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(p200300d82f0cc200fa4ac4ff1b3221ce.dip0.t-ipconnect.de. [2003:d8:2f0c:c200:fa4a:c4ff:1b32:21ce]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4711442dbaesm234245435e9.8.2025.10.20.07.18.43 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 20 Oct 2025 07:18:44 -0700 (PDT) Message-ID: Date: Mon, 20 Oct 2025 16:18:43 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 2/4] mm/shmem: Support vm_uffd_ops API To: Peter Xu , linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: Mike Rapoport , Muchun Song , Nikita Kalyazin , Vlastimil Babka , Axel Rasmussen , Andrew Morton , James Houghton , Lorenzo Stoakes , Hugh Dickins , Michal Hocko , Ujwal Kundur , "Liam R . Howlett" , Oscar Salvador , Suren Baghdasaryan , Andrea Arcangeli References: <20251014231501.2301398-1-peterx@redhat.com> <20251014231501.2301398-3-peterx@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 ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZoEEwEIAEQCGwMCF4ACGQEFCwkIBwICIgIG FQoJCAsCBBYCAwECHgcWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaJzangUJJlgIpAAKCRBN 3hD3AP+DWhAxD/9wcL0A+2rtaAmutaKTfxhTP0b4AAp1r/eLxjrbfbCCmh4pqzBhmSX/4z11 opn2KqcOsueRF1t2ENLOWzQu3Roiny2HOU7DajqB4dm1BVMaXQya5ae2ghzlJN9SIoopTWlR 0Af3hPj5E2PYvQhlcqeoehKlBo9rROJv/rjmr2x0yOM8qeTroH/ZzNlCtJ56AsE6Tvl+r7cW 3x7/Jq5WvWeudKrhFh7/yQ7eRvHCjd9bBrZTlgAfiHmX9AnCCPRPpNGNedV9Yty2Jnxhfmbv Pw37LA/jef8zlCDyUh2KCU1xVEOWqg15o1RtTyGV1nXV2O/mfuQJud5vIgzBvHhypc3p6VZJ lEf8YmT+Ol5P7SfCs5/uGdWUYQEMqOlg6w9R4Pe8d+mk8KGvfE9/zTwGg0nRgKqlQXrWRERv cuEwQbridlPAoQHrFWtwpgYMXx2TaZ3sihcIPo9uU5eBs0rf4mOERY75SK+Ekayv2ucTfjxr Kf014py2aoRJHuvy85ee/zIyLmve5hngZTTe3Wg3TInT9UTFzTPhItam6dZ1xqdTGHZYGU0O otRHcwLGt470grdiob6PfVTXoHlBvkWRadMhSuG4RORCDpq89vu5QralFNIf3EysNohoFy2A LYg2/D53xbU/aa4DDzBb5b1Rkg/udO1gZocVQWrDh6I2K3+cCs7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: <20251014231501.2301398-3-peterx@redhat.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: t4xvU0PoUY740VPEzuKoiwZBfY4LmwZV4cSmezUaUVw_1760969926 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-Rspamd-Queue-Id: A649EC0010 X-Rspamd-Server: rspam02 X-Stat-Signature: 4fsusyzwh7rzub4q7nu6bzncnxii1nck X-HE-Tag: 1760969929-961247 X-HE-Meta: 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 GPgzDGd6 mz1fVx5ukcHigSHyvBSxZGZtwZtryQfENmqCfKXPlh31t3IgQvq5t7wRNQ00OvD3Jh32c9tWhBqaKiE9IAx5mWqj6LZLZg9VA0Dan7RpDKA6m5gwY7ElO2cVneqtWlmPqRRnNxu4QVU03YRkWg+Pow95zStJ+yekdKEG+ 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 15.10.25 01:14, Peter Xu wrote: > Add support for the new vm_uffd_ops API for shmem. Note that this only > introduces the support, the API is not yet used by core mm. > > It only needs a separate minor_get_folio() definition but that's oneliner. > > Due to the limitation of the current vm_uffd_ops on MISSING mode support, > the shmem UFFDIO_COPY/ZEROPAGE process are still hard-coded in mm/. > > Cc: Hugh Dickins > Acked-by: Mike Rapoport > Signed-off-by: Peter Xu > --- Acked-by: David Hildenbrand -- Cheers David / dhildenb