From patchwork Mon Jun 26 17:14:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ryan Roberts X-Patchwork-Id: 13293233 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4B2F2EB64D7 for ; Mon, 26 Jun 2023 17:14:57 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id DFE668D0008; Mon, 26 Jun 2023 13:14:56 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id DAC8C8D0001; Mon, 26 Jun 2023 13:14:56 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C74E38D0008; Mon, 26 Jun 2023 13:14:56 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id B4A708D0001 for ; Mon, 26 Jun 2023 13:14:56 -0400 (EDT) Received: from smtpin24.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 3C6781C7ECB for ; Mon, 26 Jun 2023 17:14:56 +0000 (UTC) X-FDA: 80945548992.24.D287448 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf13.hostedemail.com (Postfix) with ESMTP id 59D652002F for ; Mon, 26 Jun 2023 17:14:54 +0000 (UTC) Authentication-Results: imf13.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=arm.com; spf=pass (imf13.hostedemail.com: domain of ryan.roberts@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=ryan.roberts@arm.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1687799694; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=JK++ZwPDFjFzL1t38tJLvARD4YCY0yS3OUbZtrWhuTw=; b=3wriQVhHOkrpGHULt9bSGmUKEj9BoHgZW5OPd9OrXoS5suxFFXzujwtJ8iJjkZOK0kllTB DZTBOGyBS+VZ3J4PWsCvF1s+eyYBmFmDng1p8ie7VF0zwDrruAyo3lvlLS/GzxL7ni91Dc Xh8PFY5cmvEYCUKPQjMsOuRgrsfzHRc= ARC-Authentication-Results: i=1; imf13.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=arm.com; spf=pass (imf13.hostedemail.com: domain of ryan.roberts@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=ryan.roberts@arm.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1687799694; a=rsa-sha256; cv=none; b=Y/X7CaS3gRoTW4XYFXg+RnyiVmtdvTWrnfp3Q9wggYZO8XEa2ek/7Awb1LV3CNEpJ7ErFk bZOGdHHzs8UK3TCdKVK5H5RVkv5GTBtx8eRq1CFABPS+/nlrwa8hnKwY4o27BWpr9qIJ06 XDkKrZ8PxceLL5dHkjYDw70VVhlaFJM= Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 7835F1480; Mon, 26 Jun 2023 10:15:37 -0700 (PDT) Received: from e125769.cambridge.arm.com (e125769.cambridge.arm.com [10.1.196.26]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 8F06B3F663; Mon, 26 Jun 2023 10:14:50 -0700 (PDT) From: Ryan Roberts To: Andrew Morton , "Matthew Wilcox (Oracle)" , "Kirill A. Shutemov" , Yin Fengwei , David Hildenbrand , Yu Zhao , Catalin Marinas , Will Deacon , Geert Uytterhoeven , Christian Borntraeger , Sven Schnelle , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" Cc: Ryan Roberts , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-s390@vger.kernel.org Subject: [PATCH v1 04/10] mm: Implement folio_add_new_anon_rmap_range() Date: Mon, 26 Jun 2023 18:14:24 +0100 Message-Id: <20230626171430.3167004-5-ryan.roberts@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230626171430.3167004-1-ryan.roberts@arm.com> References: <20230626171430.3167004-1-ryan.roberts@arm.com> MIME-Version: 1.0 X-Rspam-User: X-Stat-Signature: 59w1w7uxdh1c1e4mtpuuahzwkni6z7fw X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 59D652002F X-HE-Tag: 1687799694-300580 X-HE-Meta: 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 WD42h/8+ rWRBDzZdkeS4RMpYq9fE2153/FLTgwOfObAzQvmARj0epErgNRRVAHwxv51eo3bi2DRJO4KPaYk+50QvjU/Ynz32vNrBV7FV52wg4eUBcmElPSXhpcolZ1Ck2XE0ElvPkU0RPNhK4mttpVVYPDz3keidF3oJMiwmNuRFKQ39jfakU0kIbHKzA8t9I8eBmO42sRpS2qdFnBboN2iw= 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: Like folio_add_new_anon_rmap() but batch-rmaps a range of pages belonging to a folio, for effciency savings. All pages are accounted as small pages. Signed-off-by: Ryan Roberts --- include/linux/rmap.h | 2 ++ mm/rmap.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 45 insertions(+) diff --git a/include/linux/rmap.h b/include/linux/rmap.h index a3825ce81102..15433a3d0cbf 100644 --- a/include/linux/rmap.h +++ b/include/linux/rmap.h @@ -196,6 +196,8 @@ void page_add_new_anon_rmap(struct page *, struct vm_area_struct *, unsigned long address); void folio_add_new_anon_rmap(struct folio *, struct vm_area_struct *, unsigned long address); +void folio_add_new_anon_rmap_range(struct folio *folio, struct page *page, + int nr, struct vm_area_struct *vma, 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, diff --git a/mm/rmap.c b/mm/rmap.c index 1d8369549424..4050bcea7ae7 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -1305,6 +1305,49 @@ void folio_add_new_anon_rmap(struct folio *folio, struct vm_area_struct *vma, __page_set_anon_rmap(folio, &folio->page, vma, address, 1); } +/** + * folio_add_new_anon_rmap_range - Add mapping to a set of pages within a new + * anonymous potentially large folio. + * @folio: The folio containing the pages to be mapped + * @page: First page in the folio to be mapped + * @nr: Number of pages to be mapped + * @vma: the vm area in which the mapping is added + * @address: the user virtual address of the first page to be mapped + * + * Like folio_add_new_anon_rmap() but batch-maps a range of pages within a folio + * using non-THP accounting. Like folio_add_new_anon_rmap(), the inc-and-test is + * bypassed and the folio does not have to be locked. All pages in the folio are + * individually accounted. + * + * As the folio is new, it's assumed to be mapped exclusively by a single + * process. + */ +void folio_add_new_anon_rmap_range(struct folio *folio, struct page *page, + int nr, struct vm_area_struct *vma, unsigned long address) +{ + int i; + + VM_BUG_ON_VMA(address < vma->vm_start || + address + (nr << PAGE_SHIFT) > vma->vm_end, vma); + __folio_set_swapbacked(folio); + + if (folio_test_large(folio)) { + /* increment count (starts at 0) */ + atomic_set(&folio->_nr_pages_mapped, nr); + } + + for (i = 0; i < nr; i++) { + /* increment count (starts at -1) */ + atomic_set(&page->_mapcount, 0); + __page_set_anon_rmap(folio, page, vma, address, 1); + page++; + address += PAGE_SIZE; + } + + __lruvec_stat_mod_folio(folio, NR_ANON_MAPPED, nr); + +} + /** * folio_add_file_rmap_range - add pte mapping to page range of a folio * @folio: The folio to add the mapping to