LXR linux/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
  18extern int number_of_cpusets;   /* How many cpusets are defined in system? */
  19
  20extern int cpuset_init_early(void);
  21extern int cpuset_init(void);
  22extern void cpuset_init_smp(void);
  23extern cpumask_t cpuset_cpus_allowed(struct task_struct *p);
  24extern cpumask_t cpuset_cpus_allowed_locked(struct task_struct *p);
  25extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
  26#define cpuset_current_mems_allowed (current->mems_allowed)
  27void cpuset_init_current_mems_allowed(void);
  28void cpuset_update_task_memory_state(void);
  29int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl);
  30
  31extern int __cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask);
  32extern int __cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask);
  33
  34static 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
  40static 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
  46extern 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)
  54extern int cpuset_memory_pressure_enabled;
  55extern void __cpuset_memory_pressure_bump(void);
  56
  57extern const struct file_operations proc_cpuset_operations;
  58struct seq_file;
  59extern void cpuset_task_status_allowed(struct seq_file *m,
  60                                        struct task_struct *task);
  61
  62extern void cpuset_lock(void);
  63extern void cpuset_unlock(void);
  64
  65extern int cpuset_mem_spread_node(void);
  66
  67static inline int cpuset_do_page_mem_spread(void)
  68{
  69        return current->flags & PF_SPREAD_PAGE;
  70}
  71
  72static inline int cpuset_do_slab_mem_spread(void)
  73{
  74        return current->flags & PF_SPREAD_SLAB;
  75}
  76
  77extern void cpuset_track_online_nodes(void);
  78
  79extern int current_cpuset_is_being_rebound(void);
  80
  81#else /* !CONFIG_CPUSETS */
  82
  83static inline int cpuset_init_early(void) { return 0; }
  84static inline int cpuset_init(void) { return 0; }
  85static inline void cpuset_init_smp(void) {}
  86
  87static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p)
  88{
  89        return cpu_possible_map;
  90}
  91static inline cpumask_t cpuset_cpus_allowed_locked(struct task_struct *p)
  92{
  93        return cpu_possible_map;
  94}
  95
  96static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
  97{
  98        return node_possible_map;
  99}
 100
 101#define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
 102static inline void cpuset_init_current_mems_allowed(void) {}
 103static inline void cpuset_update_task_memory_state(void) {}
 104
 105static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl)
 106{
 107        return 1;
 108}
 109
 110static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
 111{
 112        return 1;
 113}
 114
 115static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
 116{
 117        return 1;
 118}
 119
 120static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
 121                                                 const struct task_struct *tsk2)
 122{
 123        return 1;
 124}
 125
 126static inline void cpuset_memory_pressure_bump(void) {}
 127
 128static inline void cpuset_task_status_allowed(struct seq_file *m,
 129                                                struct task_struct *task)
 130{
 131}
 132
 133static inline void cpuset_lock(void) {}
 134static inline void cpuset_unlock(void) {}
 135
 136static inline int cpuset_mem_spread_node(void)
 137{
 138        return 0;
 139}
 140
 141static inline int cpuset_do_page_mem_spread(void)
 142{
 143        return 0;
 144}
 145
 146static inline int cpuset_do_slab_mem_spread(void)
 147{
 148        return 0;
 149}
 150
 151static inline void cpuset_track_online_nodes(void) {}
 152
 153static inline int current_cpuset_is_being_rebound(void)
 154{
 155        return 0;
 156}
 157
 158#endif /* !CONFIG_CPUSETS */
 159
 160#endif /* _LINUX_CPUSET_H */
 161