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#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(void);
22extern void cpuset_init_smp(void);
23extern void cpuset_cpus_allowed(struct task_struct *p, struct cpumask *mask);
24extern void cpuset_cpus_allowed_locked(struct task_struct *p,
25 struct cpumask *mask);
26extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
27#define cpuset_current_mems_allowed (current->mems_allowed)
28void cpuset_init_current_mems_allowed(void);
29int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask);
30
31extern int __cpuset_node_allowed_softwall(int node, gfp_t gfp_mask);
32extern int __cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask);
33
34static inline int cpuset_node_allowed_softwall(int node, gfp_t gfp_mask)
35{
36 return number_of_cpusets <= 1 ||
37 __cpuset_node_allowed_softwall(node, gfp_mask);
38}
39
40static inline int cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask)
41{
42 return number_of_cpusets <= 1 ||
43 __cpuset_node_allowed_hardwall(node, gfp_mask);
44}
45
46static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
47{
48 return cpuset_node_allowed_softwall(zone_to_nid(z), gfp_mask);
49}
50
51static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
52{
53 return cpuset_node_allowed_hardwall(zone_to_nid(z), gfp_mask);
54}
55
56extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
57 const struct task_struct *tsk2);
58
59#define cpuset_memory_pressure_bump() \
60 do { \
61 if (cpuset_memory_pressure_enabled) \
62 __cpuset_memory_pressure_bump(); \
63 } while (0)
64extern int cpuset_memory_pressure_enabled;
65extern void __cpuset_memory_pressure_bump(void);
66
67extern const struct file_operations proc_cpuset_operations;
68struct seq_file;
69extern void cpuset_task_status_allowed(struct seq_file *m,
70 struct task_struct *task);
71
72extern void cpuset_lock(void);
73extern void cpuset_unlock(void);
74
75extern int cpuset_mem_spread_node(void);
76
77static inline int cpuset_do_page_mem_spread(void)
78{
79 return current->flags & PF_SPREAD_PAGE;
80}
81
82static inline int cpuset_do_slab_mem_spread(void)
83{
84 return current->flags & PF_SPREAD_SLAB;
85}
86
87extern int current_cpuset_is_being_rebound(void);
88
89extern void rebuild_sched_domains(void);
90
91extern void cpuset_print_task_mems_allowed(struct task_struct *p);
92
93static inline void set_mems_allowed(nodemask_t nodemask)
94{
95 current->mems_allowed = nodemask;
96}
97
98#else /* !CONFIG_CPUSETS */
99
100static inline int cpuset_init(void) { return 0; }
101static inline void cpuset_init_smp(void) {}
102
103static inline void cpuset_cpus_allowed(struct task_struct *p,
104 struct cpumask *mask)
105{
106 cpumask_copy(mask, cpu_possible_mask);
107}
108static inline void cpuset_cpus_allowed_locked(struct task_struct *p,
109 struct cpumask *mask)
110{
111 cpumask_copy(mask, cpu_possible_mask);
112}
113
114static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
115{
116 return node_possible_map;
117}
118
119#define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
120static inline void cpuset_init_current_mems_allowed(void) {}
121
122static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask)
123{
124 return 1;
125}
126
127static inline int cpuset_node_allowed_softwall(int node, gfp_t gfp_mask)
128{
129 return 1;
130}
131
132static inline int cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask)
133{
134 return 1;
135}
136
137static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
138{
139 return 1;
140}
141
142static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
143{
144 return 1;
145}
146
147static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
148 const struct task_struct *tsk2)
149{
150 return 1;
151}
152
153static inline void cpuset_memory_pressure_bump(void) {}
154
155static inline void cpuset_task_status_allowed(struct seq_file *m,
156 struct task_struct *task)
157{
158}
159
160static inline void cpuset_lock(void) {}
161static inline void cpuset_unlock(void) {}
162
163static inline int cpuset_mem_spread_node(void)
164{
165 return 0;
166}
167
168static inline int cpuset_do_page_mem_spread(void)
169{
170 return 0;
171}
172
173static inline int cpuset_do_slab_mem_spread(void)
174{
175 return 0;
176}
177
178static inline int current_cpuset_is_being_rebound(void)
179{
180 return 0;
181}
182
183static inline void rebuild_sched_domains(void)
184{
185 partition_sched_domains(1, NULL, NULL);
186}
187
188static inline void cpuset_print_task_mems_allowed(struct task_struct *p)
189{
190}
191
192static inline void set_mems_allowed(nodemask_t nodemask)
193{
194}
195
196#endif /* !CONFIG_CPUSETS */
197
198#endif /* _LINUX_CPUSET_H */