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[2003:cb:c739:bb00:201f:378f:5564:caeb]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-428029e32fesm4607205e9.25.2024.07.24.07.13.17 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 24 Jul 2024 07:13:18 -0700 (PDT) Message-ID: Date: Wed, 24 Jul 2024 16:13:17 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 2/3] memory tiering: introduce folio_use_access_time() check To: Zi Yan , Andrew Morton , linux-mm@kvack.org Cc: "Huang, Ying" , Baolin Wang , Kefeng Wang , Lorenzo Stoakes , linux-kernel@vger.kernel.org References: <20240724130115.793641-1-ziy@nvidia.com> <20240724130115.793641-3-ziy@nvidia.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: <20240724130115.793641-3-ziy@nvidia.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-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 98D8140005 X-Stat-Signature: t1oy459j5hozz4cn7udff6qquc6gyrpe X-Rspam-User: X-HE-Tag: 1721830402-724473 X-HE-Meta: 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 EUsW4LHj 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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 24.07.24 15:01, Zi Yan wrote: > If memory tiering mode is on and a folio is not in the top tier memory, > folio's cpupid field is repurposed to store page access time. Instead of > an open coded check, use a function to encapsulate the check. > > Signed-off-by: Zi Yan > Reviewed-by: "Huang, Ying" > Acked-by: David Hildenbrand > --- Yes, that is much clearer, thanks! -- Cheers, David / dhildenb