+ docs-admin-guide-mm-damon-usage-document-probe-preps-sysfs-files.patch added to mm-new branch

+ docs-admin-guide-mm-damon-usage-document-probe-preps-sysfs-files.patch added to mm-new branch

[Andrew Morton]

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The patch titled
     Subject: Docs/admin-guide/mm/damon/usage: document probe preps sysfs files
has been added to the -mm mm-new branch.  Its filename is
     docs-admin-guide-mm-damon-usage-document-probe-preps-sysfs-files.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/docs-admin-guide-mm-damon-usage-document-probe-preps-sysfs-files.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

The mm-new branch of mm.git is not included in linux-next

If a few days of testing in mm-new is successful, the patch will me moved
into mm.git's mm-unstable branch, which is included in linux-next

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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

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------------------------------------------------------
From: SJ Park <sj@kernel.org>
Subject: Docs/admin-guide/mm/damon/usage: document probe preps sysfs files
Date: Tue, 1 Sep 2026 06:25:03 -0700

Update DAMON usage document for the newly added DAMON probe preps sysfs
files.

Link: https://lore.kernel.org/20260901132506.99243-17-sj@kernel.org
Signed-off-by: SJ Park <sj@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 Documentation/admin-guide/mm/damon/usage.rst |   18 ++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

--- a/Documentation/admin-guide/mm/damon/usage.rst~docs-admin-guide-mm-damon-usage-document-probe-preps-sysfs-files
+++ a/Documentation/admin-guide/mm/damon/usage.rst
@@ -74,6 +74,9 @@ comma (",").
     │ │ │ │ │ │ nr_regions/min,max
     │ │ │ │ │ │ :ref:`probes <damon_usage_sysfs_probes>`/nr_probes
     │ │ │ │ │ │ │ 0/weight
+    │ │ │ │ │ │ │ │ preps/nr_preps
+    │ │ │ │ │ │ │ │ │ 0/prep_action
+    │ │ │ │ │ │ │ │ │ ...
     │ │ │ │ │ │ │ │ filters/nr_filters
     │ │ │ │ │ │ │ │ │ 0/type,matching,allow,path
     │ │ │ │ │ │ │ │ │ ...
@@ -283,9 +286,18 @@ In the beginning, this directory has onl
 number (``N``) to the file creates the number of child directories named ``0``
 to ``N-1``.  Each directory represents each monitoring probe.
 
-In each probe directory, one directory, ``filters`` exists.  The directory
-contains files for installing filters for the probe, that is used to determine
-the data attribute for the probe.
+In each probe directory, two directories, ``preps`` and ``filters`` exist.  The
+directories contain files for installing probing preparation actions and
+filters for the probe, that are used to determine the data attribute for the
+probe.
+
+In the beginning, ``preps`` directory has only one file, ``nr_preps``.
+Writing a number (``N``) to the file creates the number of child directories
+named ``0`` to ``N-1``.  Each directory represents each preparation action.
+Each directory has one file, ``prep_action``.  The preparation action can be
+selected by writing the name of the action to the ``prep_action`` file.  Refer
+to the :ref:`design doc <damon_design_data_attrs_monitoring>` for the list of
+supported actions.
 
 Each probe directory also contains ``weight`` file.  Reading from and writing
 to the file gets and sets the :ref:`attributes-only monitoring
_

Patches currently in -mm which might be from sj@kernel.org are

mm-damon-core-skip-applying-scheme-if-region-split-for-quota-fails.patch
mm-damon-paddr-respect-folio-end-for-damos_stat.patch
mm-damon-paddr-respect-folio-end-for-damos-actions-except-stat.patch
mm-damon-vaddr-respect-folio-end-for-damos_stat.patch
mm-damon-vaddr-respect-folio-end-for-damos_migrate_hotcold.patch
mm-damon-core-handle-extreme-memory-state-in-damon_get_node_mem_bp.patch
mm-damon-core-handle-extreme-memory-state-in-get_node_memcg_used_bp.patch
mm-damon-core-handle-extreme-memory-state-in-get_in_active_mem_bp.patch
mm-damon-core-introduce-damon_filter_type_pgidle_unset.patch
mm-damon-paddr-support-pgidle_unset-probe-filter-type.patch
mm-damon-sysfs-support-pgidle_unset-probe-filter-type.patch
docs-mm-damon-design-document-pgidle_unset-probe-filter-type.patch
mm-damon-core-introduce-damon_prep-struct.patch
mm-damon-core-commit-preps.patch
mm-damon-core-introduce-damon_operations-prep_probes.patch
mm-damon-paddr-support-damon_prep.patch
mm-damon-sysfs-implement-preps-directory.patch
mm-damon-sysfs-implement-preps-nr_preps-file.patch
mm-damon-sysfs-create-directories-for-nr_preps-writes.patch
mm-damon-sysfs-implement-prep_action-file.patch
mm-damon-sysfs-pass-preps-to-damon-core.patch
selftests-damon-sysfssh-test-probe-prep-sysfs-files.patch
docs-mm-damon-design-document-probe-preps.patch
docs-admin-guide-mm-damon-usage-document-probe-preps-sysfs-files.patch
docs-abi-damon-document-probe-prep-sysfs-files.patch