From 65a17a3e609f63c7ea2887096dc232a6c05d02a2 Mon Sep 17 00:00:00 2001 From: Shu Anzai Date: Wed, 24 Dec 2025 04:21:58 +0000 Subject: [PATCH] mm/damon/tests/core-kunit: add a test case for region merge size limit in damon_test_merge_regions_of() Add a test case in damon_test_merge_regions_of() to verify that two adjacent regions are not merged if the resulting region would exceed the specified size limit. Link: https://lkml.kernel.org/r/20251224042200.2061847-4-shu17az@gmail.com Signed-off-by: Shu Anzai Reviewed-by: SeongJae Park Signed-off-by: Andrew Morton --- mm/damon/tests/core-kunit.h | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/mm/damon/tests/core-kunit.h b/mm/damon/tests/core-kunit.h index 6e301113e103b..2eb6f41635a87 100644 --- a/mm/damon/tests/core-kunit.h +++ b/mm/damon/tests/core-kunit.h @@ -238,12 +238,12 @@ static void damon_test_merge_regions_of(struct kunit *test) { struct damon_target *t; struct damon_region *r; - unsigned long sa[] = {0, 100, 114, 122, 130, 156, 170, 184}; - unsigned long ea[] = {100, 112, 122, 130, 156, 170, 184, 230}; - unsigned int nrs[] = {0, 0, 10, 10, 20, 30, 1, 2}; + unsigned long sa[] = {0, 100, 114, 122, 130, 156, 170, 184, 230}; + unsigned long ea[] = {100, 112, 122, 130, 156, 170, 184, 230, 10170}; + unsigned int nrs[] = {0, 0, 10, 10, 20, 30, 1, 2, 5}; - unsigned long saddrs[] = {0, 114, 130, 156, 170}; - unsigned long eaddrs[] = {112, 130, 156, 170, 230}; + unsigned long saddrs[] = {0, 114, 130, 156, 170, 230}; + unsigned long eaddrs[] = {112, 130, 156, 170, 230, 10170}; int i; t = damon_new_target(); @@ -261,9 +261,9 @@ static void damon_test_merge_regions_of(struct kunit *test) } damon_merge_regions_of(t, 9, 9999); - /* 0-112, 114-130, 130-156, 156-170 */ - KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 5u); - for (i = 0; i < 5; i++) { + /* 0-112, 114-130, 130-156, 156-170, 170-230, 230-10170 */ + KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 6u); + for (i = 0; i < 6; i++) { r = __nth_region_of(t, i); KUNIT_EXPECT_EQ(test, r->ar.start, saddrs[i]); KUNIT_EXPECT_EQ(test, r->ar.end, eaddrs[i]); -- 2.47.3