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b=er7ANTkYJBqwL1g+vXUe7IQfDHLUZ8ZzIlwYrjYgAJzWmuewZOuzijTOr1G9TmMhz 6dRajFMtFCt3t4zfjwNJCLxT5yKzQAQduTUO6SuW+Kw+PSS+aFdCZqhfu+EeBWkv79 uZ4PIlGzNug0PSAlDF/5q9oumhdg0L7oA9q8ExOWeKfJGKk21JNqa/Bkqa3y+tUVFS 5CAbiJigJlbQMNxVqG/oKIx/6eKxED+6neoM8nrk13nDe6+PU+bxxf1C1VdGhtNcp4 xgLiaom9MjCNLh4YKPQC+MiySDfugxh8l/B6gVQGetlHb2xJiMbzy3rS+GCTQBtwi4 0GKDYT3CzR4YA== Message-ID: Date: Tue, 3 Mar 2026 10:05:46 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] smaps: Report correct page sizes with THP To: Andi Kleen Cc: linux-mm@kvack.org, akpm@linux-foundation.org, Lorenzo Stoakes References: <20260225232708.87833-1-ak@linux.intel.com> <4a08a249-211b-40b9-b6bd-7c54af2b9d15@kernel.org> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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 B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzS5EYXZpZCBIaWxk ZW5icmFuZCAoQ3VycmVudCkgPGRhdmlkQGtlcm5lbC5vcmc+wsGQBBMBCAA6AhsDBQkmWAik AgsJBBUKCQgCFgICHgUCF4AWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaYJt/AIZAQAKCRBN 3hD3AP+DWriiD/9BLGEKG+N8L2AXhikJg6YmXom9ytRwPqDgpHpVg2xdhopoWdMRXjzOrIKD g4LSnFaKneQD0hZhoArEeamG5tyo32xoRsPwkbpIzL0OKSZ8G6mVbFGpjmyDLQCAxteXCLXz ZI0VbsuJKelYnKcXWOIndOrNRvE5eoOfTt2XfBnAapxMYY2IsV+qaUXlO63GgfIOg8RBaj7x 3NxkI3rV0SHhI4GU9K6jCvGghxeS1QX6L/XI9mfAYaIwGy5B68kF26piAVYv/QZDEVIpo3t7 /fjSpxKT8plJH6rhhR0epy8dWRHk3qT5tk2P85twasdloWtkMZ7FsCJRKWscm1BLpsDn6EQ4 jeMHECiY9kGKKi8dQpv3FRyo2QApZ49NNDbwcR0ZndK0XFo15iH708H5Qja/8TuXCwnPWAcJ DQoNIDFyaxe26Rx3ZwUkRALa3iPcVjE0//TrQ4KnFf+lMBSrS33xDDBfevW9+Dk6IISmDH1R HFq2jpkN+FX/PE8eVhV68B2DsAPZ5rUwyCKUXPTJ/irrCCmAAb5Jpv11S7hUSpqtM/6oVESC 3z/7CzrVtRODzLtNgV4r5EI+wAv/3PgJLlMwgJM90Fb3CB2IgbxhjvmB1WNdvXACVydx55V7 LPPKodSTF29rlnQAf9HLgCphuuSrrPn5VQDaYZl4N/7zc2wcWM7BTQRVy5+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: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: A8838140004 X-Stat-Signature: m31pw78kbbjqooamcfwpyrxyk9ukiek9 X-Rspam-User: X-HE-Tag: 1772528750-227877 X-HE-Meta: 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 Tu46Sb4T eAFjlzxp7Jux1yBFws1BxOJA/IgN86QK3y78SVoffOgzx2CYnbJSmiatblt2r8n5iiqM2P9EUHXKHb7mw41cVfY5hByFDynYzufi4cM7jpRsmy5KWhfzKnVqHaIWB2ClLpSGzpaTFpAtWgQACZ3UrNgJx0WfLVWkLNXieehz4W4fZwc/9Fi8pqy67wJV4ubGnCWE2ADhPoLY5dh+pLYYu+ewr9/9YdrJyFGeBsysSpHGdwxXai03zN2i/7pKj+PCVA4bE Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: >> Ideally, that will tell you "how much" of a certain contiguous size is >> mapped, if that contiguous size benefits somehow from TLB optimizations, >> etc. > > The key word is "somehow". It's better to work with real use cases > instead of such hypothetics. I don't have time to discuss this further, unfortunately, so NAK from my side. -- Cheers, David