[Btrfs-devel] cloning file data

[Zach Brown]

> Running debug-tree on a live FS is a very good way to learn about trees that 
> get left around while snapshot deletion is happening and cache aliasing 
> caused by the way Btrfs puts metadata into its own address space.
> 
> But, if you're trying to learn the disk format, I'd stick an unmount between 
> the dd and the debug-tree ;)

Haha, true, true.  If you don't know to watch for confusing racey
results, indeed, serialize around each dump :).

- z