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mm/damon/core-test: add a unit test for __damos_filter_out()

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Implement a kunit test for the core of address range DAMOS filter
handling, namely __damos_filter_out().  The test especially focus on
regions that overlap with given filter's target address range.

Link: https://lkml.kernel.org/r/20230802214312.110532-4-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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2023-08-02 21:43:02 +00:00 committed by Andrew Morton
parent 2f1abcfccd
commit 26713c8908
1 changed files with 61 additions and 0 deletions
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61
mm/damon/core-test.h
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@ -353,6 +353,66 @@ static void damos_test_new_filter(struct kunit *test)
damos_destroy_filter(filter);
}
static void damos_test_filter_out(struct kunit *test)
{
struct damon_target *t;
struct damon_region *r, *r2;
struct damos_filter *f;
f = damos_new_filter(DAMOS_FILTER_TYPE_ADDR, true);
f->addr_range = (struct damon_addr_range){
.start = DAMON_MIN_REGION * 2, .end = DAMON_MIN_REGION * 6};
t = damon_new_target();
r = damon_new_region(DAMON_MIN_REGION * 3, DAMON_MIN_REGION * 5);
damon_add_region(r, t);
/* region in the range */
KUNIT_EXPECT_TRUE(test, __damos_filter_out(NULL, t, r, f));
KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 1);
/* region before the range */
r->ar.start = DAMON_MIN_REGION * 1;
r->ar.end = DAMON_MIN_REGION * 2;
KUNIT_EXPECT_FALSE(test, __damos_filter_out(NULL, t, r, f));
KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 1);
/* region after the range */
r->ar.start = DAMON_MIN_REGION * 6;
r->ar.end = DAMON_MIN_REGION * 8;
KUNIT_EXPECT_FALSE(test, __damos_filter_out(NULL, t, r, f));
KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 1);
/* region started before the range */
r->ar.start = DAMON_MIN_REGION * 1;
r->ar.end = DAMON_MIN_REGION * 4;
KUNIT_EXPECT_FALSE(test, __damos_filter_out(NULL, t, r, f));
/* filter should have split the region */
KUNIT_EXPECT_EQ(test, r->ar.start, DAMON_MIN_REGION * 1);
KUNIT_EXPECT_EQ(test, r->ar.end, DAMON_MIN_REGION * 2);
KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 2);
r2 = damon_next_region(r);
KUNIT_EXPECT_EQ(test, r2->ar.start, DAMON_MIN_REGION * 2);
KUNIT_EXPECT_EQ(test, r2->ar.end, DAMON_MIN_REGION * 4);
damon_destroy_region(r2, t);
/* region started in the range */
r->ar.start = DAMON_MIN_REGION * 2;
r->ar.end = DAMON_MIN_REGION * 8;
KUNIT_EXPECT_TRUE(test, __damos_filter_out(NULL, t, r, f));
/* filter should have split the region */
KUNIT_EXPECT_EQ(test, r->ar.start, DAMON_MIN_REGION * 2);
KUNIT_EXPECT_EQ(test, r->ar.end, DAMON_MIN_REGION * 6);
KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 2);
r2 = damon_next_region(r);
KUNIT_EXPECT_EQ(test, r2->ar.start, DAMON_MIN_REGION * 6);
KUNIT_EXPECT_EQ(test, r2->ar.end, DAMON_MIN_REGION * 8);
damon_destroy_region(r2, t);
damon_free_target(t);
damos_free_filter(f);
}
static struct kunit_case damon_test_cases[] = {
KUNIT_CASE(damon_test_target),
KUNIT_CASE(damon_test_regions),
@ -366,6 +426,7 @@ static struct kunit_case damon_test_cases[] = {
KUNIT_CASE(damon_test_update_monitoring_result),
KUNIT_CASE(damon_test_set_attrs),
KUNIT_CASE(damos_test_new_filter),
KUNIT_CASE(damos_test_filter_out),
{},
};