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mm/damon/tests/core-kunit: add a test case for region merge size limit in damon_test_merge_regions_of()

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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 <shu17az@gmail.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Shu Anzai
2025-12-24 04:21:58 +00:00
committed by Andrew Morton
parent 738dae96b2
commit 65a17a3e60
1 changed files with 8 additions and 8 deletions
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16
mm/damon/tests/core-kunit.h
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@@ -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]);