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[2003:cb:c74f:b800:58e5:8355:5366:573d]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-43b73702bd0sm17232635e9.10.2025.02.27.01.54.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 27 Feb 2025 01:54:16 -0800 (PST) Message-ID: <15fe7b83-0a3c-47e1-9b32-7db7b6a25c19@redhat.com> Date: Thu, 27 Feb 2025 10:54:15 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: CONFIG_PT_RECLAIM To: Johannes Weiner , Qi Zheng Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20250226183013.GB1042@cmpxchg.org> 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: <20250226183013.GB1042@cmpxchg.org> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: SBU3ewHC0qNOsgCrhSHydRmI6htUwvyHah-dnrQMq80_1740650058 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Queue-Id: 190E94001C X-Stat-Signature: w796mu7n37aaubxb15r1mcqxcwh9s37i X-Rspamd-Server: rspam03 X-HE-Tag: 1740650060-157311 X-HE-Meta: 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 Auq+XeJN vhYAJyKB2dAfgBzeWCNk5QboK1bsf62VLT/R5fabpwuaHYhQC+xpiSjBtfjzjub0Q/FXwRtmNJXIwXNUeDELiHq6kHmP8pBkol0be2KHvKxgYprLu5Y+glMHL/IVO1NU/BUG0xg7gVUm9Jn8012ECJ3SQp4va7D4IMbxxh5ou56OhbWQdjyKh+v47k6W0qLbB0VxnX7TXPLuRwmxpx920gM2/baOrgSz1dGPYgemFSdwEtCc86ve0CJgg2Y/bzqLMkSAdOlmc5WAVi3z4kmp3f4iRmREJk7h9ktZWWkl/mlBwrgTqm6loVBXmvd5MIjg7jbCp7a1yfU9qmKdabHRODwbwRswdRrLK+zbzHXyGfar5WYSRB7dUZzm3s6Z9K3ohqrdYuZ6fGAD1BFiAsnVOoRTkwHjc/pMCiUxLPYRYIXwBM+w7sR144uKXXz8Ct8pxvusm4Q31jLMLwismZd3+qsdUqR1IJx1zQ5ix X-Bogosity: Ham, tests=bogofilter, spamicity=0.000001, 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 26.02.25 19:30, Johannes Weiner wrote: > Does PT_RECLAIM need to be configurable by the user? > > Why not always try to free the page tables if the arch supports it? I recall that the reasoning was that it might negatively affect some workloads so we'd be a bit careful first. I'd be happy if we'd just unconditionally enable it. -- Cheers, David / dhildenb