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author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-31 09:02:51 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-31 09:02:51 -0800 |
commit | aafd9d6a46745926648cb5d0b68b108e79ceb8d4 (patch) | |
tree | b099dece2ff08e57d141af686ffbb24dc663c05b /kernel | |
parent | 595bf999e3a864f40e049c67c42ecee50fb7a78a (diff) | |
parent | a2b4c607c93a0850c8e3d90688cf3bd08576b986 (diff) | |
download | op-kernel-dev-aafd9d6a46745926648cb5d0b68b108e79ceb8d4.zip op-kernel-dev-aafd9d6a46745926648cb5d0b68b108e79ceb8d4.tar.gz |
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer/dynticks updates from Ingo Molnar:
"This tree contains misc dynticks updates: a fix and three cleanups"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/nohz: Fix overflow error in scheduler_tick_max_deferment()
nohz_full: fix code style issue of tick_nohz_full_stop_tick
nohz: Get timekeeping max deferment outside jiffies_lock
tick: Rename tick_check_idle() to tick_irq_enter()
Diffstat (limited to 'kernel')
-rw-r--r-- | kernel/sched/core.c | 2 | ||||
-rw-r--r-- | kernel/softirq.c | 2 | ||||
-rw-r--r-- | kernel/time/tick-sched.c | 27 |
3 files changed, 16 insertions, 15 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 656cd70..b46131e 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2476,7 +2476,7 @@ u64 scheduler_tick_max_deferment(void) if (time_before_eq(next, now)) return 0; - return jiffies_to_usecs(next - now) * NSEC_PER_USEC; + return jiffies_to_nsecs(next - now); } #endif diff --git a/kernel/softirq.c b/kernel/softirq.c index 8509670..490fcbb 100644 --- a/kernel/softirq.c +++ b/kernel/softirq.c @@ -328,7 +328,7 @@ void irq_enter(void) * here, as softirq will be serviced on return from interrupt. */ local_bh_disable(); - tick_check_idle(); + tick_irq_enter(); _local_bh_enable(); } diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 08cb0c3..9f8af69 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -533,12 +533,13 @@ static ktime_t tick_nohz_stop_sched_tick(struct tick_sched *ts, struct clock_event_device *dev = __get_cpu_var(tick_cpu_device).evtdev; u64 time_delta; + time_delta = timekeeping_max_deferment(); + /* Read jiffies and the time when jiffies were updated last */ do { seq = read_seqbegin(&jiffies_lock); last_update = last_jiffies_update; last_jiffies = jiffies; - time_delta = timekeeping_max_deferment(); } while (read_seqretry(&jiffies_lock, seq)); if (rcu_needs_cpu(cpu, &rcu_delta_jiffies) || @@ -678,18 +679,18 @@ out: static void tick_nohz_full_stop_tick(struct tick_sched *ts) { #ifdef CONFIG_NO_HZ_FULL - int cpu = smp_processor_id(); + int cpu = smp_processor_id(); - if (!tick_nohz_full_cpu(cpu) || is_idle_task(current)) - return; + if (!tick_nohz_full_cpu(cpu) || is_idle_task(current)) + return; - if (!ts->tick_stopped && ts->nohz_mode == NOHZ_MODE_INACTIVE) - return; + if (!ts->tick_stopped && ts->nohz_mode == NOHZ_MODE_INACTIVE) + return; - if (!can_stop_full_tick()) - return; + if (!can_stop_full_tick()) + return; - tick_nohz_stop_sched_tick(ts, ktime_get(), cpu); + tick_nohz_stop_sched_tick(ts, ktime_get(), cpu); #endif } @@ -1023,7 +1024,7 @@ static void tick_nohz_kick_tick(struct tick_sched *ts, ktime_t now) #endif } -static inline void tick_check_nohz_this_cpu(void) +static inline void tick_nohz_irq_enter(void) { struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched); ktime_t now; @@ -1042,17 +1043,17 @@ static inline void tick_check_nohz_this_cpu(void) #else static inline void tick_nohz_switch_to_nohz(void) { } -static inline void tick_check_nohz_this_cpu(void) { } +static inline void tick_nohz_irq_enter(void) { } #endif /* CONFIG_NO_HZ_COMMON */ /* * Called from irq_enter to notify about the possible interruption of idle() */ -void tick_check_idle(void) +void tick_irq_enter(void) { tick_check_oneshot_broadcast_this_cpu(); - tick_check_nohz_this_cpu(); + tick_nohz_irq_enter(); } /* |