Bcache: Caching beyond just RAM

Well, with kernel bugs I meant kernel bugs not affecting this code and which by no means start writing random songs of some unknown guy(yeah, sorry, I don't know him) over your data, but still freeze the system. At that point basically the only real problem you could have is losing data on your hd(either just the data that didn't make it to the hd or the whole file you were writing at the time of the failure. The second case happened to me frequently with ext4 and I lost many normal data files because of it, while I was able instead to save some sources I was coding simply because I used git and I committed quite often).