Frank,
On Wed, 2007-05-16 at 08:20 +0200, Thomas Gleixner wrote:
> > I have tracked down the offending patch in the series to
> > x86-64-convert-to-clockevents.patch
>
> Not surprising. :)
>
> I'm going to add some early_printks for the next version, so we can get
> an idea where it gets stuck
I went through the relevant changes since the git2-v2 version and the
only thing, which could affect the early boot process is the patch
snippet below.
Can you apply this either to the git2-v2 version and check, if it fails
as well, or reverse apply it to rc1-v4 and check, if the problem goes
away ?
Thanks,
tglx
diff -uprN --exclude-from=/home/tglx/bin/diffit.exclude
linux-2.6.21-git-x86-64/arch/i386/kernel/i8253.c
linux-2.6.21/arch/i386/kernel/i8253.c
--- linux-2.6.21-git-x86-64/arch/i386/kernel/i8253.c 2007-05-16
09:58:01.000000000 +0200
+++ linux-2.6.21/arch/i386/kernel/i8253.c 2007-05-16 09:10:34.000000000
+0200
@@ -29,24 +29,6 @@ EXPORT_SYMBOL(i8253_lock);
*/
struct clock_event_device *global_clock_event;
-/* Status of the PIT interrupt */
-static int pit_irq_disabled;
-
-/*
- * Control pit interrupt enable / disable
- */
-static void pit_control_irq(int disable)
-{
- if (pit_irq_disabled == disable)
- return;
-
- pit_irq_disabled = disable;
- if (disable)
- disable_irq(0);
- else
- enable_irq(0);
-}
-
/*
* Initialize the PIT timer.
*
@@ -65,17 +47,18 @@ static void init_pit_timer(enum clock_ev
outb_p(0x34, PIT_MODE);
outb_p(LATCH & 0xff , PIT_CH0); /* LSB */
outb(LATCH >> 8 , PIT_CH0); /* MSB */
- pit_control_irq(0);
break;
case CLOCK_EVT_MODE_SHUTDOWN:
case CLOCK_EVT_MODE_UNUSED:
- pit_control_irq(1);
+ outb_p(0x30, PIT_MODE);
+ outb_p(0, PIT_CH0); /* LSB */
+ outb_p(0, PIT_CH0); /* MSB */
break;
+
case CLOCK_EVT_MODE_ONESHOT:
/* One shot setup */
outb_p(0x38, PIT_MODE);
- pit_control_irq(0);
break;
case CLOCK_EVT_MODE_RESUME:
@@ -129,7 +112,7 @@ void __init setup_pit_timer(void)
* Start pit with the boot cpu mask and make it global after the
* IO_APIC has been initialized.
*/
- pit_clockevent.cpumask = cpumask_of_cpu(0);
+ pit_clockevent.cpumask = cpumask_of_cpu(smp_processor_id());
pit_clockevent.mult = div_sc(CLOCK_TICK_RATE, NSEC_PER_SEC, 32);
pit_clockevent.max_delta_ns =
clockevent_delta2ns(0x7FFF, &pit_clockevent);
-
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