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(p200300d82f3c3f007177eb0cd3d24b0e.dip0.t-ipconnect.de. [2003:d8:2f3c:3f00:7177:eb0c:d3d2:4b0e]) by smtp.gmail.com with ESMTPSA id y5-20020a7bcd85000000b00410ab50f70fsm53748wmj.15.2024.02.13.14.21.49 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 13 Feb 2024 14:21:49 -0800 (PST) Message-ID: <659e1abb-40d0-42ba-ba0a-8256d7eb1c5a@redhat.com> Date: Tue, 13 Feb 2024 23:21:48 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 0/7] Split a folio to any lower order folios To: Zi Yan , "Pankaj Raghav (Samsung)" , linux-mm@kvack.org Cc: "Matthew Wilcox (Oracle)" , Yang Shi , Yu Zhao , "Kirill A . Shutemov" , Ryan Roberts , =?UTF-8?Q?Michal_Koutn=C3=BD?= , Roman Gushchin , Zach O'Keefe , Hugh Dickins , Mcgrof Chamberlain , Andrew Morton , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kselftest@vger.kernel.org References: <20240213215520.1048625-1-zi.yan@sent.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: <20240213215520.1048625-1-zi.yan@sent.com> 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-Stat-Signature: 4k1btpa67x5wfj5k7xi7usf6x6ze8hwk X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 441F9180029 X-Rspam-User: X-HE-Tag: 1707862916-578254 X-HE-Meta: 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 +P/Pfxf1 bPxV6V534TbWUf1GuHuFue9UZVhpSyMFtaJ/sLEo6oBfX+brpHN912zRp+7LbSwVAKLLSjB26mOtafOFjXyBL96e3PtymWNMuU8FAEhkfEEBxNhx2DgoweOwUIa0LCI5q+rt1mRBTwMaSeY6Jv4+2XA40cCzAkf4qnIMNARmmx6nZxFYGxntr2sVRn2q7IZZh/7EFwYR82BVWq81BHCnl/pY+Fgd4FymtNXQlxvBysZMdPWhaufqQQ6e1N71+kqZnSn4lTQwhHbsnvndpxN/It7FBZEjznL/3uxlQcmpuQSeG8oaC9FTaOVDm7nA5Tld0Nkn4wxoz/2QmQVkZwd66+PBNck5/rq/drjaxSOwhFNY85jYCnL/TPprt4GEmFcsP+9K9vaDMCq1ixwiRB9J/bP0C5t7vNlb5UzszPqWZhg5BU5TTv2ZMiyeNMZfRpkkXPhbn 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 13.02.24 22:55, Zi Yan wrote: > From: Zi Yan > > Hi all, > > File folio supports any order and multi-size THP is upstreamed[1], so both > file and anonymous folios can be >0 order. Currently, split_huge_page() > only splits a huge page to order-0 pages, but splitting to orders higher than > 0 is going to better utilize large folios. In addition, Large Block > Sizes in XFS support would benefit from it[2]. This patchset adds support for > splitting a large folio to any lower order folios and uses it during file > folio truncate operations. > > For Patch 6, Hugh did not like my approach to minimize the number of > folios for truncate[3]. I would like to get more feedback, especially > from FS people, on it to decide whether to keep it or not. I'm curious, would it make sense to exclude the "more" controversial parts (i.e., patch #6) for now, and focus on the XFS use case only? -- Cheers, David / dhildenb