include/linux/cpuset.h

   1 #ifndef _LINUX_CPUSET_H
   2 #define _LINUX_CPUSET_H
   3 /*
   4  *  cpuset interface
   5  *
   6  *  Copyright (C) 2003 BULL SA
   7  *  Copyright (C) 2004-2006 Silicon Graphics, Inc.
   8  *
   9  */
  10
  11 #include <linux/sched.h>
  12 #include <linux/cpumask.h>
  13 #include <linux/nodemask.h>
  14 #include <linux/cgroup.h>
  15
  16 #ifdef CONFIG_CPUSETS
  17
  18 extern int number_of_cpusets;   /* How many cpusets are defined in system? */
  19
  20 extern int cpuset_init_early(void);
  21 extern int cpuset_init(void);
  22 extern void cpuset_init_smp(void);
  23 extern void cpuset_cpus_allowed(struct task_struct *p, cpumask_t *mask);
  24 extern void cpuset_cpus_allowed_locked(struct task_struct *p, cpumask_t *mask);
  25 extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
  26 #define cpuset_current_mems_allowed (current->mems_allowed)
  27 void cpuset_init_current_mems_allowed(void);
  28 void cpuset_update_task_memory_state(void);
  29 int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask);
  30
  31 extern int __cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask);
  32 extern int __cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask);
  33
  34 static int inline cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
  35 {
  36         return number_of_cpusets <= 1 ||
  37                 __cpuset_zone_allowed_softwall(z, gfp_mask);
  38 }
  39
  40 static int inline cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
  41 {
  42         return number_of_cpusets <= 1 ||
  43                 __cpuset_zone_allowed_hardwall(z, gfp_mask);
  44 }
  45
  46 extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
  47                                           const struct task_struct *tsk2);
  48
  49 #define cpuset_memory_pressure_bump()                           \
  50         do {                                                    \
  51                 if (cpuset_memory_pressure_enabled)             \
  52                         __cpuset_memory_pressure_bump();        \
  53         } while (0)
  54 extern int cpuset_memory_pressure_enabled;
  55 extern void __cpuset_memory_pressure_bump(void);
  56
  57 extern const struct file_operations proc_cpuset_operations;
  58 struct seq_file;
  59 extern void cpuset_task_status_allowed(struct seq_file *m,
  60                                         struct task_struct *task);
  61
  62 extern void cpuset_lock(void);
  63 extern void cpuset_unlock(void);
  64
  65 extern int cpuset_mem_spread_node(void);
  66
  67 static inline int cpuset_do_page_mem_spread(void)
  68 {
  69         return current->flags & PF_SPREAD_PAGE;
  70 }
  71
  72 static inline int cpuset_do_slab_mem_spread(void)
  73 {
  74         return current->flags & PF_SPREAD_SLAB;
  75 }
  76
  77 extern void cpuset_track_online_nodes(void);
  78
  79 extern int current_cpuset_is_being_rebound(void);
  80
  81 extern void rebuild_sched_domains(void);
  82
  83 #else /* !CONFIG_CPUSETS */
  84
  85 static inline int cpuset_init_early(void) { return 0; }
  86 static inline int cpuset_init(void) { return 0; }
  87 static inline void cpuset_init_smp(void) {}
  88
  89 static inline void cpuset_cpus_allowed(struct task_struct *p, cpumask_t *mask)
  90 {
  91         *mask = cpu_possible_map;
  92 }
  93 static inline void cpuset_cpus_allowed_locked(struct task_struct *p,
  94                                                                 cpumask_t *mask)
  95 {
  96         *mask = cpu_possible_map;
  97 }
  98
  99 static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
 100 {
 101         return node_possible_map;
 102 }
 103
 104 #define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
 105 static inline void cpuset_init_current_mems_allowed(void) {}
 106 static inline void cpuset_update_task_memory_state(void) {}
 107
 108 static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask)
 109 {
 110         return 1;
 111 }
 112
 113 static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
 114 {
 115         return 1;
 116 }
 117
 118 static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
 119 {
 120         return 1;
 121 }
 122
 123 static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
 124                                                  const struct task_struct *tsk2)
 125 {
 126         return 1;
 127 }
 128
 129 static inline void cpuset_memory_pressure_bump(void) {}
 130
 131 static inline void cpuset_task_status_allowed(struct seq_file *m,
 132                                                 struct task_struct *task)
 133 {
 134 }
 135
 136 static inline void cpuset_lock(void) {}
 137 static inline void cpuset_unlock(void) {}
 138
 139 static inline int cpuset_mem_spread_node(void)
 140 {
 141         return 0;
 142 }
 143
 144 static inline int cpuset_do_page_mem_spread(void)
 145 {
 146         return 0;
 147 }
 148
 149 static inline int cpuset_do_slab_mem_spread(void)
 150 {
 151         return 0;
 152 }
 153
 154 static inline void cpuset_track_online_nodes(void) {}
 155
 156 static inline int current_cpuset_is_being_rebound(void)
 157 {
 158         return 0;
 159 }
 160
 161 static inline void rebuild_sched_domains(void)
 162 {
 163         partition_sched_domains(1, NULL, NULL);
 164 }
 165
 166 #endif /* !CONFIG_CPUSETS */
 167
 168 #endif /* _LINUX_CPUSET_H */