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(p200300d82f0df000eec92b8d4913f32a.dip0.t-ipconnect.de. [2003:d8:2f0d:f000:eec9:2b8d:4913:f32a]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-450d7fa2333sm173757825e9.11.2025.06.03.14.36.28 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 03 Jun 2025 14:36:30 -0700 (PDT) Message-ID: Date: Tue, 3 Jun 2025 23:36:28 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 0/2] mm/huge_memory: don't mark refcounted pages special in vmf_insert_folio_*() To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, nvdimm@lists.linux.dev, linux-cxl@vger.kernel.org, Andrew Morton , Alistair Popple , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Zi Yan , Baolin Wang , Nico Pache , Ryan Roberts , Dev Jain , Dan Williams References: <20250603211634.2925015-1-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: <20250603211634.2925015-1-david@redhat.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: 8wEXpp8DtoH6l1tpv-fXUj9X9EE11gEPdDdpER6LqLc_1748986592 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: rspam10 X-Rspamd-Queue-Id: 7A7491C0005 X-Stat-Signature: 4gpktoew9bdm5bedbenpauebexjfxe8c X-Rspam-User: X-HE-Tag: 1748986596-131300 X-HE-Meta: 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 zipbfGgo CzKNIE7Jl1Hro7ygU90zxxOpwbCbUJi0By4UlUAlHKCd8ZaA75GOqwo5y6Jar+YYI335sj+rDJIGerXtLpDTHZlAXSgyTblXSUnLDl9WA5RfTcShGb55XO9ePrvcT3AkFh5Hl9pNnc4vkdD2LOJ9gWhu4ToVjCydrbyvpSJvPWPpj6HXSp7KR8ZNJsDX6eFnTDZ12ZPb0H3vfock7x+Q2VlEbnxtBa/SSli/huDIbJs8kGQZDUc5id8D+arC81m67ivlNudYEJeOabFhrGzKRDXaKL7jM8nPePdTAoRNgUUxAViPOdAgGALp1mSgj4virER+hUv3dKkhiF7cFWPAbelo2PjPrGsr0yLnRIA8rMI2JW1BHKXh0oAyRYyC5zWQL2LCu41B0OJ2BcvxADseSdbznGRolKqCTrFJwnlDYo/q5G0DaOtU+l7/q+dPnpU7Bmm/PM9Y5181PBP8= 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 03.06.25 23:16, David Hildenbrand wrote: > Based on Linus' master. > > While working on improving vm_normal_page() and friends, I stumbled > over this issues: refcounted "normal" pages must not be marked > using pmd_special() / pud_special(). > > Fortunately, so far there doesn't seem to be serious damage. > > This is only compile-tested so far. Still looking for an easy way to test > PMD/PUD mappings with DAX. Any tests I can easily run? ... aaaand I should have waited for the cross compiles. s390x and loongarch are not happy about pud_mkhuge() and pfn_pud(). Need to fence folio_mk_pud() by CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD. -- Cheers, David / dhildenb