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=-18.8 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,USER_AGENT_GIT autolearn=unavailable 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 609A6C1B08C for ; Thu, 15 Jul 2021 04:43:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3F9B361360 for ; Thu, 15 Jul 2021 04:43:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237646AbhGOEqk (ORCPT ); Thu, 15 Jul 2021 00:46:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60214 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230256AbhGOEqj (ORCPT ); Thu, 15 Jul 2021 00:46:39 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BA4D2C06175F; Wed, 14 Jul 2021 21:43:46 -0700 (PDT) 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=HSemhOs8qSh2odWZyzlZyc6k0t pdrnQ0jZetOK93lZIS4GqKdcF0ZyPZ79pZIygckXG0ejxbNu3ilkL6GXk/D6KAb56LkIFr+KyYNoF 1LaPgydRnMB93/n20oGLf1aAUp0WabmuZjyat32s/H15rz+Rf02BLC1xfuuWa78l5oXn248VONoyt u40VH2hARHWP6BvNlrSljfi9bJBgJ+0kWUeIk3noMALA0zI+xYe7I6jRJoUdf05OEoNw1M5Q6IVYF m+v+Zoqgg1XyoMb2beO+xwJ36dwGCEAweguvpn+XYktu8IjDKkUXCkjAdNMvbeG3sfLZxNuqoVLk8 0nSvwM/w==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1m3tCA-002yHx-OE; Thu, 15 Jul 2021 04:42:08 +0000 From: "Matthew Wilcox (Oracle)" To: linux-kernel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Christoph Hellwig Subject: [PATCH v14 081/138] mm: Add folio_evictable() Date: Thu, 15 Jul 2021 04:36:07 +0100 Message-Id: <20210715033704.692967-82-willy@infradead.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210715033704.692967-1-willy@infradead.org> References: <20210715033704.692967-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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; -- 2.30.2