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[2003:cb:c715:8600:f05d:97b6:fb98:2bc1]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-36790a40391sm5525277f8f.54.2024.07.04.12.03.21 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 04 Jul 2024 12:03:22 -0700 (PDT) Message-ID: <27beaa0e-697e-4e30-9ac6-5de22228aec1@redhat.com> Date: Thu, 4 Jul 2024 21:03:21 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 0/6] add mTHP support for anonymous shmem 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: 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-Stat-Signature: rusunfnwjdu6ufjn8btfr71tu4o4yx4b X-Rspamd-Queue-Id: A9A0D4000F X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1720119806-327427 X-HE-Meta: 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 7xVyDJyV 9w90wnFW0QF7+TX5NQiaCNZpwOuQS41YBTsaP/Ohkk0BZA32qQPNhKuMo7J0ZzDE6c5+lh8HC5Lmkm7h9jOzjb3ztSQtbPsU7AecUZam23AcM19UdfzY2a+W27tcvDNGkFxYVU1ksmkvGzhZDKhjcvT9cCUkOAL2vjg/kP8fRi4jGNh+m7AsP93PZffQxZQO9G1rmUbH+gbibcCi1od/jaW0DCNLPcBAJyCPuVUmkg9NgyeWH1eTmJ7SUMxENxLYwv9T+qYklz/+4LUYDV6748IqttwXX/5QfJLHqWUxsxNbJszW5APZPeoiUEFOAeim76pYk0vmCzGOCCS5gRuBPlNtldv0KMnMSyWRCFAuncU55ZJaa42DM8r150A== 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: > 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. -- Cheers, David / dhildenb