From patchwork Mon Feb 27 17:57:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 62080 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:5915:0:0:0:0:0 with SMTP id v21csp2563849wrd; Mon, 27 Feb 2023 10:03:50 -0800 (PST) X-Google-Smtp-Source: AK7set/KK7RmJM1+c46p2U6pRusqUntybpOHCNRVBIwKPN0P8AnaklqYyrhI60KgfZxGYsebYWDa X-Received: by 2002:aa7:8ecc:0:b0:5a9:b910:6d98 with SMTP id b12-20020aa78ecc000000b005a9b9106d98mr23943994pfr.13.1677521030534; Mon, 27 Feb 2023 10:03:50 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1677521030; cv=none; d=google.com; s=arc-20160816; b=CUUcC2QBtdcApY7OrXNu+bdjn4Itbe4Pmosb0rstkTm2YgqYW6xWlatr3kds4xps5S qISA6G7SmuUL1d5gU+AAYWaXeov8iEppyrnJmPb0XwseYpFBNZTxg+vw2n/rSos9p+TA bYqRgOaM4wezsKrz1XonFPe4QqGkAD0lPll9RMCPHbS1m4PhoQ3uDSkgkMbMDU9U20T9 ZbGHYaDsrt0KyGRvoSct4YOK/lFv6E7ErJFGxRue+IonKbDHrV+EMHGJzDltMCVRfC24 WurOquT4wCQyrMW9mZB3+fV4o0KN/u0Icbuazn0aggjdC7yFDQQ6DpdPxkOV5BDsXp9E h/yg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=y0P5OnBh3qG6d3noGaCIYdmYizhMJwO+EWfJPW8MG4E=; b=jZVKXVrNl2YQRDd6mvTdERiVpyNH4Doh33JJzeaeoBuhDlbM2SO4O3MKIejW89UOLI +fu3zX6zyHHatpM1g/is6q/Rz2OUpru0duVOGl7fE5YTpvDjzKU53pPNg5tE8xBgx/ZF nTCxWUqo0dENzNyLJd1dw6V2a8yGmSuF7TxrMx+y0JGOeNhZPWqgQ2/zdyC0krjElMW3 Zmo/09RMhjE4WP+iXhKfn0Xr2PaVNRMduvPZc1ZNM2Zmxz9NdS0Clwt8AogLJzIOYTix MB0oHbYCJdeYUZO7KRMpB7581uamQYNOJAaofLxMCFELrGVTWKt5bmYMKdKEx2SSFDpH r2Yg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@infradead.org header.s=casper.20170209 header.b=jwBU661f; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id k3-20020aa79d03000000b00593cda276b6si7339762pfp.322.2023.02.27.10.03.37; Mon, 27 Feb 2023 10:03:50 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=casper.20170209 header.b=jwBU661f; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230344AbjB0R7a (ORCPT + 99 others); Mon, 27 Feb 2023 12:59:30 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48850 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230339AbjB0R6Y (ORCPT ); Mon, 27 Feb 2023 12:58:24 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C10F493E5; Mon, 27 Feb 2023 09:57:58 -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=y0P5OnBh3qG6d3noGaCIYdmYizhMJwO+EWfJPW8MG4E=; b=jwBU661fwhRTx2pgFu1JSo99dB erx3YENzwwMH9d3DroGaXG1W3RItbbfo9N/DjwKcMsslZ1iA6/kEJdx+svqAVHunopbTc0MdNpb0S MteRpNQE6UgvDKVAx1XMc6ulBgvJsz+MAWxgHoDDWFBdTxcsw+yg1D/7VIIyDKKMXMOEwc0IYLpjh lPWUaQDHTUSju4AzIT8dPRw6m37hGC2S3p0Zl3MJRTZCL3YDPoE2LSA9gebfbdxhGX7Au2L83t6du d87poBinrfCUnYaWN/yhrROEAEFY65qWz9g7vhEBHUv6K5uX5RzrKDPcQd9TWEtay0u2DbvEG8pfC ScoXa+cg==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1pWhkw-000IZ5-QH; Mon, 27 Feb 2023 17:57:46 +0000 From: "Matthew Wilcox (Oracle)" To: linux-mm@kvack.org, linux-arch@vger.kernel.org Cc: Yin Fengwei , linux-kernel@vger.kernel.org, Matthew Wilcox Subject: [PATCH v2 28/30] rmap: add folio_add_file_rmap_range() Date: Mon, 27 Feb 2023 17:57:39 +0000 Message-Id: <20230227175741.71216-29-willy@infradead.org> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20230227175741.71216-1-willy@infradead.org> References: <20230227175741.71216-1-willy@infradead.org> MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1759008292157257029?= X-GMAIL-MSGID: =?utf-8?q?1759008292157257029?