Subpages in swapcache won't be freed even if it is the last user of the page until next time reclaim. It shouldn't hurt indeed, but we could try to free these pages to save more memory for system. Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx> --- mm/huge_memory.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index fd12fa930937..506e7a682780 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2539,7 +2539,7 @@ static void __split_huge_page(struct page *page, struct list_head *list, * requires taking the lru_lock so we do the put_page * of the tail pages after the split is complete. */ - put_page(subpage); + free_page_and_swap_cache(subpage); } } -- 2.23.0
