Re: [RFC PATCH 1/5] mm: intorduce __GFP_UNMAPPED and unmapped_alloc()

[Kent Overstreet]

On Fri, May 19, 2023 at 07:14:14PM +0300, Mike Rapoport wrote:
> Unfortunately not because we still need to map the pages in the modules
> area which is essentially a subset of vmalloc address space.

Why wouldn't we be doing that once per 2 MB page?

>  
> > If I have time (hah! big if :) I'll see if I can cook up a patchset that
> > combines our two approaches over the weekend.
> 
> Now there is also an interest about unmapped allocations from KVM folks, so
> I might continue pursuing unmapped allocator, probably just without a new
> GFP flag and hooks into page allocator.

Cool - it does seem like a generally valuable capability :)