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=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 E6116C3526F for ; Tue, 8 Dec 2020 20:23:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CFB7A23A53 for ; Tue, 8 Dec 2020 20:23:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728975AbgLHUW0 (ORCPT ); Tue, 8 Dec 2020 15:22:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38054 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728289AbgLHUWX (ORCPT ); Tue, 8 Dec 2020 15:22:23 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C3D34C0611D0; Tue, 8 Dec 2020 12:22:06 -0800 (PST) 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: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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(struct page *page) return true; } +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 = compound_head(page); + struct folio *folio = page_folio(page); /* * 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; } - if (put_page_testzero(page)) - __put_page(page); + put_folio(folio); } /* -- 2.29.2