Hi all, I test ltp in Hisilicon D05 board and get a failed result about the testcase "migrate_pages01".
In fact, The sub testcase "test_invalid_nodes" failed. The testcase is to find a invalid numa node and migrate memory pages to this node via syscall of "migrate_pages". The expected result of this case is returning "-1", but it actually return "0". -------------------------------------------------------- # ./migrate_pages01 migrate_pages01 0 TINFO : test_empty_mask migrate_pages01 1 TPASS : expected ret success: returned value = 0 migrate_pages01 0 TINFO : test_invalid_pid -1 migrate_pages01 2 TPASS : expected ret success: returned value = -1 migrate_pages01 3 TPASS : expected failure: TEST_ERRNO=ESRCH(3): No such process migrate_pages01 0 TINFO : test_invalid_pid unused pid migrate_pages01 4 TPASS : expected ret success: returned value = -1 migrate_pages01 5 TPASS : expected failure: TEST_ERRNO=ESRCH(3): No such process migrate_pages01 0 TINFO : test_invalid_masksize migrate_pages01 6 TPASS : expected ret success: returned value = -1 migrate_pages01 7 TPASS : expected failure: TEST_ERRNO=EINVAL(22): Invalid argument migrate_pages01 0 TINFO : test_invalid_mem -1 migrate_pages01 8 TPASS : expected ret success: returned value = -1 migrate_pages01 9 TPASS : expected failure: TEST_ERRNO=EFAULT(14): Bad address migrate_pages01 0 TINFO : test_invalid_mem invalid prot migrate_pages01 10 TPASS : expected ret success: returned value = -1 migrate_pages01 11 TPASS : expected failure: TEST_ERRNO=EFAULT(14): Bad address migrate_pages01 0 TINFO : test_invalid_mem unmmaped migrate_pages01 12 TPASS : expected ret success: returned value = -1 migrate_pages01 13 TPASS : expected failure: TEST_ERRNO=EFAULT(14): Bad address migrate_pages01 0 TINFO : test_invalid_nodes migrate_pages01 14 TFAIL : migrate_pages_common.c:45: unexpected failure - returned value = 0, expected: -1 migrate_pages01 15 TFAIL : migrate_pages_common.c:55: call succeeded unexpectedly migrate_pages01 0 TINFO : test_invalid_perm migrate_pages01 16 TPASS : expected ret success: returned value = -1 migrate_pages01 17 TPASS : expected failure: TEST_ERRNO=EPERM(1): Operation not permitted -------------------------------------------------------- I debug and find a interesting thing, this case does not always fail. 1) If one or several numa nodes have no memory, this case will run successfully like below: -------------------- available: 4 nodes (0-3) node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 node 0 size: 65309 MB node 0 free: 61650 MB node 1 cpus: 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 node 1 size: 65404 MB node 1 free: 61377 MB node 2 cpus: 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 node 2 size: 65401 MB node 2 free: 62316 MB node 3 cpus: 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 node 3 size: 0 MB node 3 free: 0 MB node distances: node 0 1 2 3 0: 10 15 20 20 1: 15 10 20 20 2: 20 20 10 15 3: 20 20 15 10 --------------------- This testcase will find node number 3 and migrate pages to node 3. And syscall of "migrate_pages" return -1, test succeeded. 2) In most cases, all nodes have memory, and the testcase will get non-existent node like node number 4. The syscall of "migrate_pages" should also return -1, but return 0 actually. So the testcase failed. I think it is a problem in arm64. But I am not familiar with numa, so I ask for help from you. Thanks. Xiaojun.