diff options
| author | Ingo Molnar <mingo@elte.hu> | 2007-07-21 04:37:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-21 17:49:15 -0700 |
| commit | 820de5c39ef7f6866d2c9e6c7d208bcd2a6e1942 (patch) | |
| tree | be28af991bb9fa26ece3ffb44b01c7038aa70fa4 | |
| parent | 3704540b48295253bd9c87a5e7ff545f9d47a3b8 (diff) | |
highres: improve debug output
Add some more debug information to the hrtimer and clock events code.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: john stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | arch/i386/kernel/apic.c | 3 | ||||
| -rw-r--r-- | kernel/hrtimer.c | 5 | ||||
| -rw-r--r-- | kernel/time/tick-oneshot.c | 15 |
3 files changed, 21 insertions, 2 deletions
diff --git a/arch/i386/kernel/apic.c b/arch/i386/kernel/apic.c index 610f44b2436..83988c3c8e2 100644 --- a/arch/i386/kernel/apic.c +++ b/arch/i386/kernel/apic.c @@ -524,6 +524,9 @@ void __init setup_boot_APIC_clock(void) */ if (nmi_watchdog != NMI_IO_APIC) lapic_clockevent.features &= ~CLOCK_EVT_FEAT_DUMMY; + else + printk(KERN_WARNING "APIC timer registered as dummy," + " due to nmi_watchdog=1!\n"); } /* Setup the lapic or request the broadcast */ diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index 72d034258ba..065a8978662 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -558,7 +558,8 @@ static inline int hrtimer_enqueue_reprogram(struct hrtimer *timer, */ static int hrtimer_switch_to_hres(void) { - struct hrtimer_cpu_base *base = &__get_cpu_var(hrtimer_bases); + int cpu = smp_processor_id(); + struct hrtimer_cpu_base *base = &per_cpu(hrtimer_bases, cpu); unsigned long flags; if (base->hres_active) @@ -568,6 +569,8 @@ static int hrtimer_switch_to_hres(void) if (tick_init_highres()) { local_irq_restore(flags); + printk(KERN_WARNING "Could not switch to high resolution " + "mode on CPU %d\n", cpu); return 0; } base->hres_active = 1; diff --git a/kernel/time/tick-oneshot.c b/kernel/time/tick-oneshot.c index f6997ab0c3c..0258d3115d5 100644 --- a/kernel/time/tick-oneshot.c +++ b/kernel/time/tick-oneshot.c @@ -73,8 +73,21 @@ int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *)) struct clock_event_device *dev = td->evtdev; if (!dev || !(dev->features & CLOCK_EVT_FEAT_ONESHOT) || - !tick_device_is_functional(dev)) + !tick_device_is_functional(dev)) { + + printk(KERN_INFO "Clockevents: " + "could not switch to one-shot mode:"); + if (!dev) { + printk(" no tick device\n"); + } else { + if (!tick_device_is_functional(dev)) + printk(" %s is not functional.\n", dev->name); + else + printk(" %s does not support one-shot mode.\n", + dev->name); + } return -EINVAL; + } td->mode = TICKDEV_MODE_ONESHOT; dev->event_handler = handler; |