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[2003:d8:2f07:8700:71be:5385:87b8:5a98]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3c074d43bc6sm2574711f8f.25.2025.08.19.00.54.22 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 19 Aug 2025 00:54:23 -0700 (PDT) Message-ID: <408d7eaa-5aea-4490-9fd0-978c4eb94d32@redhat.com> Date: Tue, 19 Aug 2025 09:54:22 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 3/4] mm/mm_init: drop deferred_init_maxorder() To: Mike Rapoport , linux-mm@kvack.org Cc: Andrew Morton , Bill Wendling , Daniel Jordan , Justin Stitt , Michael Ellerman , Miguel Ojeda , Nathan Chancellor , Nick Desaulniers , linux-kernel@vger.kernel.org, llvm@lists.linux.dev References: <20250818064615.505641-1-rppt@kernel.org> <20250818064615.505641-4-rppt@kernel.org> 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 ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZoEEwEIAEQCGwMCF4ACGQEFCwkIBwICIgIG FQoJCAsCBBYCAwECHgcWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaJzangUJJlgIpAAKCRBN 3hD3AP+DWhAxD/9wcL0A+2rtaAmutaKTfxhTP0b4AAp1r/eLxjrbfbCCmh4pqzBhmSX/4z11 opn2KqcOsueRF1t2ENLOWzQu3Roiny2HOU7DajqB4dm1BVMaXQya5ae2ghzlJN9SIoopTWlR 0Af3hPj5E2PYvQhlcqeoehKlBo9rROJv/rjmr2x0yOM8qeTroH/ZzNlCtJ56AsE6Tvl+r7cW 3x7/Jq5WvWeudKrhFh7/yQ7eRvHCjd9bBrZTlgAfiHmX9AnCCPRPpNGNedV9Yty2Jnxhfmbv Pw37LA/jef8zlCDyUh2KCU1xVEOWqg15o1RtTyGV1nXV2O/mfuQJud5vIgzBvHhypc3p6VZJ lEf8YmT+Ol5P7SfCs5/uGdWUYQEMqOlg6w9R4Pe8d+mk8KGvfE9/zTwGg0nRgKqlQXrWRERv cuEwQbridlPAoQHrFWtwpgYMXx2TaZ3sihcIPo9uU5eBs0rf4mOERY75SK+Ekayv2ucTfjxr Kf014py2aoRJHuvy85ee/zIyLmve5hngZTTe3Wg3TInT9UTFzTPhItam6dZ1xqdTGHZYGU0O otRHcwLGt470grdiob6PfVTXoHlBvkWRadMhSuG4RORCDpq89vu5QralFNIf3EysNohoFy2A LYg2/D53xbU/aa4DDzBb5b1Rkg/udO1gZocVQWrDh6I2K3+cCs7BTQRVy5+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: <20250818064615.505641-4-rppt@kernel.org> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: HjzwiP27AQVi3-VO-fhnxIU8bxR1gjiWuMfdA9Xmh8U_1755590064 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 239DE1A0003 X-Stat-Signature: 4knkuz1yrefofb81ii5kk7qijewyo57f X-Rspam-User: X-HE-Tag: 1755590068-210955 X-HE-Meta: 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 GaBSv0g3 ArUV8xjsOdqW5qLpGyxxVLruqjnNDxLiJprXsBH7jDlW4J3KZv37yisvtpn0fKPBElr/EZnYXRm/vZaY7A2LEV5CtW5KmOabKFYw9Mo159H0shGd2tOytVDPFLWFWDLaFsYTF24dx+NZwyRqvkZnGy0kWyiThbnG0qy9c 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: > > -static unsigned long __init > -deferred_init_memmap_chunk(unsigned long start_pfn, unsigned long end_pfn, > - struct zone *zone) > -{ > - unsigned long nr_pages = 0; > - unsigned long spfn, epfn; > - u64 i = 0; > + while (spfn < epfn) { > + unsigned long mo_pfn = ALIGN(spfn + 1, MAX_ORDER_NR_PAGES); > + unsigned long chunk_end = min(mo_pfn, epfn); > > - deferred_init_mem_pfn_range_in_zone(&i, zone, &spfn, &epfn, start_pfn); > + nr_pages += deferred_init_pages(zone, spfn, chunk_end); > + deferred_free_pages(spfn, chunk_end - spfn); I assume the expectation is that all PFNs in the start_pfn -> end_pfn range will go to this zone, correct? -- Cheers David / dhildenb