Re: [PATCH mm-unstable v19 10/14] mm/khugepaged: introduce collapse_possible_orders helper functions

[Lance Yang]

On Fri, Jun 05, 2026 at 10:14:17AM -0600, Nico Pache wrote:
>Add collapse_possible_orders() to generalize THP order eligibility. The
>function determines which THP orders are permitted based on collapse
>context (khugepaged vs madv_collapse). We also add collapse_possible()
>as a thin wrapper around collapse_possible_orders() that returns a bool
>rather than the whole bitmap.
>
>This consolidates collapse configuration logic and provides a clean
>interface for future mTHP collapse support where the orders may be
>different.
>
>Acked-by: David Hildenbrand (Arm) <david@xxxxxxxxxx>
>Reviewed-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
>Signed-off-by: Nico Pache <npache@xxxxxxxxxx>
>---

Reviewed-by: Lance Yang <lance.yang@xxxxxxxxx>