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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5B38AC83F21 for ; Tue, 15 Jul 2025 13:23:59 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id CBC788D0003; Tue, 15 Jul 2025 09:23:58 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id C94E68D0001; Tue, 15 Jul 2025 09:23:58 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id BAA8D8D0003; Tue, 15 Jul 2025 09:23:58 -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 AA1798D0001 for ; Tue, 15 Jul 2025 09:23:58 -0400 (EDT) Received: from smtpin21.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 2C7FC1D9F6B for ; Tue, 15 Jul 2025 13:23:58 +0000 (UTC) X-FDA: 83666566956.21.B6898BF Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by imf28.hostedemail.com (Postfix) with ESMTP id 189ABC0009 for ; Tue, 15 Jul 2025 13:23:55 +0000 (UTC) Authentication-Results: imf28.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=M5cq5ieS; spf=pass (imf28.hostedemail.com: domain of dhildenb@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=dhildenb@redhat.com; dmarc=pass (policy=quarantine) header.from=redhat.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1752585836; 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-type: content-transfer-encoding:content-transfer-encoding:in-reply-to: references:dkim-signature; bh=I+njjEeJUfoyHVChoDSaOpmOHc6CwMwYKPYbj7nDuS0=; b=O3bTHd6wDtNoJWtkhMKYHaSPuFr0IZFzTojNSNy9Ei9abZZY03hnQoHps5MQkUS8dfM7tG sGXyRHQ1e+gfCnY8D3fTogOVlkWZ7IHwulhA96/YSMeabdiNKrbZoC60AJYuLtSkLi0stA mREfBROW3VbiQ/PJlCXjLC0rVUgEwiI= ARC-Authentication-Results: i=1; imf28.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=M5cq5ieS; spf=pass (imf28.hostedemail.com: domain of dhildenb@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=dhildenb@redhat.com; dmarc=pass (policy=quarantine) header.from=redhat.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1752585836; a=rsa-sha256; cv=none; b=aq7UYX3J3EdS+Sdc3fX+wQfsfC5jLRY8F6Op59TcjiIdhXzWph2JsL6T74BmKF1tNeA6C3 BGnaWlXfLeENPlOWYbTAWPW2qJ/OK4wJTNixvoTukxl7LjT87UUiee3p3lS8g+RQTpMtcZ lS0Ek1rzXYVLsex+JREI3NmT43JYiRs= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1752585835; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=I+njjEeJUfoyHVChoDSaOpmOHc6CwMwYKPYbj7nDuS0=; b=M5cq5ieS9rO+feWcHJHj9JnVBYteNMjQ5AoUJMO0myQCcEgCEo2RkImDrxad3etoNo3Mkw 56gNSP/CgfaDijdRluJP6h8AEHilziODhcfWbt4+Dr47vJqt0IrkAI9f8ESbv+JlGtHuEy CkjurXOnxOtlVzgBqF0Op30HqXOF7ow= Received: from mail-wm1-f71.google.com (mail-wm1-f71.google.com [209.85.128.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-531-tmLE_eD9ND25IWhuF-plWg-1; Tue, 15 Jul 2025 09:23:54 -0400 X-MC-Unique: tmLE_eD9ND25IWhuF-plWg-1 X-Mimecast-MFC-AGG-ID: tmLE_eD9ND25IWhuF-plWg_1752585833 Received: by mail-wm1-f71.google.com with SMTP id 5b1f17b1804b1-451ac1b43c4so30518885e9.0 for ; Tue, 15 Jul 2025 06:23:53 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1752585833; x=1753190633; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=I+njjEeJUfoyHVChoDSaOpmOHc6CwMwYKPYbj7nDuS0=; b=PHyhr1cDSLIazfqylQLqywvdXcFWJChs4Ifd3eVTZ4QK5CvEUrAluc2sJCPOZcxgXB fBUOWmo2nttGXkfBSj9mg2Yk4rgNL3I8Jgyt9f/BUcW2mZM5PdYhsd0mkbRc3cDXjnC+ ff6K4qQYF41rIr96EDuxvUELnZCUQiKIft7D/coHmw5C3UAZS6N3kAxDssPs3MYZQO33 AsBg5WkZyOd5BENLM/njzMQgFI8z8WIUxIA0GeNbd+mpaFzW146F+wfhYXqehzJRJ42Y