diff options
Diffstat (limited to 'kernel/time')
-rw-r--r-- | kernel/time/clocksource.c | 30 | ||||
-rw-r--r-- | kernel/time/tick-broadcast.c | 2 | ||||
-rw-r--r-- | kernel/time/tick-common.c | 4 | ||||
-rw-r--r-- | kernel/time/tick-oneshot.c | 2 | ||||
-rw-r--r-- | kernel/time/tick-sched.c | 6 |
5 files changed, 33 insertions, 11 deletions
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c index 7f60097..73961f3 100644 --- a/kernel/time/clocksource.c +++ b/kernel/time/clocksource.c @@ -141,8 +141,16 @@ static void clocksource_watchdog(unsigned long data) } if (!list_empty(&watchdog_list)) { - __mod_timer(&watchdog_timer, - watchdog_timer.expires + WATCHDOG_INTERVAL); + /* + * Cycle through CPUs to check if the CPUs stay + * synchronized to each other. + */ + int next_cpu = next_cpu(raw_smp_processor_id(), cpu_online_map); + + if (next_cpu >= NR_CPUS) + next_cpu = first_cpu(cpu_online_map); + watchdog_timer.expires += WATCHDOG_INTERVAL; + add_timer_on(&watchdog_timer, next_cpu); } spin_unlock(&watchdog_lock); } @@ -164,7 +172,8 @@ static void clocksource_check_watchdog(struct clocksource *cs) if (!started && watchdog) { watchdog_last = watchdog->read(); watchdog_timer.expires = jiffies + WATCHDOG_INTERVAL; - add_timer(&watchdog_timer); + add_timer_on(&watchdog_timer, + first_cpu(cpu_online_map)); } } else { if (cs->flags & CLOCK_SOURCE_IS_CONTINUOUS) @@ -185,7 +194,8 @@ static void clocksource_check_watchdog(struct clocksource *cs) watchdog_last = watchdog->read(); watchdog_timer.expires = jiffies + WATCHDOG_INTERVAL; - add_timer(&watchdog_timer); + add_timer_on(&watchdog_timer, + first_cpu(cpu_online_map)); } } } @@ -222,6 +232,18 @@ void clocksource_resume(void) } /** + * clocksource_touch_watchdog - Update watchdog + * + * Update the watchdog after exception contexts such as kgdb so as not + * to incorrectly trip the watchdog. + * + */ +void clocksource_touch_watchdog(void) +{ + clocksource_resume_watchdog(); +} + +/** * clocksource_get_next - Returns the selected clocksource * */ diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c index e1bd50cb..fdfa0c7 100644 --- a/kernel/time/tick-broadcast.c +++ b/kernel/time/tick-broadcast.c @@ -14,7 +14,7 @@ #include <linux/cpu.h> #include <linux/err.h> #include <linux/hrtimer.h> -#include <linux/irq.h> +#include <linux/interrupt.h> #include <linux/percpu.h> #include <linux/profile.h> #include <linux/sched.h> diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c index 1bea399..4f38865 100644 --- a/kernel/time/tick-common.c +++ b/kernel/time/tick-common.c @@ -14,12 +14,14 @@ #include <linux/cpu.h> #include <linux/err.h> #include <linux/hrtimer.h> -#include <linux/irq.h> +#include <linux/interrupt.h> #include <linux/percpu.h> #include <linux/profile.h> #include <linux/sched.h> #include <linux/tick.h> +#include <asm/irq_regs.h> + #include "tick-internal.h" /* diff --git a/kernel/time/tick-oneshot.c b/kernel/time/tick-oneshot.c index 0258d31..450c049 100644 --- a/kernel/time/tick-oneshot.c +++ b/kernel/time/tick-oneshot.c @@ -14,7 +14,7 @@ #include <linux/cpu.h> #include <linux/err.h> #include <linux/hrtimer.h> -#include <linux/irq.h> +#include <linux/interrupt.h> #include <linux/percpu.h> #include <linux/profile.h> #include <linux/sched.h> diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 686da82..69dba0c 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -158,9 +158,8 @@ void tick_nohz_stop_idle(int cpu) } } -static ktime_t tick_nohz_start_idle(int cpu) +static ktime_t tick_nohz_start_idle(struct tick_sched *ts) { - struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu); ktime_t now, delta; now = ktime_get(); @@ -201,8 +200,8 @@ void tick_nohz_stop_sched_tick(void) local_irq_save(flags); cpu = smp_processor_id(); - now = tick_nohz_start_idle(cpu); ts = &per_cpu(tick_cpu_sched, cpu); + now = tick_nohz_start_idle(ts); /* * If this cpu is offline and it is the one which updates @@ -222,7 +221,6 @@ void tick_nohz_stop_sched_tick(void) if (need_resched()) goto end; - cpu = smp_processor_id(); if (unlikely(local_softirq_pending())) { static int ratelimit; |