[PATCH v1 08/29] mm/migrate: rename putback_movable_folio() to putback_movable_ops_page()
From: David Hildenbrand <hidden>
Date: 2025-06-30 13:00:42
Also in:
linux-doc, linux-fsdevel, linux-mm, linuxppc-dev, lkml
Subsystem:
memory management, memory management - memory policy and migration, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
... and factor the complete handling of movable_ops pages out. Convert it similar to isolate_movable_ops_page(). While at it, convert the VM_BUG_ON_FOLIO() into a VM_WARN_ON_PAGE(). Signed-off-by: David Hildenbrand <redacted> --- mm/migrate.c | 37 ++++++++++++++++++++++++------------- 1 file changed, 24 insertions(+), 13 deletions(-)
diff --git a/mm/migrate.c b/mm/migrate.c
index d4b4a7eefb6bd..d97f7cd137e63 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c@@ -133,12 +133,30 @@ bool isolate_movable_ops_page(struct page *page, isolate_mode_t mode) return false; } -static void putback_movable_folio(struct folio *folio) +/** + * putback_movable_ops_page - putback an isolated movable_ops page + * @page: The isolated page. + * + * Putback an isolated movable_ops page. + * + * After the page was putback, it might get freed instantly. + */ +static void putback_movable_ops_page(struct page *page) { - const struct movable_operations *mops = folio_movable_ops(folio); - - mops->putback_page(&folio->page); - folio_clear_isolated(folio); + /* + * TODO: these pages will not be folios in the future. All + * folio dependencies will have to be removed. + */ + struct folio *folio = page_folio(page); + + VM_WARN_ON_ONCE_PAGE(!PageIsolated(page), page); + folio_lock(folio); + /* If the page was released by it's owner, there is nothing to do. */ + if (PageMovable(page)) + page_movable_ops(page)->putback_page(page); + ClearPageIsolated(page); + folio_unlock(folio); + folio_put(folio); } /*
@@ -166,14 +184,7 @@ void putback_movable_pages(struct list_head *l) * have PAGE_MAPPING_MOVABLE. */ if (unlikely(__folio_test_movable(folio))) { - VM_BUG_ON_FOLIO(!folio_test_isolated(folio), folio); - folio_lock(folio); - if (folio_test_movable(folio)) - putback_movable_folio(folio); - else - folio_clear_isolated(folio); - folio_unlock(folio); - folio_put(folio); + putback_movable_ops_page(&folio->page); } else { node_stat_mod_folio(folio, NR_ISOLATED_ANON + folio_is_file_lru(folio), -folio_nr_pages(folio));
--
2.49.0