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Commit 5c333864 authored by Arun R Bharadwaj's avatar Arun R Bharadwaj Committed by Thomas Gleixner
Browse files

timers: Identifying the existing pinned timers 



* Arun R Bharadwaj <arun@linux.vnet.ibm.com> [2009-04-16 12:11:36]:

The following pinned hrtimers have been identified and marked:
1)sched_rt_period_timer
2)tick_sched_timer
3)stack_trace_timer_fn

[ tglx: fixup the hrtimer pinned mode ]

Signed-off-by: default avatarArun R Bharadwaj <arun@linux.vnet.ibm.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 597d0275

arch/x86/kernel/apic/x2apic_uv_x.c

+1 −1
Original line number Diff line number Diff line
@@ -463,7 +463,7 @@ static void uv_heartbeat(unsigned long ignored) 
	uv_set_scir_bits(bits);



	/* enable next timer period */

	mod_timer(timer, jiffies + SCIR_CPU_HB_INTERVAL);

	mod_timer_pinned(timer, jiffies + SCIR_CPU_HB_INTERVAL);

}



static void __cpuinit uv_heartbeat_enable(int cpu)

kernel/sched.c

+2 −2
Original line number Diff line number Diff line
@@ -244,7 +244,7 @@ static void start_rt_bandwidth(struct rt_bandwidth *rt_b) 
		hard = hrtimer_get_expires(&rt_b->rt_period_timer);

		delta = ktime_to_ns(ktime_sub(hard, soft));

		__hrtimer_start_range_ns(&rt_b->rt_period_timer, soft, delta,

				HRTIMER_MODE_ABS, 0);

				HRTIMER_MODE_ABS_PINNED, 0);

	}

	spin_unlock(&rt_b->rt_runtime_lock);

}
@@ -1154,7 +1154,7 @@ static __init void init_hrtick(void) 
static void hrtick_start(struct rq *rq, u64 delay)

{

	__hrtimer_start_range_ns(&rq->hrtick_timer, ns_to_ktime(delay), 0,

			HRTIMER_MODE_REL, 0);

			HRTIMER_MODE_REL_PINNED, 0);

}



static inline void init_hrtick(void)

kernel/time/tick-sched.c

+4 −3
Original line number Diff line number Diff line
@@ -349,7 +349,7 @@ void tick_nohz_stop_sched_tick(int inidle) 


		if (ts->nohz_mode == NOHZ_MODE_HIGHRES) {

			hrtimer_start(&ts->sched_timer, expires,

				      HRTIMER_MODE_ABS);

				      HRTIMER_MODE_ABS_PINNED);

			/* Check, if the timer was already in the past */

			if (hrtimer_active(&ts->sched_timer))

				goto out;
@@ -395,7 +395,7 @@ static void tick_nohz_restart(struct tick_sched *ts, ktime_t now) 


		if (ts->nohz_mode == NOHZ_MODE_HIGHRES) {

			hrtimer_start_expires(&ts->sched_timer,

				      HRTIMER_MODE_ABS);

					      HRTIMER_MODE_ABS_PINNED);

			/* Check, if the timer was already in the past */

			if (hrtimer_active(&ts->sched_timer))

				break;
@@ -698,7 +698,8 @@ void tick_setup_sched_timer(void) 


	for (;;) {

		hrtimer_forward(&ts->sched_timer, now, tick_period);

		hrtimer_start_expires(&ts->sched_timer, HRTIMER_MODE_ABS);

		hrtimer_start_expires(&ts->sched_timer,

				      HRTIMER_MODE_ABS_PINNED);

		/* Check, if the timer was already in the past */

		if (hrtimer_active(&ts->sched_timer))

			break;

kernel/trace/trace_sysprof.c

+2 −1
Original line number Diff line number Diff line
@@ -203,7 +203,8 @@ static void start_stack_timer(void *unused) 
	hrtimer_init(hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);

	hrtimer->function = stack_trace_timer_fn;



	hrtimer_start(hrtimer, ns_to_ktime(sample_period), HRTIMER_MODE_REL);

	hrtimer_start(hrtimer, ns_to_ktime(sample_period),

		      HRTIMER_MODE_REL_PINNED);

}



static void start_stack_timers(void)