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| author | Honggyu Kim <honggyu.kim@sk.com> | 2024-06-14 12:00:09 +0900 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-07-03 19:30:13 -0700 |
| commit | 83d0d46a80340baa9bf7e6039f3ad5d097c1af77 (patch) | |
| tree | 68f031c8967a46d579f7fc9a6466e8095e447868 | |
| parent | b696722d784fb3610183281d2fd514b0efe97e3b (diff) | |
| download | lwn-83d0d46a80340baa9bf7e6039f3ad5d097c1af77.tar.gz lwn-83d0d46a80340baa9bf7e6039f3ad5d097c1af77.zip | |
Docs/damon: document damos_migrate_{hot,cold}
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.
[sj@kernel.org: trivial fixups for DAMOS_MIGRATE_{HOT,COLD} documentation]
Link: https://lkml.kernel.org/r/20240618213630.84846-2-sj@kernel.org
Link: https://lkml.kernel.org/r/20240614030010.751-8-honggyu.kim@sk.com
Signed-off-by: Honggyu Kim <honggyu.kim@sk.com>
Signed-off-by: SeongJae Park <sj@kernel.org>Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: Gregory Price <gregory.price@memverge.com>
Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: Hyeongtak Ji <hyeongtak.ji@sk.com>
Cc: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | Documentation/admin-guide/mm/damon/usage.rst | 10 | ||||
| -rw-r--r-- | Documentation/mm/damon/design.rst | 4 |
2 files changed, 11 insertions, 3 deletions
diff --git a/Documentation/admin-guide/mm/damon/usage.rst b/Documentation/admin-guide/mm/damon/usage.rst index e58ceb89ea2a..26df6cfa4441 100644 --- a/Documentation/admin-guide/mm/damon/usage.rst +++ b/Documentation/admin-guide/mm/damon/usage.rst @@ -78,7 +78,7 @@ comma (","). │ │ │ │ │ │ │ │ ... │ │ │ │ │ │ ... │ │ │ │ │ :ref:`schemes <sysfs_schemes>`/nr_schemes - │ │ │ │ │ │ :ref:`0 <sysfs_scheme>`/action,apply_interval_us + │ │ │ │ │ │ :ref:`0 <sysfs_scheme>`/action,target_nid,apply_interval_us │ │ │ │ │ │ │ :ref:`access_pattern <sysfs_access_pattern>`/ │ │ │ │ │ │ │ │ sz/min,max │ │ │ │ │ │ │ │ nr_accesses/min,max @@ -289,14 +289,18 @@ schemes/<N>/ ------------ In each scheme directory, five directories (``access_pattern``, ``quotas``, -``watermarks``, ``filters``, ``stats``, and ``tried_regions``) and two files -(``action`` and ``apply_interval``) exist. +``watermarks``, ``filters``, ``stats``, and ``tried_regions``) and three files +(``action``, ``target_nid`` and ``apply_interval``) exist. The ``action`` file is for setting and getting the scheme's :ref:`action <damon_design_damos_action>`. The keywords that can be written to and read from the file and their meaning are same to those of the list on :ref:`design doc <damon_design_damos_action>`. +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``. + The ``apply_interval_us`` file is for setting and getting the scheme's :ref:`apply_interval <damon_design_damos>` in microseconds. 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. |