Docs/ABI/damon: document addr_unit file

Document addr_unit DAMON sysfs file on DAMON ABI document.

Link: https://lkml.kernel.org/r/20250828171242.59810-11-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Quanmin Yan <yanquanmin1@huawei.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: ze zuo <zuoze1@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/Documentation/ABI/testing/sysfs-kernel-mm-damon b/Documentation/ABI/testing/sysfs-kernel-mm-damon
index 6791d879759ea8a4e35c7047ba37098dcc3b9cbc..b6b71db36ca72ef4a0f1438d185a2389e2ed2c8d 100644 (file)
--- a/Documentation/ABI/testing/sysfs-kernel-mm-damon
+++ b/Documentation/ABI/testing/sysfs-kernel-mm-damon
@@ -77,6 +77,13 @@ Description: Writing a keyword for a monitoring operations set ('vaddr' for
                Note that only the operations sets that listed in
                'avail_operations' file are valid inputs.
 
+What:          /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/addr_unit
+Date:          Aug 2025
+Contact:       SeongJae Park <sj@kernel.org>
+Description:   Writing an integer to this file sets the 'address unit'
+               parameter of the given operations set of the context.  Reading
+               the file returns the last-written 'address unit' value.
+
 What:          /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/monitoring_attrs/intervals/sample_us
 Date:          Mar 2022
 Contact:       SeongJae Park <sj@kernel.org>