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[79.242.61.248]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-440a52f8915sm18804175e9.7.2025.04.25.02.27.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 25 Apr 2025 02:27:02 -0700 (PDT) Message-ID: Date: Fri, 25 Apr 2025 11:27:00 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 00/11] mm: rewrite pfnmap tracking and remove VM_PAT To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-trace-kernel@vger.kernel.org, Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , David Airlie , Simona Vetter , Andrew Morton , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , "Liam R. Howlett" , Lorenzo Stoakes , Vlastimil Babka , Jann Horn , Pedro Falcato , Peter Xu References: <20250425081715.1341199-1-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: Cv3Q9ph1aZ9lOMk5pj01cQ8jSgBrR6UjGNRNcqrXI6M_1745573223 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: rspam02 X-Rspamd-Queue-Id: DF33C1A0008 X-Stat-Signature: z1st9cyaoo87zi7jytscdoj4zgazakne X-HE-Tag: 1745573226-570265 X-HE-Meta: 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 mns2MH/v dE4Lq7iwj4GWMbUwO9+v83vSh+qVllP37bJP/25pRNeM5pHqH9F4RnB2OcSIEBh4Uf2Sq+e57Lk235ajBeF113mmaExvqj1UI2t8l7lfAh8ELsWRDd3qYK8KxNvI/NtE/VBUTRXwmQQ9xMbLT2F4w73aruVyCDVuY8x6exmg8DDK2gtlr3cdTYah0WBp3mYtc/wpbIzxcEXulEXypghMMMxjZRxXRl3s9UVE//Yaco6z55ZfbGtx+ZJwlYh1V09xysypHa+tmfQyXO3zpJR+zdlmf9xBNhd6bbeqMBjPJ9dSxTRoQDzSJA5ABUgLO2n9ONv2+Qcopw7fH33GVpTDM6bfa2TvK1OzVxjexvn+TMvrOp1emYlMkPP3ER923bsjSrvltJS6zrnPHw3nEwX9a8HXSaG6KzIe0LOCf/vaiRMPw/u3niEoF3ccr+1tVcEZJ0EPc4t14CnplW9/7IbGQDRZmKXEuCW2VmnCWiT7GGBmAGXlk/WV6HS0UzQ== 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: >> There will be some clash with [1], but nothing that cannot be sorted out >> easily by moving the functions added to kernel/fork.c to wherever the vma >> bits will live. >> >> Briefly tested with some basic /dev/mem test I crafted. I want to convert >> them to selftests, but that might or might not require a bit of >> more work (e.g., /dev/mem accessibility). > > So for the x86 bits, once it passes review by the fine MM folks: > > Acked-by: Ingo Molnar > Thanks! > And I suppose this rewrite will be carried in -mm? Yes, will make conflicts with Lorenzo's work easier to resolve (in whatever order this ends up going in). I suspect there are not many PAT related things on the horizon. -- Cheers, David / dhildenb