1#ifndef _LINUX_MEMPOLICY_H
2#define _LINUX_MEMPOLICY_H 1
3
4#include <linux/errno.h>
5
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17
18enum {
19 MPOL_DEFAULT,
20 MPOL_PREFERRED,
21 MPOL_BIND,
22 MPOL_INTERLEAVE,
23 MPOL_MAX,
24};
25
26
27#define MPOL_F_STATIC_NODES (1 << 15)
28#define MPOL_F_RELATIVE_NODES (1 << 14)
29
30
31
32
33
34#define MPOL_MODE_FLAGS (MPOL_F_STATIC_NODES | MPOL_F_RELATIVE_NODES)
35
36
37#define MPOL_F_NODE (1<<0)
38#define MPOL_F_ADDR (1<<1)
39#define MPOL_F_MEMS_ALLOWED (1<<2)
40
41
42#define MPOL_MF_STRICT (1<<0)
43#define MPOL_MF_MOVE (1<<1)
44#define MPOL_MF_MOVE_ALL (1<<2)
45#define MPOL_MF_INTERNAL (1<<3)
46
47
48
49
50
51
52#define MPOL_F_SHARED (1 << 0)
53#define MPOL_F_LOCAL (1 << 1)
54
55#ifdef __KERNEL__
56
57#include <linux/mmzone.h>
58#include <linux/slab.h>
59#include <linux/rbtree.h>
60#include <linux/spinlock.h>
61#include <linux/nodemask.h>
62#include <linux/pagemap.h>
63
64struct mm_struct;
65
66#ifdef CONFIG_NUMA
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89
90struct mempolicy {
91 atomic_t refcnt;
92 unsigned short mode;
93 unsigned short flags;
94 union {
95 short preferred_node;
96 nodemask_t nodes;
97
98 } v;
99 union {
100 nodemask_t cpuset_mems_allowed;
101 nodemask_t user_nodemask;
102 } w;
103};
104
105
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108
109
110extern void __mpol_put(struct mempolicy *pol);
111static inline void mpol_put(struct mempolicy *pol)
112{
113 if (pol)
114 __mpol_put(pol);
115}
116
117
118
119
120
121static inline int mpol_needs_cond_ref(struct mempolicy *pol)
122{
123 return (pol && (pol->flags & MPOL_F_SHARED));
124}
125
126static inline void mpol_cond_put(struct mempolicy *pol)
127{
128 if (mpol_needs_cond_ref(pol))
129 __mpol_put(pol);
130}
131
132extern struct mempolicy *__mpol_cond_copy(struct mempolicy *tompol,
133 struct mempolicy *frompol);
134static inline struct mempolicy *mpol_cond_copy(struct mempolicy *tompol,
135 struct mempolicy *frompol)
136{
137 if (!frompol)
138 return frompol;
139 return __mpol_cond_copy(tompol, frompol);
140}
141
142extern struct mempolicy *__mpol_dup(struct mempolicy *pol);
143static inline struct mempolicy *mpol_dup(struct mempolicy *pol)
144{
145 if (pol)
146 pol = __mpol_dup(pol);
147 return pol;
148}
149
150#define vma_policy(vma) ((vma)->vm_policy)
151#define vma_set_policy(vma, pol) ((vma)->vm_policy = (pol))
152
153static inline void mpol_get(struct mempolicy *pol)
154{
155 if (pol)
156 atomic_inc(&pol->refcnt);
157}
158
159extern int __mpol_equal(struct mempolicy *a, struct mempolicy *b);
160static inline int mpol_equal(struct mempolicy *a, struct mempolicy *b)
161{
162 if (a == b)
163 return 1;
164 return __mpol_equal(a, b);
165}
166
167
168
169
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171
172
173
174
175struct sp_node {
176 struct rb_node nd;
177 unsigned long start, end;
178 struct mempolicy *policy;
179};
180
181struct shared_policy {
182 struct rb_root root;
183 spinlock_t lock;
184};
185
186void mpol_shared_policy_init(struct shared_policy *sp, struct mempolicy *mpol);
187int mpol_set_shared_policy(struct shared_policy *info,
188 struct vm_area_struct *vma,
189 struct mempolicy *new);
190void mpol_free_shared_policy(struct shared_policy *p);
191struct mempolicy *mpol_shared_policy_lookup(struct shared_policy *sp,
192 unsigned long idx);
193
194extern void numa_default_policy(void);
195extern void numa_policy_init(void);
196extern void mpol_rebind_task(struct task_struct *tsk,
197 const nodemask_t *new);
198extern void mpol_rebind_mm(struct mm_struct *mm, nodemask_t *new);
