CONFIG_GRACE_PERIOD (not configurable)

modulename: grace.ko

configname: CONFIG_GRACE_PERIOD

Linux Kernel Configuration
└─>File systems
└─>Network File Systems
└─>GRACE_PERIOD
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
fs/nfs_common/grace.c

is depended by
CONFIG_NFSD_V4