# Re: \[PATCH v3 00/14\] mm, sparse-vmemmap: Introduce compound pagemaps

- From: Dan Williams \<hidden\>
- Date: 2021-07-27 23:23:32 
- List: linux-mm
- Page: https://ratatoskr.run/linux-mm/2021/07/6510109
- Thread: https://ratatoskr.run/linux-mm/2021/07/6509813/t.md

```text
On Thu, Jul 22, 2021 at 3:54 AM Joao Martins [ref] wrote:
[..]
> > The folio work really touches the page
> > cache for now, and this seems mostly to touch the devmap paths.
> >
> /me nods -- it really is about devmap infra for usage in device-dax for persistent memory.
>
> Perhaps I should do s/pagemaps/devmap/ throughout the series to avoid confusion.

I also like "devmap" as a more accurate name. It matches the PFN_DEV
and PFN_MAP flags that decorate DAX capable pfn_t instances. It also
happens to match a recommendation I gave to Ira for his support for
supervisor protection keys with devmap pfns.

```