MT0ph7fEXv8ZuWElIiF56L9HLdN1zE6/F/noqErQpBdlhAf78OsxwtVP1c089zm6HK2E +BTg== X-Gm-Message-State: AOJu0YxGCsqyngE/mulOjWXT+G7+rmB48i5epuaESPgXcJmJ0nK2FupD 2nUDNd3f399ntiWU4P4aXWF22djM19gcbbRoChqChYHoodj7x8HxJaRE5qHL00iEeKMzlaKvtNo ioY9nSTjeGVkaGMUxVQqO6W3YIqfIbQ4Op3wL9ud6sgoZz/+8kk6g X-Gm-Gg: ASbGnctiWm6q+5JqRXtg5XQRfIH/UX4E6vEV6KUjROh2EjxooCKqWKi5MSyml08ZXWn dOahyNb5kLNP/fTTNVkJV8sf+TuHDYmz6+9h1aUQQB7nYb/JnPHShCghMYJ2tfDhVLZkq1h+wPx 2flrkaBNsCS3Czp/9uz//7BgifJrBXPKpqTXZZn+uF3JJm7UBQZyR5NJCQMPlGE68eZ2j+MN9pT 94yQwfYiDQ9Z6eoNsPKhdqeQEsZL37n5Qgp02D78BicfZEFmI/Ir81vjyGro+jeMHMcDaZ2Zf2E FG9wcgfDi0yXtMAFS3ggLu5n/9imqVHVwjVETvTce4M00KOqOMB6/HabUl1qdaMOgCLRkDpeWa5 8pLKdGevz3HMsZ7sa0dAe/Ak2 X-Received: by 2002:adf:9b97:0:b0:3a5:7944:c9b with SMTP id ffacd0b85a97d-3b5f18808c9mr9743493f8f.16.1752585832741; Tue, 15 Jul 2025 06:23:52 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHEkZDRkA14IcXQD+lQPeKL7StailaRmICkp2BJ1WOb6DFxYeWLDyvLUcHDBHF9Bf7MHtKqWA== X-Received: by 2002:adf:9b97:0:b0:3a5:7944:c9b with SMTP id ffacd0b85a97d-3b5f18808c9mr9743472f8f.16.1752585832205; Tue, 15 Jul 2025 06:23:52 -0700 (PDT) Received: from localhost (p200300d82f2849002c244e201f219fbd.dip0.t-ipconnect.de. [2003:d8:2f28:4900:2c24:4e20:1f21:9fbd]) by smtp.gmail.com with UTF8SMTPSA id ffacd0b85a97d-3b5e8e14e82sm15213383f8f.71.2025.07.15.06.23.50 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 15 Jul 2025 06:23:51 -0700 (PDT) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, xen-devel@lists.xenproject.org, linux-fsdevel@vger.kernel.org, nvdimm@lists.linux.dev, David Hildenbrand , Andrew Morton , Juergen Gross , Stefano Stabellini , Oleksandr Tyshchenko , Dan Williams , Matthew Wilcox , Jan Kara , Alexander Viro , Christian Brauner , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Zi Yan , Baolin Wang , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Jann Horn , Pedro Falcato , Hugh Dickins , Oscar Salvador , Lance Yang Subject: [PATCH v1 0/9] mm: vm_normal_page*() improvements Date: Tue, 15 Jul 2025 15:23:41 +0200 Message-ID: <20250715132350.2448901-1-david@redhat.com> X-Mailer: git-send-email 2.50.1 MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: QNjiiTtCQh_QVpC4EDKRtooXgemARexiF2AMcWh7ee0_1752585833 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true X-Stat-Signature: 6uu9mrrp9bwx1ne9judxe1ma5unnmcxo X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 189ABC0009 X-Rspam-User: X-HE-Tag: 1752585835-309094 X-HE-Meta: U2FsdGVkX19tKac3u7aVeDpY/J8gOXlmOfhijntZL9QhtnDIpLKoWCMpnRHnVualRtfnLbHYsR+qOKAGrCzqzNG04H/lw0yjRKodqWG0QdBSSuqlaMrUG2rsZ5vuN4f/bypZVbFMCHpPTgIJsG51c34wQmVPYndGPansr0XYuCOSZ/bGY3BdEcx52bHq9OafT91t5T1TtKaZ1SAZGMXx91Bz/8FBH/X2LC+Yx4Y0Kf1NNToXbybzoMaKkPRDi+tR8/C+hjcHZ39SRwaIBJO0vyP00BiwzRK7PtVSStWm4TVbhVSMsxDS5ev4INYgl88M44NDlQ8lYr7ixN9vrfYjzyTKXhYYATTpDkBz/gdMe+IJaVK4LmsW+zF9j1PAzs10vR23D2yPJ4yVUEikYFgqxa1cPZpwY2wKU9zqup/1BozNChQCdvJTnGC1kUzKIk3OGUdMTI6q37r24lRHVFWIb1YowQd9h+CE7PidWVj/VgJAv3v/mcubd1EWjtGyun6xoI4vRGGd2ZowrHVoSCnBXrgg4wZD6IP+IInJ+ubK/msk+BzjRwdbukT9gXLPjGiMizFmses9cIQc4EAF009yJYMUsi7Q/+lK3nXcI/NwkVUzGKtrIKVFVkk6ByiFnlUKWAwF3Yq7LRTlUplil4Lgf4APfEYPRDcdYKBW2ynuo3htbk88fGv0DO/21CDKjnc/+DczDzWRUeDhWZD455Iz6zKp402nAJuoeYYLi/5tCVbpPOiGAxViwM1581y2yH6enxURYdktUPEzZ653+V8P2jFVrBYIsU6Dg7zQO2fgZjJ/m0+37FE459H8HHmPqnfVpVzLOa7752xcY3AExkm0i8hB1WMLfcwciv4b3ey+NFcS5HpDsvLzCRnbvu5jq9qQk6CkQKwBjfIHozbBmY7FUxtmBdHCqFatKlJYshT4mzRsnMYsx0VeuwVXnDsVSfasxG7Xy4j4Tq51Yvz+2ly