If we have to avoid migrating to a node that is nearly full, put page and return zero.
Signed-off-by: Hillf Danton <[email protected]> Signed-off-by: Mel Gorman <[email protected]> --- mm/migrate.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/mm/migrate.c b/mm/migrate.c index a2c4567..49878d7 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1489,18 +1489,21 @@ int migrate_misplaced_page(struct page *page, int node) } isolated = 1; - /* - * Page is isolated which takes a reference count so now the - * callers reference can be safely dropped without the page - * disappearing underneath us during migration - */ - put_page(page); - page_lru = page_is_file_cache(page); inc_zone_page_state(page, NR_ISOLATED_ANON + page_lru); list_add(&page->lru, &migratepages); } + /* + * Page is either isolated or there is not enough space on the target + * node. If isolated, then it has taken a reference count and the + * callers reference can be safely dropped without the page + * disappearing underneath us during migration. Otherwise the page is + * not to be migrated but the callers reference should still be + * dropped so it does not leak. + */ + put_page(page); + if (isolated) { int nr_remaining; -- 1.7.9.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
