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-rw-r--r--kernel/time/hrtimer.c2
-rw-r--r--kernel/time/tick-sched.c32
-rw-r--r--kernel/time/tick-sched.h13
-rw-r--r--kernel/time/timer_list.c5
4 files changed, 26 insertions, 26 deletions
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index 3e95474199ac..70625dff62ce 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -747,7 +747,7 @@ static void hrtimer_switch_to_hres(void)
base->hres_active = 1;
hrtimer_resolution = HIGH_RES_NSEC;
- tick_setup_sched_timer(NOHZ_MODE_HIGHRES);
+ tick_setup_sched_timer(true);
/* "Retrigger" the interrupt to get things going */
retrigger_next_event(NULL);
}
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 4aa7ce04a72c..dcb9f0394182 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -831,7 +831,7 @@ static void tick_nohz_restart(struct tick_sched *ts, ktime_t now)
/* Forward the time to expire in the future */
hrtimer_forward(&ts->sched_timer, now, TICK_NSEC);
- if (ts->nohz_mode == NOHZ_MODE_HIGHRES) {
+ if (tick_sched_flag_test(ts, TS_FLAG_HIGHRES)) {
hrtimer_start_expires(&ts->sched_timer,
HRTIMER_MODE_ABS_PINNED_HARD);
} else {
@@ -1040,14 +1040,14 @@ static void tick_nohz_stop_tick(struct tick_sched *ts, int cpu)
* the tick timer.
*/
if (unlikely(expires == KTIME_MAX)) {
- if (ts->nohz_mode == NOHZ_MODE_HIGHRES)
+ if (tick_sched_flag_test(ts, TS_FLAG_HIGHRES))
hrtimer_cancel(&ts->sched_timer);
else
tick_program_event(KTIME_MAX, 1);
return;
}
- if (ts->nohz_mode == NOHZ_MODE_HIGHRES) {
+ if (tick_sched_flag_test(ts, TS_FLAG_HIGHRES)) {
hrtimer_start(&ts->sched_timer, expires,
HRTIMER_MODE_ABS_PINNED_HARD);
} else {
@@ -1108,7 +1108,7 @@ static void tick_nohz_full_update_tick(struct tick_sched *ts)
if (!tick_nohz_full_cpu(smp_processor_id()))
return;
- if (ts->nohz_mode == NOHZ_MODE_INACTIVE)
+ if (!tick_sched_flag_test(ts, TS_FLAG_NOHZ))
return;
__tick_nohz_full_update_tick(ts, ktime_get());
@@ -1168,7 +1168,7 @@ static bool can_stop_idle_tick(int cpu, struct tick_sched *ts)
return false;
}
- if (unlikely(ts->nohz_mode == NOHZ_MODE_INACTIVE))
+ if (unlikely(!tick_sched_flag_test(ts, TS_FLAG_NOHZ)))
return false;
if (need_resched())
@@ -1487,11 +1487,11 @@ static void tick_nohz_lowres_handler(struct clock_event_device *dev)
tick_program_event(hrtimer_get_expires(&ts->sched_timer), 1);
}
-static inline void tick_nohz_activate(struct tick_sched *ts, int mode)
+static inline void tick_nohz_activate(struct tick_sched *ts)
{
if (!tick_nohz_enabled)
return;
- ts->nohz_mode = mode;
+ tick_sched_flag_set(ts, TS_FLAG_NOHZ);
/* One update is enough */
if (!test_and_set_bit(0, &tick_nohz_active))
timers_update_nohz();
@@ -1512,7 +1512,7 @@ static void tick_nohz_switch_to_nohz(void)
* Recycle the hrtimer in 'ts', so we can share the
* highres code.
