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[2003:d8:2f17:9c00:d650:ab5f:74c2:2175]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3e7521bfd08sm5935249f8f.4.2025.09.10.02.09.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 10 Sep 2025 02:09:11 -0700 (PDT) Message-ID: Date: Wed, 10 Sep 2025 11:09:10 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] mm/hugetlb: skip report_hugepages() output when no hugepages configured To: lirongqing , muchun.song@linux.dev, osalvador@suse.de, akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20250910090316.3406-1-lirongqing@baidu.com> 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: <20250910090316.3406-1-lirongqing@baidu.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: G5ansXJ1HOQ9CvlFrOcBgG-sGGLQIi3kSjLqPCU1KCU_1757495353 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 118F7A0004 X-Stat-Signature: s54cdyj7hsqw8atydu3twbbd31purotn X-HE-Tag: 1757495355-558249 X-HE-Meta: U2FsdGVkX1+qkT6kIH9dRsRPFEGiU8ekK2ADNLUKZqf9qC7mU5LK8KhPS3yf2wSLniGMcdFuH7htXpumG+TIs2HncKKRa1In57aXzT6abpNC5fEGn3A9pu5onTswXcmIiWFzKQUbot8BarWWXyyUevhL5sLM/BaJut0b5v+102R7cTU1wpv2B44S7Kq8mnWKQI50qd5r+aBNYkYnYlYmsQDO4RDUov29yu8OWG3nfZRE/m3j3oKVktNzCZl8ruI5DxbHAIGXh4kXwUCJpRBOlB3YUsQ63pmiUvaAuJzBrVPU8wthS6F7AJ2n3WSCOLO6rwu/vqK4Jmr3iXdWWgo57QAmHziay4DkrSdvoDWNXMW62fWhYB8tGoVvwGSyScsUMKUgY/zR2h3NhnpnSwLuin46KshfRdziEp5weh2+FV1HQh7kx1M+s5y1JjKQKBTAT07jkZrX0Dkz4FqqoMzmEblz9aqOHFRKNNgepdKdDwee2+arqMid9LjhryQbWdGD7Khpfxd+X3hqhvV2bGHwkT5pov0huWNlQUzpWsYlt7AAS3jN0PNEtaORP0Ov7yToGkRQ8meAC14t0ClLHeCQns+SZ2pegKll0cp+YsieY9f1UeZKF/4oADWEtRZ6bc5oRLsjadihJLkU9dsu1RslqpoX0eoZRVKIPmyjzwA/1pxLstPK+I2Y+VxCOYkWClUx6i/oVFIsh84DBOAABzWTzUG3b5AjBghK3qUyo1gUPmCAitCk3SODNUGCUmcGrIM2D/lCIKJ9pLFjj0xApmg1LxujXrmhiMXo3Rj+breG1s87gkyX92pkcdHWPy29gqO9thfkXY7+sVLUs6WH8Ox+KO/apRD6IbN9bcgsLXYwPfLZwE35wkWSbAh5GpnFN/QgMPf1FoQawfSAUJz3Md4cFXqG8oWY6j10Y0rdWobUMoo36IeK4ymWp0lBLjfBUAMOeoNENJZzDcgFjGhRpIs IWShugFG 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 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 10.09.25 11:03, lirongqing wrote: > From: Li RongQing > > Avoid unnecessary report_hugepages() output and processing when > max_huge_pages is 0. This eliminates redundant log messages for > unconfigured hugepage sizes and saves CPU cycles during boot. > > Before this change, the kernel would always print registration messages > even for hugepage sizes with zero pre-allocated pages: > > [ 4.118953] HugeTLB: registered 2.00 MiB page size, pre-allocated 0 pages > [ 4.122920] HugeTLB: 28 KiB vmemmap can be freed for a 2.00 MiB page > [ 4.126920] HugeTLB: registered 1.00 GiB page size, pre-allocated 0 pages > [ 4.130920] HugeTLB: 16380 KiB vmemmap can be freed for a 1.00 GiB page > > Now these messages are suppressed when no pages are configured. Well, there is valuable information in there, especially given that we can allocate these hugetlb pages later. So I think we want to keep printing that information. -- Cheers David / dhildenb