Running generic/192 with overlayfs(Let ubifs as base fs) yields the following output: generic/192 - output mismatch QA output created by 192 sleep for 5 seconds test +./common/rc: line 316: src/t_dir_type: No such file or directory delta1 is in range delta2 is in range ... When the use case fails, the call stack in generic/192 is: local unknowns=$(src/t_dir_type $dir u | wc -l) common/rc:316 _supports_filetype common/rc:299 _overlay_mount common/overlay:52 _overlay_test_mount common/overlay:93 _test_mount common/rc:407 _test_cycle_mount generic/192:50 Before _test_cycle_mount() being invoked, generic/192 executed 'cd /' to change work dir from 'xfstests-dev' to '/', so src/t_dir_type was not found. Signed-off-by: Zhihao Cheng <chengzhihao1@xxxxxxxxxx> --- common/rc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/common/rc b/common/rc index cfaabf10..28c27975 100644 --- a/common/rc +++ b/common/rc @@ -313,7 +313,7 @@ _supports_filetype() local testfile=$dir/$$.ftype touch $testfile # look for DT_UNKNOWN files - local unknowns=$(src/t_dir_type $dir u | wc -l) + local unknowns=$($here/src/t_dir_type $dir u | wc -l) rm $testfile # 0 unknowns is success return $unknowns -- 2.13.6