| Frederic Weisbecker | 7863406 | 2017-10-27 04:42:28 +0200 | [diff] [blame] | 1 | #ifndef _LINUX_SCHED_ISOLATION_H |
| 2 | #define _LINUX_SCHED_ISOLATION_H |
| 3 | |
| 4 | #include <linux/cpumask.h> |
| 5 | #include <linux/init.h> |
| 6 | #include <linux/tick.h> |
| 7 | |
| 8 | #ifdef CONFIG_NO_HZ_FULL |
| 9 | extern cpumask_var_t housekeeping_mask; |
| Frederic Weisbecker | 7863406 | 2017-10-27 04:42:28 +0200 | [diff] [blame] | 10 | extern void __init housekeeping_init(void); |
| Frederic Weisbecker | 7863406 | 2017-10-27 04:42:28 +0200 | [diff] [blame] | 11 | #else |
| Frederic Weisbecker | 7863406 | 2017-10-27 04:42:28 +0200 | [diff] [blame] | 12 | static inline void housekeeping_init(void) { } |
| 13 | #endif /* CONFIG_NO_HZ_FULL */ |
| 14 | |
| Frederic Weisbecker | 9f0ca2d | 2017-10-27 04:42:30 +0200 | [diff] [blame^] | 15 | static inline int housekeeping_any_cpu(void) |
| 16 | { |
| 17 | #ifdef CONFIG_NO_HZ_FULL |
| 18 | if (tick_nohz_full_enabled()) |
| 19 | return cpumask_any_and(housekeeping_mask, cpu_online_mask); |
| 20 | #endif |
| 21 | return smp_processor_id(); |
| 22 | } |
| Frederic Weisbecker | 7863406 | 2017-10-27 04:42:28 +0200 | [diff] [blame] | 23 | |
| 24 | static inline const struct cpumask *housekeeping_cpumask(void) |
| 25 | { |
| 26 | #ifdef CONFIG_NO_HZ_FULL |
| 27 | if (tick_nohz_full_enabled()) |
| 28 | return housekeeping_mask; |
| 29 | #endif |
| 30 | return cpu_possible_mask; |
| 31 | } |
| 32 | |
| 33 | static inline bool is_housekeeping_cpu(int cpu) |
| 34 | { |
| 35 | #ifdef CONFIG_NO_HZ_FULL |
| 36 | if (tick_nohz_full_enabled()) |
| 37 | return cpumask_test_cpu(cpu, housekeeping_mask); |
| 38 | #endif |
| 39 | return true; |
| 40 | } |
| 41 | |
| 42 | static inline void housekeeping_affine(struct task_struct *t) |
| 43 | { |
| 44 | #ifdef CONFIG_NO_HZ_FULL |
| 45 | if (tick_nohz_full_enabled()) |
| 46 | set_cpus_allowed_ptr(t, housekeeping_mask); |
| 47 | |
| 48 | #endif |
| 49 | } |
| 50 | |
| 51 | #endif /* _LINUX_SCHED_ISOLATION_H */ |