tag	line	file	source code
shm_dtime	9	include/linux/shm.h	time_t  shm_dtime;    /* last detach time */
shm_dtime	113	ipc/shm.c	shp->shm_atime = shp->shm_dtime = 0;
shm_dtime	494	ipc/shm.c	shp->shm_dtime = CURRENT_TIME;