The lsns command has been backported from the current upstream. We need another update for the code to reflect some lsns issues. The most visible problem is commit cc9b966c773cf4fcbdc5211ea0eec646727fb9d7 lsns: Fix parser for /proc/<pid>/stat which is including space in comm now lsns does not print any output in some cases, because there is bug in /proc/<pid>/stat parsing. It makes the util useless ...
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2018:3178