;
};
#ifdef CONFIG_SMP
int cpupri_find(struct cpupri *cp, struct task_struct *p,
struct cpumask *lowest_mask);
int cpupri_find_fitness(struct cpupri *cp, struct task_struct *p,
struct cpumask *lowest_mask,
bool (*fitness_fn)(struct task_struct *p, int cpu));
void cpupri_set(struct cpupri *cp, int cpu, int pri);
int cpupri_init(struct cpupri *cp);
void cpupri_cleanup(struct cpupri *cp);
#endif