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b13772f813
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>
30 lines
775 B
C
30 lines
775 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#define CPUPRI_NR_PRIORITIES (MAX_RT_PRIO+1)
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#define CPUPRI_INVALID -1
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#define CPUPRI_NORMAL 0
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/* values 1-99 are for RT1-RT99 priorities */
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#define CPUPRI_HIGHER 100
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struct cpupri_vec {
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atomic_t count;
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cpumask_var_t mask;
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};
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struct cpupri {
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struct cpupri_vec pri_to_cpu[CPUPRI_NR_PRIORITIES];
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int *cpu_to_pri;
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};
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#ifdef CONFIG_SMP
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int cpupri_find(struct cpupri *cp, struct task_struct *p,
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struct cpumask *lowest_mask);
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int cpupri_find_fitness(struct cpupri *cp, struct task_struct *p,
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struct cpumask *lowest_mask,
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bool (*fitness_fn)(struct task_struct *p, int cpu));
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void cpupri_set(struct cpupri *cp, int cpu, int pri);
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int cpupri_init(struct cpupri *cp);
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void cpupri_cleanup(struct cpupri *cp);
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#endif
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