Bcache debugging

configname: CONFIG_BCACHE_DEBUG

Linux Kernel Configuration
└─>Device Drivers
└─>Multiple devices driver support (RAID and LVM)
└─>Bcache debugging
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Don't select this option unless you're a developer

Enables extra debugging tools, allows expensive runtime checks to be
turned on.