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b=i3K9gL0d0vGJgeW/4yq3DuB8Y0szAcLlky161nsJ0ZYQZ4jxaJKDA06P3e0aA5pjN L9tIorPRZApR2PjBbeBhqpAHjI2bKF5ZCthuhUGuW0l205JYlAoZAOWyPGsSxaOa8Z xc2F3fILAAeudO8d0ylQxlmpLLlTfrLjJwDTdHj/o47m+zFAU06I4W8y0wubZBNJXB RWfWYX0i1SQ5XZr/JM7/BRbbgZoLEftD0K4FTTfevcBIdJfkNngNV5XsHLYxtkKD6Z HiKL/hsFn0X9bW7EBHYYQYBge24GHD9aLLO2jh7Q9QPExaPpNsdFvV77+iHMzLESnU vr/RdOYsRSFpg== Message-ID: <2fef4fae-b7fd-4c27-9a76-994076e27b5f@kernel.org> Date: Wed, 22 Apr 2026 09:46:35 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 0/2] mm/memory hotplug/unplug: Optimize zone contiguous check when changing pfn range To: Yuan Liu , Oscar Salvador , Mike Rapoport , Wei Yang Cc: linux-mm@kvack.org, Yong Hu , Nanhai Zou , Tim Chen , Qiuxu Zhuo , Yu C Chen , Pan Deng , Tianyou Li , Chen Zhang , linux-kernel@vger.kernel.org References: <20260421125508.2317429-1-yuan1.liu@intel.com> 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: <20260421125508.2317429-1-yuan1.liu@intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Stat-Signature: rnni8533s6an4g9xe7jrf4brut7yg1ob X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 5346010000A X-HE-Tag: 1776844003-735077 X-HE-Meta: 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 IDzbjxrZ aQLVAruRx24eMiAn3uqb2E0DKA6sz5brnkmZdUCGRSFxUPEQ5P0LM/e9vdWok3osshGOmbnILrSrVL20v64WFopR3psBUca9T+2NruVYrtkBamxxgBxnUmHZMiGU1a0EXkHWHkDXOREJC+wT6IyUD1d4q603pexzzbfxodlcWekMGT8rEDtUR5KNCvnhg/hHVth1YLDGDmUspPOcsXS1aUmrgy/iCG4vxho4qgERZOFg0gr0lroe8SZsI5I/748cA8TbMGtUrD3BESGOG2iizTnAhSmSAXqLGmU25pN2vVyCBRvmpcl7oim2DCQ6wGhBteQp48bTpkXGoyHE1K1t2GSfmqxU7L7YT4NI5MK/FZ8wUnk9obx3rkTRyCA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 4/21/26 14:55, Yuan Liu wrote: > This series cleans up the overlap memory map init check and > optimizes zone contiguous check when changing pfn range. > > In addition to providing a significant improvement for VM hotplug > (see the second patch for reference), it brings benefits for CXL > hotplug as well. The link is as follows > https://lore.kernel.org/all/20260409023552.GA2807@AE/ > > v3 link: > https://lore.kernel.org/all/20260408031615.1831922-1-yuan1.liu@intel.com/ > > v4 changes: > Add a new patch for clean up overlap memory map init check Didn't you also wanted to add a patch to improve shrink_zone_span to check both sides of the PAGES_PER_SUBSECTION block for fitting nid+zid? -- Cheers, David