# v0.55b

10/28/2012



* Feature #2726: krbd: clean up bio_pair leak/whatever
* Feature #3051: ObjectCacher: negative object caching
* Feature #3262: librbd: use 'assert exists' operation to guard cloned writes
* Feature #3398: ObjectCacher: add ZERO BufferHead type
* Feature #3407: qa: add krbd + btrfs + stuff (iozone, fsstress) to suite