diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/kernel/time/hrtimer.c | 11 | ||||
| -rw-r--r-- | kernel/kernel/time/tick-sched.c | 64 |
2 files changed, 31 insertions, 44 deletions
diff --git a/kernel/kernel/time/hrtimer.c b/kernel/kernel/time/hrtimer.c index 2c6be169b..5d193396e 100644 --- a/kernel/kernel/time/hrtimer.c +++ b/kernel/kernel/time/hrtimer.c @@ -583,6 +583,12 @@ static int hrtimer_reprogram(struct hrtimer *timer, if (hrtimer_callback_running(timer)) return 0; + if (base->cpu_base != cpu_base) + return 0; + + if (cpu_base->in_hrtirq) + return 0; + /* * CLOCK_REALTIME timer might be requested with an absolute * expiry time which is less than base->offset. Nothing wrong @@ -613,12 +619,11 @@ static int hrtimer_reprogram(struct hrtimer *timer, if (cpu_base->hang_detected) return 0; + cpu_base->expires_next = expires; /* * Clockevents returns -ETIME, when the event was in the past. */ - res = tick_program_event(expires, 0); - if (!IS_ERR_VALUE(res)) - cpu_base->expires_next = expires; + res = tick_program_event(expires, 1); return res; } diff --git a/kernel/kernel/time/tick-sched.c b/kernel/kernel/time/tick-sched.c index b3841ba00..f61dbf202 100644 --- a/kernel/kernel/time/tick-sched.c +++ b/kernel/kernel/time/tick-sched.c @@ -576,6 +576,20 @@ u64 get_cpu_iowait_time_us(int cpu, u64 *last_update_time) } EXPORT_SYMBOL_GPL(get_cpu_iowait_time_us); +static void tick_nohz_restart(struct tick_sched *ts, ktime_t now) +{ + hrtimer_cancel(&ts->sched_timer); + hrtimer_set_expires(&ts->sched_timer, ts->last_tick); + + /* Forward the time to expire in the future */ + hrtimer_forward(&ts->sched_timer, now, tick_period); + + if (ts->nohz_mode == NOHZ_MODE_HIGHRES) + hrtimer_start_expires(&ts->sched_timer, HRTIMER_MODE_ABS_PINNED); + else + tick_program_event(hrtimer_get_expires(&ts->sched_timer), 1); +} + static ktime_t tick_nohz_stop_sched_tick(struct tick_sched *ts, ktime_t now, int cpu) { @@ -704,22 +718,16 @@ static ktime_t tick_nohz_stop_sched_tick(struct tick_sched *ts, goto out; } - if (ts->nohz_mode == NOHZ_MODE_HIGHRES) { - hrtimer_start(&ts->sched_timer, expires, - HRTIMER_MODE_ABS_PINNED); - /* Check, if the timer was already in the past */ - if (hrtimer_active(&ts->sched_timer)) - goto out; - } else if (!tick_program_event(expires, 0)) - goto out; - /* - * We are past the event already. So we crossed a - * jiffie boundary. Update jiffies and raise the - * softirq. - */ - tick_do_update_jiffies64(ktime_get()); + if (ts->nohz_mode == NOHZ_MODE_HIGHRES) + hrtimer_start(&ts->sched_timer, expires, + HRTIMER_MODE_ABS_PINNED); + else + tick_program_event(expires, 1); + } else { + /* Tick is stopped, but required now. Enforce it */ + tick_nohz_restart(ts, now); + } - raise_softirq_irqoff(TIMER_SOFTIRQ); out: ts->next_jiffies = next_jiffies; ts->last_jiffies = last_jiffies; @@ -880,32 +888,6 @@ ktime_t tick_nohz_get_sleep_length(void) return ts->sleep_length; } -static void tick_nohz_restart(struct tick_sched *ts, ktime_t now) -{ - hrtimer_cancel(&ts->sched_timer); - hrtimer_set_expires(&ts->sched_timer, ts->last_tick); - - while (1) { - /* Forward the time to expire in the future */ - hrtimer_forward(&ts->sched_timer, now, tick_period); - - if (ts->nohz_mode == NOHZ_MODE_HIGHRES) { - 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; - } else { - if (!tick_program_event( - hrtimer_get_expires(&ts->sched_timer), 0)) - break; - } - /* Reread time and update jiffies */ - now = ktime_get(); - tick_do_update_jiffies64(now); - } -} - static void tick_nohz_restart_sched_tick(struct tick_sched *ts, ktime_t now) { /* Update jiffies first */ |