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b=dExGaf5Q8RdDWbn69Ukl/DgYVpNelCUOqtGeHH/lNMOOd9ucomy6B+dwsxJPGkiLc rleITgoVMnHxhjsr94C6gUQLvYb0SySD+Pgii6Ca1uo3W0qCVZFulhUfhUl+E2dQF+ QPT4a0egAx01r4y84WjWWjv9zqoHCIEB3nDxzvMaNJA1ZOjte7yk2dOqa3VMKbEpHL 4NwQbyY/SYnBZO+Cvt82MWkYcxSNEnLPJlx5OGYD9JY44BS/YgEKY1739X2LwUoQnh Tk+EOjR0EZUU8O608frDUhAPWwF4EBMtlvgJDQqrDWLCuPVkNBax7ktBuo7UN9+49f 0YOR8b1i9TskQ== Message-ID: <48ab1aa2-4743-4671-8600-2e51cbb48dfe@kernel.org> Date: Thu, 9 Jul 2026 11:59:11 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 2/2] ksm: Use precise linear_page_index instead of the whole address space To: xu.xin16@zte.com.cn, akpm@linux-foundation.org Cc: chengming.zhou@linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20260709173312403qgj1Af6pRkFMDSsmc19sM@zte.com.cn> 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: <20260709173312403qgj1Af6pRkFMDSsmc19sM@zte.com.cn> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 2989B80003 X-Stat-Signature: e9bznothetqw8s4ngrda7fmxexeg4brc X-HE-Tag: 1783591156-743776 X-HE-Meta: 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 ivxMBF8S wxp82w+9TwGmYPtEhVPPbhOsgu/0g5dJIJV2IWcoa95L4UWVrblnFMwB8roXxDwyeKIDuSM93evLCDm0Qz+lw0gueCs68EuysQZZWie3yGUBlu5oSRyXP4f/UxyVlYWXihd4Q2DXRUHiIKlptwVyyYKE263w8/KEHswHV0X8Jei2GdntkTxoqBFHo3d+mTpaekUJ03D9Y5kNYdi3bZI1RfhGvyq9zUtQyzFxhjahaMNJpGas8fdfnlFCYknkaQWo4k5nDxkCsfnAkny2X8Pgn87EIBNyH1aJUikAAbdj5EcBpsv43Fjuq8DB5maETx6/J6Rf9PhFEbGsg38qNP+2u396fjsUp0dAifvULwKp2EV9csI5q+6CPMuqQXrRtkciSo2XQ Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 7/9/26 11:33, xu.xin16@zte.com.cn wrote: > From: xu xin > > Since we now have linear_page_index available that we can use here, > allowing for optimizing the RMAP walk, we can also use it to locate > more precisely all related-processes when error hits the KSM page, > which will decrease a lot of invalid iterations. > > Signed-off-by: xu xin > --- Acked-by: David Hildenbrand (Arm) -- Cheers, David