BTRFS on LVM causes long fedora-storage-init run?

[Michael Cronenworth]

Tomasz Torcz wrote:
>    Do you have caches enabled and fully built?  Remounting with
> "-o space_cache,inode_cache" will enable them.  Then wait few minutes
> for caches to be built (I/O will stop when they're ready).  Subsequent
> mounts should be faster.

No. I'm using "defaults" as my mount option.

I'm hesitant to enable the caches as btrfs is still very experimental 
and I'd rather not have to rebuild the fs if something fails. I'm 
probably just going to format the drive as ext4 and wait for btrfs to 
mature.