199extern void mpol_fix_fork_child_flag(struct task_struct *p);
200
201extern struct zonelist *huge_zonelist(struct vm_area_struct *vma,
202 unsigned long addr, gfp_t gfp_flags,
203 struct mempolicy **mpol, nodemask_t **nodemask);
204extern unsigned slab_node(struct mempolicy *policy);
205
206extern enum zone_type policy_zone;
207
208static inline void check_highest_zone(enum zone_type k)
209{
210 if (k > policy_zone && k != ZONE_MOVABLE)
211 policy_zone = k;
212}
213
214int do_migrate_pages(struct mm_struct *mm,
215 const nodemask_t *from_nodes, const nodemask_t *to_nodes, int flags);
216
217
218#ifdef CONFIG_TMPFS
219extern int mpol_parse_str(char *str, struct mempolicy **mpol, int no_context);
220
221extern int mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol,
222 int no_context);
223#endif
224
225
226static inline int vma_migratable(struct vm_area_struct *vma)
227{
228 if (vma->vm_flags & (VM_IO|VM_HUGETLB|VM_PFNMAP|VM_RESERVED))
229 return 0;
230
231
232
233
234
235 if (vma->vm_file &&
236 gfp_zone(mapping_gfp_mask(vma->vm_file->f_mapping))
237 < policy_zone)
238 return 0;
239 return 1;
240}
241
242#else
243
244struct mempolicy {};
245
246static inline int mpol_equal(struct mempolicy *a, struct mempolicy *b)
247{
248 return 1;
249}
250
251static inline void mpol_put(struct mempolicy *p)
252{
253}
254
255static inline void mpol_cond_put(struct mempolicy *pol)
256{
257}
258
259static inline struct mempolicy *mpol_cond_copy(struct mempolicy *to,
260 struct mempolicy *from)
261{
262 return from;
263}
264
265static inline void mpol_get(struct mempolicy *pol)
266{
267}
268
269static inline struct mempolicy *mpol_dup(struct mempolicy *old)
270{
271 return NULL;
272}
273
274struct shared_policy {};
275
276static inline int mpol_set_shared_policy(struct shared_policy *info,
277 struct vm_area_struct *vma,
278 struct mempolicy *new)
279{
280 return -EINVAL;
281}
282
283static inline void mpol_shared_policy_init(struct shared_policy *sp,
284 struct mempolicy *mpol)
285{
286}
287
288static inline void mpol_free_shared_policy(struct shared_policy *p)
289{
290}
291
292static inline struct mempolicy *
293mpol_shared_policy_lookup(struct shared_policy *sp, unsigned long idx)
294{
295 return NULL;
296}
297
298#define vma_policy(vma) NULL
299#define vma_set_policy(vma, pol) do {} while(0)
300
301static inline void numa_policy_init(void)
302{
303}
304
305static inline void numa_default_policy(void)
306{
307}
308
309static inline void mpol_rebind_task(struct task_struct *tsk,
310 const nodemask_t *new)
311{
312}
313
314static inline void mpol_rebind_mm(struct mm_struct *mm, nodemask_t *new)
315{
316}
317
318static inline void mpol_fix_fork_child_flag(struct task_struct *p)
319{
320}
321
322static inline struct zonelist *huge_zonelist(struct vm_area_struct *vma,
323 unsigned long addr, gfp_t gfp_flags,
324 struct mempolicy **mpol, nodemask_t **nodemask)
325{
326 *mpol = NULL;
327 *nodemask = NULL;
328 return node_zonelist(0, gfp_flags);
329}
330
331static inline int do_migrate_pages(struct mm_struct *mm,
332 const nodemask_t *from_nodes,
333 const nodemask_t *to_nodes, int flags)
334{
335 return 0;
336}
337
338static inline void check_highest_zone(int k)
339{
340}
341
342#ifdef CONFIG_TMPFS
343static inline int mpol_parse_str(char *str, struct mempolicy **mpol,
344 int no_context)
345{
346 return 1;
347}
348
349static inline int mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol,
350 int no_context)
351{
352 return 0;
353}
354#endif
355
356#endif
357#endif
358
359#endif
360