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 A59BAD68BC6 for ; Fri, 15 Nov 2024 15:44:37 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 3481F6B00B6; Fri, 15 Nov 2024 10:44:37 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 2F73E6B00B7; Fri, 15 Nov 2024 10:44:37 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 123156B00B8; Fri, 15 Nov 2024 10:44:37 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id E4BDE6B00B6 for ; Fri, 15 Nov 2024 10:44:36 -0500 (EST) Received: from smtpin10.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id 87E3B1219E0 for ; Fri, 15 Nov 2024 15:44:36 +0000 (UTC) X-FDA: 82788750324.10.D9C3290 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by imf20.hostedemail.com (Postfix) with ESMTP id 5945B1C001E for ; Fri, 15 Nov 2024 15:43:37 +0000 (UTC) Authentication-Results: imf20.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=h3zkzqqW; spf=pass (imf20.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=1731685277; 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=paUdXD1BpR6sZOqYQvfJv0RARkZ9Ys1bkkJEF+QBuO8=; b=8VUhJvUAHiGFm5EQ8Vor9YZF3rjoQSu5ILE2aS3bP47+bwtbb57phrTH92UqJxrFzsfsPK uboMF0yQIveJcq+O6psSRz3H8Z4tANF2TbbK08wNG+7oIIHT+Ry1QMV107kUIEm6ZzZVa4 9fvNfq1o9M36eP/Xe/xA8+XjqrTSiXg= ARC-Authentication-Results: i=1; imf20.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=h3zkzqqW; spf=pass (imf20.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=1731685277; a=rsa-sha256; cv=none; b=TmG7GDVd+Ts48uiS15iMbkc8tB0piGoc9SJbxskzDLUwUduCL/2aXANqTvi3Z9mruYA25c 2Bm6x9SI9x3X/AKHFt5CdU3zqoLWh319fiePjqx8ikR5c16u+ud+dv1/y0ziRXSgIhhDMX fA+U8h7YpKPfB7AsqZcMKr0RmCdR8qM= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1731685473; 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=paUdXD1BpR6sZOqYQvfJv0RARkZ9Ys1bkkJEF+QBuO8=; b=h3zkzqqWGFOhHpcBWiAJxGxO7AwJBpbkbzA7pqGMlpCtPAlXy7vAyM0h+/2QfDLMhs7XbK zvlYwRdbxvVgaNVDXM/QhGLRXUe5YQuFO+bV7tD3WlKrKmv/wDBfvncZEzamA7ha6CR5WV qdtdLk9xElhR7dQJuR2jOIsi9kyqLvU= Received: from mail-wr1-f72.google.com (mail-wr1-f72.google.com [209.85.221.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-518-r2owL1P6MDS1hy04W8MFJA-1; Fri, 15 Nov 2024 10:44:32 -0500 X-MC-Unique: r2owL1P6MDS1hy04W8MFJA-1 X-Mimecast-MFC-AGG-ID: r2owL1P6MDS1hy04W8MFJA Received: by mail-wr1-f72.google.com with SMTP id ffacd0b85a97d-37d56061a4cso1077572f8f.2 for ; Fri, 15 Nov 2024 07:44:32 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1731685471; x=1732290271; h=content-transfer-encoding:in-reply-to:organization:autocrypt:from :content-language: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=paUdXD1BpR6sZOqYQvfJv0RARkZ9Ys1bkkJEF+QBuO8=; b=gz5UgXbazLTK/yHujB37ThP7VXeuY4p56cGj+zs6RKBnWxHKdtZDNdIYbc4kAWJJLr M0BQeZh/aaYupBViVG79t9ruNF6v3tq4CkR7sJUJKcFBKtG4T/uQX+wZxhMwidbYxMEk BKU/If09fLES5sy3xVBTsfAz/t+7oSJ97Ud7D4f5+1B4EFK5XXRMwMtUeMAJY2XIfOkw aU2rE62jtBaihejm5NW/kDYJeccUaxeKi99v9bN6aMjSo9gif6IogSEu7jZfWwJiypJa pg6Uu9nRw8Py9Bv0Fgfo8rwrULTnOwOwJThJhQZZVyOH4S8SMpNmyaQsI2cFe9eYrV05 ufqA== X-Forwarded-Encrypted: i=1; AJvYcCVBF2SAHsVqMXKfELJrGlZWO0HpPAUAJEWBm7UnRQJlNiSoEOaweOJPEmJW3+rK924XoXjI5dEKCA==@kvack.org X-Gm-Message-State: