diff options
Diffstat (limited to 'mm/migrate.c')
| -rw-r--r-- | mm/migrate.c | 30 |
1 files changed, 24 insertions, 6 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index 1c2a71aa05c..3f1e0c2c942 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -616,15 +616,13 @@ static int unmap_and_move(new_page_t get_new_page, unsigned long private, /* * Establish migration ptes or remove ptes */ - if (try_to_unmap(page, 1) != SWAP_FAIL) { - if (!page_mapped(page)) - rc = move_to_new_page(newpage, page); - } else - /* A vma has VM_LOCKED set -> permanent failure */ - rc = -EPERM; + try_to_unmap(page, 1); + if (!page_mapped(page)) + rc = move_to_new_page(newpage, page); if (rc) remove_migration_ptes(page, page); + unlock: unlock_page(page); @@ -976,3 +974,23 @@ 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; +} |