Re: [PATCH] mm/damon: align MMU notifier range when clearing PMD young bit

[Aveline Noir]

Hi SJ,

On Thu, 22 Oct 2026 17:20:17 -0700 SJ Park <sj@xxxxxxxxxx> wrote:
> I Cc-ed them.  Please Cc all
> recipients who get_maitnainer.pl is recommending, from the next time.

Sorry for that. Maybe I will use b4 next time :)

> However, I think this patch explains its context very well, and therefore
> this link is not needed.

Sure , That make sense.

> Were you also able to confirm the expected wrong behavior (missing part
> of the sampled huge page and age secondary mapping), too?

Yes. A test with nested x86-64 KVM confirmed both effects. With
4 KiB EPT mappings, a midpoint PMD sample left the first 1 MiB young and
aged the next THP's first 1 MiB. With 2 MiB EPT mappings, both whole THPs
were aged. After the fix, only the sampled THP was aged in both cases.

Thanks,
Aveline Noir