Re: 2.6.23-rc4-mm1 and -rc6-mm1: boot failure on HP nx6325,related to clockevents

From: Thomas Gleixner
Date: Mon Sep 24 2007 - 12:49:46 EST

On Mon, 2007-09-24 at 17:18 +0200, Rafael J. Wysocki wrote:
> > > Well, "noacpi" seems to be a synonym for "pci=noacpi".
> > >
> > > Anyway, it causes acpi_disable_pci() to be executed, which according to
> > > Documentation/kernel-parameters.txt means "Do not use ACPI for IRQ routing or
> > > for PCI scanning" (it works like this on x86_64 too, although the doc says it's
> > > x86_32-specific).
> >
> > Hrm. The local apic timer calibration does not use anything which is
> > related to interrupts, but if we use the local APIC timer we switch off
> > PIT.
> >
> > Can you boot Linus latest (w/o hrt patches) and add "apicmaintimer" to
> > the kernel command line please ?
> Works, dmesg attached.

/me scratches head

We know, that
- disabling local apic timers work
- local apic timers (which turn off PIT) work. when noacpiFSCKEDPARSING
is given on the kernel command line.

I have no clue, what might be the difference of noacpiFSCKEDPARSING. The
boot log is not giving any hint at all.

acpi_disable_pci() sets acpi_pci_disabled and acpi_noirq to 1.

What happens, if you set "acpi=noirq" instead ?


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