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b=XclZTENhz4WuwaHYEbQt4QCMy8qz6n8allqXp109CpNeGNQuRxbrm2KAesDgES/Gm HU8Qmct9zfEMFub3+Rc9FHj8GhivKIbgCpzmRKiLvOGbsTHTNOcDq6g2J9iCVolevJ iyowr83xc3X2mSv0NU3ksdaUJE1UfPwjAKXy2q8YU8mtrW2ujRFrL4r9epR28CTVZ9 b7fDFWpRQLqqQriqnckobQ04hyOQs9j4R3Nrl7MOJipq8Jq5hb7HzhBQMKxGT8GfOO oIM0AfINe6xqwdqpbbx8l1E422TJwoW0FwuIUPB0uv/CDbqWIewiJM9+LlB4vKzf39 TUy5KR9OXVhPw== Message-ID: <41da530d-c3fb-471a-90ba-ab4d9b58829f@kernel.org> Date: Wed, 19 Aug 2026 09:57:05 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH 01/57] mm: add pte_folio() To: Rik van Riel , Kiryl Shutsemau , akpm@linux-foundation.org, ljs@kernel.org, nico.pache@linux.dev Cc: baolin.wang@linux.alibaba.com, baohua@kernel.org, dev.jain@arm.com, hughd@google.com, lance.yang@linux.dev, liam@infradead.org, mhocko@suse.com, rppt@kernel.org, ryan.roberts@arm.com, shuah@kernel.org, surenb@google.com, usama.arif@linux.dev, vbabka@kernel.org, ziy@nvidia.com, usama.anjum@arm.com, agordeev@linux.ibm.com, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, kas@kernel.org, jannh@google.com, willy@infradead.org, pfalcato@suse.de, rostedt@goodmis.org, mhiramat@kernel.org, linux-trace-kernel@vger.kernel.org, bpf@vger.kernel.org References: <20260816224609.308019-1-kirill@shutemov.name> <20260816224609.308019-2-kirill@shutemov.name> <905d08d102e56a026a5ad69573c507d2d9becc37.camel@surriel.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Stat-Signature: 7s59xpz93muujf51u6pm8pbzdmnp7ybc X-Rspamd-Queue-Id: 4F6CF40005 X-Rspam-User: X-Rspamd-Server: rspam12 X-HE-Tag: 1787126243-488008 X-HE-Meta: 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 Lb7UBn58 YYdqwY0OimjrjIdb2bTzC8GMCcouqSuA4ERcidflB/oEYIhu2EFC5wxAcbS/S/+s9mIgEOVv6rk5xhto+4IwUxyUmtFJ/EFgqU6KCnxKumiw16Rbk6BB8VoBkrxnaE+DZ/29FxL9rgJ1POU2ayNRIR3uyXKbt1ox6MrXKduQExTZbEaM5SdUywhkKGjDSBP9/gCBul1Yg9EKIEPRIs2+axy6K/hSx4yu5rMGRQOVC+J4abIH/cDaD1POTFKhH1CHadkP8/JZXMn/nRf4Vu42fj8dbbGS8bP8qpS3L++7/CBdpOqZdqdAWlR1UMg== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 8/18/26 22:04, Rik van Riel wrote: > On Tue, 2026-08-18 at 20:13 +0200, David Hildenbrand (Arm) wrote: >> On 8/18/26 18:38, Rik van Riel wrote: >>> >>> Oh nice, this could clean up some things in the >>> get_user_pages code too, when we get around to >>> tech debt there. >> >> We really need the page in GUP code ... > > Ugh, indeed. COW can create "holes" in the middle of > a large folio, so even __access_remote_vm() will > continue to need pages. > > I guess we'll continue to look up both page and > folio in that code, then :/ > Yeah, and it will be more fun once we decouple pages from folios, because then a page_folio() will be allowed to fail. (more GUP work, including in GUP users, is required to support that) -- Cheers, David