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[34.123.190.156]) by smtp.gmail.com with ESMTPSA id q11-20020a92d40b000000b0034886587bdcsm2907390ilm.18.2023.08.21.18.55.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Aug 2023 18:55:23 -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 v5 4/7] selftests: mm: Add a test for mutually aligned moves > PMD size Date: Tue, 22 Aug 2023 01:54:57 +0000 Message-ID: <20230822015501.791637-5-joel@joelfernandes.org> X-Mailer: git-send-email 2.42.0.rc1.204.g551eb34607-goog In-Reply-To: <20230822015501.791637-1-joel@joelfernandes.org> References: <20230822015501.791637-1-joel@joelfernandes.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Stat-Signature: pwxo1da36smif7ip4q9m1jphw9sfesqn X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 0A41A140010 X-HE-Tag: 1692669324-942367 X-HE-Meta: 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 bfIcoryY ftAhQAtiVWK9FxO8QEqMqd0QnsfEh6RFOQ+0UBBpepUwMaJVVN0DfLhqnZim7rrRJ0ujuxAR+TCtGuy1cxn5EPV7XuX7FPIWKKWhc44pDgiwtM5AFvNSyQWYyqeiBJWngBfV11cKUHKxWz6fnr+eL77hKZh8u9uRDUdH5MONVGn7oNbCsq+O3MT8qa2aHcoxx64y+OpD+mj4nWD2ji4R70FbhcVepi7yyULWB0ty7Q+Fde1hvjCLuhG/BgJCsPxThDH5dRvher8npm6SrUyHnyCB7Q1XJqFszk7LnnnlpDWLbeHFm78k8g0ll4XQ167fQorVds+1h8vS1ppTAveM8yrxRpejX0egwsg9HzzOk2nmPcPRtuDVn1OVVddbTt+mJokIaqn8HXKp8+RUsBJ7quqjB9g== 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"); /* -- 2.42.0.rc1.204.g551eb34607-goog