Offset and size should be aligned with cluster_size when inserting or collapsing range on ext4 with 'bigalloc' enabled. Currently fsx only align offset/size with block size. In fact I have no idea which is the best way to fix this isue. On one hand, fsx should be general and has no knowledge of the underlying filesystem. Besides the cluster size seems to be stored on ext4_super_block and there's no easy way to get it. But on the oter hand, quite many tests call fsx directly, e.g., generic/127, rather than the generic routine run_fsx() defined in common/rc. Jeffle Xu (2): xfstests: fsx: add support for cluster size xfstests: common/rc: add cluster size support for ext4 common/rc | 9 +++++++++ ltp/fsx.c | 20 ++++++++++++++------ 2 files changed, 23 insertions(+), 6 deletions(-) -- 1.8.3.1