mount -o remount -o rw / regression ?

[Engelmayer Christian]

Hello,

I have a use case where a file system partition gets
mounted read-only and a daemon is started from that
partition. At some times it is necessary to have that
partition read-writeable to update some files on it.

Under BusyBox 1.2.2 one could simply change the file
systems flags to 'rw' by issuing

   'mount -o remount -o rw /mnt/myMountPoint'

Since I upgraded to Busybox release 1.11.3 the same
scenario fails with 'Device or resource busy', as if
it was tried to unmount and mount the partition again,
which is not possible as the mentioned daemon is still
running.

Is this a desired change in the behavior or a regression?

Regards,
Christian