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[35.188.239.129]) by smtp.gmail.com with ESMTPSA id v18-20020a05620a123200b007590aa4b115sm3296906qkj.87.2023.05.24.08.32.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 May 2023 08:32:55 -0700 (PDT) From: "Joel Fernandes (Google)" To: linux-kernel@vger.kernel.org Cc: "Joel Fernandes (Google)" , linux-kselftest@vger.kernel.org, linux-mm@kvack.org, Shuah Khan , Vlastimil Babka , Michal Hocko , Linus Torvalds , Lorenzo Stoakes , Kirill A Shutemov , "Liam R. Howlett" , "Paul E. McKenney" , Suren Baghdasaryan , Kalesh Singh , Lokesh Gidra Subject: [PATCH v3 4/6] selftests: mm: Add a test for mutually aligned moves > PMD size Date: Wed, 24 May 2023 15:32:37 +0000 Message-ID: <20230524153239.3036507-5-joel@joelfernandes.org> X-Mailer: git-send-email 2.40.1.698.g37aff9b760-goog In-Reply-To: <20230524153239.3036507-1-joel@joelfernandes.org> References: <20230524153239.3036507-1-joel@joelfernandes.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Stat-Signature: pgraounsazsq7bfajr56khnj51akk5hd X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: C69E040005 X-HE-Tag: 1684942376-984184 X-HE-Meta: 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 M10O9tLK wR2kB7teUByEu4qvDMS8Ody1BObOrFmSqhROYgvoIR0hOdAwEup6N5hUzl1KZLfwLRpcypMafBSniN3PGv1PwlGi03GKf1a0zSACXuBDoqGKrMPCOf3ECueaN3wTgDP+Bm3MzMXAYn3jBKXTEkBQ0yp1RAn+tQ9j3GLkFSxxadlJ8F9QNWKqLsnLyG7svjOg5TrgTl2NFBQlQNLqC+BJXzGkCXjzIaEoj58l2Ikc7AJ9Tq6anOefHSdutvh2+HItxhPwiRWBhNsarVt6Bq2zBOovRRmNYcswOl1Q2jTe14d4yA0FUbRtY9Fz8OJrBkblX2g3uLREcBS5+ABwrCLGaMrxhbU6h5c2r9bwK1jptHvQViyUOjc0DMVLkNnMoKeaTwoiZgL2KvHITifJ0mS6blqNhjQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: This patch adds a test case to check if a PMD-alignment optimization successfully happens. I add support to make sure there is some room before the source mapping, otherwise the optimization to trigger PMD-aligned move will be disabled as the kernel will detect that a mapping before the source exists and such optimization becomes impossible. Signed-off-by: Joel Fernandes (Google) --- tools/testing/selftests/mm/mremap_test.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/mm/mremap_test.c b/tools/testing/selftests/mm/mremap_test.c index 6822d657f589..6304eb0947a3 100644 --- a/tools/testing/selftests/mm/mremap_test.c +++ b/tools/testing/selftests/mm/mremap_test.c @@ -44,6 +44,7 @@ enum { _1MB = 1ULL << 20, _2MB = 2ULL << 20, _4MB = 4ULL << 20, + _5MB = 5ULL << 20, _1GB = 1ULL << 30, _2GB = 2ULL << 30, PMD = _2MB, @@ -235,6 +236,11 @@ static void *get_source_mapping(struct config c) unsigned long long mmap_min_addr; mmap_min_addr = get_mmap_min_addr(); + /* + * For some tests, we need to not have any mappings below the + * source mapping. Add some headroom to mmap_min_addr for this. + */ + mmap_min_addr += 10 * _4MB; retry: addr += c.src_alignment; @@ -434,7 +440,7 @@ static int parse_args(int argc, char **argv, unsigned int *threshold_mb, return 0; } -#define MAX_TEST 13 +#define MAX_TEST 14 #define MAX_PERF_TEST 3 int main(int argc, char **argv) { @@ -500,6 +506,10 @@ int main(int argc, char **argv) test_cases[12] = MAKE_TEST(PUD, PUD, _2GB, NON_OVERLAPPING, EXPECT_SUCCESS, "2GB mremap - Source PUD-aligned, Destination PUD-aligned"); + /* Src and Dest addr 1MB aligned. 5MB mremap. */ + test_cases[13] = MAKE_TEST(_1MB, _1MB, _5MB, NON_OVERLAPPING, EXPECT_SUCCESS, + "5MB mremap - Source 1MB-aligned, Destination 1MB-aligned"); + perf_test_cases[0] = MAKE_TEST(page_size, page_size, _1GB, NON_OVERLAPPING, EXPECT_SUCCESS, "1GB mremap - Source PTE-aligned, Destination PTE-aligned"); /* -- 2.40.1.698.g37aff9b760-goog