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[2003:d8:2f07:8700:71be:5385:87b8:5a98]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-45b42a8f972sm42502585e9.20.2025.08.19.05.31.05 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 19 Aug 2025 05:31:06 -0700 (PDT) Message-ID: <1df9b8da-6462-41ec-9dc5-df99dbd8ae8b@redhat.com> Date: Tue, 19 Aug 2025 14:31:05 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 3/4] mm/mm_init: drop deferred_init_maxorder() To: Mike Rapoport , Wei Yang Cc: linux-mm@kvack.org, 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> <408d7eaa-5aea-4490-9fd0-978c4eb94d32@redhat.com> <20250819092254.cddlg6npwl75fvbn@master> 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: X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: TKexq4JYBpP-jzCZEMZ94OJ1gbdUtixwsen1QmnWf2I_1755606668 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: rspam12 X-Rspamd-Queue-Id: CD3F380019 X-Stat-Signature: 9mp959ff5wfnarnkdwk943jywptp4hih X-Rspam-User: X-HE-Tag: 1755606670-697698 X-HE-Meta: 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 IrMQbCcQ 027kVLrwGmEFj4eFR9nPI5u7IEqHrLojI68C/cLEqxZT3cr4cmCuLu/uUnfYQ8vZQQVvFXIXvYlMvBweo78AEcuLRJyjX+VpvpXdZkp1rBHWILS+vegVMkSVkOpiMJ2tJJZzDGRAr6Z69MQMJanwyKWhpus1FKjN2qtUU 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: On 19.08.25 12:39, Mike Rapoport wrote: > On Tue, Aug 19, 2025 at 09:22:54AM +0000, Wei Yang wrote: >> On Tue, Aug 19, 2025 at 09:54:22AM +0200, David Hildenbrand wrote: >>>> -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? >> >> I think so. >> >> defer_init only apply to the highest zone in one node. > > Right, we defer initialization of last zone in every node and there is a > thread per node that does the initialization. Thanks, my memory comes back :) Reviewed-by: David Hildenbrand -- Cheers David / dhildenb