On Fri, Aug 16, 2019 at 11:03:33AM +0100, Filipe Manana wrote: > > Originally planned to use this feature to catch the exact update, but > > the problem is, with this pressure, we need an extra ioctl to wait the > > full subvolume drop to finish. > > That, the ioctl to wait (or better, poll) for subvolume removal to > complete (either all subvolumes or just a specific one), would be > useful. The polling for subvolume drop is implemented using the SEARCH_TREE ioctl and provided as 'btrfs subvolume sync' command. Is there something that this approach does not provide and would need a new ioctl?
