Skip to contentSkip to conversation

mm-damon-core-kunit-test-probe_hits-handling-at-region-split-and-merge.patch removed from -mm tree

merged mm-stable Andrew Morton 1 participant 1 message Oct 7

lore
Share & tools
lore

Andrew Morton

author tree notice Applied
#0 lore raw

The quilt patch titled
Subject: mm/damon/core-kunit: test probe_hits handling at region split and merge
has been removed from the -mm tree. Its filename was
mm-damon-core-kunit-test-probe_hits-handling-at-region-split-and-merge.patch

This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Jason Angelov <[email protected]>
Subject: mm/damon/core-kunit: test probe_hits handling at region split and merge
Date: Mon, 31 Aug 2026 08:06:48 -0700

Patch series "mm/damon: add kunit tests for probe_hits handling and probe params validation", v2.

DAMON recently introduced probes and probe weights. Add kunit tests for the propagation of probe_hits at region split and merge, and the rejection of invalid probe parameters by damon_valid_probe_params().

This patch (of 2):

damon_split_region_at() copies probe_hits[] and last_probe_hits[] to the new split region.

damon_merge_two_regions() sets probe_hits[] to the size-weighted average of the merged regions.

Extend damon_test_split_at() and damon_test_merge_two() tests to cover those fields.

Link https://lore.kernel.org/[email protected] open here
Link https://lore.kernel.org/[email protected] open here
Signed-off-by Jason Angelov <[email protected]>
Signed-off-by SJ Park <[email protected]>
Signed-off-by Andrew Morton <[email protected]>
Reviewed-by SJ Park <[email protected]>
Cc David Gow <[email protected]>
Cc Brendan Higgins <[email protected]>

---

 mm/damon/tests/core-kunit.h |    7 +++++++
 1 file changed, 7 insertions(+)
mm/damon/tests/core-kunit.h renamed from mm/damon/tests/core-kunit.h~mm-damon-core-kunit-test-probe_hits-handling-at-region-split-and-merge +7 -0
@@ -152,6 +152,8 @@ static void damon_test_split_at(struct k
 	}
 	r->nr_accesses = 42;
 	r->last_nr_accesses = 15;
+	r->probe_hits[0] = 7;
+	r->last_probe_hits[0] = 3;
 	r->age = 10;
 	damon_add_region(r, t);
 	damon_split_region_at(t, r, 25);

@@ -168,6 +170,8 @@ static void damon_test_split_at(struct k
 
 	KUNIT_EXPECT_EQ(test, r->nr_accesses, r_new->nr_accesses);
 	KUNIT_EXPECT_EQ(test, r->last_nr_accesses, r_new->last_nr_accesses);
+	KUNIT_EXPECT_EQ(test, r->probe_hits[0], r_new->probe_hits[0]);
+	KUNIT_EXPECT_EQ(test, r->last_probe_hits[0], r_new->last_probe_hits[0]);
 	KUNIT_EXPECT_EQ(test, r->age, r_new->age);
 
 out:

@@ -189,6 +193,7 @@ static void damon_test_merge_two(struct
 		kunit_skip(test, "region alloc fail");
 	}
 	r->nr_accesses = 10;
+	r->probe_hits[0] = 6;
 	r->age = 9;
 	damon_add_region(r, t);
 	r2 = damon_new_region(100, 300);

@@ -197,6 +202,7 @@ static void damon_test_merge_two(struct
 		kunit_skip(test, "second region alloc fail");
 	}
 	r2->nr_accesses = 20;
+	r2->probe_hits[0] = 14;
 	r2->age = 21;
 	damon_add_region(r2, t);
 

@@ -204,6 +210,7 @@ static void damon_test_merge_two(struct
 	KUNIT_EXPECT_EQ(test, r->ar.start, 0ul);
 	KUNIT_EXPECT_EQ(test, r->ar.end, 300ul);
 	KUNIT_EXPECT_EQ(test, r->nr_accesses, 16u);
+	KUNIT_EXPECT_EQ(test, r->probe_hits[0], 11);
 	KUNIT_EXPECT_EQ(test, r->age, 17u);
 
 	i = 0;

_

Patches currently in -mm which might be from [email protected] are