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b=Q95lGb9166BzEJyLfy0LLHvUuYPGWc+Z6W/MAXsCT3gAU7fCm7+Kb8/wMtypdT629 lriPCYYOuOwA5gaQEXVTd1fDGd7EB3wAiw3y/p8FgLOYu20NvLzsJbqVKGcl2vRHUz fZo+1MVjpvlRW1xDw+wXrDVPDiG+twK7AYRFu9oc/8PFa7JYE67cnjqgGp6l5l9gCJ eGmwZyX4IiT4e5C5dzle6Et6a+4i8KygE8tNTxvNfJp9fttrYOL4yLqIPr+eYin5q4 Q3kX4G/PwlpY5Kxwb3SRo9ptdOj/uPcMPjPYQRfuM6tMBBM1Bb+o3PS94scXYLD2Ww ERhEGpmbEJyaA== Message-ID: Date: Tue, 7 Jul 2026 15:45:49 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/2] mm/mm_init: don't overlap NORMAL and MOVABLE zones with kernelcore=mirror To: Mike Rapoport , linux-mm@kvack.org Cc: Andrew Morton , Taku Izumi , Wei Yang , Yuan Liu , linux-kernel@vger.kernel.org References: <20260630072212.624305-1-rppt@kernel.org> <20260630072212.624305-2-rppt@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: <20260630072212.624305-2-rppt@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 27EC140008 X-Rspam-User: X-Stat-Signature: uba6ed4mqm4ooitay7kro1agiy1a5y4m X-Rspamd-Server: rspam03 X-HE-Tag: 1783431953-541371 X-HE-Meta: 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 YfDBIIEE h7lQ8uGojUaDoeFa8YX5BQygxSDxAEYwFaDJZ91DSP0RJb0+a8mHZuFKAJQols1Bt1AB2T8YTrXWo+1SgouppWSP8o8mPaF8FWGZ+yasYZ3tbFYFti895TYfvZa7/+iNslW2bIYJs6pPAQx8f7tvQ/uRdeMispawP74412IZfNzoqzHfpIyn7lKG7T/8pAx+VzeFs5rnFivrVF590bxf7wTIt2mIYSt71qyHMKkJsO5Pz1HMhIcm9bGqWjCUsMMKEgnpRnMapHfMYRLDiyYbYp5tYbcybBZePE766sdu+iMbC1Na+D0LjzsZwNXdad3GrY4PeehrdFlpFe7/ib62lIBS/9ZzhkoTl4HeLgOfTuSH9tX/FiUSEQxylDVsbg78j08MW00Z2zUQc9ml4NUtgCdoW2i9CPpZZW2nppPQJozoTT+4= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 6/30/26 09:22, Mike Rapoport wrote: > From: "Mike Rapoport (Microsoft)" > > When kernelcore or movablecore kernel parameters define size of the > NORMAL and MOVABLE zones as percents of the total memory or by absolute > value, ZONE_NORMAL is clamped at the beginning of ZONE_MOVABLE. > > However, when kernelcore=mirror the ZONE_NORMAL span is not changed but > rather pages from ZONE_MOVABLE counted as absent in ZONE_NORMAL. > > Make the behaviour of kernelcore= parameter uniform and treat mirror > just as another way to size the zones. > > Co-developed-by: Wei Yang > Signed-off-by: Wei Yang > Signed-off-by: Mike Rapoport (Microsoft) > --- Reviewed-by: David Hildenbrand (Arm) -- Cheers, David