diff options
| -rw-r--r-- | include/linux/migrate.h | 11 | ||||
| -rw-r--r-- | include/linux/mm.h | 2 | ||||
| -rw-r--r-- | mm/mempolicy.c | 6 | ||||
| -rw-r--r-- | mm/migrate.c | 20 |
4 files changed, 37 insertions, 2 deletions
diff --git a/include/linux/migrate.h b/include/linux/migrate.h index 5dba23a1c0d0..48148e0cdbd1 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -16,7 +16,9 @@ extern int fail_migrate_page(struct address_space *, struct page *, struct page *); extern int migrate_prep(void); - +extern int migrate_vmas(struct mm_struct *mm, + const nodemask_t *from, const nodemask_t *to, + unsigned long flags); #else static inline int isolate_lru_page(struct page *p, struct list_head *list) @@ -30,6 +32,13 @@ static inline int migrate_pages_to(struct list_head *pagelist, static inline int migrate_prep(void) { return -ENOSYS; } +static inline int migrate_vmas(struct mm_struct *mm, + const nodemask_t *from, const nodemask_t *to, + unsigned long flags) +{ + return -ENOSYS; +} + /* Possible settings for the migrate_page() method in address_operations */ #define migrate_page NULL #define fail_migrate_page NULL diff --git a/include/linux/mm.h b/include/linux/mm.h index 71c5d2f667ed..a929ea197e48 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -206,6 +206,8 @@ struct vm_operations_struct { int (*set_policy)(struct vm_area_struct *vma, struct mempolicy *new); struct mempolicy *(*get_policy)(struct vm_area_struct *vma, unsigned long addr); + int (*migrate)(struct vm_area_struct *vma, const nodemask_t *from, + const nodemask_t *to, unsigned long flags); #endif }; diff --git a/mm/mempolicy.c b/mm/mempolicy.c index ec4a1a950df9..73e0f23b7f51 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -632,6 +632,10 @@ int do_migrate_pages(struct mm_struct *mm, down_read(&mm->mmap_sem); + err = migrate_vmas(mm, from_nodes, to_nodes, flags); + if (err) + goto out; + /* * Find a 'source' bit set in 'tmp' whose corresponding 'dest' * bit in 'to' is not also set in 'tmp'. Clear the found 'source' @@ -691,7 +695,7 @@ int do_migrate_pages(struct mm_struct *mm, if (err < 0) break; } - +out: up_read(&mm->mmap_sem); if (err < 0) return err; diff --git a/mm/migrate.c b/mm/migrate.c index 1c2a71aa05cd..0576c0535988 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -976,3 +976,23 @@ out2: } #endif +/* + * Call migration functions in the vma_ops that may prepare + * memory in a vm for migration. migration functions may perform + * the migration for vmas that do not have an underlying page struct. + */ +int migrate_vmas(struct mm_struct *mm, const nodemask_t *to, + const nodemask_t *from, unsigned long flags) +{ + struct vm_area_struct *vma; + int err = 0; + + for(vma = mm->mmap; vma->vm_next && !err; vma = vma->vm_next) { + if (vma->vm_ops && vma->vm_ops->migrate) { + err = vma->vm_ops->migrate(vma, to, from, flags); + if (err) + break; + } + } + return err; +} |