SMC intra-OS shortcut with loopback-ism

configname: CONFIG_SMC_LO

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>SMC intra-OS shortcut with loopback-ism
In linux kernel since version 4.19.318 (release Date: 2024-07-18)  
SMC_LO enables the creation of an Emulated-ISM device named
loopback-ism in SMC and makes use of it for transferring data
when communication occurs within the same OS. This helps in
convenient testing of SMC-D since loopback-ism is independent
of architecture or hardware.

if unsure, say N.