Re: [RFC, PATCH 00/12] userfaultfd: working set tracking for VM guest memory

Kiryl Shutsemau
2026-04-17T11:02:08Z

On Thu, Apr 16, 2026 at 09:25:25PM +0100, Kiryl Shutsemau wrote:
> > b) obviously means that we cannot use uffd-wp and uffd-rwp at the same
> > time in the same uffd area. I guess that should be acceptable for the
> > use cases we you should have in mind?
>
> I took a different path: I still use PROT_NONE PTEs, so it cannot
> co-exist with NUMA balancing [fully], but WP + RWP should be fine. I
> need to add a test for this.

WP + RWP works. Test case added.

--
Kiryl Shutsemau / Kirill A. Shutemov