From patchwork Thu Jul 15 20:00:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 12381089 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 869D6C636CA for ; Thu, 15 Jul 2021 20:39:40 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 3D4E4613D9 for ; Thu, 15 Jul 2021 20:39:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3D4E4613D9 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 96F318D00F6; Thu, 15 Jul 2021 16:39:40 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 8F8448D00EC; Thu, 15 Jul 2021 16:39:40 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 798FE8D00F6; Thu, 15 Jul 2021 16:39:40 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 4B6258D00EC for ; Thu, 15 Jul 2021 16:39:40 -0400 (EDT) Received: from smtpin36.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 30B77274C6 for ; Thu, 15 Jul 2021 20:39:39 +0000 (UTC) X-FDA: 78365988078.36.B74AB69 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf24.hostedemail.com (Postfix) with ESMTP id E658CB000802 for ; Thu, 15 Jul 2021 20:39:38 +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=iQqpnTwxqRXjD5hes7UseJQTEUIrkCuby3ucZ182rzs=; b=uitKHfs4H4unpnN+CyQ+ciCnHD ugtp6nC6T3j5xuzinFXn0KNevuOZXhhV1diCij61FWBE5V3P1BvUzz0RsQ1ALQz/7zaVWfRUG0Qil ehEEoBTOSLRO33ey/rJqwY0DRsRkb48OIXf+GNaTbwDC8sfOXVWI3aMkARGnkdHc0sbdQT6PpnBUj v67qvTEHXIwV4RgVgJtA8jlp+w6RB89/A/UXkw0yb9Br+/U3ZXC+TOQc/BwXauoWlRqzqGbqwzrj1 YH5EH6BKmgC0VXxHf6s9Hv7dRSEHc+3w6u1AVPAEnTg2Af0PeyudfP+Ia4BPqJL8jgdvsQvJ2/PNY s2EgM79A==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1m481R-003qBz-9S; Thu, 15 Jul 2021 20:32:18 +0000 From: "Matthew Wilcox (Oracle)" To: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , Christoph Hellwig Subject: [PATCH v14 31/39] mm: Add folio_evictable() Date: Thu, 15 Jul 2021 21:00:22 +0100 Message-Id: <20210715200030.899216-32-willy@infradead.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210715200030.899216-1-willy@infradead.org> References: <20210715200030.899216-1-willy@infradead.org> MIME-Version: 1.0 Authentication-Results: imf24.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=uitKHfs4; spf=none (imf24.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org; dmarc=none X-Stat-Signature: h336mmcom4yg59saniewi9hqxygn1ap5 X-Rspamd-Queue-Id: E658CB000802 X-Rspamd-Server: rspam01 X-HE-Tag: 1626381578-680052 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: This is the folio equivalent of page_evictable(). Unfortunately, it's different from !folio_test_unevictable(), but I think it's used in places where you have to be a VM expert and can reasonably be expected to know the difference. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig --- mm/internal.h | 27 +++++++++++++++++++-------- 1 file changed, 19 insertions(+), 8 deletions(-) diff --git a/mm/internal.h b/mm/internal.h index 08e8a28994d1..0910efec5821 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -72,17 +72,28 @@ unsigned find_lock_entries(struct address_space *mapping, pgoff_t start, pgoff_t end, struct pagevec *pvec, pgoff_t *indices); /** - * page_evictable - test whether a page is evictable - * @page: the page to test + * folio_evictable - Test whether a folio is evictable. + * @folio: The folio to test. * - * Test whether page is evictable--i.e., should be placed on active/inactive - * lists vs unevictable list. - * - * Reasons page might not be evictable: - * (1) page's mapping marked unevictable - * (2) page is part of an mlocked VMA + * Test whether @folio is evictable -- i.e., should be placed on + * active/inactive lists vs unevictable list. * + * Reasons folio might not be evictable: + * 1. folio's mapping marked unevictable + * 2. One of the pages in the folio is part of an mlocked VMA */ +static inline bool folio_evictable(struct folio *folio) +{ + bool ret; + + /* Prevent address_space of inode and swap cache from being freed */ + rcu_read_lock(); + ret = !mapping_unevictable(folio_mapping(folio)) && + !folio_test_mlocked(folio); + rcu_read_unlock(); + return ret; +} + static inline bool page_evictable(struct page *page) { bool ret;