CONFIG_DEBUG_TLB_SANITY is not available for thedefaultarchitecture x86.
Result is shown for architecture xtensa

Debug TLB sanity


Linux Kernel Configuration
└─>Debug TLB sanity
In linux kernel since version 3.11 (release Date: 2013-09-02)  
Enable this to turn on TLB sanity check on each entry to userspace.
This check can spot missing TLB invalidation/wrong PTE permissions/
premature page freeing.

If unsure, say N.