89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
#ifndef _LINUX_SCHED_ISOLATION_H
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#define _LINUX_SCHED_ISOLATION_H
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#include <linux/cpumask.h>
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#include <linux/init.h>
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#include <linux/tick.h>
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enum hk_type {
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/* Inverse of boot-time isolcpus= argument */
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HK_TYPE_DOMAIN_BOOT,
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/*
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* Same as HK_TYPE_DOMAIN_BOOT but also includes the
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* inverse of cpuset isolated partitions. As such it
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* is always a subset of HK_TYPE_DOMAIN_BOOT.
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*/
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HK_TYPE_DOMAIN,
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/* Inverse of boot-time isolcpus=managed_irq argument */
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HK_TYPE_MANAGED_IRQ,
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/* Inverse of boot-time nohz_full= or isolcpus=nohz arguments */
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HK_TYPE_KERNEL_NOISE,
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HK_TYPE_MAX,
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/*
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* The following housekeeping types are only set by the nohz_full
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* boot commandline option. So they can share the same value.
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*/
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HK_TYPE_TICK = HK_TYPE_KERNEL_NOISE,
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HK_TYPE_TIMER = HK_TYPE_KERNEL_NOISE,
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HK_TYPE_RCU = HK_TYPE_KERNEL_NOISE,
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HK_TYPE_MISC = HK_TYPE_KERNEL_NOISE,
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HK_TYPE_WQ = HK_TYPE_KERNEL_NOISE,
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HK_TYPE_KTHREAD = HK_TYPE_KERNEL_NOISE
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};
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#ifdef CONFIG_CPU_ISOLATION
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DECLARE_STATIC_KEY_FALSE(housekeeping_overridden);
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extern int housekeeping_any_cpu(enum hk_type type);
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extern const struct cpumask *housekeeping_cpumask(enum hk_type type);
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extern bool housekeeping_enabled(enum hk_type type);
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extern void housekeeping_affine(struct task_struct *t, enum hk_type type);
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extern bool housekeeping_test_cpu(int cpu, enum hk_type type);
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extern int housekeeping_update(struct cpumask *isol_mask);
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extern void __init housekeeping_init(void);
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#else
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static inline int housekeeping_any_cpu(enum hk_type type)
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{
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return smp_processor_id();
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}
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static inline const struct cpumask *housekeeping_cpumask(enum hk_type type)
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{
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return cpu_possible_mask;
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}
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static inline bool housekeeping_enabled(enum hk_type type)
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{
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return false;
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}
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static inline void housekeeping_affine(struct task_struct *t,
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enum hk_type type) { }
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static inline bool housekeeping_test_cpu(int cpu, enum hk_type type)
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{
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return true;
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}
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static inline int housekeeping_update(struct cpumask *isol_mask) { return 0; }
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static inline void housekeeping_init(void) { }
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#endif /* CONFIG_CPU_ISOLATION */
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static inline bool housekeeping_cpu(int cpu, enum hk_type type)
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{
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#ifdef CONFIG_CPU_ISOLATION
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if (static_branch_unlikely(&housekeeping_overridden))
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return housekeeping_test_cpu(cpu, type);
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#endif
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return true;
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}
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static inline bool cpu_is_isolated(int cpu)
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{
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return !housekeeping_test_cpu(cpu, HK_TYPE_DOMAIN);
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}
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#endif /* _LINUX_SCHED_ISOLATION_H */
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