Re: [PATCH v2 2/5] mm: introduce external memory hinting API

[Oleksandr Natalenko]

Hello.

On Tue, Jan 21, 2020 at 10:11:13AM -0800, Minchan Kim wrote:
> > > I also think people don't want to give an KSM hint to non-mergeable area.
> > 
> > And how the manager knows which data is mergable?
> 
> Oleksandr, could you say your thought why you need address range based
> API?

It seems I've overlooked an important piece of this submission: one
cannot apply the hint to all the anonymous mapping regardless of address
range. For KSM I'd rather either have a possibility to hint all the
anonymous mappings, or, as it was suggested previously, be able to iterate
over existing mappings using some (fd-based?) API.

-- 
  Best regards,
    Oleksandr Natalenko (post-factum)
    Senior Software Maintenance Engineer