Re: [PATCH 07/12] mm: hugetlb_vmemmap: simplify shared tail page handling

[Qi Zheng]

On 10/20/26 7:58 PM, Muchun Song wrote:
> The remap walker currently carries a shared tail page selected by its
> caller, even though the optimize and restore callbacks can derive the
> same information from the folio being processed.  This adds redundant
> state to the walker and couples its interface to caller-side preparation.
>
> Derive the shared mapping state in the callbacks instead, keeping the
> mapping policy with the PTE being processed and simplifying the remap
> interface.
>
> No functional change intended.
>
> Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
> ---
>   include/linux/vmemmap-optimization.h |  6 +-
>   mm/hugetlb_vmemmap.c                 | 89 ++++++++++++----------------
>   mm/mm_init.c                         |  6 +-
>   mm/sparse-vmemmap.c                  |  5 +-
>   4 files changed, 49 insertions(+), 57 deletions(-)

LGTM, so:

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

Thanks,
Qi