Commit 0b175468 authored by Miaohe Lin's avatar Miaohe Lin Committed by Andrew Morton
Browse files

mm/huge_memory: try to free subpage in swapcache when possible 

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.

Link: https://lkml.kernel.org/r/20220704132201.14611-12-linmiaohe@huawei.com


Signed-off-by: default avatarMiaohe Lin <linmiaohe@huawei.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Zach O'Keefe <zokeefe@google.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 3ce4fee4

mm/huge_memory.c

+1 −1
Original line number Diff line number Diff line
@@ -2538,7 +2538,7 @@ 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);

	}

}