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mm/damon/core-test: test damon_set_regions

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Preceding commit fixes a bug in 'damon_set_regions()', which allows holes
in the new monitoring target ranges.  This commit adds a kunit test case
for the problem to avoid any regression.

Link: https://lkml.kernel.org/r/20220909202901.57977-4-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Yun Levi <ppbuk5246@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2022-09-09 20:28:57 +00:00 committed by Andrew Morton
parent 9c950c2283
commit 62f409560e
1 changed files with 23 additions and 0 deletions
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23
mm/damon/core-test.h
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@ -267,6 +267,28 @@ static void damon_test_ops_registration(struct kunit *test)
KUNIT_EXPECT_EQ(test, damon_register_ops(&ops), -EINVAL);
}
static void damon_test_set_regions(struct kunit *test)
{
struct damon_target *t = damon_new_target();
struct damon_region *r1 = damon_new_region(4, 16);
struct damon_region *r2 = damon_new_region(24, 32);
struct damon_addr_range range = {.start = 8, .end = 28};
unsigned long expects[] = {8, 16, 16, 24, 24, 28};
int expect_idx = 0;
struct damon_region *r;
damon_add_region(r1, t);
damon_add_region(r2, t);
damon_set_regions(t, &range, 1);
KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 3);
damon_for_each_region(r, t) {
KUNIT_EXPECT_EQ(test, r->ar.start, expects[expect_idx++]);
KUNIT_EXPECT_EQ(test, r->ar.end, expects[expect_idx++]);
}
damon_destroy_target(t);
}
static struct kunit_case damon_test_cases[] = {
KUNIT_CASE(damon_test_target),
KUNIT_CASE(damon_test_regions),
@ -276,6 +298,7 @@ static struct kunit_case damon_test_cases[] = {
KUNIT_CASE(damon_test_merge_regions_of),
KUNIT_CASE(damon_test_split_regions_of),
KUNIT_CASE(damon_test_ops_registration),
KUNIT_CASE(damon_test_set_regions),
{},
};