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Shutemov" , David Hildenbrand , Yang Shi , Miaohe Lin , Kefeng Wang , Yu Zhao , John Hubbard , Baolin Wang , linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Zi Yan , Kairui Song Subject: [PATCH v10 8/8] selftests/mm: add tests for folio_split(), buddy allocator like split Date: Fri, 7 Mar 2025 12:40:01 -0500 Message-ID: <20250307174001.242794-9-ziy@nvidia.com> X-Mailer: git-send-email 2.47.2 In-Reply-To: <20250307174001.242794-1-ziy@nvidia.com> References: <20250307174001.242794-1-ziy@nvidia.com> X-ClientProxiedBy: BLAPR03CA0127.namprd03.prod.outlook.com (2603:10b6:208:32e::12) To DS7PR12MB9473.namprd12.prod.outlook.com (2603:10b6:8:252::5) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS7PR12MB9473:EE_|LV2PR12MB6014:EE_ X-MS-Office365-Filtering-Correlation-Id: 4b1ec0c4-8235-476d-7c8a-08dd5d9f2118 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|366016|1800799024; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DS7PR12MB9473.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(376014)(7416014)(366016)(1800799024);DIR:OUT;SFP:1101; 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Signed-off-by: Zi Yan Cc: Baolin Wang Cc: David Hildenbrand Cc: Hugh Dickins Cc: John Hubbard Cc: Kefeng Wang Cc: Kirill A. Shuemov Cc: Matthew Wilcox Cc: Miaohe Lin Cc: Ryan Roberts Cc: Yang Shi Cc: Yu Zhao Cc: Kairui Song --- .../selftests/mm/split_huge_page_test.c | 34 +++++++++++++++---- 1 file changed, 27 insertions(+), 7 deletions(-) diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c index e0304046b1a0..719c5e2a6624 100644 --- a/tools/testing/selftests/mm/split_huge_page_test.c +++ b/tools/testing/selftests/mm/split_huge_page_test.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -456,7 +457,8 @@ int create_pagecache_thp_and_fd(const char *testfile, size_t fd_size, int *fd, return -1; } -void split_thp_in_pagecache_to_order(size_t fd_size, int order, const char *fs_loc) +void split_thp_in_pagecache_to_order_at(size_t fd_size, const char *fs_loc, + int order, int offset) { int fd; char *addr; @@ -474,7 +476,12 @@ void split_thp_in_pagecache_to_order(size_t fd_size, int order, const char *fs_l return; err = 0; - write_debugfs(PID_FMT, getpid(), (uint64_t)addr, (uint64_t)addr + fd_size, order); + if (offset == -1) + write_debugfs(PID_FMT, getpid(), (uint64_t)addr, + (uint64_t)addr + fd_size, order); + else + write_debugfs(PID_FMT, getpid(), (uint64_t)addr, + (uint64_t)addr + fd_size, order, offset); for (i = 0; i < fd_size; i++) if (*(addr + i) != (char)i) { @@ -493,9 +500,15 @@ void split_thp_in_pagecache_to_order(size_t fd_size, int order, const char *fs_l munmap(addr, fd_size); close(fd); unlink(testfile); - if (err) - ksft_exit_fail_msg("Split PMD-mapped pagecache folio to order %d failed\n", order); - ksft_test_result_pass("Split PMD-mapped pagecache folio to order %d passed\n", order); + if (offset == -1) { + if (err) + ksft_exit_fail_msg("Split PMD-mapped pagecache folio to order %d failed\n", order); + ksft_test_result_pass("Split PMD-mapped pagecache folio to order %d passed\n", order); + } else { + if (err) + ksft_exit_fail_msg("Split PMD-mapped pagecache folio to order %d at in-folio offset %d failed\n", order, offset); + ksft_test_result_pass("Split PMD-mapped pagecache folio to order %d at in-folio offset %d passed\n", order, offset); + } } int main(int argc, char **argv) @@ -506,6 +519,7 @@ int main(int argc, char **argv) char fs_loc_template[] = "/tmp/thp_fs_XXXXXX"; const char *fs_loc; bool created_tmp; + int offset; ksft_print_header(); @@ -517,7 +531,7 @@ int main(int argc, char **argv) if (argc > 1) optional_xfs_path = argv[1]; - ksft_set_plan(1+8+1+9+9); + ksft_set_plan(1+8+1+9+9+8*4+2); pagesize = getpagesize(); pageshift = ffs(pagesize) - 1; @@ -540,7 +554,13 @@ int main(int argc, char **argv) created_tmp = prepare_thp_fs(optional_xfs_path, fs_loc_template, &fs_loc); for (i = 8; i >= 0; i--) - split_thp_in_pagecache_to_order(fd_size, i, fs_loc); + split_thp_in_pagecache_to_order_at(fd_size, fs_loc, i, -1); + + for (i = 0; i < 9; i++) + for (offset = 0; + offset < pmd_pagesize / pagesize; + offset += MAX(pmd_pagesize / pagesize / 4, 1 << i)) + split_thp_in_pagecache_to_order_at(fd_size, fs_loc, i, offset); cleanup_thp_fs(fs_loc, created_tmp); ksft_finished();