diff options
| author | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2007-05-30 23:57:05 -0500 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2007-05-30 23:57:05 -0500 |
| commit | 5bc65793cbf8da0d35f19ef025dda22887e79e80 (patch) | |
| tree | 8291998abd73055de6f487fafa174ee2a5d3afee /kernel/time | |
| parent | 6edae708bf77e012d855a7e2c7766f211d234f4f (diff) | |
| parent | 3f0a6766e0cc5a577805732e5adb50a585c58175 (diff) | |
[SCSI] Merge up to linux-2.6 head
Conflicts:
drivers/scsi/jazz_esp.c
Same changes made by both SCSI and SPARC trees: problem with UTF-8
conversion in the copyright.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/ntp.c | 2 | ||||
| -rw-r--r-- | kernel/time/tick-broadcast.c | 17 | ||||
| -rw-r--r-- | kernel/time/tick-sched.c | 28 |
3 files changed, 38 insertions, 9 deletions
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c index cb25649c6f50..87aa5ff931e0 100644 --- a/kernel/time/ntp.c +++ b/kernel/time/ntp.c @@ -11,6 +11,8 @@ #include <linux/mm.h> #include <linux/time.h> #include <linux/timex.h> +#include <linux/jiffies.h> +#include <linux/hrtimer.h> #include <asm/div64.h> #include <asm/timex.h> diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c index eadfce2fff74..8001d37071f5 100644 --- a/kernel/time/tick-broadcast.c +++ b/kernel/time/tick-broadcast.c @@ -243,11 +243,18 @@ void tick_broadcast_on_off(unsigned long reason, int *oncpu) { int cpu = get_cpu(); - if (cpu == *oncpu) - tick_do_broadcast_on_off(&reason); - else - smp_call_function_single(*oncpu, tick_do_broadcast_on_off, - &reason, 1, 1); + if (!cpu_isset(*oncpu, cpu_online_map)) { + printk(KERN_ERR "tick-braodcast: ignoring broadcast for " + "offline CPU #%d\n", *oncpu); + } else { + + if (cpu == *oncpu) + tick_do_broadcast_on_off(&reason); + else + smp_call_function_single(*oncpu, + tick_do_broadcast_on_off, + &reason, 1, 1); + } put_cpu(); } diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 3483e6cb9549..52db9e3c526e 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -167,9 +167,15 @@ void tick_nohz_stop_sched_tick(void) goto end; cpu = smp_processor_id(); - if (unlikely(local_softirq_pending())) - printk(KERN_ERR "NOHZ: local_softirq_pending %02x\n", - local_softirq_pending()); + if (unlikely(local_softirq_pending())) { + static int ratelimit; + + if (ratelimit < 10) { + printk(KERN_ERR "NOHZ: local_softirq_pending %02x\n", + local_softirq_pending()); + ratelimit++; + } + } now = ktime_get(); /* @@ -241,6 +247,21 @@ void tick_nohz_stop_sched_tick(void) if (cpu == tick_do_timer_cpu) tick_do_timer_cpu = -1; + ts->idle_sleeps++; + + /* + * delta_jiffies >= NEXT_TIMER_MAX_DELTA signals that + * there is no timer pending or at least extremly far + * into the future (12 days for HZ=1000). In this case + * we simply stop the tick timer: + */ + if (unlikely(delta_jiffies >= NEXT_TIMER_MAX_DELTA)) { + ts->idle_expires.tv64 = KTIME_MAX; + if (ts->nohz_mode == NOHZ_MODE_HIGHRES) + hrtimer_cancel(&ts->sched_timer); + goto out; + } + /* * calculate the expiry time for the next timer wheel * timer @@ -248,7 +269,6 @@ void tick_nohz_stop_sched_tick(void) expires = ktime_add_ns(last_update, tick_period.tv64 * delta_jiffies); ts->idle_expires = expires; - ts->idle_sleeps++; if (ts->nohz_mode == NOHZ_MODE_HIGHRES) { hrtimer_start(&ts->sched_timer, expires, |