I tried to mount a formerly readonly mounted filesystem read-writeable:
mount -o remount,rw /mountpoint
Unfortunately it did not work:
mount: /mountpoint not mounted already, or bad option
[2570543.520449] EXT4-fs (dm-0): Couldn't remount RDWR because of unprocessed orphan inode list. Please umount/remount instead
umount does not work, too:
umount /mountpoint umount: /mountpoint: device is busy. (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1))
fuser don't show any process accessing something located under the mount point.
So - how can I clean up this unprocessed orphan list to be able to mount the filesystem again without rebooting the computer?