Hi, When I ran the unit tests, I found "libndctl" and "dsm-fail" cannot pass the test. Here is the test log. # less test/libndctl.log libkmod: kmod_module_remove_module: could not remove 'nfit_test': No such file or directory check_set_config_data: dimm: 0 read2 data miscompare: 0 check_set_config_data: dimm: 0x1 read2 data miscompare: 0 check_set_config_data: dimm: 0x100 read2 data miscompare: 0 check_set_config_data: dimm: 0x101 read2 data miscompare: 0 check_dax_autodetect: dax_ndns: 0x1049f10 ndns: 0x1049f10 namespace1.0: expected write_cache enabled check_namespaces: namespace1.0 validate_write_cache failed ndctl-test0 failed: -6 libkmod: kmod_module_remove_module: could not remove 'nfit_test': Resource temporarily unavailable libdaxctl: daxctl_unref: context 0x1038170 released libndctl: ndctl_unref: context 0x1039290 released FAIL libndctl (exit status: 1) # less test/dsm-fail.log victim: nmem0 validate_namespace_options:571: region1: falling back to a 4K alignment validate_namespace_options:571: region1: falling back to a 4K alignment do_test:294 libndctl: ndctl_dimm_enable: nmem0: failed to enable fail expected nmem0 enable success victim: nmem0 rc: -6 libkmod: kmod_module_remove_module: could not remove 'nfit_test': Resource temporarily unavailable libdaxctl: daxctl_unref: context 0x89f170 released libndctl: ndctl_unref: context 0x8a0290 released { "dev":"namespace1.0", "mode":"raw", "size":4194304, "uuid":"9a07ca1d-54cd-4252-b87e-475b24af8a1c", "sector_size":512, "blockdev":"pmem1" } { "dev":"namespace1.1", "mode":"raw", "size":4194304, "uuid":"2eb40a75-5c5f-4ed9-b36e-4fd0abba7783", "sector_size":512, "blockdev":"pmem1.1" } FAIL dsm-fail (exit status: 250) And my kernel version: $ uname -a Linux 4.18.0-rc2+ #25 SMP I guess the reason is that the nfit_test module cannot be removed. # modprobe -r nfit_test modprobe: FATAL: Module nfit_test is in use. # lsmod | grep nfit_test nfit_test 40960 8 nd_pmem 20480 1 nfit_test nfit 65536 1 nfit_test device_dax 20480 2 dax_pmem,nfit_test libnvdimm 163840 7 dax_pmem,nfit_test,nd_btt,nd_pmem,nd_e820,nd_blk,nfit nfit_test_iomap 20480 6 dax_pmem,nfit_test,device_dax,nd_pmem,libnvdimm,nfit Does anyone know how to fix it? Thank you very much. QI