Re: [PATCH v2 2/4] mm: gup: allow long-term pins of CMA-allocated HugeTLB folios

[Jose A. Perez de Azpillaga]

On 11/5/26 5:07 AM, Qi Zheng wrote:
> From: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
> 
> Long-term pinning treats explicitly CMA-allocated HugeTLB folios as
> unpinnable, causing unnecessary migration or pinning failures.
> 
> These folios already own their CMA bitmap ranges, and memory blocks
> overlapping CMA areas cannot be offlined. Allow HugeTLB folios with
> HPG_cma to be pinned directly, including in ZONE_MOVABLE.
> 
> Fixes: cf11e85fc08c ("mm: hugetlb: optionally allocate gigantic hugepages using cma")
> Cc: stable@xxxxxxxxxxxxxxx
> Suggested-by: Muchun Song <muchun.song@xxxxxxxxx>
> Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>


LGTM:

Reviewed-by: Jose A. Perez de Azpillaga <azpijr@xxxxxxxxx>

-- 
cheers,
jose a. p-a