Can you grow a bcache cachedev without reformat?

[Eric Wheeler <bcache@xxxxxxxxxxxxxxxxxx>]

Hello all,

I know you can grow a backing device by unregister/re-register, but what 
about a cache dev?  

Will bcache detect a large cache volume if I unregister/re-register, or 
does it need reformatted with make-bcache -C ?


--
Eric Wheeler