[PATCH v2 03/13] kho: Introduce high-level memory allocation API

[Pratyush Yadav]

On Fri, Nov 14 2025, Pasha Tatashin wrote:

> Currently, clients of KHO must manually allocate memory (e.g., via
> alloc_pages), calculate the page order, and explicitly call
> kho_preserve_folio(). Similarly, cleanup requires separate calls to
> unpreserve and free the memory.
>
> Introduce a high-level API to streamline this common pattern:
>
> - kho_alloc_preserve(size): Allocates physically contiguous, zeroed
>   memory and immediately marks it for preservation.
> - kho_unpreserve_free(ptr): Unpreserves and frees the memory
>   in the current kernel.
> - kho_restore_free(ptr): Restores the struct page state of
>   preserved memory in the new kernel and immediately frees it to the
>   page allocator.
>
> Signed-off-by: Pasha Tatashin <pasha.tatashin at soleen.com>
> Reviewed-by: Mike Rapoport (Microsoft) <rppt at kernel.org>

Reviewed-by: Pratyush Yadav <pratyush at kernel.org>

[...]

-- 
Regards,
Pratyush Yadav