On 17.12.24 06:13, Alistair Popple wrote:
Longterm pinning of FS DAX pages should already be disallowed by various pXX_devmap checks. However a future change will cause these checks to be invalid for FS DAX pages so make folio_is_longterm_pinnable() return false for FS DAX pages.
Nit: I'd consistently use "mm/gup:" as prefix for GUP-related patches. (similarly, mm/huge_memory and mm/rmap in the other patches)
Signed-off-by: Alistair Popple <apop...@nvidia.com> Reviewed-by: John Hubbard <jhubb...@nvidia.com> --- include/linux/mm.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/linux/mm.h b/include/linux/mm.h index f267b06..01edca9 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2078,6 +2078,10 @@ static inline bool folio_is_longterm_pinnable(struct folio *folio) if (folio_is_device_coherent(folio)) return false;+ /* DAX must also always allow eviction. */+ if (folio_is_fsdax(folio)) + return false; + /* Otherwise, non-movable zone folios can be pinned. */ return !folio_is_zone_movable(folio);
Acked-by: David Hildenbrand <da...@redhat.com> -- Cheers, David / dhildenb
