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 36748D6DDE1 for ; Fri, 15 Nov 2024 13:35:33 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id C58506B009B; Fri, 15 Nov 2024 08:35:32 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id C072B6B009C; Fri, 15 Nov 2024 08:35:32 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id ACE706B00A0; Fri, 15 Nov 2024 08:35:32 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 909676B009B for ; Fri, 15 Nov 2024 08:35:32 -0500 (EST) Received: from smtpin12.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 42A798146A for ; Fri, 15 Nov 2024 13:35:32 +0000 (UTC) X-FDA: 82788425202.12.13B6F64 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by imf13.hostedemail.com (Postfix) with ESMTP id 0860820025 for ; Fri, 15 Nov 2024 13:34:42 +0000 (UTC) Authentication-Results: imf13.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=UbAYQyAe; spf=pass (imf13.hostedemail.com: domain of david@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=david@redhat.com; dmarc=pass (policy=none) header.from=redhat.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1731677533; 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=BRPBbWpO8dlCNiPICJdzK2CCwCR8uej8lTMNly+xDjA=; b=MtPBqG+wpGN0xmsOhPnEbITCmlKWp/23V/O03SduFqpIEJFiqED8J5Yl7rdtrueA30NKCi JiEaLxH3KI+bGh3nK4z2PqxSJgK3fovVksCP/LilVkzW+f4ay13o2Y3SEg8FeamigJkhuU mc5GPnfH1tLnEH+GtsiHUR9POvOW/uk= ARC-Authentication-Results: i=1; imf13.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=UbAYQyAe; spf=pass (imf13.hostedemail.com: domain of david@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=david@redhat.com; dmarc=pass (policy=none) header.from=redhat.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1731677533; a=rsa-sha256; cv=none; b=H7yC/Ru38oNQLOIXQJWNhojADHfamuBQqAANR0sCFh5IqDhGz4RItkM1QNrNKlo+Z+zniP R+ejGrmPsD1fBm0+I4VP1WkKtcbm4FWv5dNAXplIRVXHiyb1ur0NMPSxrgGfxYB9Y184Zi i2XKC0SiWLtdPL89AQFGxrksHwACA/k= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1731677729; 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=BRPBbWpO8dlCNiPICJdzK2CCwCR8uej8lTMNly+xDjA=; b=UbAYQyAeNEy2u5b5fw8SENTymkX85jmH2I3ncN6sqQFCAD68FLUMHfobPV9xFSin8YPgJY LRA0hCzbBRewWPfNXaFkG0Hp//6KlrcPLV0FfNnzsFeReaePkHEIizAVr+8GJZRRMI42vP t4KIZ8gRFmyiAFqlFftWN9Z8euGijgs= Received: from mail-wr1-f69.google.com (mail-wr1-f69.google.com [209.85.221.