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([208.184.112.130]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-121724de268sm48542031c88.8.2025.12.23.20.22.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Dec 2025 20:22:24 -0800 (PST) From: Shu Anzai To: SeongJae Park Cc: Andrew Morton , damon@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Shu Anzai Subject: [PATCH v2 4/5] mm/damon/tests/core-kunit: add test cases for multiple regions in damon_test_split_regions_of() Date: Wed, 24 Dec 2025 04:21:59 +0000 Message-ID: <20251224042200.2061847-5-shu17az@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251224042200.2061847-1-shu17az@gmail.com> References: <20251224042200.2061847-1-shu17az@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Extend damon_test_split_regions_of() to verify that it correctly handles=20 multiple regions with various 'min_sz_region'. Signed-off-by: Shu Anzai Reviewed-by: SeongJae Park --- mm/damon/tests/core-kunit.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/mm/damon/tests/core-kunit.h b/mm/damon/tests/core-kunit.h index 2eb6f41635a8..36622a2c11f1 100644 --- a/mm/damon/tests/core-kunit.h +++ b/mm/damon/tests/core-kunit.h @@ -275,6 +275,9 @@ static void damon_test_split_regions_of(struct kunit *t= est) { struct damon_target *t; struct damon_region *r; + unsigned long sa[] =3D {0, 300, 500}; + unsigned long ea[] =3D {220, 400, 700}; + int i; =20 t =3D damon_new_target(); if (!t) @@ -301,6 +304,24 @@ static void damon_test_split_regions_of(struct kunit *= test) damon_split_regions_of(t, 4, 1); KUNIT_EXPECT_LE(test, damon_nr_regions(t), 4u); damon_free_target(t); + + t =3D damon_new_target(); + if (!t) + kunit_skip(test, "third target alloc fail"); + for (i =3D 0; i < ARRAY_SIZE(sa); i++) { + r =3D damon_new_region(sa[i], ea[i]); + if (!r) { + damon_free_target(t); + kunit_skip(test, "region alloc fail"); + } + damon_add_region(r, t); + } + damon_split_regions_of(t, 4, 5); + KUNIT_EXPECT_LE(test, damon_nr_regions(t), 12u); + damon_for_each_region(r, t) { + KUNIT_EXPECT_GE(test, damon_sz_region(r) % 5ul, 0ul); + } + damon_free_target(t); } =20 static void damon_test_ops_registration(struct kunit *test) --=20 2.43.0