include/linux/sched/numa_balancing.h

   1 #ifndef _LINUX_SCHED_NUMA_BALANCING_H
   2 #define _LINUX_SCHED_NUMA_BALANCING_H
   3
   4 /*
   5  * This is the interface between the scheduler and the MM that
   6  * implements memory access pattern based NUMA-balancing:
   7  */
   8
   9 #include <linux/sched.h>
  10
  11 #define TNF_MIGRATED    0x01
  12 #define TNF_NO_GROUP    0x02
  13 #define TNF_SHARED      0x04
  14 #define TNF_FAULT_LOCAL 0x08
  15 #define TNF_MIGRATE_FAIL 0x10
  16
  17 #ifdef CONFIG_NUMA_BALANCING
  18 extern void task_numa_fault(int last_node, int node, int pages, int flags);
  19 extern pid_t task_numa_group_id(struct task_struct *p);
  20 extern void set_numabalancing_state(bool enabled);
  21 extern void task_numa_free(struct task_struct *p);
  22 extern bool should_numa_migrate_memory(struct task_struct *p, struct page *page,
  23                                         int src_nid, int dst_cpu);
  24 #else
  25 static inline void task_numa_fault(int last_node, int node, int pages,
  26                                    int flags)
  27 {
  28 }
  29 static inline pid_t task_numa_group_id(struct task_struct *p)
  30 {
  31         return 0;
  32 }
  33 static inline void set_numabalancing_state(bool enabled)
  34 {
  35 }
  36 static inline void task_numa_free(struct task_struct *p)
  37 {
  38 }
  39 static inline bool should_numa_migrate_memory(struct task_struct *p,
  40                                 struct page *page, int src_nid, int dst_cpu)
  41 {
  42         return true;
  43 }
  44 #endif
  45
  46 #endif /* _LINUX_SCHED_NUMA_BALANCING_H */