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-456-WvMe91ImNhyJag-4MYyIxg-1; Fri, 15 Nov 2024 08:35:27 -0500 X-MC-Unique: WvMe91ImNhyJag-4MYyIxg-1 X-Mimecast-MFC-AGG-ID: WvMe91ImNhyJag-4MYyIxg Received: by mail-wr1-f69.google.com with SMTP id ffacd0b85a97d-38218576e86so1006403f8f.0 for ; Fri, 15 Nov 2024 05:35:27 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1731677726; x=1732282526; 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=BRPBbWpO8dlCNiPICJdzK2CCwCR8uej8lTMNly+xDjA=; b=MP51jtZmNiVwCKLV0shaO1rtYRpF3dwVhaxrC9xRBdUNwxeNeuKnVE/VL+eNLxchZU xZtYEdFdTVSKYreVNt5L5O2ENeIqVzzz9ZY8wzCHn6rjexl1lf1zzFvAt8GtbD9Ej0n4 whM2hnKcPpIzAWH8x+xeXwvUC80uRbC+vi8RdAG8AVOG918RgE0DkmHyb9mkcXVd6yLT F07Hu89GP7dYkUd0erjwSn/bsrjxY3Mq+67XDEq2FLeFu7jjYDKVaZxSKZkq7jWTvLVn VfADujaSEbiAJcFPcFRUnFJjnKFYELtmbmpPhY4ptKhi4aRWYiR/4/iVyMTy57efdNt1 I0kw== X-Forwarded-Encrypted: i=1; AJvYcCVDyiaekwLL1wcNpb9h0mX2zfhcGF+JfmVC23zNZeyJtwTu/lSdjX6eQMfpDoIrQJZ1BC7KmwpEEQ==@kvack.org X-Gm-Message-State: AOJu0YyVmAanUBLgBrpkoR9p8gWRqM5vmsnKpsiblXF3JxLHVg16heh4 NhnpEBq7+e9yEiKXlzwVRSOGaGLo+yAnlgvrf+Rv7gxHoesfVQia/onOg40StXEgFQ52WnsZtXJ /a15FmHf4sbqvHytnfP3F+UmauYfG87DuUGvowsqtzBy8V5t9 X-Received: by 2002:a05:6000:400d:b0:381:f0d0:ed2c with SMTP id ffacd0b85a97d-382140786c2mr5746927f8f.29.1731677726600; Fri, 15 Nov 2024 05:35:26 -0800 (PST) X-Google-Smtp-Source: AGHT+IHVwfRMJ56OG7UUIxELoMcxyNnzIOKP53b/nqW9MISzIPUMs82k5Pfj9CvdXyJ+Umu/B5tU3w== X-Received: by 2002:a05:6000:400d:b0:381:f0d0:ed2c with SMTP id ffacd0b85a97d-382140786c2mr5746897f8f.29.1731677726158; Fri, 15 Nov 2024 05:35:26 -0800 (PST) Received: from ?IPV6:2003:cb:c721:8100:177e:1983:5478:64ec? (p200300cbc7218100177e1983547864ec.dip0.t-ipconnect.de. [2003:cb:c721:8100:177e:1983:5478:64ec]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3821adbbca7sm4470804f8f.47.2024.11.15.05.35.24 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 15 Nov 2024 05:35:25 -0800 (PST) Message-ID: <3269e0a6-29a4-478b-842a-629efc8d5d59@redhat.com> Date: Fri, 15 Nov 2024 14:35:24 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 0/5] Support large folios for tmpfs To: Daniel Gomez , Baolin Wang , akpm@linux-foundation.org, hughd@google.com Cc: willy@infradead.org, wangkefeng.wang@huawei.com, 21cnbao@gmail.com, ryan.roberts@arm.com, ioworker0@gmail.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org References: 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/g1oFAl8Ox4kFCRKpKXgACgkQTd4Q 9wD/g1oHcA//a6Tj7SBNjFNM1iNhWUo1lxAja0lpSodSnB2g4FCZ4R61SBR4l/psBL73xktp rDHrx4aSpwkRP6Epu6mLvhlfjmkRG4OynJ5HG1gfv7RJJfnUdUM1z5kdS8JBrOhMJS2c/gPf wv1TGRq2XdMPnfY2o0CxRqpcLkx4vBODvJGl2mQyJF/gPepdDfcT8/PY9BJ7FL6Hrq1gnAo4 3Iv9qV0JiT2wmZciNyYQhmA1V6dyTRiQ4YAc31zOo2IM+xisPzeSHgw3ONY/XhYvfZ9r7W1l pNQdc2G+o4Di9NPFHQQhDw3YTRR1opJaTlRDzxYxzU6ZnUUBghxt9cwUWTpfCktkMZiPSDGd KgQBjnweV2jw9UOTxjb4LXqDjmSNkjDdQUOU69jGMUXgihvo4zhYcMX8F5gWdRtMR7DzW/YE BgVcyxNkMIXoY1aYj6npHYiNQesQlqjU6azjbH70/SXKM5tNRplgW8TNprMDuntdvV9wNkFs 