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-rw-r--r--include/linux/mempolicy.h19
-rw-r--r--include/linux/migrate.h21
2 files changed, 19 insertions, 21 deletions
diff --git a/include/linux/mempolicy.h b/include/linux/mempolicy.h
index 3a39570b81b8..085c903fe0f1 100644
--- a/include/linux/mempolicy.h
+++ b/include/linux/mempolicy.h
@@ -59,6 +59,7 @@ enum {
59#include <linux/rbtree.h> 59#include <linux/rbtree.h>
60#include <linux/spinlock.h> 60#include <linux/spinlock.h>
61#include <linux/nodemask.h> 61#include <linux/nodemask.h>
62#include <linux/pagemap.h>
62 63
63struct mm_struct; 64struct mm_struct;
64 65
@@ -220,6 +221,24 @@ extern int mpol_parse_str(char *str, struct mempolicy **mpol, int no_context);
220extern int mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol, 221extern int mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol,
221 int no_context); 222 int no_context);
222#endif 223#endif
224
225/* Check if a vma is migratable */
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 * Migration allocates pages in the highest zone. If we cannot
232 * do so then migration (at least from node to node) is not
233 * possible.
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
223#else 242#else
224 243
225struct mempolicy {}; 244struct mempolicy {};
diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index e10a90a93b5d..03aea612d284 100644
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -3,28 +3,10 @@
3 3
4#include <linux/mm.h> 4#include <linux/mm.h>
5#include <linux/mempolicy.h> 5#include <linux/mempolicy.h>
6#include <linux/pagemap.h>
7 6
8typedef struct page *new_page_t(struct page *, unsigned long private, int **); 7typedef struct page *new_page_t(struct page *, unsigned long private, int **);
9 8
10#ifdef CONFIG_MIGRATION 9#ifdef CONFIG_MIGRATION
11/* Check if a vma is migratable */
12static inline int vma_migratable(struct vm_area_struct *vma)
13{
14 if (vma->vm_flags & (VM_IO|VM_HUGETLB|VM_PFNMAP|VM_RESERVED))
15 return 0;
16 /*
17 * Migration allocates pages in the highest zone. If we cannot
18 * do so then migration (at least from node to node) is not
19 * possible.
20 */
21 if (vma->vm_file &&
22 gfp_zone(mapping_gfp_mask(vma->vm_file->f_mapping))
23 < policy_zone)
24 return 0;
25 return 1;
26}
27
28extern int isolate_lru_page(struct page *p, struct list_head *pagelist); 10extern int isolate_lru_page(struct page *p, struct list_head *pagelist);
29extern int putback_lru_pages(struct list_head *l); 11extern int putback_lru_pages(struct list_head *l);
30extern int migrate_page(struct address_space *, 12extern int migrate_page(struct address_space *,
@@ -39,9 +21,6 @@ extern int migrate_vmas(struct mm_struct *mm,
39 const nodemask_t *from, const nodemask_t *to, 21 const nodemask_t *from, const nodemask_t *to,
40 unsigned long flags); 22 unsigned long flags);
41#else 23#else
42static inline int vma_migratable(struct vm_area_struct *vma)
43 { return 0; }
44
45static inline int isolate_lru_page(struct page *p, struct list_head *list) 24static inline int isolate_lru_page(struct page *p, struct list_head *list)
46 { return -ENOSYS; } 25 { return -ENOSYS; }
47static inline int putback_lru_pages(struct list_head *l) { return 0; } 26static inline int putback_lru_pages(struct list_head *l) { return 0; }