Re: [PATCH RFC 2/2] mm: add PMD-level huge page support for remap_pfn_range()

[Yin Tirui]

On 9/24/2025 5:50 PM, David Hildenbrand wrote:
> > Introduce pfnmap_max_page_shift parameter to control maximum page
> > size and "nohugepfnmap" boot option to disable huge pfnmap entirely.
>
> Why? If an arch supports it we should just do it. Or what's the reason 
> behind that?
There's no specific reason for this - it was just intended to provide an 
additional option. I'll remove it in the next version.

...
> Are you sure we can just entirely remove this block for ! 
> vma_is_anonymous(vma)?
Thank you for pointing this out!
There is definitely a problem with removing this block entirely for 
non-anonymous VMAs. I've also found some other problems. I'll fix all of 
them in the next version.

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Best regards,
Yin Tirui