On Thu, Feb 25, 2016 at 06:46:33PM -0800, Marc MERLIN wrote:

Given that, I'm happy to run code that spits out diagostics, but probably
not something that will attempt to write an outdated cache on a filesytem
that's already ahead.
Or does bcache understand that the backing device is ahead already and the
cache should just be discarded?

Yeah, sorry, I did forget to mention that I did a force run on the backing
device so that I could get to its data.
In doing so, I probably invalidated options to try and reply the cache to
see if things would crash, or not, sorry about that.

Now, if I try to make the cache available again, will the code be smart and
not try to reapply a stale cache (never mind that it's probably corrupted in
addition to being old?)

Thanks,
Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/