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([208.184.112.130]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-121724de268sm48542031c88.8.2025.12.23.20.22.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 23 Dec 2025 20:22:22 -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 3/5] mm/damon/tests/core-kunit: add a test case for region merge size limit in damon_test_merge_regions_of() Date: Wed, 24 Dec 2025 04:21:58 +0000 Message-ID: <20251224042200.2061847-4-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" Add a test case in damon_test_merge_regions_of() to verify that=20 two adjacent regions are not merged if the resulting region would=20 exceed the specified size limit. Signed-off-by: Shu Anzai Reviewed-by: SeongJae Park --- mm/damon/tests/core-kunit.h | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/mm/damon/tests/core-kunit.h b/mm/damon/tests/core-kunit.h index 6e301113e103..2eb6f41635a8 100644 --- a/mm/damon/tests/core-kunit.h +++ b/mm/damon/tests/core-kunit.h @@ -238,12 +238,12 @@ static void damon_test_merge_regions_of(struct kunit = *test) { struct damon_target *t; struct damon_region *r; - unsigned long sa[] =3D {0, 100, 114, 122, 130, 156, 170, 184}; - unsigned long ea[] =3D {100, 112, 122, 130, 156, 170, 184, 230}; - unsigned int nrs[] =3D {0, 0, 10, 10, 20, 30, 1, 2}; + unsigned long sa[] =3D {0, 100, 114, 122, 130, 156, 170, 184, 230}; + unsigned long ea[] =3D {100, 112, 122, 130, 156, 170, 184, 230, 10170}; + unsigned int nrs[] =3D {0, 0, 10, 10, 20, 30, 1, 2, 5}; =20 - unsigned long saddrs[] =3D {0, 114, 130, 156, 170}; - unsigned long eaddrs[] =3D {112, 130, 156, 170, 230}; + unsigned long saddrs[] =3D {0, 114, 130, 156, 170, 230}; + unsigned long eaddrs[] =3D {112, 130, 156, 170, 230, 10170}; int i; =20 t =3D damon_new_target(); @@ -261,9 +261,9 @@ static void damon_test_merge_regions_of(struct kunit *t= est) } =20 damon_merge_regions_of(t, 9, 9999); - /* 0-112, 114-130, 130-156, 156-170 */ - KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 5u); - for (i =3D 0; i < 5; i++) { + /* 0-112, 114-130, 130-156, 156-170, 170-230, 230-10170 */ + KUNIT_EXPECT_EQ(test, damon_nr_regions(t), 6u); + for (i =3D 0; i < 6; i++) { r =3D __nth_region_of(t, i); KUNIT_EXPECT_EQ(test, r->ar.start, saddrs[i]); KUNIT_EXPECT_EQ(test, r->ar.end, eaddrs[i]); --=20 2.43.0