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

Peter Xu
2026-04-23T14:50:12Z

Hello, Kiryl,

On Thu, Apr 23, 2026 at 03:27:11PM +0100, Kiryl Shutsemau wrote:
> The patchet is pretty good shape in my eyes and will probably drop RFC
> tag.

I still have some high level questions not yet got answered. Do you want
to answer them?

https://lore.kernel.org/all/ad59TxAHNwFWH7Cc@x1.local/

In summary, it's about:

- Whether we have explored other approaches on page hotness tracking

- Whether read protection is required for an userspace swap system
(e.g. did you get time to have a look at umap?)

Thanks,

--
Peter Xu