nohz: reduce jiffies polling overhead (7a14ce1d) · Commits · e / devices / android_kernel_teracube_2e

kernel/time/tick-sched.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -48,6 +48,13 @@ static void tick_do_update_jiffies64(ktime_t now)
		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);