Re: [RFC 1/4] mm: export zap_page_range() for driver use

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On Mon, Oct 19, 2020 at 10:56:20PM +0800, Xie Yongji wrote:
> Export zap_page_range() for use in VDUSE.

I think you're missing a lot of MMU notifier work by calling this
directly.  It probably works in every scenario you've tested, but won't
work for others.  I see you're using VM_MIXEDMAP -- would it make sense
to use VM_PFNMAP instead and use zap_vma_ptes()?  Or would it make sense
to change zap_vma_ptes() to handle VM_MIXEDMAP as well as VM_PFNMAP?





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