taglinefilesource code
time_tolerance128include/linux/timex.hextern long time_tolerance;  /* frequency tolerance (ppm) */
time_tolerance52kernel/sched.clong time_tolerance = MAXFREQ;  /* frequency tolerance (ppm) */
time_tolerance473kernel/sched.ctime_maxerror = (0x70000000-time_maxerror < time_tolerance) ?
time_tolerance474kernel/sched.c0x70000000 : (time_maxerror + time_tolerance);
time_tolerance402kernel/time.cltemp = time_tolerance << SHIFT_KF;
time_tolerance420kernel/time.ctxc.tolerance     = time_tolerance;