From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5E18B2E1758 for ; Tue, 15 Jul 2025 13:23:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752585838; cv=none; b=TfO8k0gfmdMjAWgwjEY5MS+7k7WgEnt008jdiEde+9zYT/x7wFrFNaEAEm+VIwCqmwPDnCaUrlS3rSlC64h9jWmZpYKl9Rwt6HwqUaZ15864qb6WetYK2/JG+J86WmUB6tmxV+isPdJLo0VNp7ChG8lGN/Z7B9LWH+UKB1aOrhc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752585838; c=relaxed/simple; bh=kXdFNneQJlViZW8aFNu2Wo0nKhuTK82N9UJKOX0x5tc=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:content-type; b=LkB6RJJsn5gqnoCMT3BJTSHgeXPjhtwXkgYQYSwxFvNMkUJ2uOhobXq1eYZuXj2JtYE8Z5fZ+GBuJfEotjecrFBV4DArpqJBxhTHWNypie09TV2ygt9wcRC8UgqihYlwpMTWpaGc0fIC94YWi9DhJ5DbYWqMtF20oPG6z2N8InE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=M5cq5ieS; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="M5cq5ieS" 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-692-W6h_VBhxOeGf3CkjXDdHJg-1; Tue, 15 Jul 2025 09:23:54 -0400 X-MC-Unique: W6h_VBhxOeGf3CkjXDdHJg-1 X-Mimecast-MFC-AGG-ID: W6h_VBhxOeGf3CkjXDdHJg_1752585833 Received: by mail-wm1-f71.google.com with SMTP id 5b1f17b1804b1-451d7de4ae3so35045335e9.2 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=EIFpqxCaxw0LlqzOH9Rqj1rqmeJtbd95zw/xN/Z8isFiw1ikNffZ58xfyL+MJtj6Ol U44dwuwmYFzigawJEVoKUmXD+wvHtovS4pTRuGFaCwgTRWznc4/SnNYU6UBDUgO1W1lR JSCwdjjtnQ724chsFwgT0OwsRE+HgEE12edxxnOmk0ZUAySk3I6uD4/Fb6RJZpiO98pd OW4VrxjuUmcXcHQV97FXKPBd0YR9/bfQoKEdP82RtLwvLL9veXF3gkTJUgzuyqQp3nWX QoKL+SoPoqRTALI38Y2Oo5jJpLW6hZaTiCrodzdlE+XLdg3Qk2n1JWI9zsN4LK5vJ4yw Ck0w== X-Forwarded-Encrypted: i=1; AJvYcCUoZOdx3bmalCrXeEA8uZJDqIRACr6S+Dz+PFkG+lEXIwE/Wy/EtKOVq2ULiEmIq5CN7i0yolQ=@lists.linux.dev X-Gm-Message-State: AOJu0YzhC1VU5yq4Fx4IV4EXBaGGwumFgfPqbu2ykeWDveWfv2KIgYF6 ql9eG6hi1uZ4Skck1SLLGS/+0n7zRkTpKC5l56WXysudRuJ/2JNf77lQnHNWxvhsvn6XtTHM+BB 1BsMv4QQREHYrGU4xa+7WgQDOpuo9lGsgx5YjXmGnqPIYzAdZGzKcUu8dlRdtqw0HYQYW X-Gm-Gg: ASbGncvW1yMmTIUalL0y4p7ZQCRftaYERl2BOGYU7VeqPrCFGzSorv59cQM2g6ijLLF Ii0kzrIE0YulDjypkNCAXtKkYQVBX8Awrkv493W8I2gfN0KWukgUqlmyRad0tbWxFYQugXa/UFA VLoiCIq4lGkpdoJHSFzQPftvpsboV280eb5JzdnGONvLYxMMxAw+AnEyYBq/CTbXqrVr30TxuKY 6FQwK+govLnWRjaT0bG11ols4MrpU3D2ugzZsgYMiyuwVYfbPWBm+K3X4khWyy+2Nclf4sAhLn2 m2iJ1hZ5dT0jOygpn623ZBiA9bO+1PzIvO7Rhz/Gx6M1XRq7afmDbkTGlaWVA67nEhdZw3kyoCM tk+Fpa9BJaETVuOGQkwGjzXZu X-Received: by 2002:adf:9b97:0:b0:3a5:7944:c9b with SMTP id ffacd0b85a97d-3b5f18808c9mr9743505f8f.16.1752585832756; 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 Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: AQocYBhC8RwLZ6M9Q0hiezkKuoo0x1Nj26TPxcBFnY8_1752585833 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true 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