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[2003:d8:2f3c:3a00:5662:26b3:3e5d:438e]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3b5e8e26c97sm4840237f8f.90.2025.07.11.08.39.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 11 Jul 2025 08:39:40 -0700 (PDT) Message-ID: <2ee1d2ca-94c5-4c27-b2dc-bcea2b710dcf@redhat.com> Date: Fri, 11 Jul 2025 17:39:39 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC Patch 2/2] selftests/mm: assert rmap behave as expected To: Wei Yang Cc: akpm@linux-foundation.org, lorenzo.stoakes@oracle.com, riel@surriel.com, Liam.Howlett@oracle.com, vbabka@suse.cz, harry.yoo@oracle.com, linux-mm@kvack.org, linux-kselftest@vger.kernel.org References: <20250604082145.13800-1-richard.weiyang@gmail.com> <20250604082145.13800-3-richard.weiyang@gmail.com> <20250604083441.hilkdzlxmxygivvt@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 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: <20250604083441.hilkdzlxmxygivvt@master> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: oCK6EDTFh4ZH-tJXK8T4k3sPYMJ7HgrRZgBoB9hwuxo_1752248381 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: rspam11 X-Rspam-User: X-Stat-Signature: 9qpykti6mi3937xcosto6sqsdh4nn7ms X-Rspamd-Queue-Id: 2EBEFA0004 X-HE-Tag: 1752248384-420609 X-HE-Meta: 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 yhUS04Vh 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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 04.06.25 10:34, Wei Yang wrote: > On Wed, Jun 04, 2025 at 08:21:45AM +0000, Wei Yang wrote: > [...] >> +int try_to_move_page(char *region) >> +{ >> + int ret; >> + int node; >> + int status = 0; >> + >> + ksft_print_msg("worker %d move_pages of content: %.15s\n", getpid(), region); > > One thing confused me here. > > If I don't access region here, the following move_pages() would report > -ENOENT occationally. The reason is do_pages_stat_array() -> > folio_walk_start() returns NULL. Right, the pages were not faulted in. The man page mentions that as "-ENOENT: The page is not present." -- Cheers, David / dhildenb