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([2a09:80c0:192:0:5dac:bf3d:c41:c3e7]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3a892e52c99sm15308587f8f.49.2025.07.02.02.02.22 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 02 Jul 2025 02:02:23 -0700 (PDT) Message-ID: Date: Wed, 2 Jul 2025 11:02:21 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 23/29] mm/page-alloc: remove PageMappingFlags() To: Lorenzo Stoakes Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-doc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, virtualization@lists.linux.dev, linux-fsdevel@vger.kernel.org, Andrew Morton , Jonathan Corbet , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Jerrin Shaji George , Arnd Bergmann , Greg Kroah-Hartman , "Michael S. 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Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , "Matthew Wilcox (Oracle)" , Minchan Kim , Sergey Senozhatsky , Brendan Jackman , Johannes Weiner , Jason Gunthorpe , John Hubbard , Peter Xu , Xu Xin , Chengming Zhou , Miaohe Lin , Naoya Horiguchi , Oscar Salvador , Rik van Riel , Harry Yoo , Qi Zheng , Shakeel Butt References: <20250630130011.330477-1-david@redhat.com> <20250630130011.330477-24-david@redhat.com> <8ff24777-988a-4d1d-be97-e7184abfa998@lucifer.local> 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-MFC-PROC-ID: eim-Y_xlEur_FQB1iJNh_Et5Y8T6p_fCZZp-hmpJG3w_1751446945 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-Server: rspam05 X-Rspamd-Queue-Id: 5EE40C0006 X-Stat-Signature: 384c1hmrowkabmtxz3qow7aj3srjnfce X-HE-Tag: 1751446948-275446 X-HE-Meta: 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 Scs3oy0z 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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 02.07.25 10:49, Lorenzo Stoakes wrote: > On Tue, Jul 01, 2025 at 09:34:41PM +0200, David Hildenbrand wrote: >> On 01.07.25 15:02, Lorenzo Stoakes wrote: >>> On Mon, Jun 30, 2025 at 03:00:04PM +0200, David Hildenbrand wrote: >>>> We can now simply check for PageAnon() and remove PageMappingFlags(). >>>> >>>> ... and while at it, use the folio instead and operate on >>>> folio->mapping. >>> >>> Probably worth mentioning to be super crystal clear that this is because >>> now it's either an anon folio or a KSM folio, both of which set the >>> FOLIO_MAPPING_ANON flag. >> >> "As PageMappingFlags() now only indicates anon (incl. ksm) folios, we can >> now simply check for PageAnon() and remove PageMappingFlags()." > > Sounds good! Though the extremely nitty part of me says 'capitalise KSM' :P Like we do so consistently with vma, pte and all the other acronyms ;) Can do! -- Cheers, David / dhildenb