Free page reporting

modulename: page_reporting.ko

configname: CONFIG_PAGE_REPORTING

Linux Kernel Configuration
└─>Memory Management options
└─>Free page reporting
In linux kernel since version 5.1 (release Date: 2019-05-05)  
Free page reporting allows for the incremental acquisition of
free pages from the buddy allocator for the purpose of reporting
those pages to another entity, such as a hypervisor, so that the
memory can be freed within the host for other uses.

source code:
is depended by
CONFIG_VIRTIO_BALLOON