linux-kernel - [PATCH v5 8/8] Docs/.../mm/damon: add more damos actions

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Date: Thu, 13 Jun 2024 22:20:55 +0900
From: Honggyu Kim <honggyu.kim@...com>
To: SeongJae Park <sj@...nel.org>,
	damon@...ts.linux.dev
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Gregory Price <gregory.price@...verge.com>,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org,
	42.hyeyoo@...il.com,
	art.jeongseob@...il.com,
	kernel_team@...ynix.com,
	Honggyu Kim <honggyu.kim@...com>
Subject: [PATCH v5 8/8] Docs/.../mm/damon: add more damos actions

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@...com>
---
 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``
 
 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.
 
-- 
2.34.1