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1da177e4 LT |
1 | #ifndef _LINUX_CPUSET_H |
2 | #define _LINUX_CPUSET_H | |
3 | /* | |
4 | * cpuset interface | |
5 | * | |
6 | * Copyright (C) 2003 BULL SA | |
825a46af | 7 | * Copyright (C) 2004-2006 Silicon Graphics, Inc. |
1da177e4 LT |
8 | * |
9 | */ | |
10 | ||
11 | #include <linux/sched.h> | |
12 | #include <linux/cpumask.h> | |
13 | #include <linux/nodemask.h> | |
14 | ||
15 | #ifdef CONFIG_CPUSETS | |
16 | ||
202f72d5 PJ |
17 | extern int number_of_cpusets; /* How many cpusets are defined in system? */ |
18 | ||
c417f024 | 19 | extern int cpuset_init_early(void); |
1da177e4 LT |
20 | extern int cpuset_init(void); |
21 | extern void cpuset_init_smp(void); | |
22 | extern void cpuset_fork(struct task_struct *p); | |
23 | extern void cpuset_exit(struct task_struct *p); | |
909d75a3 PJ |
24 | extern cpumask_t cpuset_cpus_allowed(struct task_struct *p); |
25 | extern nodemask_t cpuset_mems_allowed(struct task_struct *p); | |
1da177e4 | 26 | void cpuset_init_current_mems_allowed(void); |
cf2a473c | 27 | void cpuset_update_task_memory_state(void); |
5966514d PJ |
28 | #define cpuset_nodes_subset_current_mems_allowed(nodes) \ |
29 | nodes_subset((nodes), current->mems_allowed) | |
1da177e4 | 30 | int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl); |
202f72d5 PJ |
31 | |
32 | extern int __cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask); | |
33 | static int inline cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask) | |
34 | { | |
35 | return number_of_cpusets <= 1 || __cpuset_zone_allowed(z, gfp_mask); | |
36 | } | |
37 | ||
ef08e3b4 | 38 | extern int cpuset_excl_nodes_overlap(const struct task_struct *p); |
3e0d98b9 PJ |
39 | |
40 | #define cpuset_memory_pressure_bump() \ | |
41 | do { \ | |
42 | if (cpuset_memory_pressure_enabled) \ | |
43 | __cpuset_memory_pressure_bump(); \ | |
44 | } while (0) | |
45 | extern int cpuset_memory_pressure_enabled; | |
46 | extern void __cpuset_memory_pressure_bump(void); | |
47 | ||
1da177e4 LT |
48 | extern struct file_operations proc_cpuset_operations; |
49 | extern char *cpuset_task_status_allowed(struct task_struct *task, char *buffer); | |
50 | ||
505970b9 PJ |
51 | extern void cpuset_lock(void); |
52 | extern void cpuset_unlock(void); | |
53 | ||
825a46af PJ |
54 | extern int cpuset_mem_spread_node(void); |
55 | ||
56 | static inline int cpuset_do_page_mem_spread(void) | |
57 | { | |
58 | return current->flags & PF_SPREAD_PAGE; | |
59 | } | |
60 | ||
61 | static inline int cpuset_do_slab_mem_spread(void) | |
62 | { | |
63 | return current->flags & PF_SPREAD_SLAB; | |
64 | } | |
65 | ||
38837fc7 PJ |
66 | extern void cpuset_track_online_nodes(void); |
67 | ||
1da177e4 LT |
68 | #else /* !CONFIG_CPUSETS */ |
69 | ||
c417f024 | 70 | static inline int cpuset_init_early(void) { return 0; } |
1da177e4 LT |
71 | static inline int cpuset_init(void) { return 0; } |
72 | static inline void cpuset_init_smp(void) {} | |
73 | static inline void cpuset_fork(struct task_struct *p) {} | |
74 | static inline void cpuset_exit(struct task_struct *p) {} | |
75 | ||
76 | static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p) | |
77 | { | |
78 | return cpu_possible_map; | |
79 | } | |
80 | ||
909d75a3 PJ |
81 | static inline nodemask_t cpuset_mems_allowed(struct task_struct *p) |
82 | { | |
83 | return node_possible_map; | |
84 | } | |
85 | ||
1da177e4 | 86 | static inline void cpuset_init_current_mems_allowed(void) {} |
cf2a473c | 87 | static inline void cpuset_update_task_memory_state(void) {} |
5966514d | 88 | #define cpuset_nodes_subset_current_mems_allowed(nodes) (1) |
1da177e4 LT |
89 | |
90 | static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl) | |
91 | { | |
92 | return 1; | |
93 | } | |
94 | ||
dd0fc66f | 95 | static inline int cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask) |
1da177e4 LT |
96 | { |
97 | return 1; | |
98 | } | |
99 | ||
ef08e3b4 PJ |
100 | static inline int cpuset_excl_nodes_overlap(const struct task_struct *p) |
101 | { | |
102 | return 1; | |
103 | } | |
104 | ||
3e0d98b9 PJ |
105 | static inline void cpuset_memory_pressure_bump(void) {} |
106 | ||
1da177e4 LT |
107 | static inline char *cpuset_task_status_allowed(struct task_struct *task, |
108 | char *buffer) | |
109 | { | |
110 | return buffer; | |
111 | } | |
112 | ||
505970b9 PJ |
113 | static inline void cpuset_lock(void) {} |
114 | static inline void cpuset_unlock(void) {} | |
115 | ||
825a46af PJ |
116 | static inline int cpuset_mem_spread_node(void) |
117 | { | |
118 | return 0; | |
119 | } | |
120 | ||
121 | static inline int cpuset_do_page_mem_spread(void) | |
122 | { | |
123 | return 0; | |
124 | } | |
125 | ||
126 | static inline int cpuset_do_slab_mem_spread(void) | |
127 | { | |
128 | return 0; | |
129 | } | |
130 | ||
38837fc7 PJ |
131 | static inline void cpuset_track_online_nodes(void) {} |
132 | ||
1da177e4 LT |
133 | #endif /* !CONFIG_CPUSETS */ |
134 | ||
135 | #endif /* _LINUX_CPUSET_H */ |