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b=RrDLMqsiYefqJ5d79fNnxVvcFSYtuDfZZZJ97LGdVq7EFv41zDhGggdm3+UyaSmxr PBOMZmxL2uVBPb9W16T3rkDri/sWtMjBRNITE3W2ZsiJpLLS3WMUrpNyhul7/r/AE5 ay6amn/VCsmnX1P3MXuSqH5Rhx505HaS2zABmsFN5D/kI5qMV7eGaYykqHmMfDZXqJ QzvGJFIN8DPHltAzVH62R2ibPehalNvmhc0V1L0pMKoMp8545eqMXpi4tSfkUKKjom mYo3L9c9Cpa02jP3NA/ssCK+or5eNXff2jYOyqPJ1vSCywS81h2qvbpfjXt8i5xyl3 5yE9/efUJBP1Q== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , Brendan Higgins , David Gow , damon@lists.linux.dev, kunit-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 2/7] mm/damon/tests/core-kunit: add a test for damon_is_last_region() Date: Sat, 7 Mar 2026 11:53:50 -0800 Message-ID: <20260307195356.203753-3-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260307195356.203753-1-sj@kernel.org> References: <20260307195356.203753-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 8E892A000A X-Stat-Signature: 5smarq84zgw5qneeg87edjruuox43nut X-HE-Tag: 1772913248-34600 X-HE-Meta: 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 mvbETV4Q y0w8mvHofgyO6WxnOpDryAawuRdp+pMdhDQkSMSKws8mZuovzi2Nam/6JEkaFVq7Ut4ilgkntGVWOMvD574I1fzFUANAIIXWYx1sXgqhYUn9AYh46Zhz/Nm9Aioz8Rw5rvUy55KtCkioyHDPBuFvl/PJydX6gZ6rQCP7BhPm00GzT+8LRnGkofATYwgYrfEPNGdQ34yJvfK/US2C0fbG8T/7nRigxv/NfoHorIJNUFyVARXXeo3U5AvQ0kPI2kfrm/gdP7NVNg+Ts/kTTeGHM3awCug== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: There was a bug [1] in damon_is_last_region(). Add a kunit test to not reintroduce the bug. [1] https://lore.kernel.org/20260114152049.99727-1-sj@kernel.org/ Signed-off-by: SeongJae Park --- mm/damon/tests/core-kunit.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/mm/damon/tests/core-kunit.h b/mm/damon/tests/core-kunit.h index 2289f9e4610c0..e86d4f4fe261a 100644 --- a/mm/damon/tests/core-kunit.h +++ b/mm/damon/tests/core-kunit.h @@ -1311,6 +1311,28 @@ static void damon_test_apply_min_nr_regions(struct kunit *test) damon_test_apply_min_nr_regions_for(test, 10, 2, 10, 2, 5); } +static void damon_test_is_last_region(struct kunit *test) +{ + struct damon_region *r; + struct damon_target *t; + int i; + + t = damon_new_target(); + if (!t) + kunit_skip(test, "target alloc fail\n"); + + for (i = 0; i < 4; i++) { + r = damon_new_region(i * 2, (i + 1) * 2); + if (!r) { + damon_free_target(t); + kunit_skip(test, "region alloc %d fail\n", i); + } + damon_add_region(r, t); + KUNIT_EXPECT_TRUE(test, damon_is_last_region(r, t)); + } + damon_free_target(t); +} + static struct kunit_case damon_test_cases[] = { KUNIT_CASE(damon_test_target), KUNIT_CASE(damon_test_regions), @@ -1339,6 +1361,7 @@ static struct kunit_case damon_test_cases[] = { KUNIT_CASE(damon_test_feed_loop_next_input), KUNIT_CASE(damon_test_set_filters_default_reject), KUNIT_CASE(damon_test_apply_min_nr_regions), + KUNIT_CASE(damon_test_is_last_region), {}, }; -- 2.47.3