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 #include <linux/mm.h>
  16
  17 #ifdef CONFIG_CPUSETS
  18
  19 extern int number_of_cpusets;   /* How many cpusets are defined in system? */
  20
  21 extern int cpuset_init(void);
  22 extern void cpuset_init_smp(void);
  23 extern void cpuset_cpus_allowed(struct task_struct *p, struct cpumask *mask);
  24 extern void cpuset_cpus_allowed_locked(struct task_struct *p,
  25                                        struct cpumask *mask);
  26 extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
  27 #define cpuset_current_mems_allowed (current->mems_allowed)
  28 void cpuset_init_current_mems_allowed(void);
  29 int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask);
  30
  31 extern int __cpuset_node_allowed_softwall(int node, gfp_t gfp_mask);
  32 extern int __cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask);
  33
  34 static inline int cpuset_node_allowed_softwall(int node, gfp_t gfp_mask)
  35 {
  36         return number_of_cpusets <= 1 ||
  37                 __cpuset_node_allowed_softwall(node, gfp_mask);
  38 }
  39
  40 static inline int cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask)
  41 {
  42         return number_of_cpusets <= 1 ||
  43                 __cpuset_node_allowed_hardwall(node, gfp_mask);
  44 }
  45
  46 static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
  47 {
  48         return cpuset_node_allowed_softwall(zone_to_nid(z), gfp_mask);
  49 }
  50
  51 static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
  52 {
  53         return cpuset_node_allowed_hardwall(zone_to_nid(z), gfp_mask);
  54 }
  55
  56 extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
  57                                           const struct task_struct *tsk2);
  58
  59 #define cpuset_memory_pressure_bump()                           \
  60         do {                                                    \
  61                 if (cpuset_memory_pressure_enabled)             \
  62                         __cpuset_memory_pressure_bump();        \
  63         } while (0)
  64 extern int cpuset_memory_pressure_enabled;
  65 extern void __cpuset_memory_pressure_bump(void);
  66
  67 extern const struct file_operations proc_cpuset_operations;
  68 struct seq_file;
  69 extern void cpuset_task_status_allowed(struct seq_file *m,
  70                                         struct task_struct *task);
  71
  72 extern void cpuset_lock(void);
  73 extern void cpuset_unlock(void);
  74
  75 extern int cpuset_mem_spread_node(void);
  76
  77 static inline int cpuset_do_page_mem_spread(void)
  78 {
  79         return current->flags & PF_SPREAD_PAGE;
  80 }
  81
  82 static inline int cpuset_do_slab_mem_spread(void)
  83 {
  84         return current->flags & PF_SPREAD_SLAB;
  85 }
  86
  87 extern int current_cpuset_is_being_rebound(void);
  88
  89 extern void rebuild_sched_domains(void);
  90
  91 extern void cpuset_print_task_mems_allowed(struct task_struct *p);
  92
  93 static inline void set_mems_allowed(nodemask_t nodemask)
  94 {
  95         current->mems_allowed = nodemask;
  96 }
  97
  98 #else /* !CONFIG_CPUSETS */
  99
 100 static inline int cpuset_init(void) { return 0; }
 101 static inline void cpuset_init_smp(void) {}
 102
 103 static inline void cpuset_cpus_allowed(struct task_struct *p,
 104                                        struct cpumask *mask)
 105 {
 106         cpumask_copy(mask, cpu_possible_mask);
 107 }
 108 static inline void cpuset_cpus_allowed_locked(struct task_struct *p,
 109                                               struct cpumask *mask)
 110 {
 111         cpumask_copy(mask, cpu_possible_mask);
 112 }
 113
 114 static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
 115 {
 116         return node_possible_map;
 117 }
 118
 119 #define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
 120 static inline void cpuset_init_current_mems_allowed(void) {}
 121
 122 static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask)
 123 {
 124         return 1;
 125 }
 126
 127 static inline int cpuset_node_allowed_softwall(int node, gfp_t gfp_mask)
 128 {
 129         return 1;
 130 }
 131
 132 static inline int cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask)
 133 {
 134         return 1;
 135 }
 136
 137 static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
 138 {
 139         return 1;
 140 }
 141
 142 static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
 143 {
 144         return 1;
 145 }
 146
 147 static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
 148                                                  const struct task_struct *tsk2)
 149 {
 150         return 1;
 151 }
 152
 153 static inline void cpuset_memory_pressure_bump(void) {}
 154
 155 static inline void cpuset_task_status_allowed(struct seq_file *m,
 156                                                 struct task_struct *task)
 157 {
 158 }
 159
 160 static inline void cpuset_lock(void) {}
 161 static inline void cpuset_unlock(void) {}
 162
 163 static inline int cpuset_mem_spread_node(void)
 164 {
 165         return 0;
 166 }
 167
 168 static inline int cpuset_do_page_mem_spread(void)
 169 {
 170         return 0;
 171 }
 172
 173 static inline int cpuset_do_slab_mem_spread(void)
 174 {
 175         return 0;
 176 }
 177
 178 static inline int current_cpuset_is_being_rebound(void)
 179 {
 180         return 0;
 181 }
 182
 183 static inline void rebuild_sched_domains(void)
 184 {
 185         partition_sched_domains(1, NULL, NULL);
 186 }
 187
 188 static inline void cpuset_print_task_mems_allowed(struct task_struct *p)
 189 {
 190 }
 191
 192 static inline void set_mems_allowed(nodemask_t nodemask)
 193 {
 194 }
 195
 196 #endif /* !CONFIG_CPUSETS */
 197
 198 #endif /* _LINUX_CPUSET_H */