Comment 5 for bug 1357295

Looks like there's a pending patch[1].

I used the fix suggested by Sam Fulcomer[2] to set /sys/.../bcache/writeback_running to 0 because the cache mod we're using is writethrough.

| $ cat /sys/block/bcache0/bcache/writeback_running
| 1

| $cat /sys/block/bcache0/bcache/state
| clean

| $ cat /sys/block/bcache0/bcach/cache_mode
| [writethrough] writeback writearound none

Load seems to have dropped from a constant 2 to around 1. I've left it over night and am not seeing any more call traces being logged.

[1] http://permalink.gmane.org/gmane.linux.kernel.bcache.devel/2499
[2] http://permalink.gmane.org/gmane.linux.kernel.bcache.devel/2492