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 4CD00C87FCA for ; Fri, 1 Aug 2025 14:23:46 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E785B8E0002; Fri, 1 Aug 2025 10:23:45 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id E4FD48E0001; Fri, 1 Aug 2025 10:23:45 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D660F8E0002; Fri, 1 Aug 2025 10:23:45 -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 C8D338E0001 for ; Fri, 1 Aug 2025 10:23:45 -0400 (EDT) Received: from smtpin16.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 710E0140234 for ; Fri, 1 Aug 2025 14:23:45 +0000 (UTC) X-FDA: 83728407210.16.A4E7F6E Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by imf06.hostedemail.com (Postfix) with ESMTP id E565218000B for ; Fri, 1 Aug 2025 14:23:42 +0000 (UTC) Authentication-Results: imf06.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=RSFnGPwq; spf=pass (imf06.hostedemail.com: domain of david@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=david@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=1754058223; 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:in-reply-to:references:references:dkim-signature; bh=h7mKFgNhjQHVPpLADK17HpuzYY9CFufwiy/n3xns4nY=; b=LZLeupEDAbNYgYEqDdjLax3xOHRyFjvhv/GKIJ035h/4vSk7KMGISZ96ZYowCLLL4ZTDOG sr4OlRlXpz3dJstHkRMHkMtnUrRaMWdeIswqXFmw8a4lmHYom6g3Vk93RoLCSNGyIBo6Am CBZaKOU8o7qY8Ec6LMM5TNId5tXIeI4= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1754058223; a=rsa-sha256; cv=none; b=lkOuxFruGQIyUZBcdWr/jezZl/JRpsUQ7jAGEHkBgzCFVnvEUb/lR78Zj+jQIgz22YJLCQ wQITYmqh8RxPTVRlYTFW2Azv1GKuWSWRhDXW0xkN4dnGpsqFwzN5PcLcPCM6B2UACX6QMn LDlH6ZKxBQxKlxTlAs67B17FelrIItM= ARC-Authentication-Results: i=1; imf06.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=RSFnGPwq; spf=pass (imf06.hostedemail.com: domain of david@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=david@redhat.com; dmarc=pass (policy=quarantine) header.from=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1754058222; 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: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=h7mKFgNhjQHVPpLADK17HpuzYY9CFufwiy/n3xns4nY=; b=RSFnGPwqOv5TU/VthZrjLYQ1dvB1kY7r6lJX278CO79xCq+ZPfb9XXJjAYtjcieaIvbXKi KahccNJK2d+Cpe0pP5A+wtWNmioapOSiOxzELrniKiNAtgKPP79+sy/HhzfMcSmBzqANyv BxRrTIpO+lhxqgfxOoLVFXzgJugFm2U= Received: from mail-wr1-f70.google.com (mail-wr1-f70.google.com [209.85.221.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-479-LR5NqvBnPIatEt8ebgAF3A-1; Fri, 01 Aug 2025 10:23:35 -0400 X-MC-Unique: LR5NqvBnPIatEt8ebgAF3A-1 X-Mimecast-MFC-AGG-ID: LR5NqvBnPIatEt8ebgAF3A_1754058214 Received: by mail-wr1-f70.google.com with SMTP id ffacd0b85a97d-3b7889c8d2bso748481f8f.3 for ; Fri, 01 Aug 2025 07:23:35 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1754058214; x=1754663014; h=content-transfer-encoding:in-reply-to:organization:autocrypt :content-language:from:references:cc:to:subject:user-agent :mime-version:date:message-id:x-gm-message-state:from:to:cc:subject :date:message-id:reply-to; bh=h7mKFgNhjQHVPpLADK17HpuzYY9CFufwiy/n3xns4nY=; b=wPec9I2jPxeQ34BBF28q1Ag5YOqIJvG5BydtQodM7q0NyCdbsFiOBF6zuOfEpiFkrY 5i31CZqqbZXS0JvqeG+T2TvP5x3T7H5u6hgmut2ytuZiXhKbmDL78U2e1sSIxvaz4uBo nlyvwXXkZbDCasVVLNS7BOp8edTte9A+660qOpOxWLnhAKGum9VafyP9fB2pS1oJwHxG 9Uigd40+ZwFEoWFNgxacekZ3LFJJU3zpXm+mtL3m6MjJBZVRP6zUy2iRa4nxI63iIz3Y 31/NRO80yjL/YtmyC0V18lWWhi378POEdUwiUm/TNl2k6EZYKX0dMjvZU8Meg/Fc806W JAgA== X-Forwarded-Encrypted: i=1; AJvYcCVGrV5hwjuzvBM3iX6KIzmaR1z8l1KPQlNWlzmaRf+RPSdmdu4iU82nQ4Wt3Ts7GSP3Vp1wLGeZWg==@kvack.org X-Gm-Message-State: AOJu0YzmtEBl2YMxg2NYCT9GWfFhTbIJmFs4bXPnYrlHQQOcvca7M7Sj Nbx8IekI9YIr/PQZMWwrIwBFcnypGKnEPnuVO8jzbhI5EPMVxBZB22me18YA93YyQj2Q7ZkBtIV tXluUSUvoSeKQkLz2TDjUpz/kmHz670Yp8veyqxeuv5s8ani5xDGf X-Gm-Gg: ASbGnct8xtwGI3euLLGafsteEbJMcf6xYbUHAnRcu6EpDgxV2Oy7C40LYUYN5xMc1kK Ippl7FLzo19OynuvafqLMpxfxprjnANNMczoToh+G6RhcjZz5kKbcKnXDuyXB5cju/GnDVQjIkZ W7Eu2T9qscnbll6yf3NBZOnqLntVb/mGY7pFlY9uxWOauDLrUgwqAI3H4bNdeDu5dL2lLXRQNUQ SV0Ea9c/oe4O+melq4oG0HzXBKhUYH38aNt0KaLyOwvU7pQoRyOBQG9Lw2XeOAn0x955TRIWQIH RooERcHakVmmKZSFK53ey7wnunBxREbazmWGcB1ieiCW+JCSKcM2TM7EAVFOCg18hdFLVlX+tN9 lz3iF4MrkZQUf5gJN+j6/mGnseG5LP7/ld7ti7PEIZjaEnkt52RTZ+fFHmolkycOn X-Received: by 2002:a05:6000:2906:b0:3b7:8984:5134 with SMTP id ffacd0b85a97d-3b8d34458bamr2706368f8f.16.1754058214240; Fri, 01 Aug 2025 07:23:34 -0700 (PDT) X-Google-Smtp-Source: AGHT+IF9ov4+m3bhMWt6XWUmjAi1j/30ofm7xshGyBWCHDYs1YtYTD1WrZVVUYTZQL6gcOxOSI1+uQ== X-Received: by 2002:a05:6000:2906:b0:3b7:8984:5134 with SMTP id ffacd0b85a97d-3b8d34458bamr2706284f8f.16.1754058212333; Fri, 01 Aug 2025 07:23:32 -0700 (PDT) Received: from ?IPV6:2003:d8:2f20:7500:5f99:9633:990e:138? (p200300d82f2075005f999633990e0138.dip0.t-ipconnect.de. [2003:d8:2f20:7500:5f99:9633:990e:138]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-458af8c5a87sm13192285e9.2.2025.08.01.07.23.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 01 Aug 2025 07:23:31 -0700 (PDT) Message-ID: <85a22428-24b5-4a85-9d75-bd2f742ab471@redhat.com> Date: Fri, 1 Aug 2025 16:23:30 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 00/10] convert the majority of file systems to mmap_prepare To: Lorenzo Stoakes , Jason Gunthorpe Cc: Andrew Morton , "Liam R . Howlett" , Jens Axboe , Christian Brauner , Jan Kara , Amir Goldstein , Kees Cook , Josef Bacik , Matthew Wilcox , Vlastimil Babka , Jann Horn , Pedro Falcato , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org References: <20250801140057.GA245321@nvidia.com> <3cf76128-390a-4ef2-85a7-e3ee21ba04b5@lucifer.local> From: David Hildenbrand Autocrypt: addr=david@redhat.com; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZgEEwEIAEICGwMGCwkIBwMCBhUIAgkKCwQW AgMBAh4BAheAAhkBFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAmgsLPQFCRvGjuMACgkQTd4Q 9wD/g1o0bxAAqYC7gTyGj5rZwvy1VesF6YoQncH0yI79lvXUYOX+Nngko4v4dTlOQvrd/vhb 02e9FtpA1CxgwdgIPFKIuXvdSyXAp0xXuIuRPQYbgNriQFkaBlHe9mSf8O09J3SCVa/5ezKM OLW/OONSV/Fr2VI1wxAYj3/Rb+U6rpzqIQ3Uh/5Rjmla6pTl7Z9/o1zKlVOX1SxVGSrlXhqt kwdbjdj/csSzoAbUF/duDuhyEl11/xStm/lBMzVuf3ZhV5SSgLAflLBo4l6mR5RolpPv5wad