Re: [PATCH v2 12/69] mm/hugetlb_cma: Validate hugetlb CMA range by zone at reserve time

[Oscar Salvador (SUSE)]

On Wed, May 13, 2026 at 09:04:40PM +0800, Muchun Song wrote:
> Hugetlb CMA allocation currently has to cope with CMA areas that span
> multiple zones.
> 
> Validate the reserved CMA range up front in hugetlb_cma_reserve() so
> later hugetlb CMA allocations can assume a zone-consistent area.
> 
> Also drop the pfn_valid() check from cma_validate_zones(). mem_section
> is not fully initialized at this point, so the check can trigger false
> warnings. Keep the sanity check in cma_activate_area() instead.
> 
> Acked-by: Mike Rapoport (Microsoft) <rppt@xxxxxxxxxx>
> Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>

Reviewed-by: Oscar Salvador (SUSE) <osalvador@xxxxxxx>

 

-- 
Oscar Salvador
SUSE Labs