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 void cpuset_cpus_allowed(struct task_struct *p, cpumask_t *mask);
  24extern void cpuset_cpus_allowed_locked(struct task_struct *p, cpumask_t *mask);
  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_nodemask_valid_mems_allowed(nodemask_t *nodemask);
  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
  81extern void rebuild_sched_domains(void);
  82
  83#else /* !CONFIG_CPUSETS */
  84
  85static inline int cpuset_init_early(void) { return 0; }
  86static inline int cpuset_init(void) { return 0; }
  87static inline void cpuset_init_smp(void) {}
  88
  89static inline void cpuset_cpus_allowed(struct task_struct *p, cpumask_t *mask)
  90{
  91        *mask = cpu_possible_map;
  92}
  93static inline void cpuset_cpus_allowed_locked(struct task_struct *p,
  94                                                                cpumask_t *mask)
  95{
  96        *mask = cpu_possible_map;
  97}
  98
  99static 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])
 105static inline void cpuset_init_current_mems_allowed(void) {}
 106static inline void cpuset_update_task_memory_state(void) {}
 107
 108static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask)
 109{
 110        return 1;
 111}
 112
 113static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
 114{
 115        return 1;
 116}
 117
 118static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
 119{
 120        return 1;
 121}
 122
 123static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
 124                                                 const struct task_struct *tsk2)
 125{
 126        return 1;
 127}
 128
 129static inline void cpuset_memory_pressure_bump(void) {}
 130
 131static inline void cpuset_task_status_allowed(struct seq_file *m,
 132                                                struct task_struct *task)
 133{
 134}
 135
 136static inline void cpuset_lock(void) {}
 137static inline void cpuset_unlock(void) {}
 138
 139static inline int cpuset_mem_spread_node(void)
 140{
 141        return 0;
 142}
 143
 144static inline int cpuset_do_page_mem_spread(void)
 145{
 146        return 0;
 147}
 148
 149static inline int cpuset_do_slab_mem_spread(void)
 150{
 151        return 0;
 152}
 153
 154static inline void cpuset_track_online_nodes(void) {}
 155
 156static inline int current_cpuset_is_being_rebound(void)
 157{
 158        return 0;
 159}
 160
 161static 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 */
 169