Number of loop devices to pre-create at init time

configname: CONFIG_BLK_DEV_LOOP_MIN_COUNT

Linux Kernel Configuration
└─>Device Drivers
└─>Block devices
└─>Number of loop devices to pre-create at init time
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Static number of loop devices to be unconditionally pre-created
at init time.

This default value can be overwritten on the kernel command
line or with module-parameter loop.max_loop.

The historic default is 8. If a late 2011 version of losetup(8)
is used, it can be set to 0, since needed loop devices can be
dynamically allocated with the /dev/loop-control interface.