fCYdpnAx 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 Eyqdm+hc U/CI9V1mreLLsz42VSAUUoMYf9vOjQauCYjeI7Fks9g= 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: List-Subscribe: List-Unsubscribe: This is the follow-up of [1]: [PATCH RFC 00/14] mm: vm_normal_page*() + CoW PFNMAP improvements Based on mm/mm-new. I dropped the CoW PFNMAP changes for now, still working on a better way to sort all that out cleanly. Cleanup and unify vm_normal_page_*() handling, also marking the huge zerofolio as special in the PMD. Add+use vm_normal_page_pud() and cleanup that XEN vm_ops->find_special_page thingy. There are plans of using vm_normal_page_*() more widely soon. Briefly tested on UML (making sure vm_normal_page() still works as expected without pte_special() support) and on x86-64 with a bunch of tests. [1] https://lkml.kernel.org/r/20250617154345.2494405-1-david@redhat.com RFC -> v1: * Dropped the highest_memmap_pfn removal stuff and instead added "mm/memory: convert print_bad_pte() to print_bad_page_map()" * Dropped "mm: compare pfns only if the entry is present when inserting pfns/pages" for now, will probably clean that up separately. * Dropped "mm: remove "horrible special case to handle copy-on-write behaviour"", and "mm: drop addr parameter from vm_normal_*_pmd()" will require more thought * "mm/huge_memory: support huge zero folio in vmf_insert_folio_pmd()" -> Extend patch description. * "fs/dax: use vmf_insert_folio_pmd() to insert the huge zero folio" -> Extend patch description. * "mm/huge_memory: mark PMD mappings of the huge zero folio special" -> Remove comment from vm_normal_page_pmd(). * "mm/memory: factor out common code from vm_normal_page_*()" -> Adjust to print_bad_page_map()/highest_memmap_pfn changes. -> Add proper kernel doc to all involved functions * "mm: introduce and use vm_normal_page_pud()" -> Adjust to print_bad_page_map() changes. Cc: Andrew Morton Cc: Juergen Gross Cc: Stefano Stabellini Cc: Oleksandr Tyshchenko Cc: Dan Williams Cc: Matthew Wilcox Cc: Jan Kara Cc: Alexander Viro Cc: Christian Brauner Cc: Lorenzo Stoakes Cc: "Liam R. Howlett" Cc: Vlastimil Babka Cc: Mike Rapoport Cc: Suren Baghdasaryan Cc: Michal Hocko Cc: Zi Yan Cc: Baolin Wang Cc: Nico Pache Cc: Ryan Roberts Cc: Dev Jain Cc: Barry Song Cc: Jann Horn Cc: Pedro Falcato Cc: Hugh Dickins Cc: Oscar Salvador Cc: Lance Yang David Hildenbrand (9): mm/huge_memory: move more common code into insert_pmd() mm/huge_memory: move more common code into insert_pud() mm/huge_memory: support huge zero folio in vmf_insert_folio_pmd() fs/dax: use vmf_insert_folio_pmd() to insert the huge zero folio mm/huge_memory: mark PMD mappings of the huge zero folio special mm/memory: convert print_bad_pte() to print_bad_page_map() mm/memory: factor out common code from vm_normal_page_*() mm: introduce and use vm_normal_page_pud() mm: rename vm_ops->find_special_page() to vm_ops->find_normal_page() drivers/xen/Kconfig | 1 + drivers/xen/gntdev.c | 5 +- fs/dax.c | 47 +---- include/linux/mm.h | 20 +- mm/Kconfig | 2 + mm/huge_memory.c | 119 ++++------- mm/memory.c | 346 ++++++++++++++++++++++--------- mm/pagewalk.c | 20 +- tools/testing/vma/vma_internal.h | 18 +- 9 files changed, 343 insertions(+), 235 deletions(-) base-commit: 64d19a2cdb7b62bcea83d9309d83e06d7aff4722 -- 2.50.1