= From: Yin Fengwei folio_add_file_rmap_range() allows to add pte mapping to a specific range of file folio. Comparing to page_add_file_rmap(), it batched updates __lruvec_stat for large folio. Signed-off-by: Yin Fengwei Signed-off-by: Matthew Wilcox (Oracle) --- include/linux/rmap.h | 2 ++ mm/rmap.c | 60 +++++++++++++++++++++++++++++++++----------- 2 files changed, 48 insertions(+), 14 deletions(-) diff --git a/include/linux/rmap.h b/include/linux/rmap.h index b87d01660412..a3825ce81102 100644 --- a/include/linux/rmap.h +++ b/include/linux/rmap.h @@ -198,6 +198,8 @@ void folio_add_new_anon_rmap(struct folio *, struct vm_area_struct *, unsigned long address); void page_add_file_rmap(struct page *, struct vm_area_struct *, bool compound); +void folio_add_file_rmap_range(struct folio *, struct page *, unsigned int nr, + struct vm_area_struct *, bool compound); void page_remove_rmap(struct page *, struct vm_area_struct *, bool compound); diff --git a/mm/rmap.c b/mm/rmap.c index bacdb795d5ee..fffdb85a3b3d 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -1303,31 +1303,39 @@ void folio_add_new_anon_rmap(struct folio *folio, struct vm_area_struct *vma, } /** - * page_add_file_rmap - add pte mapping to a file page - * @page: the page to add the mapping to + * folio_add_file_rmap_range - add pte mapping to page range of a folio + * @folio: The folio to add the mapping to + * @page: The first page to add + * @nr_pages: The number of pages which will be mapped * @vma: the vm area in which the mapping is added * @compound: charge the page as compound or small page * + * The page range of folio is defined by [first_page, first_page + nr_pages) + * * The caller needs to hold the pte lock. */ -void page_add_file_rmap(struct page *page, struct vm_area_struct *vma, - bool compound) +void folio_add_file_rmap_range(struct folio *folio, struct page *page, + unsigned int nr_pages, struct vm_area_struct *vma, + bool compound) { - struct folio *folio = page_folio(page); atomic_t *mapped = &folio->_nr_pages_mapped; - int nr = 0, nr_pmdmapped = 0; - bool first; + unsigned int nr_pmdmapped = 0, first; + int nr = 0; - VM_BUG_ON_PAGE(compound && !PageTransHuge(page), page); + VM_WARN_ON_FOLIO(compound && !folio_test_pmd_mappable(folio), folio); /* Is page being mapped by PTE? Is this its first map to be added? */ if (likely(!compound)) { - first = atomic_inc_and_test(&page->_mapcount); - nr = first; - if (first && folio_test_large(folio)) { - nr = atomic_inc_return_relaxed(mapped); - nr = (nr < COMPOUND_MAPPED); - } + do { + first = atomic_inc_and_test(&page->_mapcount); + if (first && folio_test_large(folio)) { + first = atomic_inc_return_relaxed(mapped); + first = (nr < COMPOUND_MAPPED); + } + + if (first) + nr++; + } while (page++, --nr_pages > 0); } else if (folio_test_pmd_mappable(folio)) { /* That test is redundant: it's for safety or to optimize out */ @@ -1356,6 +1364,30 @@ void page_add_file_rmap(struct page *page, struct vm_area_struct *vma, mlock_vma_folio(folio, vma, compound); } +/** + * page_add_file_rmap - add pte mapping to a file page + * @page: the page to add the mapping to + * @vma: the vm area in which the mapping is added + * @compound: charge the page as compound or small page + * + * The caller needs to hold the pte lock. + */ +void page_add_file_rmap(struct page *page, struct vm_area_struct *vma, + bool compound) +{ + struct folio *folio = page_folio(page); + unsigned int nr_pages; + + VM_WARN_ON_ONCE_PAGE(compound && !PageTransHuge(page), page); + + if (likely(!compound)) + nr_pages = 1; + else + nr_pages = folio_nr_pages(folio); + + folio_add_file_rmap_range(folio, page, nr_pages, vma, compound); +} + /** * page_remove_rmap - take down pte mapping from a page * @page: page to remove mapping from