9TyM02V5aWxFfI42+aivc4KEw69SE9KXwC7FSf5wXzuTot97N9Phj/Z3+jx443jo2NR34XgF 89cct7wJMjOF7bBefo0fPPZQuIma0Zym71cP61OP/i11ahNye6HGKfxGCOcs5wW9kRQEk8P9 M/k2wt3mt/fCQnuP/mWutNPt95w9wSsUyATLmtNrwccz63XOwU0EVcufkQEQAOfX3n0g0fZz 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+DWgUCXw7HsgUJEqkpoQAKCRBN3hD3AP+DWrrpD/4qS3dyVRxDcDHIlmguXjC1Q5tZTwNB boaBTPHSy/Nksu0eY7x6HfQJ3xajVH32Ms6t1trDQmPx2iP5+7iDsb7OKAb5eOS8h+BEBDeq 3ecsQDv0fFJOA9ag5O3LLNk+3x3q7e0uo06XMaY7UHS341ozXUUI7wC7iKfoUTv03iO9El5f XpNMx/YrIMduZ2+nd9Di7o5+KIwlb2mAB9sTNHdMrXesX8eBL6T9b+MZJk+mZuPxKNVfEQMQ a5SxUEADIPQTPNvBewdeI80yeOCrN+Zzwy/Mrx9EPeu59Y5vSJOx/z6OUImD/GhX7Xvkt3kq Er5KTrJz3++B6SH9pum9PuoE/k+nntJkNMmQpR4MCBaV/J9gIOPGodDKnjdng+mXliF3Ptu6 3oxc2RCyGzTlxyMwuc2U5Q7KtUNTdDe8T0uE+9b8BLMVQDDfJjqY0VVqSUwImzTDLX9S4g/8 kC4HRcclk8hpyhY2jKGluZO0awwTIMgVEzmTyBphDg/Gx7dZU1Xf8HFuE+UZ5UDHDTnwgv7E th6RC9+WrhDNspZ9fJjKWRbveQgUFCpe1sa77LAw+XFrKmBHXp9ZVIe90RMe2tRL06BGiRZr jPrnvUsUUsjRoRNJjKKA/REq+sAnhkNPPZ/NNMjaZ5b8Tovi8C0tmxiCHaQYqj7G2rgnT0kt WNyWQQ== Organization: Red Hat In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: A8R-P7BScnM7OHDx68HvER7yqjc-3wNpDCRoHC-SnQs_1731677727 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 0860820025 X-Stat-Signature: 43qisg8ywof78oh4c4ybmpzmkkanym1j X-Rspam-User: X-HE-Tag: 1731677682-447927 X-HE-Meta: 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 AiB4GYyY dz09ZPSVLmgO3GIlculRMvtl9HBICzh6+7BWljctRudhcNrdh1PI00TCEMJ8adt3IV26MgFrqzJ/RzoF5UptisFntHSdF24nGWwoKEbEshy21V0awN8EgusIVqWp2PrV0KRbBlueRZ0TAaGj2gUuysj2hY8O3uesJuhT1KQain3HehdOZBEMZECFPon2muBi3QwnJqVLIOxqCC6/SPEAqceYLXkMRl8QKDntG2E8VOuUEmW44zePOJTz0Qo7BKVILYL/qdVrzzeY+cC7XVTLA8h5Vpon2R62lRyCtymrtdwRQfA1gDyPcWqAEBtKHFqyI/kLBa6au0LrulAnocwvdLK+VLZWmYTcQISTX7eEkdktaFa5R7PvHPqgo+MaOWcwAscyyZqVNgxzKZdXX2NknMUopBP5pmZoa4+4h2dbGxMsTNoed1++ePxCOS3iT5MKdw82G 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: On 15.11.24 14:16, Daniel Gomez wrote: > On Tue Nov 12, 2024 at 8:45 AM CET, Baolin Wang wrote: >> Traditionally, tmpfs only supported PMD-sized huge folios. However nowadays > > Nitpick: > We are mixing here folios/page, PMD-size huge. For anyone not aware of > Memory Folios conversion in the kernel I think this makes it confusing. > Tmpfs has never supported folios so, this is not true. Can we rephrase > it? We had the exact same discussion when we added mTHP support to anonymous memory. I suggest you read: https://lkml.kernel.org/r/65dbdf2a-9281-a3c3-b7e3-a79c5b60b357@redhat.com Folios are an implementation detail on how we manage metadata. Nobody in user space should even have to be aware of how we manage metadata for larger chunks of memory ("huge pages") in the kernel. -- Cheers, David / dhildenb