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