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Merge branch 'timers/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

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* 'timers/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: add PCI ID for 6300ESB force hpet
  x86: add another PCI ID for ICH6 force-hpet
  kernel-paramaters: document pmtmr= command line option
  acpi_pm clccksource: fix printk format warning
  nohz: don't stop idle tick if softirqs are pending.
  pmtmr: allow command line override of ioport
  nohz: reduce jiffies polling overhead
  hrtimer: Remove unused variables in ktime_divns()
  hrtimer: remove warning in hres_timers_resume
  posix-timers: print RT watchdog message
This commit is contained in:
Linus Torvalds
2008-07-15 10:39:57 -07:00
parent 61d97f4fcf 7dc9719682
commit da6e88f496
6 changed files with 38 additions and 5 deletions
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7
kernel/hrtimer.c
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@ -300,11 +300,10 @@ EXPORT_SYMBOL_GPL(ktime_sub_ns);
*/
u64 ktime_divns(const ktime_t kt, s64 div)
{
u64 dclc, inc, dns;
u64 dclc;
int sft = 0;
dclc = dns = ktime_to_ns(kt);
inc = div;
dclc = ktime_to_ns(kt);
/* Make sure the divisor is less than 2^32: */
while (div >> 32) {
sft++;
@ -632,8 +631,6 @@ void clock_was_set(void)
*/
void hres_timers_resume(void)
{
WARN_ON_ONCE(num_online_cpus() > 1);
/* Retrigger the CPU local events: */
retrigger_next_event(NULL);
}

3
kernel/posix-cpu-timers.c
View File

@ -1037,6 +1037,9 @@ static void check_thread_timers(struct task_struct *tsk,
sig->rlim[RLIMIT_RTTIME].rlim_cur +=
USEC_PER_SEC;
}
printk(KERN_INFO
"RT Watchdog Timeout: %s[%d]\n",
tsk->comm, task_pid_nr(tsk));
__group_send_sig_info(SIGXCPU, SEND_SIG_PRIV, tsk);
}
}

8
kernel/time/tick-sched.c
View File

@ -48,6 +48,13 @@ static void tick_do_update_jiffies64(ktime_t now)
unsigned long ticks = 0;
ktime_t delta;
/*
* Do a quick check without holding xtime_lock:
*/
delta = ktime_sub(now, last_jiffies_update);
if (delta.tv64 < tick_period.tv64)
return;
/* Reevalute with xtime_lock held */
write_seqlock(&xtime_lock);
@ -228,6 +235,7 @@ void tick_nohz_stop_sched_tick(void)
local_softirq_pending());
ratelimit++;
}
goto end;
}
ts->idle_calls++;