Re: [RFC 1/3] mm/memory.c: introduce vm_insert_page(s)_mkspecial

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hi,

I relaly don't think we should add this amount of overhead to the
core VM for a (relatively) irrelevant driver.
OK, but as what I have described in cover letter, both vm_insert_pages and
remap_pfn_range have performance or usage limits. Do you know any better
method to map block device io request's sgl pages to user space? I think block device backend implemented in use space will benefit from this feature, thanks.

Regards,
Xiaoguang Wang



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