*/
- tick_setup_sched_timer(NOHZ_MODE_LOWRES);
+ tick_setup_sched_timer(false);
}
static inline void tick_nohz_irq_enter(void)
@@ -1540,7 +1540,7 @@ static inline void tick_nohz_irq_enter(void)
static inline void tick_nohz_switch_to_nohz(void) { }
static inline void tick_nohz_irq_enter(void) { }
-static inline void tick_nohz_activate(struct tick_sched *ts, int mode) { }
+static inline void tick_nohz_activate(struct tick_sched *ts) { }
#endif /* CONFIG_NO_HZ_COMMON */
@@ -1567,15 +1567,17 @@ early_param("skew_tick", skew_tick);
* tick_setup_sched_timer - setup the tick emulation timer
* @mode: tick_nohz_mode to setup for
*/
-void tick_setup_sched_timer(int mode)
+void tick_setup_sched_timer(bool hrtimer)
{
struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
/* Emulate tick processing via per-CPU hrtimers: */
hrtimer_init(&ts->sched_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS_HARD);
- if (IS_ENABLED(CONFIG_HIGH_RES_TIMERS) && mode == NOHZ_MODE_HIGHRES)
+ if (IS_ENABLED(CONFIG_HIGH_RES_TIMERS) && hrtimer) {
+ tick_sched_flag_set(ts, TS_FLAG_HIGHRES);
ts->sched_timer.function = tick_nohz_handler;
+ }
/* Get the next period (per-CPU) */
hrtimer_set_expires(&ts->sched_timer, tick_init_jiffy_update());
@@ -1589,11 +1591,11 @@ void tick_setup_sched_timer(int mode)
}
hrtimer_forward_now(&ts->sched_timer, TICK_NSEC);
- if (IS_ENABLED(CONFIG_HIGH_RES_TIMERS) && mode == NOHZ_MODE_HIGHRES)
+ if (IS_ENABLED(CONFIG_HIGH_RES_TIMERS) && hrtimer)
hrtimer_start_expires(&ts->sched_timer, HRTIMER_MODE_ABS_PINNED_HARD);
else
tick_program_event(hrtimer_get_expires(&ts->sched_timer), 1);
- tick_nohz_activate(ts, mode);
+ tick_nohz_activate(ts);
}
void tick_cancel_sched_timer(int cpu)
@@ -1602,7 +1604,7 @@ void tick_cancel_sched_timer(int cpu)
ktime_t idle_sleeptime, iowait_sleeptime;
unsigned long idle_calls, idle_sleeps;
- if (IS_ENABLED(CONFIG_HIGH_RES_TIMERS) && ts->sched_timer.base)
+ if (tick_sched_flag_test(ts, TS_FLAG_HIGHRES))
hrtimer_cancel(&ts->sched_timer);
idle_sleeptime = ts->idle_sleeptime;
@@ -1652,7 +1654,7 @@ int tick_check_oneshot_change(int allow_nohz)
if (!test_and_clear_bit(0, &ts->check_clocks))
return 0;
- if (ts->nohz_mode != NOHZ_MODE_INACTIVE)
+ if (tick_sched_flag_test(ts, TS_FLAG_NOHZ))
return 0;
if (!timekeeping_valid_for_hres() || !tick_is_oneshot_available())
diff --git a/kernel/time/tick-sched.h b/kernel/time/tick-sched.h
index 07a4c0144c47..bbe72a078985 100644
--- a/kernel/time/tick-sched.h
+++ b/kernel/time/tick-sched.h
@@ -14,12 +14,6 @@ struct tick_device {
enum tick_device_mode mode;
};
-enum tick_nohz_mode {
- NOHZ_MODE_INACTIVE,
- NOHZ_MODE_LOWRES,
- NOHZ_MODE_HIGHRES,
-};
-
/* The CPU is in the tick idle mode */
#define TS_FLAG_INIDLE BIT(0)
/* The idle tick has been stopped */
@@ -31,6 +25,10 @@ enum tick_nohz_mode {
#define TS_FLAG_IDLE_ACTIVE BIT(2)
/* CPU was the last one doing do_timer before going idle */
#define TS_FLAG_DO_TIMER_LAST BIT(3)
+/* NO_HZ is enabled */
+#define TS_FLAG_NOHZ BIT(4)
+/* High resolution tick mode */
+#define TS_FLAG_HIGHRES BIT(5)
/**
* struct tick_sched - sched tick emulation and no idle tick control/stats
@@ -84,7 +82,6 @@ struct tick_sched {
ktime_t idle_entrytime;
/* Tick stop */
- enum tick_nohz_mode nohz_mode;
unsigned long last_jiffies;
u64 timer_expires_base;
u64 timer_expires;
@@ -107,7 +104,7 @@ struct tick_sched {
extern struct tick_sched *tick_get_tick_sched(int cpu);
-extern void tick_setup_sched_timer(int mode);
+extern void tick_setup_sched_timer(bool hrtimer);
#if defined CONFIG_NO_HZ_COMMON || defined CONFIG_HIGH_RES_TIMERS
extern void tick_cancel_sched_timer(int cpu);
#else
diff --git a/kernel/time/timer_list.c b/kernel/time/timer_list.c
index 38f81d836fc5..1c311c46da50 100644
--- a/kernel/time/timer_list.c
+++ b/kernel/time/timer_list.c
@@ -152,7 +152,8 @@ static void print_cpu(struct seq_file *m, int cpu, u64 now)
{
struct tick_sched *ts = tick_get_tick_sched(cpu);
- P(nohz_mode);
+ P_flag(nohz, TS_FLAG_NOHZ);
+ P_flag(highres, TS_FLAG_HIGHRES);
P_ns(last_tick);
P_flag(tick_stopped, TS_FLAG_STOPPED);
P(idle_jiffies);
@@ -259,7 +260,7 @@ static void timer_list_show_tickdevices_header(struct seq_file *m)
static inline void timer_list_header(struct seq_file *m, u64 now)
{
- SEQ_printf(m, "Timer List Version: v0.9\n");
+ SEQ_printf(m, "Timer List Version: v0.10\n");
SEQ_printf(m, "HRTIMER_MAX_CLOCK_BASES: %d\n", HRTIMER_MAX_CLOCK_BASES);
SEQ_printf(m, "now at %Ld nsecs\n", (unsigned long long)now);
SEQ_printf(m, "\n");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 23:14:32 +0000