1#ifndef _LINUX_CPUSET_H
2#define _LINUX_CPUSET_H
3
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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;
20
21extern int cpuset_init(void);
22extern void cpuset_init_smp(void);
23extern void cpuset_update_active_cpus(void);
24extern void cpuset_cpus_allowed(struct task_struct *p, struct cpumask *mask);
25extern int cpuset_cpus_allowed_fallback(struct task_struct *p);
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 int cpuset_mem_spread_node(void);
73extern int cpuset_slab_spread_node(void);
74
75static inline int cpuset_do_page_mem_spread(void)
76{
77 return current->flags & PF_SPREAD_PAGE;
78}
79
80static inline int cpuset_do_slab_mem_spread(void)
81{
82 return current->flags & PF_SPREAD_SLAB;
83}
84
85extern int current_cpuset_is_being_rebound(void);
86
87extern void rebuild_sched_domains(void);
88
89extern void cpuset_print_task_mems_allowed(struct task_struct *p);
90
91
92
93
94
95static inline void get_mems_allowed(void)
96{
97 current->mems_allowed_change_disable++;
98
99
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102
103
104
105
106
107 smp_mb();
108}
109
110static inline void put_mems_allowed(void)
111{
112
113
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116
117
118
119
120 smp_mb();
121 --ACCESS_ONCE(current->mems_allowed_change_disable);
122}
123
124static inline void set_mems_allowed(nodemask_t nodemask)
125{
126 task_lock(current);
127 current->mems_allowed = nodemask;
128 task_unlock(current);
129}
130
131#else
132
133static inline int cpuset_init(void) { return 0; }
134static inline void cpuset_init_smp(void) {}
135
136static inline void cpuset_update_active_cpus(void)
137{
138 partition_sched_domains(1, NULL, NULL);
139}
140
141static inline void cpuset_cpus_allowed(struct task_struct *p,
142 struct cpumask *mask)
143{
144 cpumask_copy(mask, cpu_possible_mask);
145}
146
147static inline int cpuset_cpus_allowed_fallback(struct task_struct *p)
148{
149 cpumask_copy(&p->cpus_allowed, cpu_possible_mask);
150 return cpumask_any(cpu_active_mask);
151}
152
153static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
154{
155 return node_possible_map;
156}
157
158#define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
159static inline void cpuset_init_current_mems_allowed(void) {}
160
161static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask)
162{
163 return 1;
164}
165
166static inline int cpuset_node_allowed_softwall(int node, gfp_t gfp_mask)
167{
168 return 1;
169}
170
171static inline int cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask)
172{
173 return 1;
174}
175
176static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
177{
178 return 1;
179}
180
181static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
182{
183 return 1;
184}
185
186static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
187 const struct task_struct *tsk2)
188{
189 return 1;
190}
191
192static inline void cpuset_memory_pressure_bump(void) {}
193
194static inline void cpuset_task_status_allowed(struct seq_file *m,
195 struct task_struct *task)
196{
197}
198
199static inline int cpuset_mem_spread_node(void)
200{
201 return 0;
202}
203
204static inline int cpuset_slab_spread_node(void)
205{
206 return 0;
207}
208
209static inline int cpuset_do_page_mem_spread(void)
210{
211 return 0;
212}
213
214static inline int cpuset_do_slab_mem_spread(void)
215{
216 return 0;
217}
218
219static inline int current_cpuset_is_being_rebound(void)
220{
221 return 0;
222}
223
224static inline void rebuild_sched_domains(void)
225{
226 partition_sched_domains(1, NULL, NULL);
227}
228
229static inline void cpuset_print_task_mems_allowed(struct task_struct *p)
230{
231}
232
233static inline void set_mems_allowed(nodemask_t nodemask)
234{
235}
236
237static inline void get_mems_allowed(void)
238{
239}
240
241static inline void put_mems_allowed(void)
242{
243}
244
245#endif
246
247#endif
248