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authorSeongJae Park <sj@kernel.org>2023-08-03 00:43:02 +0300
committerAndrew Morton <akpm@linux-foundation.org>2023-08-21 23:37:35 +0300
commit26713c8908752a7edca18dcafe88e36dccfb41a2 (patch)
treeb44bc237fadf96ead2d284bc5e370724ecbd55d8 /mm/damon
parent2f1abcfccd86826777b2bcb2bb4e0d149a90ccf5 (diff)
downloadlinux-26713c8908752a7edca18dcafe88e36dccfb41a2.tar.xz
mm/damon/core-test: add a unit test for __damos_filter_out()
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>
Diffstat (limited to 'mm/damon')
-rw-r--r--mm/damon/core-test.h61
1 files changed, 61 insertions, 0 deletions
diff --git a/mm/damon/core-test.h b/mm/damon/core-test.h
index 4bddbfe243c3..6cc8b245586d 100644
--- a/mm/damon/core-test.h
+++ b/mm/damon/core-test.h
@@ -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),
{},
};