diff options
Diffstat (limited to 'mm/migrate.c')
| -rw-r--r-- | mm/migrate.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index aec0774d3da3..90ddf906d706 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -43,6 +43,8 @@ #include <linux/sched/sysctl.h> #include <linux/memory-tiers.h> #include <linux/pagewalk.h> +#include <linux/balloon_compaction.h> +#include <linux/zsmalloc.h> #include <asm/tlbflush.h> @@ -51,6 +53,27 @@ #include "internal.h" #include "swap.h" +static const struct movable_operations *page_movable_ops(struct page *page) +{ + VM_WARN_ON_ONCE_PAGE(!page_has_movable_ops(page), page); + + /* + * If we enable page migration for a page of a certain type by marking + * it as movable, the page type must be sticky until the page gets freed + * back to the buddy. + */ +#ifdef CONFIG_BALLOON_COMPACTION + if (PageOffline(page)) + /* Only balloon compaction sets PageOffline pages movable. */ + return &balloon_mops; +#endif /* CONFIG_BALLOON_COMPACTION */ +#if defined(CONFIG_ZSMALLOC) && defined(CONFIG_COMPACTION) + if (PageZsmalloc(page)) + return &zsmalloc_mops; +#endif /* defined(CONFIG_ZSMALLOC) && defined(CONFIG_COMPACTION) */ + return NULL; +} + /** * isolate_movable_ops_page - isolate a movable_ops page for migration * @page: The page. |