Linux kernel mirror (for testing)
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linux
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#include <linux/mm.h>
16
17#ifdef CONFIG_CPUSETS
18
19extern int number_of_cpusets; /* How many cpusets are defined in system? */
20
21extern int cpuset_init_early(void);
22extern int cpuset_init(void);
23extern void cpuset_init_smp(void);
24extern void cpuset_cpus_allowed(struct task_struct *p, struct cpumask *mask);
25extern void cpuset_cpus_allowed_locked(struct task_struct *p,
26 struct cpumask *mask);
27extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
28#define cpuset_current_mems_allowed (current->mems_allowed)
29void cpuset_init_current_mems_allowed(void);
30void cpuset_update_task_memory_state(void);
31int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask);
32
33extern int __cpuset_node_allowed_softwall(int node, gfp_t gfp_mask);
34extern int __cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask);
35
36static inline int cpuset_node_allowed_softwall(int node, gfp_t gfp_mask)
37{
38 return number_of_cpusets <= 1 ||
39 __cpuset_node_allowed_softwall(node, gfp_mask);
40}
41
42static inline int cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask)
43{
44 return number_of_cpusets <= 1 ||
45 __cpuset_node_allowed_hardwall(node, gfp_mask);
46}
47
48static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
49{
50 return cpuset_node_allowed_softwall(zone_to_nid(z), gfp_mask);
51}
52
53static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
54{
55 return cpuset_node_allowed_hardwall(zone_to_nid(z), gfp_mask);
56}
57
58extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
59 const struct task_struct *tsk2);
60
61#define cpuset_memory_pressure_bump() \
62 do { \
63 if (cpuset_memory_pressure_enabled) \
64 __cpuset_memory_pressure_bump(); \
65 } while (0)
66extern int cpuset_memory_pressure_enabled;
67extern void __cpuset_memory_pressure_bump(void);
68
69extern const struct file_operations proc_cpuset_operations;
70struct seq_file;
71extern void cpuset_task_status_allowed(struct seq_file *m,
72 struct task_struct *task);
73
74extern void cpuset_lock(void);
75extern void cpuset_unlock(void);
76
77extern int cpuset_mem_spread_node(void);
78
79static inline int cpuset_do_page_mem_spread(void)
80{
81 return current->flags & PF_SPREAD_PAGE;
82}
83
84static inline int cpuset_do_slab_mem_spread(void)
85{
86 return current->flags & PF_SPREAD_SLAB;
87}
88
89extern int current_cpuset_is_being_rebound(void);
90
91extern void rebuild_sched_domains(void);
92
93extern void cpuset_print_task_mems_allowed(struct task_struct *p);
94
95#else /* !CONFIG_CPUSETS */
96
97static inline int cpuset_init_early(void) { return 0; }
98static inline int cpuset_init(void) { return 0; }
99static inline void cpuset_init_smp(void) {}
100
101static inline void cpuset_cpus_allowed(struct task_struct *p,
102 struct cpumask *mask)
103{
104 cpumask_copy(mask, cpu_possible_mask);
105}
106static inline void cpuset_cpus_allowed_locked(struct task_struct *p,
107 struct cpumask *mask)
108{
109 cpumask_copy(mask, cpu_possible_mask);
110}
111
112static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
113{
114 return node_possible_map;
115}
116
117#define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
118static inline void cpuset_init_current_mems_allowed(void) {}
119static inline void cpuset_update_task_memory_state(void) {}
120
121static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask)
122{
123 return 1;
124}
125
126static inline int cpuset_node_allowed_softwall(int node, gfp_t gfp_mask)
127{
128 return 1;
129}
130
131static inline int cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask)
132{
133 return 1;
134}
135
136static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
137{
138 return 1;
139}
140
141static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
142{
143 return 1;
144}
145
146static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
147 const struct task_struct *tsk2)
148{
149 return 1;
150}
151
152static inline void cpuset_memory_pressure_bump(void) {}
153
154static inline void cpuset_task_status_allowed(struct seq_file *m,
155 struct task_struct *task)
156{
157}
158
159static inline void cpuset_lock(void) {}
160static inline void cpuset_unlock(void) {}
161
162static inline int cpuset_mem_spread_node(void)
163{
164 return 0;
165}
166
167static inline int cpuset_do_page_mem_spread(void)
168{
169 return 0;
170}
171
172static inline int cpuset_do_slab_mem_spread(void)
173{
174 return 0;
175}
176
177static inline int current_cpuset_is_being_rebound(void)
178{
179 return 0;
180}
181
182static inline void rebuild_sched_domains(void)
183{
184 partition_sched_domains(1, NULL, NULL);
185}
186
187static inline void cpuset_print_task_mems_allowed(struct task_struct *p)
188{
189}
190
191#endif /* !CONFIG_CPUSETS */
192
193#endif /* _LINUX_CPUSET_H */