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

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Date:	Mon, 24 Sep 2007 18:46:20 +0200
From:	Thomas Gleixner <tglx@...utronix.de>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Andi Kleen <ak@...e.de>, Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>
Subject: Re: 2.6.23-rc4-mm1 and -rc6-mm1: boot failure on HP nx6325,
	related to clockevents

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 ?

	tglx








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