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[2003:d8:2f45:5500:8267:647f:4209:dedd]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-442cd32835dsm62966135e9.6.2025.05.09.00.33.38 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 09 May 2025 00:33:40 -0700 (PDT) Message-ID: Date: Fri, 9 May 2025 09:33:38 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1] selftests/mm: add simple VM_PFNMAP tests based on mmap'ing /dev/mem To: Dev Jain , linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linux-kselftest@vger.kernel.org, Andrew Morton , Shuah Khan , Lorenzo Stoakes , Ingo Molnar , Peter Xu References: <20250508222041.1647645-1-david@redhat.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: X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: d6mb3KaqRPNvufsrGpFF4lGPdujpX1Q3Sz-hvKg8NBE_1746776022 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 847F94000A X-Stat-Signature: b9nh9r158uma4hog976io9s71yzp48gh X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1746776025-34618 X-HE-Meta: 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 HLnPEMIu o5lNIitB8PmZYPERwTF9bsNjoAXGsQCVjovuagt6IMDBIN0YBOHsp6jaAgxiuPlA8O+a5oWTIUwsNMhsgBfp2rbn9JYXBNk0qmPJYaLsFzKRsB3oc9RrDJ/7x61Vp+BoD/IpoTQSC00qYLm5jF25VqF6N2M7Y4eStztHGjHlDzThI1xwqHpxvSLDyqc/dETI28fRgqjC95PUvhnaFUcGPP/t2Q8skbI/25xF3s0rku9Dkjv54qt7QJRILtm/1HEJ8tpEVqpL7Cmv0DlXSUANVHppFGa6llJPCi8hij53AEmGmlGfEvrXwfX0b/vejxZlag8wM7sKxuzLGJFbXKgCVb119B+6mKPbt68pfowjP2fhh5n6+6c/Nh6yIRllgMICniAM9U4/mplYJMGihzny4jTfxbGsxCyzBJZL9x1Tg7vdqGSNtzkyQkkAX8yE10fW4ogd4SWkeI1zTW8s0tgi92RInxGNAByi6cAQ/ 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 09.05.25 07:35, Dev Jain wrote: > > > On 09/05/25 3:50 am, David Hildenbrand wrote: >> Let's test some basic functionality using /dev/mem. These tests will >> implicitly cover some PAT (Page Attribute Handling) handling on x86. >> >> These tests will only run when /dev/mem access to the first two pages >> in physical address space is possible and allowed; otherwise, the tests >> are skipped. > Hi Dev, > Some generic comments: > 1. I think you should also update .gitignore? I wonder if we could add a checkpatch warning for that, it keeps on happening :) > 2. You can use ksft_exit_fail_perror() for wherever you want to print > strerror(errno). Makes sense, thanks! -- Cheers, David / dhildenb