Re: [PATCH v5 08/17] mm/sparse-vmemmap: support section-based vmemmap optimization

[Qi Zheng]

On 8/25/26 4:45 PM, Muchun Song wrote:
> Teach sparse-vmemmap population code to use the compound page order
> when deciding whether a vmemmap page can be optimized.
>
> With this information, the common sparse-vmemmap population path can
> allocate or reuse shared tail vmemmap pages directly instead of relying
> on HugeTLB-specific handling.
>
> This centralizes vmemmap optimization logic in the sparse-vmemmap code,
> based on section metadata, and prepares for sharing the same mechanism
> across different users of vmemmap optimization, including HugeTLB and
> DAX.
>
> Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>

Acked-by: Qi Zheng <qi.zheng@xxxxxxxxx>

Thanks,
Qi