Comment 40 for bug 1784665

The 4.15.0-39 kernel FAILs:

+ make-bcache -C /dev/sdb
Can't open dev /dev/sdb: Device or resource busy
+ exit 1
Successful runs: 24
root@ubuntu:~# [ 242.655013] INFO: task kworker/3:103:2610 blocked for more than 120 seconds.
[ 242.665486] Not tainted 4.15.0-39-generic #43~lp1784665
[ 242.672393] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 242.682480] INFO: task bcache_allocato:5864 blocked for more than 120 seconds.
[ 242.698149] Not tainted 4.15.0-39-generic #43~lp1784665
[ 242.705883] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.