GpYS/hm7HsmEA0PBAPNb5DvZQ7vNaX23FlgylSXyv72UVsObHsu6pT4sfoxvJ5nJxvzGi69U s1uryvlAfS6E+D5ULrV35taTwSpcBAh0/RqRbV0mTc57vvAoXofBDcs3Z30IReFS34QSpjvl Hxbe7itHGuuhEVM1qmq2U72ezOQ7MzADbwCtn+yGeISQqeFn9QMAZVAkXsc9Wp0SW/WQKb76 FkSRalBZcc2vXM0VqhFVzTb6iNqYXqVKyuPKwhBunhTt6XnIfhpRgqveCPNIasSX05VQR6/a OBHZX3seTikp7A1z9iZIsdtJxB88dGkpeMj6qJ5RLzUsPUVPodEcz1B5aTEbYK6428H8MeLq NFPwmknOlDzQNC6RND8Ez7YEhzqvw7263MojcmmPcLelYbfOwU0EVcufkQEQAOfX3n0g0fZz Bgm/S2zF/kxQKCEKP8ID+Vz8sy2GpDvveBq4H2Y34XWsT1zLJdvqPI4af4ZSMxuerWjXbVWb T6d4odQIG0fKx4F8NccDqbgHeZRNajXeeJ3R7gAzvWvQNLz4piHrO/B4tf8svmRBL0ZB5P5A 2uhdwLU3NZuK22zpNn4is87BPWF8HhY0L5fafgDMOqnf4guJVJPYNPhUFzXUbPqOKOkL8ojk CXxkOFHAbjstSK5Ca3fKquY3rdX3DNo+EL7FvAiw1mUtS+5GeYE+RMnDCsVFm/C7kY8c2d0G NWkB9pJM5+mnIoFNxy7YBcldYATVeOHoY4LyaUWNnAvFYWp08dHWfZo9WCiJMuTfgtH9tc75 7QanMVdPt6fDK8UUXIBLQ2TWr/sQKE9xtFuEmoQGlE1l6bGaDnnMLcYu+Asp3kDT0w4zYGsx 5r6XQVRH4+5N6eHZiaeYtFOujp5n+pjBaQK7wUUjDilPQ5QMzIuCL4YjVoylWiBNknvQWBXS lQCWmavOT9sttGQXdPCC5ynI+1ymZC1ORZKANLnRAb0NH/UCzcsstw2TAkFnMEbo9Zu9w7Kv AxBQXWeXhJI9XQssfrf4Gusdqx8nPEpfOqCtbbwJMATbHyqLt7/oz/5deGuwxgb65pWIzufa N7eop7uh+6bezi+rugUI+w6DABEBAAHCwXwEGAEIACYCGwwWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCaCwtJQUJG8aPFAAKCRBN3hD3AP+DWlDnD/4k2TW+HyOOOePVm23F5HOhNNd7nNv3 Vq2cLcW1DteHUdxMO0X+zqrKDHI5hgnE/E2QH9jyV8mB8l/ndElobciaJcbl1cM43vVzPIWn 01vW62oxUNtEvzLLxGLPTrnMxWdZgxr7ACCWKUnMGE2E8eca0cT2pnIJoQRz242xqe/nYxBB /BAK+dsxHIfcQzl88G83oaO7vb7s/cWMYRKOg+WIgp0MJ8DO2IU5JmUtyJB+V3YzzM4cMic3 bNn8nHjTWw/9+QQ5vg3TXHZ5XMu9mtfw2La3bHJ6AybL0DvEkdGxk6YHqJVEukciLMWDWqQQ RtbBhqcprgUxipNvdn9KwNpGciM+hNtM9kf9gt0fjv79l/FiSw6KbCPX9b636GzgNy0Ev2UV m00EtcpRXXMlEpbP4V947ufWVK2Mz7RFUfU4+ETDd1scMQDHzrXItryHLZWhopPI4Z+ps0rB CQHfSpl+wG4XbJJu1D8/Ww3FsO42TMFrNr2/cmqwuUZ0a0uxrpkNYrsGjkEu7a+9MheyTzcm vyU2knz5/stkTN2LKz5REqOe24oRnypjpAfaoxRYXs+F8wml519InWlwCra49IUSxD1hXPxO WBe5lqcozu9LpNDH/brVSzHCSb7vjNGvvSVESDuoiHK8gNlf0v+epy5WYd7CGAgODPvDShGN g3eXuA== Organization: Red Hat In-Reply-To: <3cf76128-390a-4ef2-85a7-e3ee21ba04b5@lucifer.local> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: WorkM4Cs5OysMaBHbqqQUn-00fhMXqW1N9om1hqxOyc_1754058214 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: E565218000B X-Rspam-User: X-Rspamd-Server: rspam09 X-Stat-Signature: ut6ico8k4agweh7ofucpfwf5sn8iz1w8 X-HE-Tag: 1754058222-626311 X-HE-Meta: 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 btZxQTf4 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 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: >> >> I would like to suggest we add a vma->prepopulate() callback which is >> where the remap_pfn should go. Once the VMA is finalized and fully >> operational the vma_ops have the opportunity to prepopulate any PTEs. > > I assume you mean vma->vm_ops->prepopulate ? > > We also have to think about other places where we prepopulate also, for > instance the perf mmap call now prepopulates (ahem that was me). > > So I do like this as a generalisation. Sounds interesting to me. -- Cheers, David / dhildenb