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 D2BE6C433F5 for ; Mon, 28 Mar 2022 22:39:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230088AbiC1WlM (ORCPT ); Mon, 28 Mar 2022 18:41:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37182 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230108AbiC1WlK (ORCPT ); Mon, 28 Mar 2022 18:41:10 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BE1764A922 for ; Mon, 28 Mar 2022 15:39:27 -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 81349B8128D for ; Mon, 28 Mar 2022 22:39:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 39C41C340EC; Mon, 28 Mar 2022 22:39:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1648507165; bh=lefWoCC7afrny2wV5Cc/vQrsP75NknQuhFRLUFTDZWk=; h=Date:To:From:Subject:From; b=BuuAzSA1YyAFwD5U3/HNQPY1PKvypbKig9MPAKEr550vVbUVnNr42HI4rMgMqKXe0 R8yG7wTuMnx580BqEIbN+Oz9qMXwzIr6OkigEy7bt+oaGMFT5AUHltcaMoqDWkXndc /+0m7FhmNVv8Sg6VZv0snGruT2aAoGm8sUSe1RwE= Date: Mon, 28 Mar 2022 15:39:24 -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: <20220328223925.39C41C340EC@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/20220318074529.5261-5-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 | 16 ++++++++-------- 1 file changed, 8 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 +210,9 @@ restart: */ pmde = READ_ONCE(*pvmw->pmd); - if (pmd_trans_huge(pmde) || is_pmd_migration_entry(pmde)) { + if (pmd_leaf(pmde) || is_pmd_migration_entry(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 +225,13 @@ 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-kfence-fix-objcgs-vector-allocation.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