is a utility for displaying usage state of NILFS2 segments in
device, where a segment is contiguous lump of disk blocks and
an allocation unit of NILFS2 disk space. When device is
omitted, /proc/mounts is examined to find a NILFS2 file system.
This command will fail if the device has no active mounts of a
NILFS2 file system.
Do not hide clean segments.
Skip index segments at start of input.
List only lines input segments.
Display help message and exit.
Every line of the lssu output consists of the following fields:
State of the segment. It consists of three flags whose meaning is
The segment is active, meaning that it is recently created and cannot
be reclaimed by the garbage collector.
The segment is dirty, meaning that it is in use.
The segment is erroneous, meaning that it has once caused an I/O
error. NILFS2 avoids allocating the segments with this flag.