On Mon, 26 Jun 2023, Vishal Moola (Oracle) wrote:

The MM subsystem is trying to shrink struct page. This patchset
introduces a memory descriptor for page table tracking - struct ptdesc.

...

 39 files changed, 686 insertions(+), 455 deletions(-)

I don't see the point of this patchset: to me it is just obfuscation of
the present-day tight relationship between page table and struct page.

Matthew already explained:

The intent is to get ptdescs to be dynamically allocated at some point
in the ~2-3 years out future when we have finished the folio project ...

So in a kindly mood, I'd say that this patchset is ahead of its time.
But I can certainly adapt to it, if everyone else sees some point to it.

Hugh