taglinefilesource code
time_tolerance128include/linux/timex.hextern long time_tolerance;  /* frequency tolerance (ppm) */
time_tolerance49kernel/sched.clong time_tolerance = MAXFREQ;  /* frequency tolerance (ppm) */
time_tolerance483kernel/sched.ctime_maxerror = (0x70000000-time_maxerror < time_tolerance) ?
time_tolerance484kernel/sched.c0x70000000 : (time_maxerror + time_tolerance);
time_tolerance370kernel/time.cltemp = time_tolerance << SHIFT_KF;
time_tolerance385kernel/time.ctxc.tolerance     = time_tolerance;