CONFIG_PAGE_IDLE_FLAG (not configurable)

configname: CONFIG_PAGE_IDLE_FLAG

Linux Kernel Configuration
└─>Memory Management options
└─>PAGE_IDLE_FLAG
In linux kernel since version 5.2 (release Date: 2019-07-07)  
This adds PG_idle and PG_young flags to 'struct page'. PTE Accessed
bit writers can set the state of the bit in the flags so that PTE
Accessed bit readers may avoid disturbance.