178634061SFrederic Weisbecker #ifndef _LINUX_SCHED_ISOLATION_H 278634061SFrederic Weisbecker #define _LINUX_SCHED_ISOLATION_H 378634061SFrederic Weisbecker 478634061SFrederic Weisbecker #include <linux/cpumask.h> 578634061SFrederic Weisbecker #include <linux/init.h> 678634061SFrederic Weisbecker #include <linux/tick.h> 778634061SFrederic Weisbecker 878634061SFrederic Weisbecker #ifdef CONFIG_NO_HZ_FULL 978634061SFrederic Weisbecker extern cpumask_var_t housekeeping_mask; 1078634061SFrederic Weisbecker extern void __init housekeeping_init(void); 1178634061SFrederic Weisbecker #else 1278634061SFrederic Weisbecker static inline void housekeeping_init(void) { } 1378634061SFrederic Weisbecker #endif /* CONFIG_NO_HZ_FULL */ 1478634061SFrederic Weisbecker 15*9f0ca2d9SFrederic Weisbecker static inline int housekeeping_any_cpu(void) 16*9f0ca2d9SFrederic Weisbecker { 17*9f0ca2d9SFrederic Weisbecker #ifdef CONFIG_NO_HZ_FULL 18*9f0ca2d9SFrederic Weisbecker if (tick_nohz_full_enabled()) 19*9f0ca2d9SFrederic Weisbecker return cpumask_any_and(housekeeping_mask, cpu_online_mask); 20*9f0ca2d9SFrederic Weisbecker #endif 21*9f0ca2d9SFrederic Weisbecker return smp_processor_id(); 22*9f0ca2d9SFrederic Weisbecker } 2378634061SFrederic Weisbecker 2478634061SFrederic Weisbecker static inline const struct cpumask *housekeeping_cpumask(void) 2578634061SFrederic Weisbecker { 2678634061SFrederic Weisbecker #ifdef CONFIG_NO_HZ_FULL 2778634061SFrederic Weisbecker if (tick_nohz_full_enabled()) 2878634061SFrederic Weisbecker return housekeeping_mask; 2978634061SFrederic Weisbecker #endif 3078634061SFrederic Weisbecker return cpu_possible_mask; 3178634061SFrederic Weisbecker } 3278634061SFrederic Weisbecker 3378634061SFrederic Weisbecker static inline bool is_housekeeping_cpu(int cpu) 3478634061SFrederic Weisbecker { 3578634061SFrederic Weisbecker #ifdef CONFIG_NO_HZ_FULL 3678634061SFrederic Weisbecker if (tick_nohz_full_enabled()) 3778634061SFrederic Weisbecker return cpumask_test_cpu(cpu, housekeeping_mask); 3878634061SFrederic Weisbecker #endif 3978634061SFrederic Weisbecker return true; 4078634061SFrederic Weisbecker } 4178634061SFrederic Weisbecker 4278634061SFrederic Weisbecker static inline void housekeeping_affine(struct task_struct *t) 4378634061SFrederic Weisbecker { 4478634061SFrederic Weisbecker #ifdef CONFIG_NO_HZ_FULL 4578634061SFrederic Weisbecker if (tick_nohz_full_enabled()) 4678634061SFrederic Weisbecker set_cpus_allowed_ptr(t, housekeeping_mask); 4778634061SFrederic Weisbecker 4878634061SFrederic Weisbecker #endif 4978634061SFrederic Weisbecker } 5078634061SFrederic Weisbecker 5178634061SFrederic Weisbecker #endif /* _LINUX_SCHED_ISOLATION_H */ 52