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[2003:d8:2f38:1d00:657c:2aac:ecf5:5df8]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3b4708d0ae0sm9483726f8f.33.2025.07.07.00.27.50 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 07 Jul 2025 00:27:50 -0700 (PDT) Message-ID: <9ee49c32-0cc5-4cb0-a7d5-979af9f8d5f1@redhat.com> Date: Mon, 7 Jul 2025 09:27:49 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 1/5] mm: introduce num_pages_contiguous() To: lizhe.67@bytedance.com, alex.williamson@redhat.com, akpm@linux-foundation.org, jgg@ziepe.ca, peterx@redhat.com Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org References: <20250707064950.72048-1-lizhe.67@bytedance.com> <20250707064950.72048-2-lizhe.67@bytedance.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: <20250707064950.72048-2-lizhe.67@bytedance.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: rbwpcAPwaA7Y_8yEbTe6nBz0MASYjZyGsraw-tKTm5U_1751873272 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: rspam10 X-Rspamd-Queue-Id: 77E581C0016 X-Rspam-User: X-Stat-Signature: 1tnn8tn1tdst87w3tsrfwiu15h35q74w X-HE-Tag: 1751873275-293322 X-HE-Meta: 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 iqe9F4cV 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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: On 07.07.25 08:49, lizhe.67@bytedance.com wrote: > From: Li Zhe > > Function num_pages_contiguous() determine the number of contiguous > pages starting from the first page in the given array of page pointers. > VFIO will utilize this interface to accelerate the VFIO DMA map process. > > Suggested-by: David Hildenbrand > Suggested-by: Jason Gunthorpe > Signed-off-by: Li Zhe > --- Acked-by: David Hildenbrand -- Cheers, David / dhildenb