[RFC PATCH 11/11] Docs/ABI/damon: document scheme filters files

SeongJae Park
2022-11-24T21:21:54Z

Document newly added DAMON sysfs interface files for DAMOS filtering on
the DAMON ABI document.

Signed-off-by: SeongJae Park <sj@kernel.org>
---
.../ABI/testing/sysfs-kernel-mm-damon | 29 +++++++++++++++++++
1 file changed, 29 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-kernel-mm-damon b/Documentation/ABI/testing/sysfs-kernel-mm-damon
index 13397b853692..2744f21b5a6b 100644
--- a/Documentation/ABI/testing/sysfs-kernel-mm-damon
+++ b/Documentation/ABI/testing/sysfs-kernel-mm-damon
@@ -258,6 +258,35 @@ Contact: SeongJae Park <sj@kernel.org>
Description: Writing to and reading from this file sets and gets the low
watermark of the scheme in permil.

+What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes//filters/nr_filters
+Date: Dec 2022
+Contact: SeongJae Park <sj@kernel.org>
+Description: Writing a number 'N' to this file creates the number of
+ directories for setting filters of the scheme named '0' to
+ 'N-1' under the filters/ directory.
+
+What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes//filters/<F>/type
+Date: Dec 2022
+Contact: SeongJae Park <sj@kernel.org>
+Description: Writing to and reading from this file sets and gets the type of
+ the memory of the interest. 'anon' for anonymous pages, or
+ 'memcg' for specific memory cgroup can be written and read.
+
+What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes//filters/<F>/memcg_path
+Date: Dec 2022
+Contact: SeongJae Park <sj@kernel.org>
+Description: If 'memcg' is written to the 'type' file, writing to and
+ reading from this file sets and gets the path to the memory
+ cgroup of the interest.
+
+What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes//filters/<F>/matching
+Date: Dec 2022
+Contact: SeongJae Park <sj@kernel.org>
+Description: Writing 'Y' or 'N' to this file sets whether to filter out
+ pages that do or do not match to the 'type' and 'memcg_path',
+ respectively. Filter out means the action of the scheme will
+ not be applied to.
+
What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes//stats/nr_tried
Date: Mar 2022
Contact: SeongJae Park <sj@kernel.org>
--
2.25.1