On Tue, 2007-09-25 at 15:16 +0200, Rafael J. Wysocki wrote:
> > > There seems to be a history effect in the box, to make things more
> > > "interesting".
> >
> > Did you connect this box to Andrews VAIO during KS ?
>
> No, but it's famous for being interestingly broken nevertheless.
:)
> > > I think the only solid data point so far is that "noapictimer" makes the
> > > box
> > > boot.
> >
> > Ok. Can you add "nmi_watchdog=1" to the command line please. This runs
> > through the calibration of APIC, but registers it as a dummy clock
> > source (the PIT must run to make the watchdog work).
> >
> > If it boots, please provide the output of /proc/timer_list
>
> No, it doesn't.
I start to get desperate. Below is a patch, which moves the apic timer
disable check after the calibration routine. Can you please apply on top
of -hrt and add "noapictimer" to the command line ? Does it boot ?
tglx
Index: linux-2.6.23-rc7/arch/x86_64/kernel/apic.c
===================================================================
--- linux-2.6.23-rc7.orig/arch/x86_64/kernel/apic.c 2007-09-24
20:30:00.000000000 +0200
+++ linux-2.6.23-rc7/arch/x86_64/kernel/apic.c 2007-09-25 15:05:32.000000000
+0200
@@ -927,6 +927,7 @@ static void __init calibrate_APIC_clock(
void __init setup_boot_APIC_clock (void)
{
+#if 0
/*
* The local apic timer can be disabled via the kernel commandline.
* Register the lapic timer as a dummy clock event source on SMP
@@ -940,7 +941,7 @@ void __init setup_boot_APIC_clock (void)
setup_APIC_timer();
return;
}
-
+#endif
printk(KERN_INFO "Using local APIC timer interrupts.\n");
calibrate_APIC_clock();
@@ -949,11 +950,13 @@ void __init setup_boot_APIC_clock (void)
* PIT/HPET going. Otherwise register lapic as a dummy
* device.
*/
- if (nmi_watchdog != NMI_IO_APIC)
+ if (!disable_apic_timer && nmi_watchdog != NMI_IO_APIC)
lapic_clockevent.features &= ~CLOCK_EVT_FEAT_DUMMY;
+#if 0
else
printk(KERN_WARNING "APIC timer registered as dummy,"
" due to nmi_watchdog=1!\n");
+#endif
setup_APIC_timer();
}
-
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