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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 10206C47085 for ; Mon, 4 Apr 2022 21:39:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1356762AbiDDVlG (ORCPT ); Mon, 4 Apr 2022 17:41:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43770 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1380483AbiDDUQw (ORCPT ); Mon, 4 Apr 2022 16:16:52 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C65F433EAD for ; Mon, 4 Apr 2022 13:14:55 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 7FA62B819AC for ; Mon, 4 Apr 2022 20:14:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 36E37C2BBE4; Mon, 4 Apr 2022 20:14:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1649103293; bh=aT5CoZCM6N7Ni6QDgQIuuMRpTP/GXmVqu6MOYAh/x3Q=; h=Date:To:From:Subject:From; b=EMtF0+/5M2M6MP/zXmPNNXcN7gDD7Xo5keLLNYezPgD2ru++OE7SJ/+5zme9OMCBx Qg4/CK6tozeym7VNbJgs3LpNf4wVVaAa9VVNiURlxvywkX6wMcTxP1UcNv3HrTNXtk djG8cQ4Y8atv8agkoS8H/qmMBHpVa7LQ/5D8SXzo= Date: Mon, 04 Apr 2022 13:14:52 -0700 To: mm-commits@vger.kernel.org, zwisler@kernel.org, xiyuyang19@fudan.edu.cn, willy@infradead.org, viro@zeniv.linux.org.uk, shy828301@gmail.com, rcampbell@nvidia.com, kirill.shutemov@linux.intel.com, jack@suse.cz, hughd@google.com, hch@lst.de, duanxiongchun@bytedance.com, dan.j.williams@intel.com, apopple@nvidia.com, songmuchun@bytedance.com, akpm@linux-foundation.org From: Andrew Morton Subject: + mm-pvmw-add-support-for-walking-devmap-pages.patch added to -mm tree Message-Id: <20220404201453.36E37C2BBE4@smtp.kernel.org> Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The patch titled Subject: mm: pvmw: add support for walking devmap pages has been added to the -mm tree. Its filename is mm-pvmw-add-support-for-walking-devmap-pages.patch This patch should soon appear at https://ozlabs.org/~akpm/mmots/broken-out/mm-pvmw-add-support-for-walking-devmap-pages.patch and later at https://ozlabs.org/~akpm/mmotm/broken-out/mm-pvmw-add-support-for-walking-devmap-pages.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Muchun Song Subject: mm: pvmw: add support for walking devmap pages The devmap pages can not use page_vma_mapped_walk() to check if a huge devmap page is mapped into a vma. Add support for walking huge devmap pages so that DAX can use it in the next patch. Link: https://lkml.kernel.org/r/20220403053957.10770-5-songmuchun@bytedance.com Signed-off-by: Muchun Song Cc: Alistair Popple Cc: Al Viro Cc: Christoph Hellwig Cc: Dan Williams Cc: Hugh Dickins Cc: Jan Kara Cc: "Kirill A. Shutemov" Cc: Matthew Wilcox Cc: Ralph Campbell Cc: Ross Zwisler Cc: Xiongchun Duan Cc: Xiyu Yang Cc: Yang Shi Signed-off-by: Andrew Morton --- mm/page_vma_mapped.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) --- a/mm/page_vma_mapped.c~mm-pvmw-add-support-for-walking-devmap-pages +++ a/mm/page_vma_mapped.c @@ -210,16 +210,10 @@ restart: */ pmde = READ_ONCE(*pvmw->pmd); - if (pmd_trans_huge(pmde) || is_pmd_migration_entry(pmde)) { + if (pmd_trans_huge(pmde) || is_pmd_migration_entry(pmde) || + (pmd_present(pmde) && pmd_devmap(pmde))) { pvmw->ptl = pmd_lock(mm, pvmw->pmd); pmde = *pvmw->pmd; - if (likely(pmd_trans_huge(pmde))) { - if (pvmw->flags & PVMW_MIGRATION) - return not_found(pvmw); - if (!check_pmd(pmd_pfn(pmde), pvmw)) - return not_found(pvmw); - return true; - } if (!pmd_present(pmde)) { swp_entry_t entry; @@ -232,6 +226,13 @@ restart: return not_found(pvmw); return true; } + if (likely(pmd_trans_huge(pmde) || pmd_devmap(pmde))) { + if (pvmw->flags & PVMW_MIGRATION) + return not_found(pvmw); + if (!check_pmd(pmd_pfn(pmde), pvmw)) + return not_found(pvmw); + return true; + } /* THP pmd was split under us: handle on pte level */ spin_unlock(pvmw->ptl); pvmw->ptl = NULL; _ Patches currently in -mm which might be from songmuchun@bytedance.com are mm-hugetlb_vmemmap-introduce-arch_want_hugetlb_page_free_vmemmap.patch arm64-mm-hugetlb-enable-hugetlb_page_free_vmemmap-for-arm64.patch mm-hugetlb_vmemmap-cleanup-hugetlb_vmemmap-related-functions.patch mm-hugetlb_vmemmap-cleanup-hugetlb_free_vmemmap_enabled.patch mm-hugetlb_vmemmap-cleanup-config_hugetlb_page_free_vmemmap.patch mm-rmap-fix-cache-flush-on-thp-pages.patch dax-fix-cache-flush-on-pmd-mapped-pages.patch mm-rmap-introduce-pfn_mkclean_range-to-cleans-ptes.patch mm-pvmw-add-support-for-walking-devmap-pages.patch dax-fix-missing-writeprotect-the-pte-entry.patch mm-simplify-follow_invalidate_pte.patch