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@kernel.org>
Signed-off-by: Muchun Song <redacted>

Reviewed-by: Oscar Salvador (SUSE) <osalvador@suse.de>

 

-- 
Oscar Salvador
SUSE Labs