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

Pratyush Yadav
2025-11-14T19:33:21Z

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@soleen.com>
> Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>

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

[...]

--
Regards,
Pratyush Yadav