unsigned long ticks = 0;
ktime_t delta;
+ /*
+ * Do a quick check without holding xtime_lock:
+ */
+ delta = ktime_sub(now, last_jiffies_update);
+ if (delta.tv64 < tick_period.tv64)
+ return;
+
/* Reevalute with xtime_lock held */
write_seqlock(&xtime_lock);
if (!ts->tick_stopped)
return;
- touch_softlockup_watchdog();
-
cpu_clear(cpu, nohz_cpu_mask);
now = ktime_get();
ts->idle_waketime = now;
local_irq_save(flags);
tick_do_update_jiffies64(now);
local_irq_restore(flags);
+
+ touch_softlockup_watchdog();
}
void tick_nohz_stop_idle(int cpu)
* Called either from the idle loop or from irq_exit() when an idle period was
* just interrupted by an interrupt which did not cause a reschedule.
*/
-void tick_nohz_stop_sched_tick(void)
+void tick_nohz_stop_sched_tick(int inidle)
{
unsigned long seq, last_jiffies, next_jiffies, delta_jiffies, flags;
struct tick_sched *ts;
if (unlikely(ts->nohz_mode == NOHZ_MODE_INACTIVE))
goto end;
+ if (!inidle && !ts->inidle)
+ goto end;
+
+ ts->inidle = 1;
+
if (need_resched())
goto end;
local_softirq_pending());
ratelimit++;
}
+ goto end;
}
ts->idle_calls++;
local_irq_disable();
tick_nohz_stop_idle(cpu);
- if (!ts->tick_stopped) {
+ if (!ts->inidle || !ts->tick_stopped) {
+ ts->inidle = 0;
local_irq_enable();
return;
}
+ ts->inidle = 0;
+
rcu_exit_nohz();
/* Update jiffies first */