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V" , Dan Williams , Thomas Gleixner , Hugh Dickins , x86@kernel.org, Nicholas Piggin , Vlastimil Babka , Ingo Molnar , Alex Thorlton References: <20240715192142.3241557-1-peterx@redhat.com> <20240715192142.3241557-3-peterx@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-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 06DFAC0016 X-Stat-Signature: 3x6xfhn1tu48n58zh8yiy19i8ejrsfj9 X-Rspamd-Server: rspam09 X-Rspam-User: X-HE-Tag: 1722949326-749724 X-HE-Meta: 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 eXoVzLdW ZJ1bbsgqdid84LA/9KbJ3PvaZpi/Br+K0P7UhSHJmlXr6kF2olma3Sbs3MHtK69W8N0Swj8RjPxz68AUDW+TAIXymBDewbiMKNYYTR9sGWlJg+qyizhw7bEFtb0Z1tAs5FfPdtNSmgI2+uTG1meAnAbw+Ym0uVHVTlFNk0Gbb/aYKNxPb+lGTiNYiWw9nw0iwDNnA1JpiEPW/aLfiU2d8QhpNyYBTVDkUAf7y14lAR3vUUazj0GoCpBwHN3hkEIT97SaUTfk7HJzDrPilqG59ZLxOtFZ+91q1GSfPAjB4mgl2TqRiddLkarH6aHHGLevfG9Xz77jFXldQMGcBHn0b20unPVUqFrbfGepxVCAg6MbmPJSuauk1bHtyxvO0ltz59X4ZpCoS/9p3DO7feOz8ckp6DX4CID3Ghj2AAE50yqocokc= 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: > Right. > > I don't have a reason to change numa_pte_updates semantics yet so far, but > here there's the problem where numa_huge_pte_updates can be ambiguous when > there is even PUD involved. > > In general, I don't know how I should treat this counter in PUD path even > if NUMA isn't involved in dax yet; it can be soon involved if we move on > with using this same path for hugetlb, or when 1G thp can be possible (with > Yu Zhao's TAO?). We shouldn't bother about it in the PUD path at all I think. Especially as long as NUMA hinting doesn't apply to any of what we would handle on the PUD path :) > > One other thing I can do is I drop this patch, ignore NUMA_HUGE_PTE_UPDATES > in PUD dax processing for now. It'll work for this series, but it'll still > be a problem later. I figured maybe we should simply drop it from now. It probably shouldn't block your other fixes and we should likely discuss that separately. I agree that we should look into dropping that PMD counter completely. -- Cheers, David / dhildenb