diff options
author | Thomas Gleixner <tglx@linutronix.de> | 2008-10-17 10:04:34 +0200 |
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committer | Thomas Gleixner <tglx@apollo.(none)> | 2008-10-17 18:13:38 +0200 |
commit | c34bec5a44e9486597d78e7a686b2f9088a0564c (patch) | |
tree | dd538560814ea54ce8d3f46b935dd24127fba04e /kernel/time/tick-sched.c | |
parent | 719254faa17ffedc87ba0fadb9b34e535c9758d5 (diff) | |
download | kernel_samsung_espresso10-c34bec5a44e9486597d78e7a686b2f9088a0564c.zip kernel_samsung_espresso10-c34bec5a44e9486597d78e7a686b2f9088a0564c.tar.gz kernel_samsung_espresso10-c34bec5a44e9486597d78e7a686b2f9088a0564c.tar.bz2 |
NOHZ: split tick_nohz_restart_sched_tick()
Split out the clock event device reprogramming. Preparatory
patch.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/time/tick-sched.c')
-rw-r--r-- | kernel/time/tick-sched.c | 49 |
1 files changed, 27 insertions, 22 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index fdcf3f9..7aedf43 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -377,6 +377,32 @@ 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); + ts->sched_timer.expires = ts->idle_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(&ts->sched_timer, + ts->sched_timer.expires, + HRTIMER_MODE_ABS); + /* Check, if the timer was already in the past */ + if (hrtimer_active(&ts->sched_timer)) + break; + } else { + if (!tick_program_event(ts->sched_timer.expires, 0)) + break; + } + /* Update jiffies and reread time */ + tick_do_update_jiffies64(now); + now = ktime_get(); + } +} + /** * tick_nohz_restart_sched_tick - restart the idle tick from the idle task * @@ -430,28 +456,7 @@ void tick_nohz_restart_sched_tick(void) */ ts->tick_stopped = 0; ts->idle_exittime = now; - hrtimer_cancel(&ts->sched_timer); - ts->sched_timer.expires = ts->idle_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(&ts->sched_timer, - ts->sched_timer.expires, - HRTIMER_MODE_ABS); - /* Check, if the timer was already in the past */ - if (hrtimer_active(&ts->sched_timer)) - break; - } else { - if (!tick_program_event(ts->sched_timer.expires, 0)) - break; - } - /* Update jiffies and reread time */ - tick_do_update_jiffies64(now); - now = ktime_get(); - } + tick_nohz_restart(ts, now); local_irq_enable(); } |