diff options
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/ntp.c | 2 | ||||
| -rw-r--r-- | kernel/time/tick-broadcast.c | 17 | ||||
| -rw-r--r-- | kernel/time/tick-sched.c | 12 | ||||
| -rw-r--r-- | kernel/time/timekeeping.c | 10 | ||||
| -rw-r--r-- | kernel/time/timer_stats.c | 5 |
5 files changed, 30 insertions, 16 deletions
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c index cd91237..de6a2d6 100644 --- a/kernel/time/ntp.c +++ b/kernel/time/ntp.c @@ -226,7 +226,7 @@ static void sync_cmos_clock(unsigned long dummy) static void notify_cmos_timer(void) { - if (no_sync_cmos_clock) + if (!no_sync_cmos_clock) mod_timer(&sync_cmos_timer, jiffies + 1); } diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c index db8e0f3..0962e05 100644 --- a/kernel/time/tick-broadcast.c +++ b/kernel/time/tick-broadcast.c @@ -383,11 +383,7 @@ static int tick_broadcast_set_event(ktime_t expires, int force) int tick_resume_broadcast_oneshot(struct clock_event_device *bc) { clockevents_set_mode(bc, CLOCK_EVT_MODE_ONESHOT); - - if(!cpus_empty(tick_broadcast_oneshot_mask)) - tick_broadcast_set_event(ktime_get(), 1); - - return cpu_isset(smp_processor_id(), tick_broadcast_oneshot_mask); + return 0; } /* @@ -549,20 +545,17 @@ void tick_broadcast_switch_to_oneshot(void) */ void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { - struct clock_event_device *bc; unsigned long flags; unsigned int cpu = *cpup; spin_lock_irqsave(&tick_broadcast_lock, flags); - bc = tick_broadcast_device.evtdev; + /* + * Clear the broadcast mask flag for the dead cpu, but do not + * stop the broadcast device! + */ cpu_clear(cpu, tick_broadcast_oneshot_mask); - if (tick_broadcast_device.mode == TICKDEV_MODE_ONESHOT) { - if (bc && cpus_empty(tick_broadcast_oneshot_mask)) - clockevents_set_mode(bc, CLOCK_EVT_MODE_SHUTDOWN); - } - spin_unlock_irqrestore(&tick_broadcast_lock, flags); } diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index b416995..8c3fef1 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -160,6 +160,18 @@ void tick_nohz_stop_sched_tick(void) cpu = smp_processor_id(); ts = &per_cpu(tick_cpu_sched, cpu); + /* + * If this cpu is offline and it is the one which updates + * jiffies, then give up the assignment and let it be taken by + * the cpu which runs the tick timer next. If we don't drop + * this here the jiffies might be stale and do_timer() never + * invoked. + */ + if (unlikely(!cpu_online(cpu))) { + if (cpu == tick_do_timer_cpu) + tick_do_timer_cpu = -1; + } + if (unlikely(ts->nohz_mode == NOHZ_MODE_INACTIVE)) goto end; diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index acc417b..4ad79f6 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -217,6 +217,7 @@ static void change_clocksource(void) } #else static inline void change_clocksource(void) { } +static inline s64 __get_nsec_offset(void) { return 0; } #endif /** @@ -280,6 +281,8 @@ void __init timekeeping_init(void) static int timekeeping_suspended; /* time in seconds when suspend began */ static unsigned long timekeeping_suspend_time; +/* xtime offset when we went into suspend */ +static s64 timekeeping_suspend_nsecs; /** * timekeeping_resume - Resumes the generic timekeeping subsystem. @@ -305,6 +308,8 @@ static int timekeeping_resume(struct sys_device *dev) wall_to_monotonic.tv_sec -= sleep_length; total_sleep_time += sleep_length; } + /* Make sure that we have the correct xtime reference */ + timespec_add_ns(&xtime, timekeeping_suspend_nsecs); /* re-base the last cycle value */ clock->cycle_last = clocksource_read(clock); clock->error = 0; @@ -325,9 +330,12 @@ static int timekeeping_suspend(struct sys_device *dev, pm_message_t state) { unsigned long flags; + timekeeping_suspend_time = read_persistent_clock(); + write_seqlock_irqsave(&xtime_lock, flags); + /* Get the current xtime offset */ + timekeeping_suspend_nsecs = __get_nsec_offset(); timekeeping_suspended = 1; - timekeeping_suspend_time = read_persistent_clock(); write_sequnlock_irqrestore(&xtime_lock, flags); clockevents_notify(CLOCK_EVT_NOTIFY_SUSPEND, NULL); diff --git a/kernel/time/timer_stats.c b/kernel/time/timer_stats.c index 3c38fb5..c36bb7e 100644 --- a/kernel/time/timer_stats.c +++ b/kernel/time/timer_stats.c @@ -327,8 +327,9 @@ static int tstats_show(struct seq_file *m, void *v) ms = 1; if (events && period.tv_sec) - seq_printf(m, "%ld total events, %ld.%ld events/sec\n", events, - events / period.tv_sec, events * 1000 / ms); + seq_printf(m, "%ld total events, %ld.%03ld events/sec\n", + events, events * 1000 / ms, + (events * 1000000 / ms) % 1000); else seq_printf(m, "%ld total events\n", events); |
