25 Nov
2025
25 Nov
'25
2:29 p.m.
On Mon, Nov 24, 2025 at 12:03:17PM +0100, David Hildenbrand (Red Hat) wrote:
On 11/23/25 11:27, Mike Rapoport wrote:
From: "Mike Rapoport (Microsoft)" rppt@kernel.org
When userspace resolves a page fault in a shmem VMA with UFFDIO_CONTINUE it needs to get a folio that already exists in the pagecache backing that VMA.
Instead of using shmem_get_folio() for that, add a get_pagecache_folio()
get_shared_folio()
Given that the helper now no longer receives a VMA, I assume we can just really call it get_folio() and the "shared" part would be implicit. (from the inode)
It makes naming shmem_vm_ops.get_folio harder, because we already have shmem_get_folio :) I'll think of something.
-- Cheers David
--
Sincerely yours,
Mike.