When fsusage scans mtab, it matches on the first entry, but since 'rootfs' isn't of the expected format '/dev/<blah>' it bails out. Match early on any rootfs entries and skip them. Fixes #685897
When fsusage scans mtab, it matches on the first entry, but since 'rootfs' isn't of the expected format '/dev/<blah>' it bails out. Match early on any rootfs entries and skip them. Fixes #685897