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[2003:cb:c745:2300:653:c844:4858:570f]) by smtp.gmail.com with ESMTPSA id t11-20020adfe10b000000b00347edb20b6esm7345216wrz.106.2024.04.17.08.00.35 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 17 Apr 2024 08:00:36 -0700 (PDT) Message-ID: Date: Wed, 17 Apr 2024 17:00:31 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: Request for clarification regarding huge pages and remapping of virtual to physical address To: sunil bhargo , "linux-mm@kvack.org" Cc: "mounesh.b@gmail.com" References: <245378552.87900.1713345083646.ref@mail.yahoo.com> <245378552.87900.1713345083646@mail.yahoo.com> <1998899028.91244.1713348575745@mail.yahoo.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 ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZgEEwEIAEICGwMGCwkIBwMCBhUIAgkKCwQW AgMBAh4BAheAAhkBFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAl8Ox4kFCRKpKXgACgkQTd4Q 9wD/g1oHcA//a6Tj7SBNjFNM1iNhWUo1lxAja0lpSodSnB2g4FCZ4R61SBR4l/psBL73xktp rDHrx4aSpwkRP6Epu6mLvhlfjmkRG4OynJ5HG1gfv7RJJfnUdUM1z5kdS8JBrOhMJS2c/gPf wv1TGRq2XdMPnfY2o0CxRqpcLkx4vBODvJGl2mQyJF/gPepdDfcT8/PY9BJ7FL6Hrq1gnAo4 3Iv9qV0JiT2wmZciNyYQhmA1V6dyTRiQ4YAc31zOo2IM+xisPzeSHgw3ONY/XhYvfZ9r7W1l pNQdc2G+o4Di9NPFHQQhDw3YTRR1opJaTlRDzxYxzU6ZnUUBghxt9cwUWTpfCktkMZiPSDGd KgQBjnweV2jw9UOTxjb4LXqDjmSNkjDdQUOU69jGMUXgihvo4zhYcMX8F5gWdRtMR7DzW/YE BgVcyxNkMIXoY1aYj6npHYiNQesQlqjU6azjbH70/SXKM5tNRplgW8TNprMDuntdvV9wNkFs 9TyM02V5aWxFfI42+aivc4KEw69SE9KXwC7FSf5wXzuTot97N9Phj/Z3+jx443jo2NR34XgF 89cct7wJMjOF7bBefo0fPPZQuIma0Zym71cP61OP/i11ahNye6HGKfxGCOcs5wW9kRQEk8P9 M/k2wt3mt/fCQnuP/mWutNPt95w9wSsUyATLmtNrwccz63XOwU0EVcufkQEQAOfX3n0g0fZz Bgm/S2zF/kxQKCEKP8ID+Vz8sy2GpDvveBq4H2Y34XWsT1zLJdvqPI4af4ZSMxuerWjXbVWb T6d4odQIG0fKx4F8NccDqbgHeZRNajXeeJ3R7gAzvWvQNLz4piHrO/B4tf8svmRBL0ZB5P5A 2uhdwLU3NZuK22zpNn4is87BPWF8HhY0L5fafgDMOqnf4guJVJPYNPhUFzXUbPqOKOkL8ojk CXxkOFHAbjstSK5Ca3fKquY3rdX3DNo+EL7FvAiw1mUtS+5GeYE+RMnDCsVFm/C7kY8c2d0G NWkB9pJM5+mnIoFNxy7YBcldYATVeOHoY4LyaUWNnAvFYWp08dHWfZo9WCiJMuTfgtH9tc75 7QanMVdPt6fDK8UUXIBLQ2TWr/sQKE9xtFuEmoQGlE1l6bGaDnnMLcYu+Asp3kDT0w4zYGsx 5r6XQVRH4+5N6eHZiaeYtFOujp5n+pjBaQK7wUUjDilPQ5QMzIuCL4YjVoylWiBNknvQWBXS lQCWmavOT9sttGQXdPCC5ynI+1ymZC1ORZKANLnRAb0NH/UCzcsstw2TAkFnMEbo9Zu9w7Kv AxBQXWeXhJI9XQssfrf4Gusdqx8nPEpfOqCtbbwJMATbHyqLt7/oz/5deGuwxgb65pWIzufa N7eop7uh+6bezi+rugUI+w6DABEBAAHCwXwEGAEIACYCGwwWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCXw7HsgUJEqkpoQAKCRBN3hD3AP+DWrrpD/4qS3dyVRxDcDHIlmguXjC1Q5tZTwNB boaBTPHSy/Nksu0eY7x6HfQJ3xajVH32Ms6t1trDQmPx2iP5+7iDsb7OKAb5eOS8h+BEBDeq 3ecsQDv0fFJOA9ag5O3LLNk+3x3q7e0uo06XMaY7UHS341ozXUUI7wC7iKfoUTv03iO9El5f XpNMx/YrIMduZ2+nd9Di7o5+KIwlb2mAB9sTNHdMrXesX8eBL6T9b+MZJk+mZuPxKNVfEQMQ a5SxUEADIPQTPNvBewdeI80yeOCrN+Zzwy/Mrx9EPeu59Y5vSJOx/z6OUImD/GhX7Xvkt3kq Er5KTrJz3++B6SH9pum9PuoE/k+nntJkNMmQpR4MCBaV/J9gIOPGodDKnjdng+mXliF3Ptu6 3oxc2RCyGzTlxyMwuc2U5Q7KtUNTdDe8T0uE+9b8BLMVQDDfJjqY0VVqSUwImzTDLX9S4g/8 kC4HRcclk8hpyhY2jKGluZO0awwTIMgVEzmTyBphDg/Gx7dZU1Xf8HFuE+UZ5UDHDTnwgv7E th6RC9+WrhDNspZ9fJjKWRbveQgUFCpe1sa77LAw+XFrKmBHXp9ZVIe90RMe2tRL06BGiRZr jPrnvUsUUsjRoRNJjKKA/REq+sAnhkNPPZ/NNMjaZ5b8Tovi8C0tmxiCHaQYqj7G2rgnT0kt WNyWQQ== Organization: Red Hat In-Reply-To: <1998899028.91244.1713348575745@mail.yahoo.com> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Stat-Signature: 8mxrwpdoohyoinftutge3pnhz7zoexjj X-Rspamd-Queue-Id: BB2D180023 X-Rspamd-Server: rspam06 X-Rspam-User: X-HE-Tag: 1713366040-358564 X-HE-Meta: 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 Bxlz6qb8 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000019, 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 17.04.24 12:09, sunil bhargo wrote: > David, > Thanks for your response. So if i get it right then reserving the memory > at boot time with/without the huge page, the page migration can happen ? I *think* even hugetlb folios allocated/reserved during early boot can be migrated in memory later. The chance of that happening is small, though. Or I might be wrong :) Migration of gigantic huge pages (e.g., 1 GiB) is even more unlikely to happen. -- Cheers, David / dhildenb