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-rw-r--r--kernel/time/clocksource.c28
-rw-r--r--kernel/time/ntp.c23
-rw-r--r--kernel/time/tick-broadcast.c2
-rw-r--r--kernel/time/tick-common.c4
-rw-r--r--kernel/time/tick-oneshot.c2
-rw-r--r--kernel/time/tick-sched.c5
-rw-r--r--kernel/time/timekeeping.c10
-rw-r--r--kernel/time/timer_list.c4
8 files changed, 51 insertions, 27 deletions
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index 548c436..f61402b 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -141,13 +141,8 @@ static void clocksource_watchdog(unsigned long data)
}
if (!list_empty(&watchdog_list)) {
- /* 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);
+ __mod_timer(&watchdog_timer,
+ watchdog_timer.expires + WATCHDOG_INTERVAL);
}
spin_unlock(&watchdog_lock);
}
@@ -169,7 +164,7 @@ static void clocksource_check_watchdog(struct clocksource *cs)
if (!started && watchdog) {
watchdog_last = watchdog->read();
watchdog_timer.expires = jiffies + WATCHDOG_INTERVAL;
- add_timer_on(&watchdog_timer, first_cpu(cpu_online_map));
+ add_timer(&watchdog_timer);
}
} else {
if (cs->flags & CLOCK_SOURCE_IS_CONTINUOUS)
@@ -179,7 +174,7 @@ static void clocksource_check_watchdog(struct clocksource *cs)
if (watchdog)
del_timer(&watchdog_timer);
watchdog = cs;
- init_timer_deferrable(&watchdog_timer);
+ init_timer(&watchdog_timer);
watchdog_timer.function = clocksource_watchdog;
/* Reset watchdog cycles */
@@ -190,8 +185,7 @@ static void clocksource_check_watchdog(struct clocksource *cs)
watchdog_last = watchdog->read();
watchdog_timer.expires =
jiffies + WATCHDOG_INTERVAL;
- add_timer_on(&watchdog_timer,
- first_cpu(cpu_online_map));
+ add_timer(&watchdog_timer);
}
}
}
@@ -228,6 +222,18 @@ 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/ntp.c b/kernel/time/ntp.c
index c88b591..5fd9b94 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -42,12 +42,13 @@ long time_esterror = NTP_PHASE_LIMIT; /* estimated error (us) */
long time_freq; /* frequency offset (scaled ppm)*/
static long time_reftime; /* time at last adjustment (s) */
long time_adjust;
+static long ntp_tick_adj;
static void ntp_update_frequency(void)
{
u64 second_length = (u64)(tick_usec * NSEC_PER_USEC * USER_HZ)
<< TICK_LENGTH_SHIFT;
- second_length += (s64)CLOCK_TICK_ADJUST << TICK_LENGTH_SHIFT;
+ second_length += (s64)ntp_tick_adj << TICK_LENGTH_SHIFT;
second_length += (s64)time_freq << (TICK_LENGTH_SHIFT - SHIFT_NSEC);
tick_length_base = second_length;
@@ -342,14 +343,16 @@ int do_adjtimex(struct timex *txc)
freq_adj = shift_right(freq_adj, time_constant * 2 +
(SHIFT_PLL + 2) * 2 - SHIFT_NSEC);
if (mtemp >= MINSEC && (time_status & STA_FLL || mtemp > MAXSEC)) {
+ u64 utemp64;
temp64 = time_offset << (SHIFT_NSEC - SHIFT_FLL);
if (time_offset < 0) {
- temp64 = -temp64;
- do_div(temp64, mtemp);
- freq_adj -= temp64;
+ utemp64 = -temp64;
+ do_div(utemp64, mtemp);
+ freq_adj -= utemp64;
} else {
- do_div(temp64, mtemp);
- freq_adj += temp64;
+ utemp64 = temp64;
+ do_div(utemp64, mtemp);
+ freq_adj += utemp64;
}
}
freq_adj += time_freq;
@@ -400,3 +403,11 @@ leave: if ((time_status & (STA_UNSYNC|STA_CLOCKERR)) != 0)
notify_cmos_timer();
return(result);
}
+
+static int __init ntp_tick_adj_setup(char *str)
+{
+ ntp_tick_adj = simple_strtol(str, NULL, 0);
+ return 1;
+}
+
+__setup("ntp_tick_adj=", ntp_tick_adj_setup);
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 fa9bb73..686da82 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -282,6 +282,7 @@ void tick_nohz_stop_sched_tick(void)
ts->idle_tick = ts->sched_timer.expires;
ts->tick_stopped = 1;
ts->idle_jiffies = last_jiffies;
+ rcu_enter_nohz();
}
/*
@@ -375,6 +376,8 @@ void tick_nohz_restart_sched_tick(void)
return;
}
+ rcu_exit_nohz();
+
/* Update jiffies first */
select_nohz_load_balancer(0);
now = ktime_get();
@@ -637,7 +640,7 @@ void tick_cancel_sched_timer(int cpu)
if (ts->sched_timer.base)
hrtimer_cancel(&ts->sched_timer);
- ts->tick_stopped = 0;
+
ts->nohz_mode = NOHZ_MODE_INACTIVE;
}
#endif /* HIGH_RES_TIMERS */
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 1af9fb0..a3fa587 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -187,13 +187,16 @@ static void change_clocksource(void)
clock->error = 0;
clock->xtime_nsec = 0;
- clocksource_calculate_interval(clock,
- (unsigned long)(current_tick_length()>>TICK_LENGTH_SHIFT));
+ clocksource_calculate_interval(clock, NTP_INTERVAL_LENGTH);
tick_clock_notify();
+ /*
+ * We're holding xtime lock and waking up klogd would deadlock
+ * us on enqueue. So no printing!
printk(KERN_INFO "Time: %s clocksource has been installed.\n",
clock->name);
+ */
}
#else
static inline void change_clocksource(void) { }
@@ -245,8 +248,7 @@ void __init timekeeping_init(void)
ntp_clear();
clock = clocksource_get_next();
- clocksource_calculate_interval(clock,
- (unsigned long)(current_tick_length()>>TICK_LENGTH_SHIFT));
+ clocksource_calculate_interval(clock, NTP_INTERVAL_LENGTH);
clock->cycle_last = clocksource_read(clock);
xtime.tv_sec = sec;
diff --git a/kernel/time/timer_list.c b/kernel/time/timer_list.c
index d3d94c1..67fe8fc 100644
--- a/kernel/time/timer_list.c
+++ b/kernel/time/timer_list.c
@@ -65,9 +65,9 @@ print_timer(struct seq_file *m, struct hrtimer *timer, int idx, u64 now)
SEQ_printf(m, ", %s/%d", tmp, timer->start_pid);
#endif
SEQ_printf(m, "\n");
- SEQ_printf(m, " # expires at %Lu nsecs [in %Lu nsecs]\n",
+ SEQ_printf(m, " # expires at %Lu nsecs [in %Ld nsecs]\n",
(unsigned long long)ktime_to_ns(timer->expires),
- (unsigned long long)(ktime_to_ns(timer->expires) - now));
+ (long long)(ktime_to_ns(timer->expires) - now));
}
static void
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