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(p200300d82f3c3a00566226b33e5d438e.dip0.t-ipconnect.de. [2003:d8:2f3c:3a00:5662:26b3:3e5d:438e]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-442fd583e84sm143807005e9.25.2025.05.19.10.40.33 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 19 May 2025 10:40:33 -0700 (PDT) Message-ID: <1296c1ee-cb0a-456d-b5b4-e6153928d32a@redhat.com> Date: Mon, 19 May 2025 19:40:32 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/4] mm: ksm: have KSM VMA checks not require a VMA pointer To: Lorenzo Stoakes , Andrew Morton Cc: Alexander Viro , Christian Brauner , Jan Kara , "Liam R . Howlett" , Vlastimil Babka , Jann Horn , Pedro Falcato , Xu Xin , Chengming Zhou , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org References: 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: bsBCF06MLF9FpC4IPoiAJWqICbLMeAxXmD52Kcg6iwI_1747676434 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: 9urfji75mo98mtgx37omo6otte4h59ye X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 9BAF11C0007 X-HE-Tag: 1747676439-46571 X-HE-Meta: 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 RWudve1P zAPmm83bKMJIL8jsrx7hbNDkx93iFfEbgVYb1ttC21vgoPmfuDCNcW8BwFFIhHIJ736ta04ouqhwiQRS5oq2k83sp7nuxWVyFMbZhjEVduIsekq4HCKl6F5TEAecHttjBavMZ0sqjkePIMm/f8kVQxZa/nIJmbHRsv6R31MEEu5YiJnP8HyNCbBvzz1KGJwFiTHv4BuShHi0vhoAoT3kWyao+Fz/CLYww9LV02qNAwiuYLsdZZwda1k2NNlFURAhoZMAaG5xj0QWsaJTfrnnbmOoyIrVcXU8mbOtch0k6ddxgfN5PXk9swqyCc+Pd2/Q6PD3I2Wx7X0/RfqM7zXkWQcIfsktqRZEKMDqBv/3cgsYg9aeYk0V5OBV+CiVvmGtXcWYnhV7BJYkcjNyMDBwPPHgIuvubyRAxu/5fCKMb+uu7TH2SLNh6qvjYiBF7l+ikQAqt6fEJQwhf8S5GwGeRuWIlzVvwpZJQ8R2a 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 19.05.25 10:51, Lorenzo Stoakes wrote: > In subsequent commits we are going to determine KSM eligibility prior to a > VMA being constructed, at which point we will of course not yet have access > to a VMA pointer. > > It is trivial to boil down the check logic to be parameterised on > mm_struct, file and VMA flags, so do so. > > As a part of this change, additionally expose and use file_is_dax() to > determine whether a file is being mapped under a DAX inode. > > Signed-off-by: Lorenzo Stoakes > --- Looking all good :) Acked-by: David Hildenbrand -- Cheers, David / dhildenb