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(p200300cbc7062000e44cbc46d8d30be5.dip0.t-ipconnect.de. [2003:cb:c706:2000:e44c:bc46:d8d3:be5]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4399558f8d1sm69276755e9.19.2025.02.20.01.46.52 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 20 Feb 2025 01:46:55 -0800 (PST) Message-ID: Date: Thu, 20 Feb 2025 10:46:52 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/4] mm: hugetlb: Add huge page size param to huge_ptep_get_and_clear() To: Ryan Roberts , Catalin Marinas , Will Deacon , Huacai Chen , WANG Xuerui , Thomas Bogendoerfer , "James E.J. Bottomley" , Helge Deller , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Naveen N Rao , Paul Walmsley , Palmer Dabbelt , Albert Ou , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Gerald Schaefer , "David S. Miller" , Andreas Larsson , Arnd Bergmann , Muchun Song , Andrew Morton , Uladzislau Rezki , Christoph Hellwig , "Matthew Wilcox (Oracle)" , Mark Rutland , Anshuman Khandual , Dev Jain , Kevin Brodsky , Alexandre Ghiti Cc: linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org References: <20250217140419.1702389-1-ryan.roberts@arm.com> <20250217140419.1702389-2-ryan.roberts@arm.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: <20250217140419.1702389-2-ryan.roberts@arm.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: vZ4Yac-3jZfk4o_lzBK5lc6kKcRXs_mzNQEsqB2bums_1740044816 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: 11495A0009 X-Stat-Signature: defupdc3o3j1wjkwpz6d5mxz1meyizjg X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1740044818-429839 X-HE-Meta: U2FsdGVkX1+RDE2PsO8b0AT5skj1TUCPAggMwoRrfRhbTFOidsAtodq+RHoJblKakWYcqSucuOMopJcRh4t/1E9M6Yzoelqkeakx2JLlTWDDEW0PMMFVy1C9GhaCkUHMElTACpN47s4SfQFsmxld0re1GvQoNHz6nhnnZRybj5RcmLaboQBh00X87IsJ6A6ZDySW43AhBZfdhKEc3hambDDyyV7uxNL2HJo19Ltql7M0Wjr4BN3SzNahOygGfXBfmJonFH1Au4uU54w1qct9G1mCO6gJvrUH93EpZKJrkMuuNq9r++WeQA9NW9dzWeGne17/ZQ2/4L0dWywAom1CedfzKI693kKlL9J4vEMDuLL+/r7AwYvHeYCLkg0K0cToJgSA1Ak/g71hMTHZ9HMogZTNwLe2Cz45+meyAgnbskfsTBuVsK1w9aA/lip/adZ1VEC/idljE8dap0SNkpAXxkbnAzMx2Ms0tdwWXcEznl/2pbcJfBvOAwX/Ag1JFKKttdH4r+sy49+NcunQVM9wOrficTAYW5zRp4wfPYMkQeZi/v7wTbjpbXLahMds4v3JGowjxBy8yIvRatiVdUlaGHWILHbJl/7YSY/bIX8qHvI2hye6r27bdFz3ke80GcIWqV6YCxawAnEYbbBIAcXEmVh08FCEHDABrV53Fe5joesIJRPUNrbVn3sNflumWOcGqb65kwyRi8a6vpJ0PC/o5bflG/D6K/yoy4yFZ2kwpdoWbVEs3pVYG2RD+Xworw1pUKiKh0/tnHwl89ayh8V0PA7R/ZbBtjL65BqseMUrhljx9KrxGd86DcWa0G/J0uDroAeuuru6IihLxYi96NXHFkyKP3gYFv9NnKsdwrn21xRaWJ0aPoyD/e0M0y3mFf/A1YYpfsBiKhw3DnMVkUU+2XWfRBYqqw3c9j8RqButKiphUhoTMtEoWBbNMLI8j4im1L6cAT70nKxyCIwxnol h8naLMKi 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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 17.02.25 15:04, Ryan Roberts wrote: > In order to fix a bug, arm64 needs to be told the size of the huge page > for which the huge_pte is being set in huge_ptep_get_and_clear(). s/set/cleared/ ? > Provide for this by adding an `unsigned long sz` parameter to the > function. This follows the same pattern as huge_pte_clear() and > set_huge_pte_at(). > > This commit makes the required interface modifications to the core mm as > well as all arches that implement this function (arm64, loongarch, mips, > parisc, powerpc, riscv, s390, sparc). The actual arm64 bug will be fixed > in a separate commit. > > Cc: stable@vger.kernel.org > Fixes: 66b3923a1a0f ("arm64: hugetlb: add support for PTE contiguous bit") > Signed-off-by: Ryan Roberts > --- Acked-by: David Hildenbrand -- Cheers, David / dhildenb