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[2003:cb:c715:8600:f05d:97b6:fb98:2bc1]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4264a2519b6sm34479535e9.33.2024.07.04.12.19.10 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 04 Jul 2024 12:19:11 -0700 (PDT) Message-ID: <6d4c0191-18a9-4c8f-8814-d4775557383e@redhat.com> Date: Thu, 4 Jul 2024 21:19:10 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 0/6] add mTHP support for anonymous shmem From: David Hildenbrand To: Matthew Wilcox , Baolin Wang Cc: akpm@linux-foundation.org, hughd@google.com, wangkefeng.wang@huawei.com, ying.huang@intel.com, 21cnbao@gmail.com, ryan.roberts@arm.com, shy828301@gmail.com, ziy@nvidia.com, ioworker0@gmail.com, da.gomez@samsung.com, p.raghav@samsung.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <27beaa0e-697e-4e30-9ac6-5de22228aec1@redhat.com> 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: <27beaa0e-697e-4e30-9ac6-5de22228aec1@redhat.com> 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-Stat-Signature: 3qgm9sz5d1rwjry38d1fo1rd8izd8wr1 X-Rspam-User: X-Rspamd-Queue-Id: 57660C0011 X-Rspamd-Server: rspam02 X-HE-Tag: 1720120755-198057 X-HE-Meta: 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 lmPesX3c tJn6HXiQi7NmZKVRvydwv+1Bcgk3ie8BSAWyALii8e8shv3IKh6UfY7j7a1U9px4yIFw/7P7ecDKqjLBJNYmf6azVKNO6hFebJ/WmzYjYM7Wtu43I+XMN40kDWp6Nnk88u5AUIDZxJtjbhljpGS2cSxOzzNJ+eLGGEi9AC/IiWUgb66cc99sPoxX9j6ZExA9zkTkaDiUsGDyrmhXvAusUXJnOlXEa42be8OPYob6BoCYYO9n8UKnNtLsLMTzjpnb5fYCDAc61mOeoR4O8Pn3rM+xjSwPPDMOBDBGB4w7Ie2AD81me7WRNscQrflzkvt6bnxqwTiDjn7BAcyDupwZR09y4M8EZii1ZwWcK7+5HdnJkveS8Ar3wOle9BhV8GDwLb80uSulTJOV4j6hX4GoZ/LHxG7lmII5VUuKbHn9+kgXXLER1ZFHmWn6e8GAkHcIszllDjMohGFpC6cc= 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 04.07.24 21:03, David Hildenbrand wrote: >> shmem has two uses: >> >> - MAP_ANONYMOUS | MAP_SHARED (this patch set) >> - tmpfs >> >> For the second use case we don't want controls *at all*, we want the >> same heiristics used for all other filesystems to apply to tmpfs. > > As discussed in the MM meeting, Hugh had a different opinion on that. FWIW, I just recalled that I wrote a quick summary: https://lkml.kernel.org/r/f1783ff0-65bd-4b2b-8952-52b6822a0835@redhat.com I believe the meetings are recorded as well, but never looked at recordings. -- Cheers, David / dhildenb