CONFIG_ARCH_EPHEMERAL_INODES (not configurable)

configname: CONFIG_ARCH_EPHEMERAL_INODES

Linux Kernel Configuration
└─>General architecture-dependent options
└─>ARCH_EPHEMERAL_INODES
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
An arch should select this symbol if it doesn't keep track of inode
instances on its own, but instead relies on something else (e.g. the
host kernel for an UML kernel).