Comment # 14 on bug 1147412 from Gary Buchanan

(In reply to Coly Li from comment #12)
> For the backing disk busy issue, can you see a file 
>     /sys/fs/bcache/pendings_cleanup
> 
> If the kernel is new enough to have this file, try
>     echo 1 > /sys/fs/bcache/pendings_cleanup
> then the pending backing device (which is waiting for its dirty cache
> device) will be stopped.

I found this file while running a 5.5.7 kernel.  After figuring out that sudo
was not going to work, I did the echo. I had expected some reaction, did not
even return to the prompt.  I tried on other occasions, and got the same
thinhg. At some later time I thought to continue with the re-making of the
bcache set up.  For not knowing what I was doing, it all worked fine.  I was
able to destroy and re-create the cached/caching set up.  As far as I can tell,
it is working.  I am currently on a 5.6.2 kernel (Tumbleweed).

I do not actually have a Leap 15.x system, I have been using Tumbleweed almost
exclusively and have not updated past 42.3(?) on my
leave-it-alone-and-don't-mess-with-it system.

Gary B.