Hi Honggyu,
On Thu, 13 Jun 2024 22:20:55 +0900 Honggyu Kim <honggyu.kim@xxxxxx> wrote:
> This patch adds damon description for "migrate_hot" and "migrate_cold"
> actions for both usage and design documents as long as a new
> "target_nid" knob to set the migration target node.
>
> Signed-off-by: Honggyu Kim <honggyu.kim@xxxxxx>
> ---
> Documentation/admin-guide/mm/damon/usage.rst | 8 +++++++-
> Documentation/mm/damon/design.rst | 4 ++++
> 2 files changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/admin-guide/mm/damon/usage.rst b/Documentation/admin-guide/mm/damon/usage.rst
> index 7bff54963975..84d62d16c9f9 100644
> --- a/Documentation/admin-guide/mm/damon/usage.rst
> +++ b/Documentation/admin-guide/mm/damon/usage.rst
> @@ -300,6 +300,10 @@ from the file and their meaning are same to those of the list on
> The ``apply_interval_us`` file is for setting and getting the scheme's
> :ref:`apply_interval <damon_design_damos>` in microseconds.
>
> +The ``target_nid`` file is for setting the migration target node, which is
> +only meaningful when the ``action`` is either ``migrate_hot`` or
> +``migrate_cold``.
> +
> .. _sysfs_access_pattern:
>
> schemes/<N>/access_pattern/
> @@ -759,7 +763,9 @@ list on :ref:`design doc <damon_design_damos_action>`.
> - 4: ``nohugepage``
> - 5: ``lru_prio``
> - 6: ``lru_deprio``
> - - 7: ``stat``
> + - 7: ``migrate_hot``
> + - 8: ``migrate_cold``
> + - 9: ``stat``
This section is for DAMON debugfs interface. And to my understanding, this
patchset is not adding support of migrate_{hot,cold} DAMOS actions on DAMON
debugfs interface. So I think this part should be removed.
>
> Quota
> ~~~~~
> diff --git a/Documentation/mm/damon/design.rst b/Documentation/mm/damon/design.rst
> index 3df387249937..3f12c884eb3a 100644
> --- a/Documentation/mm/damon/design.rst
> +++ b/Documentation/mm/damon/design.rst
> @@ -325,6 +325,10 @@ that supports each action are as below.
> Supported by ``paddr`` operations set.
> - ``lru_deprio``: Deprioritize the region on its LRU lists.
> Supported by ``paddr`` operations set.
> + - ``migrate_hot``: Migrate the regions prioritizing warmer regions.
> + Supported by ``paddr`` operations set.
> + - ``migrate_cold``: Migrate the regions prioritizing colder regions.
> + Supported by ``paddr`` operations set.
> - ``stat``: Do nothing but count the statistics.
> Supported by all operations sets.
Except the DAMON debugfs interface section, this patch looks good to me.
Thanks,
SJ
[...]
