The patch titled
Subject: Docs/damon: document damos_migrate_{hot,cold}
has been added to the -mm mm-unstable branch. Its filename is
docs-damon-document-damos_migrate_hotcold.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/docs-damon-document-damos_migrate_hotcold.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Honggyu Kim <honggyu.kim@xxxxxx>
Subject: Docs/damon: document damos_migrate_{hot,cold}
Date: Fri, 14 Jun 2024 12:00:09 +0900
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.
Link: https://lkml.kernel.org/r/20240614030010.751-8-honggyu.kim@xxxxxx
Signed-off-by: Honggyu Kim <honggyu.kim@xxxxxx>
Reviewed-by: SeongJae Park <sj@xxxxxxxxxx>
Cc: Gregory Price <gregory.price@xxxxxxxxxxxx>
Cc: Hyeonggon Yoo <42.hyeyoo@xxxxxxxxx>
Cc: Hyeongtak Ji <hyeongtak.ji@xxxxxx>
Cc: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
Cc: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
Cc: Rakie Kim <rakie.kim@xxxxxx>
Cc: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/admin-guide/mm/damon/usage.rst | 4 ++++
Documentation/mm/damon/design.rst | 4 ++++
2 files changed, 8 insertions(+)
--- a/Documentation/admin-guide/mm/damon/usage.rst~docs-damon-document-damos_migrate_hotcold
+++ a/Documentation/admin-guide/mm/damon/usage.rst
@@ -300,6 +300,10 @@ from the file and their meaning are same
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/
--- a/Documentation/mm/damon/design.rst~docs-damon-document-damos_migrate_hotcold
+++ a/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.
_
Patches currently in -mm which might be from honggyu.kim@xxxxxx are
mm-make-alloc_demote_folio-externally-invokable-for-migration.patch
mm-rename-alloc_demote_folio-to-alloc_migrate_folio.patch
mm-migrate-add-mr_damon-to-migrate_reason.patch
mm-damon-paddr-introduce-damos_migrate_cold-action-for-demotion.patch
docs-damon-document-damos_migrate_hotcold.patch
