Re: [RFC PATCH] mm/damon/reclaim: add 'available' memory as an optional watermarks metric

[Liew Rui Yan <aethernet65535@gmail.com>]

On Sat, 27 Jun 2026 15:26:43 -0700 SJ Park <sj@kernel.org> wrote:

> > I will drop this patch. I think controlling DAMOS pause/rusume
> > separately might be better suited for execution in user space (such as
> > controlling‘quota_ms’ and ‘quota_sz’).
> 
> For explicit DAMOS-only pause/resume, you may also be interested in
> max_nr_snapshots [1] feature.

Thank you for the pointer to the 'max_nr_snapshots' feature!

> > 
> > By the way, I sent you an email about three weeks ago (Fri, 5 Jun 2026
> > 20:28:00 +0800) introducing a userspace auto-tuner program I wrote for
> > DAMON_RECLAIM's 'min_age', and asking for your thoughts. I am not sure
> > if it reached you, could you please check? I would really appreciate
> > your feedback on that as well.
> 
> I don't recall that mail.  Did you send that to damon@lists.linux.dev or other
> public mailing lists?  If so, could you share the message id or lore.kernel.org
> link of the mail?  If not, could you please resend?

I hadn't previously sent this to damon@lists.linux.dev or any public
mailing list.

Since I have completely rewritten it (the email) and it focuses on a
standalone userspace program/daemon, I have submitted it as a new
independent RFC thread [1] to avoid biasing this patch's topic.

> [1] https://lkml.kernel.org/r/20251216080128.42991-8-sj@kernel.org

[1] https://lore.kernel.org/damon/20260628085155.20828-1-aethernet65535@gmail.com

Best regards,
Rui Yan