Merge tag 'balancenuma-v11' of git://git.kernel.org/pub/scm/linux/kernel/git/mel...

[android-sdk/kernel-video.git] / include / linux / migrate.h

diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index 0b5865c61efdf704d3e0768fa0fa4910bf7a4308..1e9f627967a3b91dbf28e4fc1fbfed484820a2cd 100644 (file)
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -23,6 +23,15 @@ typedef struct page *new_page_t(struct page *, unsigned long private, int **);
 #define MIGRATEPAGE_BALLOON_SUCCESS    1 /* special ret code for balloon page
                                           * sucessful migration case.
                                           */
+enum migrate_reason {
+       MR_COMPACTION,
+       MR_MEMORY_FAILURE,
+       MR_MEMORY_HOTPLUG,
+       MR_SYSCALL,             /* also applies to cpusets */
+       MR_MEMPOLICY_MBIND,
+       MR_NUMA_MISPLACED,
+       MR_CMA
+};
 
 #ifdef CONFIG_MIGRATION
 
@@ -32,7 +41,7 @@ extern int migrate_page(struct address_space *,
                        struct page *, struct page *, enum migrate_mode);
 extern int migrate_pages(struct list_head *l, new_page_t x,
                        unsigned long private, bool offlining,
-                       enum migrate_mode mode);
+                       enum migrate_mode mode, int reason);
 extern int migrate_huge_page(struct page *, new_page_t x,
                        unsigned long private, bool offlining,
                        enum migrate_mode mode);
@@ -54,7 +63,7 @@ static inline void putback_lru_pages(struct list_head *l) {}
 static inline void putback_movable_pages(struct list_head *l) {}
 static inline int migrate_pages(struct list_head *l, new_page_t x,
                unsigned long private, bool offlining,
-               enum migrate_mode mode) { return -ENOSYS; }
+               enum migrate_mode mode, int reason) { return -ENOSYS; }
 static inline int migrate_huge_page(struct page *page, new_page_t x,
                unsigned long private, bool offlining,
                enum migrate_mode mode) { return -ENOSYS; }
@@ -83,4 +92,37 @@ static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
 #define fail_migrate_page NULL
 
 #endif /* CONFIG_MIGRATION */
+
+#ifdef CONFIG_NUMA_BALANCING
+extern int migrate_misplaced_page(struct page *page, int node);
+extern int migrate_misplaced_page(struct page *page, int node);
+extern bool migrate_ratelimited(int node);
+#else
+static inline int migrate_misplaced_page(struct page *page, int node)
+{
+       return -EAGAIN; /* can't migrate now */
+}
+static inline bool migrate_ratelimited(int node)
+{
+       return false;
+}
+#endif /* CONFIG_NUMA_BALANCING */
+
+#if defined(CONFIG_NUMA_BALANCING) && defined(CONFIG_TRANSPARENT_HUGEPAGE)
+extern int migrate_misplaced_transhuge_page(struct mm_struct *mm,
+                       struct vm_area_struct *vma,
+                       pmd_t *pmd, pmd_t entry,
+                       unsigned long address,
+                       struct page *page, int node);
+#else
+static inline int migrate_misplaced_transhuge_page(struct mm_struct *mm,
+                       struct vm_area_struct *vma,
+                       pmd_t *pmd, pmd_t entry,
+                       unsigned long address,
+                       struct page *page, int node)
+{
+       return -EAGAIN;
+}
+#endif /* CONFIG_NUMA_BALANCING && CONFIG_TRANSPARENT_HUGEPAGE*/
+
 #endif /* _LINUX_MIGRATE_H */