Re: [PATCH v3 29/30] luo: allow preserving memfd

On Wed, Sep 03, 2025 at 03:59:40PM +0000, Pasha Tatashin wrote:

quoted

And again in real systems we expect memfd to be fully populated too.

I thought so too, but we already have a use case for slightly sparse
memfd, unfortunately, that becomes *very* inefficient when fully
populated.

Wait, regardless of how sparse memfd is, once you memfd_pin_folios() the
number of folios to preserve is known and the metadata to preserve is a
fully populated array.

-- 
Sincerely yours,
Mike.