From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 522F0C0018C for ; Wed, 16 Dec 2020 18:47:02 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D898E233F6 for ; Wed, 16 Dec 2020 18:47:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D898E233F6 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 5D2F58D0006; Wed, 16 Dec 2020 13:47:01 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 55F478D0002; Wed, 16 Dec 2020 13:47:01 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4214C8D0006; Wed, 16 Dec 2020 13:47:01 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0198.hostedemail.com [216.40.44.198]) by kanga.kvack.org (Postfix) with ESMTP id 2AF4D8D0002 for ; Wed, 16 Dec 2020 13:47:01 -0500 (EST) Received: from smtpin27.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id E065C1EE6 for ; Wed, 16 Dec 2020 18:47:00 +0000 (UTC) X-FDA: 77600027400.27.elbow69_61083292742e Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin27.hostedemail.com (Postfix) with ESMTP id BF9D33D663 for ; Wed, 16 Dec 2020 18:47:00 +0000 (UTC) X-HE-Tag: elbow69_61083292742e X-Filterd-Recvd-Size: 2958 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf09.hostedemail.com (Postfix) with ESMTP for ; Wed, 16 Dec 2020 18:47:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=l2yMUgDCI85xqTDbJL6qkzRnWESJ2wANbKuBp7hynpE=; b=N/MwXharVyk8/YOc7Gnjzvatp+ oAKvIXPmZVOQH06p52yHNS8oPU4kY5thhs5sTkbaPgLlx/tz7uBh7KsM98ZoILRNyU21Fgrit1E6n 3TfK5cDtNCDS5Dk5kjGUcIn0oBTVvNjYjmD6JFVgbUIYtmTw69cf+P5Z1jjn8H/TNJOR6Nrns4Ilj eyWyog1y4+7xgAq7Fvo2l6No/1EXSbCCeFnPZwqTYOFDcqg+Ctzdy7uOvK1UCD3FDWPkZoGDn1pEw vKq95ikvtohkTqhWvPEGzxVh/Jhujk0bvt6bbusjsX81ALw+foPjxiTL0gHj0hg6bUkaoO1FJ8XIe /GRnrrSA==; Received: from willy by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kpbSb-000761-5u; Wed, 16 Dec 2020 18:23:37 +0000 From: "Matthew Wilcox (Oracle)" To: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Cc: "Matthew Wilcox (Oracle)" , linux-kernel@vger.kernel.org Subject: [PATCH 02/25] mm: Add put_folio Date: Wed, 16 Dec 2020 18:23:12 +0000 Message-Id: <20201216182335.27227-3-willy@infradead.org> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20201216182335.27227-1-willy@infradead.org> References: <20201216182335.27227-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: If we know we have a folio, we can call put_folio() instead of put_page() and save the overhead of calling compound_head(). Also skips the devmap checks. Signed-off-by: Matthew Wilcox (Oracle) --- include/linux/mm.h | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index ed20fd0c6169..a9191dc250a6 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1194,9 +1194,15 @@ static inline __must_check bool try_get_page(struc= t page *page) return true; } =20 +static inline void put_folio(struct folio *folio) +{ + if (put_page_testzero(&folio->page)) + __put_page(&folio->page); +} + static inline void put_page(struct page *page) { - page =3D compound_head(page); + struct folio *folio =3D page_folio(page); =20 /* * For devmap managed pages we need to catch refcount transition from @@ -1204,13 +1210,12 @@ static inline void put_page(struct page *page) * need to inform the device driver through callback. See * include/linux/memremap.h and HMM for details. */ - if (page_is_devmap_managed(page)) { - put_devmap_managed_page(page); + if (page_is_devmap_managed(&folio->page)) { + put_devmap_managed_page(&folio->page); return; } =20 - if (put_page_testzero(page)) - __put_page(page); + put_folio(folio); } =20 /* --=20 2.29.2