diff options
Diffstat (limited to 'mm/migrate.c')
-rw-r--r-- | mm/migrate.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index d313737..61f14a1 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -949,6 +949,16 @@ static int unmap_and_move_huge_page(new_page_t get_new_page, struct page *new_hpage = get_new_page(hpage, private, &result); struct anon_vma *anon_vma = NULL; + /* + * Movability of hugepages depends on architectures and hugepage size. + * This check is necessary because some callers of hugepage migration + * like soft offline and memory hotremove don't walk through page + * tables or check whether the hugepage is pmd-based or not before + * kicking migration. + */ + if (!hugepage_migration_support(page_hstate(hpage))) + return -ENOSYS; + if (!new_hpage) return -ENOMEM; |