Re: [RFC PATCH 01/57] mm: add pte_folio()
From: Rik van Riel <riel@surriel.com>
Date: 2026-08-18 20:10:45
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bpf, linux-kselftest, linux-mm, lkml
On Tue, 2026-08-18 at 20:13 +0200, David Hildenbrand (Arm) wrote:
On 8/18/26 18:38, Rik van Riel wrote:quoted
On Sun, 2026-08-16 at 23:45 +0100, Kiryl Shutsemau wrote:quoted
From: "Kiryl Shutsemau (Meta)" <kas@kernel.org> Callers that want the folio behind a present PTE spell it out as page_folio(pte_page(pte)). Add pte_folio() as the folio companion to pte_page(), and convert the callers in fs/proc/task_mmu.c and mm/hugetlb.c. Preparation for the anonymous collapse engine, which reads the folio behind a PTE in several places. Assisted-by: Claude-Code:claude-opus-5 Signed-off-by: Kiryl Shutsemau (Meta) <kas@kernel.org>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 :/ -- All Rights Reversed.