+static noinline void handle_lost_ticks(int lost)
+{
+ static long lost_count;
+ static int warned;
+ if (report_lost_ticks) {
+ printk(KERN_WARNING "time.c: Lost %d timer tick(s)! ", lost);
+ print_symbol("rip %s)\n", get_irq_regs()->rip);
+ }
+
+ if (lost_count == 1000 && !warned) {
+ printk(KERN_WARNING "warning: many lost ticks.\n"
+ KERN_WARNING "Your time source seems to be instable or "
+ "some driver is hogging interupts\n");
+ print_symbol("rip %s\n", get_irq_regs()->rip);
+ if (vxtime.mode == VXTIME_TSC && vxtime.hpet_address) {
+ printk(KERN_WARNING "Falling back to HPET\n");
+ if (hpet_use_timer)
+ vxtime.last = hpet_readl(HPET_T0_CMP) -
+ hpet_tick;
+ else
+ vxtime.last = hpet_readl(HPET_COUNTER);
+ vxtime.mode = VXTIME_HPET;
+ do_gettimeoffset = do_gettimeoffset_hpet;
+ }
+ /* else should fall back to PIT, but code missing. */
+ warned = 1;
+ } else
+ lost_count++;