diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/page-flags.h | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index a02a12e51915..92f7152a445e 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -167,10 +167,9 @@ enum pageflags { /* Remapped by swiotlb-xen. */ PG_xen_remapped = PG_owner_priv_1, - /* non-lru isolated movable page */ - PG_isolated = PG_reclaim, - #ifdef CONFIG_MIGRATION + /* movable_ops page that is isolated for migration */ + PG_movable_ops_isolated = PG_reclaim, /* this is a movable_ops page (for selected typed pages only) */ PG_movable_ops = PG_uptodate, #endif @@ -1126,8 +1125,6 @@ static inline bool folio_contain_hwpoisoned_page(struct folio *folio) bool is_free_buddy_page(const struct page *page); -PAGEFLAG(Isolated, isolated, PF_ANY); - #ifdef CONFIG_MIGRATION /* * This page is migratable through movable_ops (for selected typed pages @@ -1147,9 +1144,18 @@ PAGEFLAG(Isolated, isolated, PF_ANY); */ TESTPAGEFLAG(MovableOps, movable_ops, PF_NO_TAIL); SETPAGEFLAG(MovableOps, movable_ops, PF_NO_TAIL); +/* + * A movable_ops page has this flag set while it is isolated for migration. + * This flag primarily protects against concurrent migration attempts. + * + * Once migration ended (success or failure), the flag is cleared. The + * flag is managed by the migration core. + */ +PAGEFLAG(MovableOpsIsolated, movable_ops_isolated, PF_NO_TAIL); #else /* !CONFIG_MIGRATION */ TESTPAGEFLAG_FALSE(MovableOps, movable_ops); SETPAGEFLAG_NOOP(MovableOps, movable_ops); +PAGEFLAG_FALSE(MovableOpsIsolated, movable_ops_isolated); #endif /* CONFIG_MIGRATION */ /** |