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,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 E0512C4167B for ; Tue, 8 Dec 2020 19:47:05 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 7599223C17 for ; Tue, 8 Dec 2020 19:47:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7599223C17 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 A69576B005D; Tue, 8 Dec 2020 14:47:02 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 9D1256B006C; Tue, 8 Dec 2020 14:47:02 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 70B036B0068; Tue, 8 Dec 2020 14:47:02 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0037.hostedemail.com [216.40.44.37]) by kanga.kvack.org (Postfix) with ESMTP id 511AD6B005D for ; Tue, 8 Dec 2020 14:47:02 -0500 (EST) Received: from smtpin11.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 134DF3628 for ; Tue, 8 Dec 2020 19:47:02 +0000 (UTC) X-FDA: 77571148284.11.pain12_300d797273e9 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin11.hostedemail.com (Postfix) with ESMTP id DF0DE180F8B80 for ; Tue, 8 Dec 2020 19:47:01 +0000 (UTC) X-HE-Tag: pain12_300d797273e9 X-Filterd-Recvd-Size: 2962 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf48.hostedemail.com (Postfix) with ESMTP for ; Tue, 8 Dec 2020 19:46:59 +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=OBRZ5khcW9DTJib4sejfdcqxs/Ms3DkVSu08A7XMxMo=; b=e5HzxTpqSfCxo8BAzX4WhMvbOc CMQJ2Cs/JtSeAJJqIQXMhuK82i/EmNbQLFVI3DD41borkTuwJJnk9GOw3lSYQgWfd5dKUXd9T5kUh xX0V0X6+TgsZvIsIr2lRh1N/LNBIqzZa3kNL/O+g5HmWLExgD29KorE3blrRtJH6bbpTeethEZQT3 B22ZuGbOv00dFtfc+YlXSJSwVyL+Xku4NwHiFqob1SCTlsPx9mHlVrVLJaRkAEBHyLQUaXxu42WAN pGmBCOpNRDfVwazXrK7rxjOrMeqY/RXP8d+jyj57whX8PzZUwrxs5d4oU+eV89AZey3wEqIyWXwOU 6485/XNg==; Received: from willy by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kmiwr-00050H-SY; Tue, 08 Dec 2020 19:46:58 +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: [RFC PATCH 02/11] mm: Add put_folio Date: Tue, 8 Dec 2020 19:46:44 +0000 Message-Id: <20201208194653.19180-3-willy@infradead.org> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20201208194653.19180-1-willy@infradead.org> References: <20201208194653.19180-1-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 7db9a10f084b..80d38cc9561c 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1189,9 +1189,15 @@ 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 @@ -1199,13 +1205,12 @@ 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