Re: [PATCH 1/4] mm: generalize vmemmap remap architecture support

[Mike Rapoport]

On Thu, Sep 03, 2026 at 08:21:24PM +0800, Muchun Song wrote:
> ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP is named after its first user, but
> the underlying requirement is not HugeTLB-specific. Generic MM only needs
> to know whether an architecture can safely remap populated vmemmap PTEs at
> run time.
> 
> Rename the architecture opt-in to ARCH_SUPPORTS_VMEMMAP_REMAP and make
> HugeTLB vmemmap optimization depend on that generic capability. This also
> prepares for FS-DAX vmemmap optimization, which relies on the same runtime
> remap support.
> 
> Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>

Reviewed-by: Mike Rapoport (Microsoft) <rppt@xxxxxxxxxx>

> ---
>  arch/loongarch/Kconfig | 2 +-
>  arch/riscv/Kconfig     | 2 +-
>  arch/x86/Kconfig       | 2 +-
>  fs/Kconfig             | 2 +-
>  mm/Kconfig             | 6 ++++--
>  5 files changed, 8 insertions(+), 6 deletions(-)

-- 
Sincerely yours,
Mike.