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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); | |
9276b1bc | 26 | #define cpuset_current_mems_allowed (current->mems_allowed) |
1da177e4 | 27 | void cpuset_init_current_mems_allowed(void); |
cf2a473c | 28 | void cpuset_update_task_memory_state(void); |
5966514d PJ |
29 | #define cpuset_nodes_subset_current_mems_allowed(nodes) \ |
30 | nodes_subset((nodes), current->mems_allowed) | |
1da177e4 | 31 | int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl); |
202f72d5 PJ |
32 | |
33 | extern int __cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask); | |
34 | static int inline cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask) | |
35 | { | |
36 | return number_of_cpusets <= 1 || __cpuset_zone_allowed(z, gfp_mask); | |
37 | } | |
38 | ||
ef08e3b4 | 39 | extern int cpuset_excl_nodes_overlap(const struct task_struct *p); |
3e0d98b9 PJ |
40 | |
41 | #define cpuset_memory_pressure_bump() \ | |
42 | do { \ | |
43 | if (cpuset_memory_pressure_enabled) \ | |
44 | __cpuset_memory_pressure_bump(); \ | |
45 | } while (0) | |
46 | extern int cpuset_memory_pressure_enabled; | |
47 | extern void __cpuset_memory_pressure_bump(void); | |
48 | ||
15ad7cdc | 49 | extern const struct file_operations proc_cpuset_operations; |
1da177e4 LT |
50 | extern char *cpuset_task_status_allowed(struct task_struct *task, char *buffer); |
51 | ||
505970b9 PJ |
52 | extern void cpuset_lock(void); |
53 | extern void cpuset_unlock(void); | |
54 | ||
825a46af PJ |
55 | extern int cpuset_mem_spread_node(void); |
56 | ||
57 | static inline int cpuset_do_page_mem_spread(void) | |
58 | { | |
59 | return current->flags & PF_SPREAD_PAGE; | |
60 | } | |
61 | ||
62 | static inline int cpuset_do_slab_mem_spread(void) | |
63 | { | |
64 | return current->flags & PF_SPREAD_SLAB; | |
65 | } | |
66 | ||
38837fc7 PJ |
67 | extern void cpuset_track_online_nodes(void); |
68 | ||
1da177e4 LT |
69 | #else /* !CONFIG_CPUSETS */ |
70 | ||
c417f024 | 71 | static inline int cpuset_init_early(void) { return 0; } |
1da177e4 LT |
72 | static inline int cpuset_init(void) { return 0; } |
73 | static inline void cpuset_init_smp(void) {} | |
74 | static inline void cpuset_fork(struct task_struct *p) {} | |
75 | static inline void cpuset_exit(struct task_struct *p) {} | |
76 | ||
77 | static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p) | |
78 | { | |
79 | return cpu_possible_map; | |
80 | } | |
81 | ||
909d75a3 PJ |
82 | static inline nodemask_t cpuset_mems_allowed(struct task_struct *p) |
83 | { | |
84 | return node_possible_map; | |
85 | } | |
86 | ||
9276b1bc | 87 | #define cpuset_current_mems_allowed (node_online_map) |
1da177e4 | 88 | static inline void cpuset_init_current_mems_allowed(void) {} |
cf2a473c | 89 | static inline void cpuset_update_task_memory_state(void) {} |
5966514d | 90 | #define cpuset_nodes_subset_current_mems_allowed(nodes) (1) |
1da177e4 LT |
91 | |
92 | static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl) | |
93 | { | |
94 | return 1; | |
95 | } | |
96 | ||
dd0fc66f | 97 | static inline int cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask) |
1da177e4 LT |
98 | { |
99 | return 1; | |
100 | } | |
101 | ||
ef08e3b4 PJ |
102 | static inline int cpuset_excl_nodes_overlap(const struct task_struct *p) |
103 | { | |
104 | return 1; | |
105 | } | |
106 | ||
3e0d98b9 PJ |
107 | static inline void cpuset_memory_pressure_bump(void) {} |
108 | ||
1da177e4 LT |
109 | static inline char *cpuset_task_status_allowed(struct task_struct *task, |
110 | char *buffer) | |
111 | { | |
112 | return buffer; | |
113 | } | |
114 | ||
505970b9 PJ |
115 | static inline void cpuset_lock(void) {} |
116 | static inline void cpuset_unlock(void) {} | |
117 | ||
825a46af PJ |
118 | static inline int cpuset_mem_spread_node(void) |
119 | { | |
120 | return 0; | |
121 | } | |
122 | ||
123 | static inline int cpuset_do_page_mem_spread(void) | |
124 | { | |
125 | return 0; | |
126 | } | |
127 | ||
128 | static inline int cpuset_do_slab_mem_spread(void) | |
129 | { | |
130 | return 0; | |
131 | } | |
132 | ||
38837fc7 PJ |
133 | static inline void cpuset_track_online_nodes(void) {} |
134 | ||
1da177e4 LT |
135 | #endif /* !CONFIG_CPUSETS */ |
136 | ||
137 | #endif /* _LINUX_CPUSET_H */ |