-v0.4
-/- btrfs latency. update howto.
-/- snap garbage collection
-/- journal
-
v0.5
- ENOSPC
+- efficient snap recovery
+- throttle osd recovery?
- finish client failure recovery (reconnect after long eviction; and slow delayed reconnect)
- make kclient use ->sendpage?
- rip out io interruption?
- whats with the 'clear if dirtyscattered' bit in decode_import_inode()?
+- what if a recovery is queued, or in progress, and the inode is then cowed? can that happen?
+
- proper handling of cache expire messages during rejoin phase?
-> i think cache expires are fine; the rejoin_ack handler just has to behave if rejoining items go missing
- try_remove_unlinked_dn thing