AOJu0YyuQZIeOdAH2Jz2QzO2w6zVWIv62DGbJV6Wmmyu/454TnKpoGeg Sh0bnxq351zJ6o4Y5ujkexNs6yfUHxdBylVW8rBowu+toy8b8fiNB0O1Eer8+PNsnGdTffSlCdz AedRe6mylsFHBTB12oW9XCeIRgziPg31IQjdHhtcrIOdYNzBW X-Received: by 2002:a05:6000:1866:b0:374:baeb:2ec with SMTP id ffacd0b85a97d-3822590780fmr2529766f8f.19.1731685470967; Fri, 15 Nov 2024 07:44:30 -0800 (PST) X-Google-Smtp-Source: AGHT+IETahaIV9mtTGvxFkCPLrOgQcTAmwN2Stx5iKuksJH04zsnRBNKB/Jkw4SihSPWybIjWyLFCg== X-Received: by 2002:a05:6000:1866:b0:374:baeb:2ec with SMTP id ffacd0b85a97d-3822590780fmr2529751f8f.19.1731685470575; Fri, 15 Nov 2024 07:44:30 -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-3821ada3199sm4659986f8f.22.2024.11.15.07.44.29 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 15 Nov 2024 07:44:29 -0800 (PST) Message-ID: <0387fb65-7c90-4766-9b9b-a4fb77709837@redhat.com> Date: Fri, 15 Nov 2024 16:44:28 +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: <3269e0a6-29a4-478b-842a-629efc8d5d59@redhat.com> 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: l9WOYbctUv4j4iuI_vzy3gU2ZgZJdNZKUNNRwoCnflw_1731685471 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: 5945B1C001E X-Stat-Signature: kbdcm8s6gbqfc9i3a4kcgkf55un84t3z X-Rspam-User: X-HE-Tag: 1731685417-157425 X-HE-Meta: U2FsdGVkX18c8iaz8JTh51ORuP0y3JC+Xs8lKmkqihC6+45tkIAQ5tEovRlBpWZqURJdFWsomXjzSHODUDVqId9v5qtLDbSZxB5odV+Ne/lZmVcNSoamyaH9zsLhjBd/vksV1VDfkNwlq/0wNKBtn+pc0SlgbrbQCfxEQxWw9AwMzZxNOhvxDqOGDt2sR4jbqp5Dkab0LvLhUrpIl8/B+RE5bAmC2mnbH0JLTP/uLvbnwnTuArZHOiTVg8EE9Mlxvdtin/TSvYIkOmKqNumMfucUQuH4HLvlTVFtfFw8LnZhjU3d+E3iknvEX6qwQ281HjhMLL0HpRTOEKf+CreazGvv6Fn0ifi4bWoPk/DemN7K2iU1sav+h/LSDyLgmvhzTUmq0PpNSreobCWVctTDr34kvqrbJJa83WwpGbLxNwIwQebAfaeeu0/TirBKe7szzcJ7FvN3n9M0WUM/5WM1RVYLmq/26bGWjkb28u5XL37h0dgW/FoNZV2QlNwTUMtpzAwcTTfkL5X/OixJy1ZFWjUIaq5MhF6pe7su0bBUQi3UrffSKt9SO9kRdtlkaNn+Nt7lIb1Tlay2l3ScL7m8cnMPv4GaNNN50GP81x4gNsMnAq4KSko70fy6VNpaM1kuHwk/8L1cF8vRskoQDPpx0pePh7WGVtIvzDcyLwTuQcapolam9HSwDX+TtuWDEDU0DSjSoaKkKeWcM3Tyme5SsvT/tGdaDn5ZojaosoIDaUyhHpCuaAXkfpj+VgnlSqS5zq7hl/eX95lsODK82bsOstni8J/2sIPEScouZnbWDE+9Y49JddQ3+5n7yqkLDlxjGDPadAiNVcbOPYSfDyOqet3DrRyexGOLNxLUH90yrxNf0uCwh5wWuSw5hYXEcYREFhejynF6IL7tCZKuNWCqtvRbwP8UgSTGIugxTUZ+qqI/iWuqnrxNtuXnybkKAjm3x/AZ1p7tkDSBJxZ767u 9IN1ejYY TSx/B1PRdHTDSIrtrMS2YJ+puSu4OgiYk22M29QOMMA3P5y7/bl186dwxPwQ9bB2r6bJV+0o2ytofLVlwqBRzQpCFlKsi9OJ7YB0gdVw8nN2+dadkb5P4n+zCgx+y8NA8qgD8k44I/t5B3EL6dhO9WB+wYZEoFF0nkoM2akA3Hpg8bChPzK+INqTC+5rcajYbnEzLxy1bjha6I90dwaZmXOZSWUWt/sDjx0NvunbcwKvZpD/D9d6lVWvLlgWOFOU89EDsJ4AtL3wd8q2OiEyJUDDi8gin5tJ2+i2tYUWvryGBBsm3JQ/RYuxaIJeFtEmX2SBcD1PmT36gQZqD7qfJaH+rZSPoWkE+LV1zMCIW/0nTd92zh5tRVcGiTLrn6iaha1Si9rTQFniEUzyhEWVmzfCgKoj3O9Qg/hDeEpp5UyroRfUQpI9WCHUfnT8/1n5RKMhD 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 16:35, Daniel Gomez wrote: > On Fri Nov 15, 2024 at 2:35 PM CET, David Hildenbrand wrote: >> 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. > > I read it and I can't find where the use of "PMD-size huge folios" could > be a valid term. Tmpfs has never supported "folios", so I think using > "PMD-size huge pages" is more appropiate. Oh sorry, I completely agree. Yes, we should use that. -- Cheers, David / dhildenb