diff options
| -rw-r--r-- | include/linux/mempolicy.h | 19 | ||||
| -rw-r--r-- | include/linux/migrate.h | 21 | ||||
| -rw-r--r-- | mm/Kconfig | 2 | ||||
| -rw-r--r-- | mm/migrate.c | 2 |
4 files changed, 21 insertions, 23 deletions
diff --git a/include/linux/mempolicy.h b/include/linux/mempolicy.h index 3a39570b81b..085c903fe0f 100644 --- a/include/linux/mempolicy.h +++ b/include/linux/mempolicy.h @@ -59,6 +59,7 @@ enum { #include <linux/rbtree.h> #include <linux/spinlock.h> #include <linux/nodemask.h> +#include <linux/pagemap.h> struct mm_struct; @@ -220,6 +221,24 @@ extern int mpol_parse_str(char *str, struct mempolicy **mpol, int no_context); extern int mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol, int no_context); #endif + +/* Check if a vma is migratable */ +static inline int vma_migratable(struct vm_area_struct *vma) +{ + if (vma->vm_flags & (VM_IO|VM_HUGETLB|VM_PFNMAP|VM_RESERVED)) + return 0; + /* + * Migration allocates pages in the highest zone. If we cannot + * do so then migration (at least from node to node) is not + * possible. + */ + if (vma->vm_file && + gfp_zone(mapping_gfp_mask(vma->vm_file->f_mapping)) + < policy_zone) + return 0; + return 1; +} + #else struct mempolicy {}; diff --git a/include/linux/migrate.h b/include/linux/migrate.h index e10a90a93b5..03aea612d28 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -3,28 +3,10 @@ #include <linux/mm.h> #include <linux/mempolicy.h> -#include <linux/pagemap.h> typedef struct page *new_page_t(struct page *, unsigned long private, int **); #ifdef CONFIG_MIGRATION -/* Check if a vma is migratable */ -static inline int vma_migratable(struct vm_area_struct *vma) -{ - if (vma->vm_flags & (VM_IO|VM_HUGETLB|VM_PFNMAP|VM_RESERVED)) - return 0; - /* - * Migration allocates pages in the highest zone. If we cannot - * do so then migration (at least from node to node) is not - * possible. - */ - if (vma->vm_file && - gfp_zone(mapping_gfp_mask(vma->vm_file->f_mapping)) - < policy_zone) - return 0; - return 1; -} - extern int isolate_lru_page(struct page *p, struct list_head *pagelist); extern int putback_lru_pages(struct list_head *l); extern int migrate_page(struct address_space *, @@ -39,9 +21,6 @@ extern int migrate_vmas(struct mm_struct *mm, const nodemask_t *from, const nodemask_t *to, unsigned long flags); #else -static inline int vma_migratable(struct vm_area_struct *vma) - { return 0; } - static inline int isolate_lru_page(struct page *p, struct list_head *list) { return -ENOSYS; } static inline int putback_lru_pages(struct list_head *l) { return 0; } diff --git a/mm/Kconfig b/mm/Kconfig index c4de85285bb..aa799007a11 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -174,7 +174,7 @@ config SPLIT_PTLOCK_CPUS config MIGRATION bool "Page migration" def_bool y - depends on NUMA + depends on NUMA || ARCH_ENABLE_MEMORY_HOTREMOVE help Allows the migration of the physical location of pages of processes while the virtual addresses are not changed. This is useful for diff --git a/mm/migrate.c b/mm/migrate.c index e7d13a708da..376cceba82f 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1071,7 +1071,6 @@ out2: mmput(mm); return err; } -#endif /* * Call migration functions in the vma_ops that may prepare @@ -1093,3 +1092,4 @@ int migrate_vmas(struct mm_struct *mm, const nodemask_t *to, } return err; } +#endif |