Re: [RFC PATCH 00/57] mm/collapse: rebuild collapse on migration primitives

On Tue, Aug 18, 2026 at 03:41:40PM +0100, Lorenzo Stoakes (ARM) wrote:
> > Ah, I missed the context in my other reply. Lorenzo already had some patches at
> > some point to split up mm/memory.c into better chunks that will also better help
> > our subcomponent maintenance model.
> 
> Ah yeah I kinda lost those but indeed doing this is a good idea.

Oh, well, I can give it a try from scratch.

> I should try to dig those out again or look again when I have a chance...
> 
> >
> > I think the challenge is how to handle huge_memory.c, because ideally, we'd not
> > have these stupid callbacks into huge_memory.c once we make PMDs just a
> > first-class citizen.
> 
> Yes and another point and I think it's one that Kiryl also gets at is - can we
> _please_ stop pretending huge folios == THP == what the page cache does == page
> special cases like DAX? :)

Yes.  That is also why I want the split by operation rather than by
THP-ness: a PMD case belongs next to the PTE case for the same operation,
not in a file that collects everything huge.

-- 
  Kiryl Shutsemau / Kirill A. Shutemov