+ selftests-damon-_damon_sysfs-support-damos-action-dests-setup.patch added to mm-new branch

+ selftests-damon-_damon_sysfs-support-damos-action-dests-setup.patch added to mm-new branch

[Andrew Morton]

The patch titled
     Subject: selftests/damon/_damon_sysfs: support DAMOS action dests setup
has been added to the -mm mm-new branch.  Its filename is
     selftests-damon-_damon_sysfs-support-damos-action-dests-setup.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-damon-_damon_sysfs-support-damos-action-dests-setup.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.

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------------------------------------------------------
From: SeongJae Park <sj@kernel.org>
Subject: selftests/damon/_damon_sysfs: support DAMOS action dests setup
Date: Sun, 20 Jul 2025 10:16:36 -0700

_damon_sysfs.py contains code for test-purpose DAMON sysfs interface
control.  Add support of DAMOS action destinations setup for more tests.

Link: https://lkml.kernel.org/r/20250720171652.92309-7-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/damon/_damon_sysfs.py |   56 +++++++++++++++-
 1 file changed, 55 insertions(+), 1 deletion(-)

--- a/tools/testing/selftests/damon/_damon_sysfs.py~selftests-damon-_damon_sysfs-support-damos-action-dests-setup
+++ a/tools/testing/selftests/damon/_damon_sysfs.py
@@ -319,6 +319,52 @@ class DamosFilters:
                 return err
         return None
 
+class DamosDest:
+    id = None
+    weight = None
+    idx = None
+    dests = None    # owner dests
+
+    def __init__(self, id=0, weight=0):
+        self.id = id
+        self.weight = weight
+
+    def sysfs_dir(self):
+        return os.path.join(self.dests.sysfs_dir(), '%d' % self.idx)
+
+    def stage(self):
+        err = write_file(os.path.join(self.sysfs_dir(), 'id'), self.id)
+        if err is not None:
+            return err
+        err = write_file(os.path.join(self.sysfs_dir(), 'weight'), self.weight)
+        if err is not None:
+            return err
+        return None
+
+class DamosDests:
+    dests = None
+    scheme = None   # owner scheme
+
+    def __init__(self, dests=[]):
+        self.dests = dests
+        for idx, dest in enumerate(self.dests):
+            dest.idx = idx
+            dest.dests = self
+
+    def sysfs_dir(self):
+        return os.path.join(self.scheme.sysfs_dir(), 'dests')
+
+    def stage(self):
+        err = write_file(os.path.join(self.sysfs_dir(), 'nr_dests'),
+                         len(self.dests))
+        if err is not None:
+            return err
+        for dest in self.dests:
+            err = dest.stage()
+            if err is not None:
+                return err
+        return None
+
 class DamosStats:
     nr_tried = None
     sz_tried = None
@@ -349,6 +395,7 @@ class Damos:
     ops_filters = None
     filters = None
     apply_interval_us = None
+    dests = None
     idx = None
     context = None
     tried_bytes = None
@@ -358,7 +405,7 @@ class Damos:
     def __init__(self, action='stat', access_pattern=DamosAccessPattern(),
                  quota=DamosQuota(), watermarks=DamosWatermarks(),
                  core_filters=[], ops_filters=[], filters=[],
-                 apply_interval_us=0):
+                 dests=DamosDests(), apply_interval_us=0):
         self.action = action
         self.access_pattern = access_pattern
         self.access_pattern.scheme = self
@@ -376,6 +423,9 @@ class Damos:
         self.filters = DamosFilters(name='filters', filters=filters)
         self.filters.scheme = self
 
+        self.dests = dests
+        self.dests.scheme = self
+
         self.apply_interval_us = apply_interval_us
 
     def sysfs_dir(self):
@@ -412,6 +462,10 @@ class Damos:
         if err is not None:
             return err
 
+        err = self.dests.stage()
+        if err is not None:
+            return err
+
 class DamonTarget:
     pid = None
     # todo: Support target regions if test is made
_

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

mm-damon-core-commit-damos_quota_goal-nid.patch
mm-damon-sysfs-implement-refresh_ms-file-under-kdamond-directory.patch
mm-damon-sysfs-implement-refresh_ms-file-internal-work.patch
docs-admin-guide-mm-damon-usage-document-refresh_ms-file.patch
docs-abi-damon-update-for-refresh_ms.patch
mm-damon-ops-common-ignore-migration-request-to-invalid-nodes.patch
selftests-damon-_damon_sysfs-support-damos-watermarks-setup.patch
selftests-damon-_damon_sysfs-support-damos-filters-setup.patch
selftests-damon-_damon_sysfs-support-monitoring-intervals-goal-setup.patch
selftests-damon-_damon_sysfs-support-damos-quota-weights-setup.patch
selftests-damon-_damon_sysfs-support-damos-quota-goal-nid-setup.patch
selftests-damon-_damon_sysfs-support-damos-action-dests-setup.patch
selftests-damon-_damon_sysfs-support-damos-target_nid-setup.patch
selftests-damon-_damon_sysfs-use-232-1-as-max-nr_accesses-and-age.patch
selftests-damon-drgn_dump_damon_status-dump-damos-migrate_dests.patch
selftests-damon-drgn_dump_damon_status-dump-ctx-opsid.patch
selftests-damon-drgn_dump_damon_status-dump-damos-filters.patch
selftests-damon-sysfspy-generalize-damos-watermarks-commit-assertion.patch
selftests-damon-sysfspy-generalize-damosquota-commit-assertion.patch
selftests-damon-sysfspy-test-quota-goal-commitment.patch
selftests-damon-sysfspy-test-damos-destinations-commitment.patch
selftests-damon-sysfspy-generalize-damos-access-pattern-commit-assertion.patch
selftests-damon-sysfspy-test-damos-filters-commitment.patch
selftests-damon-sysfspy-generalize-damos-schemes-commit-assertion.patch
selftests-damon-sysfspy-generalize-monitoring-attributes-commit-assertion.patch
selftests-damon-sysfspy-generalize-damon-context-commit-assertion.patch
selftests-damon-sysfspy-test-non-default-parameters-runtime-commit.patch
selftests-damon-sysfspy-test-runtime-reduction-of-damon-parameters.patch