Linux kernel mirror (for testing)
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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);
29#define cpuset_nodes_subset_current_mems_allowed(nodes) \
30 nodes_subset((nodes), current->mems_allowed)
31int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl);
32
33extern int __cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask);
34extern int __cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask);
35
36static int inline cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
37{
38 return number_of_cpusets <= 1 ||
39 __cpuset_zone_allowed_softwall(z, gfp_mask);
40}
41
42static int inline cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
43{
44 return number_of_cpusets <= 1 ||
45 __cpuset_zone_allowed_hardwall(z, gfp_mask);
46}
47
48extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
49 const struct task_struct *tsk2);
50
51#define cpuset_memory_pressure_bump() \
52 do { \
53 if (cpuset_memory_pressure_enabled) \
54 __cpuset_memory_pressure_bump(); \
55 } while (0)
56extern int cpuset_memory_pressure_enabled;
57extern void __cpuset_memory_pressure_bump(void);
58
59extern const struct file_operations proc_cpuset_operations;
60extern char *cpuset_task_status_allowed(struct task_struct *task, char *buffer);
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#define cpuset_nodes_subset_current_mems_allowed(nodes) (1)
105
106static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl)
107{
108 return 1;
109}
110
111static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
112{
113 return 1;
114}
115
116static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
117{
118 return 1;
119}
120
121static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
122 const struct task_struct *tsk2)
123{
124 return 1;
125}
126
127static inline void cpuset_memory_pressure_bump(void) {}
128
129static inline char *cpuset_task_status_allowed(struct task_struct *task,
130 char *buffer)
131{
132 return buffer;
133}
134
135static inline void cpuset_lock(void) {}
136static inline void cpuset_unlock(void) {}
137
138static inline int cpuset_mem_spread_node(void)
139{
140 return 0;
141}
142
143static inline int cpuset_do_page_mem_spread(void)
144{
145 return 0;
146}
147
148static inline int cpuset_do_slab_mem_spread(void)
149{
150 return 0;
151}
152
153static inline void cpuset_track_online_nodes(void) {}
154
155static inline int current_cpuset_is_being_rebound(void)
156{
157 return 0;
158}
159
160#endif /* !CONFIG_CPUSETS */
161
162#endif /* _LINUX_CPUSET_H */