From: Miaohe Lin <linmiaohe@huawei.com>
Subject: mm/vmscan: activate swap-backed executable folios after first usage

We should activate swap-backed executable folios (e.g.  tmpfs) after first
usage so that executable code gets yet better chance to stay in memory.

Link: https://lkml.kernel.org/r/20220425111232.23182-4-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Suggested-by: Huang, Ying <ying.huang@intel.com>
Reviewed-by: Huang, Ying <ying.huang@intel.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Oscar Salvador <osalvador@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/vmscan.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/mm/vmscan.c~mm-vmscan-activate-swap-backed-executable-folios-after-first-usage
+++ a/mm/vmscan.c
@@ -1412,9 +1412,9 @@ static enum page_references folio_check_
 			return PAGEREF_ACTIVATE;
 
 		/*
-		 * Activate file-backed executable folios after first usage.
+		 * Activate executable folios after first usage.
 		 */
-		if ((vm_flags & VM_EXEC) && !folio_test_swapbacked(folio))
+		if (vm_flags & VM_EXEC)
 			return PAGEREF_ACTIVATE;
 
 		return PAGEREF_KEEP;
_