Re: [RFC PATCH v2 3/4] mm/damon: introduce DAMON_HUGEPAGE for hot region hugepage collapsing

[SeongJae Park <sj@kernel.org>]

On Fri, 22 May 2026 14:55:17 +0000 <gutierrez.asier@huawei-partners.com> wrote:

> From: Asier Gutierrez <gutierrez.asier@huawei-partners.com>
> 
> This patch introduces a new DAMON module (DAMON_HUGEPAGE) which
> collapses hot regions into huge pages.
> 
> DAMON_HUGEPAGE operates in the virtual memory space, for a specific
> task. The user is expected to supply the PID of the task that is going
> to be monitored through the monitored_pid module variable.
> 
> DAMON_HUGEPAGE uses the hugepage auto-tune mechanism to increase or
> decrease the aggressiveness of page collapsing. User autotuning is
> also available for additional tuning aggressiveness control.
> 
> The module also includes changes to the DAMON compilation, so that the
> module can be enabled or disabled.
> 
> Signed-off-by: Asier Gutierrez <gutierrez.asier@huawei-partners.com>
> ---
>  mm/damon/Kconfig          |   7 +
>  mm/damon/Makefile         |   1 +
>  mm/damon/hugepage.c (new) | 343 ++++++++++++++++++++++++++++++++++++++

If there is no clear use case of this module and this is only for a
demonstration, I'd suggest to make this as a simpler sample module.


Thanks,
SJ

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