On Mon, Feb 10, 2020 at 05:02:01PM +0800, Qu Wenruo wrote:
> Since commit ecd4bb607f35 ("btrfs-progs: docs: enhance btrfs-filesystem
> manual page"), the man page of `btrfs filesystem` shows `sync`
> subcommand will wait for all existing orphan subvolumes to be dropped.
But this is not what the docs say, nor what the ioctl claims to do.
'trigger cleaning of deleted subvolumes' means that it just starts the
process in some way (eg. by waking up the cleaner kthread that does the
actual cleaning).
For waiting on the subvolumes there's 'btrfs subvol sync' and that works
as expected.
