PID_MAX_LIMIT    2781 fs/proc/base.c 	filp->f_pos = PID_MAX_LIMIT + TGID_OFFSET;
PID_MAX_LIMIT      15 include/linux/pid_namespace.h #define PIDMAP_ENTRIES         ((PID_MAX_LIMIT + 8*PAGE_SIZE - 1)/PAGE_SIZE/8)
PID_MAX_LIMIT      51 kernel/pid.c   int pid_max_max = PID_MAX_LIMIT;