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[103.91.158.24]) by mx.google.com with ESMTP id n34si14408878pld.352.2019.04.03.22.48.39 for ; Wed, 03 Apr 2019 22:48:40 -0700 (PDT) Received-SPF: pass (google.com: domain of sjhuang@iluvatar.ai designates 103.91.158.24 as permitted sender) client-ip=103.91.158.24; Authentication-Results: mx.google.com; dkim=pass header.i=@iluvatar.ai header.s=key_2018 header.b="q/HyLEGS"; spf=pass (google.com: domain of sjhuang@iluvatar.ai designates 103.91.158.24 as permitted sender) smtp.mailfrom=sjhuang@iluvatar.ai; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=iluvatar.ai X-AuditID: 0a650161-773ff700000078a3-c2-5ca59ab6fcce Received: from owa.iluvatar.ai (s-10-101-1-102.iluvatar.local [10.101.1.102]) by smg.iluvatar.ai (Symantec Messaging Gateway) with SMTP id A6.63.30883.6BA95AC5; Thu, 4 Apr 2019 13:48:38 +0800 (HKT) Content-Type: text/plain DKIM-Signature: v=1; a=rsa-sha256; d=iluvatar.ai; s=key_2018; c=relaxed/relaxed; t=1554356918; h=from:subject:to:date:message-id; bh=+wsX3euaQTbnZYORNSKThK5YQHdjOBZReHK6/+C0+Oc=; b=q/HyLEGSuwoWqkw3HI87CbTcbbnKSzjhK2J1MB7oInnuw/jssdO6l9LHmjDvPxZvnPyEyQnhQ7a Z7ul5pvZLj5RuIrTOuGDgMeDzFR6GgQnn2BlK2O/I89kySsrVewFr+TZGTKzoS9Ozd8vWqQsLIH8G 8/t6gC+8L0rZCx7lYu4= Received: from hsj-Precision-5520.iluvatar.local (10.101.199.253) by S-10-101-1-102.iluvatar.local (10.101.1.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1415.2; Thu, 4 Apr 2019 13:48:38 +0800 From: Huang Shijie To: CC: , , , Huang Shijie Subject: [PATCH] mm:rmap: use the pra.mapcount to do the check Date: Thu, 4 Apr 2019 13:48:28 +0800 Message-ID: <20190404054828.2731-1-sjhuang@iluvatar.ai> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.101.199.253] X-ClientProxiedBy: S-10-101-1-105.iluvatar.local (10.101.1.105) To S-10-101-1-102.iluvatar.local (10.101.1.102) X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrCLMWRmVeSWpSXmKPExsXClcqYprtt1tIYg3PrpSzmrF/DZnHz+RwW i3tr/rNafNwf7MDisenTJHaPEzN+s3jMOxno8fHpLZYAligum5TUnMyy1CJ9uwSujCs/2QsO sVS83vGBqYHxDHMXIyeHhICJxI1399i6GLk4hAROMEo8WfCDDSTBLCAhcfDFC2aQBIvAWyaJ M8dusENUtTJJPPl7H6yKTUBDYu6Ju2CjRATkJZq+PAIq4gDqrpH48AcsLCxgJ9Hz4CYTiM0i oCLx8GoPWJxXwFyifeILJogr5CVWbzgAFReUODnzCQvIGCEBBYkXK7UgSpQkluydBVVeKDFj 4grGCYwCs5CcOgtJ9wJGplWM/MW56XqZOaVliSWJRXqJmZsYIUGZuIPxRudLvUOMAhyMSjy8 P1YviRFiTSwrrsw9xCjBwawkwuv6GijEm5JYWZValB9fVJqTWnyIUZqDRUmct2yiSYyQQHpi SWp2ampBahFMlomDU6qBKW67vFHsvUmvVN9sDTzjpVxxNHiyant3MVfAxFC7PVMbJjd8z38h /Uv63bT73v7zPax9P768V3jAas7cfCfFuPaX99oL5NlV9py+uO3MhjUPL7pvtnjU8N+Ao+2y +07WwopZSoeOqK9OFRZjEW+d/f/APBen5yorwgp3qGr8MLt90T+l8N/dU6rH/KXCrujGWO6M UZhw4MPH3iCBkOPuxzzZjv/QPiHB4tnDfezLPY5PSkyh02OOqz+tf3BB/sbhrj2Vl83+33oc tWBT8LOG2/trzgsuNTiusSEmupPte/uuyd3tN0Q2yrEeFI0zaJxpuNx50g3BizH9EnvORGWs /DbXN/bO6pwPq5MYl+1fKazEUpyRaKjFXFScCABG/mbkxwIAAA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: We have the pra.mapcount already, and there is no need to call the page_mapped() which may do some complicated computing for compound page. Signed-off-by: Huang Shijie --- mm/rmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/rmap.c b/mm/rmap.c index 76c8dfd3ae1c..6c5843dddb5a 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -850,7 +850,7 @@ int page_referenced(struct page *page, }; *vm_flags = 0; - if (!page_mapped(page)) + if (!pra.mapcount) return 0; if (!page_rmapping(page)) -- 2.17.1