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(p200300d82f121b005d6bdb26e2b70012.dip0.t-ipconnect.de. [2003:d8:2f12:1b00:5d6b:db26:e2b7:12]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3a6e810010fsm4044551f8f.74.2025.06.25.01.59.22 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 25 Jun 2025 01:59:23 -0700 (PDT) Message-ID: <998ab0ce-6f11-4c0b-bc32-38fe2abd74b7@redhat.com> Date: Wed, 25 Jun 2025 10:59:21 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RFC 06/14] mm/huge_memory: support huge zero folio in vmf_insert_folio_pmd() To: Oscar Salvador Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, nvdimm@lists.linux.dev, Andrew Morton , Juergen Gross , Stefano Stabellini , Oleksandr Tyshchenko , Dan Williams , Alistair Popple , Matthew Wilcox , Jan Kara , Alexander Viro , Christian Brauner , Zi Yan , Baolin Wang , Lorenzo Stoakes , "Liam R. Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jann Horn , Pedro Falcato References: <20250617154345.2494405-1-david@redhat.com> <20250617154345.2494405-7-david@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: oO--7ypqfgslKWin-I5kUvZlzY2dhVwUyMah1Wm8dZU_1750841964 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspam-User: X-Stat-Signature: bo7o6cku4mhg7y7aiuzms96yx4c6w4mk X-Rspamd-Queue-Id: F2104160012 X-Rspamd-Server: rspam08 X-HE-Tag: 1750841968-986451 X-HE-Meta: U2FsdGVkX194KGFOxXDVrJIyzoEG99xrNHGbZj0sz9eQUQuOEIzA3CQODtDurxwDU+fDJwQ/xepqinWmD959hz2NdiylPoPZSOVufrZMU0soBkMl6mSaknS1AhWXBdJjdRK49dTxLl5OyCCsa/XY6JV56AUDvGFL+IWmkeDHztN40Q7+omgYx9W3AUS1zlPqhrHtwZDmVxs0WsOEPcc8qKq9egeaVerLKr9uCow8pZuVfvQOGZf3SmjQsD+KGWZCvz0fDHtaHOVu7eNi9OttuAYoGk69RnDujwPV0f9RtCztojADltcdkTD9GCCuO1DWc4RmHVVVBmoEPs5Gom6uAi8vTAt3+/HLVxSFYNpfRnvo0fER3jqmHLCVeTD2nF2wYa4TPKgFN8T2/+aEtSDCbhXEP6zcGkmTOAoCK6lrsLNdHXnI8IrHUqmbavmjYdd5BDpiFJjps13kMees7hjZI+j9f4q1HkkywcxpLWtx/2vUdarxGxnl1ewESS2VnLivjbaxt9RqxJmlh5lnrTBPHpnKbEoARWN5VctW1bgHPKGVDepUiD8FRMJJaEcqMqQxIOabA/i6JLF79HvnIlSQayV/B1TTZr3k/QsOefJtJ99u2Xnh8VQbiAMK+oMz5OYqmQ+WQq+C6/L9Z2IQU0TIboRe7XTchdpNGnjhKll6Kvu/V60rlwmUoMQvXeQ0em55V9Elv9I4qfFfNWcQjU7D/99pRDEYo4SVSLogjJq27iBrTLMT7pAfo3GovgxGV9r4AGa5jyEXTvc/uE7sHjUOHSPCBCZ+ZLaUd2MLz7DIbrgJ2Dt02t/roGfKbcnUOe/FUjRECPfu49KeeyJvNJmXEDH+pcTtolI51P0hZjO3Cy2Ls6jUTrEwRJ8ws9ptg/SmUORDiRtGf3rvZ67a+TPRREQNUesWAyYUkMhcSm02QmDoi/ONcXl/co4yKo+os6qf4dbHyWLV9vzVyFTbyxP VfbB9tFv Qm0RVj1iZOuSO8zKQl7cICjLFWUXZzZ9+IAK/Yx2oDeRBrQ89xlHpfdi2Swl66/2HGJ/P32p6dKjfW5eEedxWV6Gjh9jf681K8XcZmKOOaxU25ujHlakm38Dy7zyIiO1T0Lrtqm9P5HQMdpnBtXAHyAQtlQtGBCpiQatjpm4v8Mas/OITSSKCXJcAjUIfftwverU1mQHB1LsO3D1PP1mmcNO4dkWThohOLIJE1rr/AJXaq2BqXdvVuISroL0lmrA9bCKgrJVgH7eTg2G2NWLXb35Fju/fYsxEI8fpmwo+6DqI8wG7sNICvKp56X3MGSzLUGCLQiKFEKkIRudO0xcKNU2Z+rlSDGzz82lZ4LVjlKYz/jEBMdIiEnNc8jzQC62ZUSmsrrwzLjOoalryVuJDiE3lVjEkd9cwtagflsm+XMpcoSH2gJGHWwm+Lanhfr9yn+pErYvMUTU/GIE= 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 25.06.25 10:20, Oscar Salvador wrote: > On Tue, Jun 17, 2025 at 05:43:37PM +0200, David Hildenbrand wrote: >> Just like we do for vmf_insert_page_mkwrite() -> ... -> >> insert_page_into_pte_locked(), support the huge zero folio. > > It might just be me because I don't have the full context cached, but > I might have appreciated more info here :-). I can add something similar to what we have in patch #8, stating that we will change it to be special as well soon. Thanks! -- Cheers, David / dhildenb