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From:   Miaohe Lin <linmiaohe@huawei.com>
To:     <akpm@linux-foundation.org>
CC:     <ying.huang@intel.com>, <songmuchun@bytedance.com>,
        <hch@infradead.org>, <willy@infradead.org>, <linux-mm@kvack.org>,
        <linux-kernel@vger.kernel.org>, <linmiaohe@huawei.com>
Subject: [PATCH v2 5/9] mm/vmscan: activate swap-backed executable folios after first usage
Date:   Sat, 9 Apr 2022 17:34:56 +0800
Message-ID: <20220409093500.10329-6-linmiaohe@huawei.com>
In-Reply-To: <20220409093500.10329-1-linmiaohe@huawei.com>
References: <20220409093500.10329-1-linmiaohe@huawei.com>
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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.

Suggested-by: Huang, Ying <ying.huang@intel.com>
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
---
 mm/vmscan.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 0e5818970998..cc1193e320c2 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1412,9 +1412,9 @@ static enum page_references folio_check_references(struct folio *folio,
 			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;
-- 
2.23.0