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authorJonathan Herman <hermanjl@cs.unc.edu>2013-01-17 16:15:55 -0500
committerJonathan Herman <hermanjl@cs.unc.edu>2013-01-17 16:15:55 -0500
commit8dea78da5cee153b8af9c07a2745f6c55057fe12 (patch)
treea8f4d49d63b1ecc92f2fddceba0655b2472c5bd9 /include/linux/migrate.h
parent406089d01562f1e2bf9f089fd7637009ebaad589 (diff)
Patched in Tegra support.
Diffstat (limited to 'include/linux/migrate.h')
-rw-r--r--include/linux/migrate.h78
1 files changed, 9 insertions, 69 deletions
diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index 1e9f627967a..e39aeecfe9a 100644
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -3,48 +3,21 @@
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/migrate_mode.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/*
11 * Return values from addresss_space_operations.migratepage():
12 * - negative errno on page migration failure;
13 * - zero on page migration success;
14 *
15 * The balloon page migration introduces this special case where a 'distinct'
16 * return code is used to flag a successful page migration to unmap_and_move().
17 * This approach is necessary because page migration can race against balloon
18 * deflation procedure, and for such case we could introduce a nasty page leak
19 * if a successfully migrated balloon page gets released concurrently with
20 * migration's unmap_and_move() wrap-up steps.
21 */
22#define MIGRATEPAGE_SUCCESS 0
23#define MIGRATEPAGE_BALLOON_SUCCESS 1 /* special ret code for balloon page
24 * sucessful migration case.
25 */
26enum migrate_reason {
27 MR_COMPACTION,
28 MR_MEMORY_FAILURE,
29 MR_MEMORY_HOTPLUG,
30 MR_SYSCALL, /* also applies to cpusets */
31 MR_MEMPOLICY_MBIND,
32 MR_NUMA_MISPLACED,
33 MR_CMA
34};
35
36#ifdef CONFIG_MIGRATION 9#ifdef CONFIG_MIGRATION
10#define PAGE_MIGRATION 1
37 11
38extern void putback_lru_pages(struct list_head *l); 12extern void putback_lru_pages(struct list_head *l);
39extern void putback_movable_pages(struct list_head *l);
40extern int migrate_page(struct address_space *, 13extern int migrate_page(struct address_space *,
41 struct page *, struct page *, enum migrate_mode); 14 struct page *, struct page *);
42extern int migrate_pages(struct list_head *l, new_page_t x, 15extern int migrate_pages(struct list_head *l, new_page_t x,
43 unsigned long private, bool offlining, 16 unsigned long private, bool offlining,
44 enum migrate_mode mode, int reason); 17 bool sync);
45extern int migrate_huge_page(struct page *, new_page_t x, 18extern int migrate_huge_pages(struct list_head *l, new_page_t x,
46 unsigned long private, bool offlining, 19 unsigned long private, bool offlining,
47 enum migrate_mode mode); 20 bool sync);
48 21
49extern int fail_migrate_page(struct address_space *, 22extern int fail_migrate_page(struct address_space *,
50 struct page *, struct page *); 23 struct page *, struct page *);
@@ -58,15 +31,15 @@ extern void migrate_page_copy(struct page *newpage, struct page *page);
58extern int migrate_huge_page_move_mapping(struct address_space *mapping, 31extern int migrate_huge_page_move_mapping(struct address_space *mapping,
59 struct page *newpage, struct page *page); 32 struct page *newpage, struct page *page);
60#else 33#else
34#define PAGE_MIGRATION 0
61 35
62static inline void putback_lru_pages(struct list_head *l) {} 36static inline void putback_lru_pages(struct list_head *l) {}
63static inline void putback_movable_pages(struct list_head *l) {}
64static inline int migrate_pages(struct list_head *l, new_page_t x, 37static inline int migrate_pages(struct list_head *l, new_page_t x,
65 unsigned long private, bool offlining, 38 unsigned long private, bool offlining,
66 enum migrate_mode mode, int reason) { return -ENOSYS; } 39 bool sync) { return -ENOSYS; }
67static inline int migrate_huge_page(struct page *page, new_page_t x, 40static inline int migrate_huge_pages(struct list_head *l, new_page_t x,
68 unsigned long private, bool offlining, 41 unsigned long private, bool offlining,
69 enum migrate_mode mode) { return -ENOSYS; } 42 bool sync) { return -ENOSYS; }
70 43
71static inline int migrate_prep(void) { return -ENOSYS; } 44static inline int migrate_prep(void) { return -ENOSYS; }
72static inline int migrate_prep_local(void) { return -ENOSYS; } 45static inline int migrate_prep_local(void) { return -ENOSYS; }
@@ -92,37 +65,4 @@ static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
92#define fail_migrate_page NULL 65#define fail_migrate_page NULL
93 66
94#endif /* CONFIG_MIGRATION */ 67#endif /* CONFIG_MIGRATION */
95
96#ifdef CONFIG_NUMA_BALANCING
97extern int migrate_misplaced_page(struct page *page, int node);
98extern int migrate_misplaced_page(struct page *page, int node);
99extern bool migrate_ratelimited(int node);
100#else
101static inline int migrate_misplaced_page(struct page *page, int node)
102{
103 return -EAGAIN; /* can't migrate now */
104}
105static inline bool migrate_ratelimited(int node)
106{
107 return false;
108}
109#endif /* CONFIG_NUMA_BALANCING */
110
111#if defined(CONFIG_NUMA_BALANCING) && defined(CONFIG_TRANSPARENT_HUGEPAGE)
112extern int migrate_misplaced_transhuge_page(struct mm_struct *mm,
113 struct vm_area_struct *vma,
114 pmd_t *pmd, pmd_t entry,
115 unsigned long address,
116 struct page *page, int node);
117#else
118static inline int migrate_misplaced_transhuge_page(struct mm_struct *mm,
119 struct vm_area_struct *vma,
120 pmd_t *pmd, pmd_t entry,
121 unsigned long address,
122 struct page *page, int node)
123{
124 return -EAGAIN;
125}
126#endif /* CONFIG_NUMA_BALANCING && CONFIG_TRANSPARENT_HUGEPAGE*/
127
128#endif /* _LINUX_MIGRATE_H */ 68#endif /* _LINUX_MIGRATE_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-04 01:27:52 -0400