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(p200300cbc721a0007426f6b482a3c6ab.dip0.t-ipconnect.de. [2003:cb:c721:a000:7426:f6b4:82a3:c6ab]) by smtp.gmail.com with ESMTPSA id u11-20020a05600c19cb00b0040a507f546fsm5198631wmq.8.2023.11.24.01.02.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 24 Nov 2023 01:02:11 -0800 (PST) Message-ID: <659f0f6b-0fe2-4238-a6ae-5fd310c1a4ba@redhat.com> Date: Fri, 24 Nov 2023 10:02:10 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RESEND PATCH v7 00/10] Small-sized THP for anonymous memory To: Zi Yan Cc: Matthew Wilcox , Ryan Roberts , Andrew Morton , Yin Fengwei , Yu Zhao , Catalin Marinas , Anshuman Khandual , Yang Shi , "Huang, Ying" , Luis Chamberlain , Itaru Kitayama , "Kirill A. Shutemov" , John Hubbard , David Rientjes , Vlastimil Babka , Hugh Dickins , Kefeng Wang , linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20231122162950.3854897-1-ryan.roberts@arm.com> <7f76ee6c-f0e6-443b-bcff-3637895dec66@redhat.com> <7d4efbe8-5690-4db0-be06-399353679982@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-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 8CD5140016 X-Rspam-User: X-Stat-Signature: syzcxaax8asxrherctwpg1bg8nm834u5 X-Rspamd-Server: rspam01 X-HE-Tag: 1700816536-847941 X-HE-Meta: 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 E6CLAmU9 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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: >> So we're really only concerned about: >> * AnonHugePages >> * ShmemHugePages >> * FileHugePages >> >> The question is if we really want to continue extending/adjusting the old meminfo interfaces and talk about how to perform accounting there. >> >> Because, as we learned, we might get a new file-based sysfs based interface, because Greg seems to be against exposing new values in the old single-file-based one. > > I am not aware of this. And it is interesting. Do you have a pointer? Sure: https://lore.kernel.org/all/2023110216-labrador-neurosis-1e6e@gregkh/T/#u > >> >> In a new one, we have all freedom to expose what we actually want nowadays, and can just document that the old interface was designed with the assumption that there is only a single THP size. > > This sounds like a good strategy and hopefully we could design the new THP interface > more future proof. Yes! -- Cheers, David / dhildenb