[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20090111024642.GA7077@elte.hu>
Date: Sun, 11 Jan 2009 03:46:42 +0100
From: Ingo Molnar <mingo@...e.hu>
To: Jan Beulich <jbeulich@...ell.com>
Cc: tglx@...utronix.de, hpa@...or.com, linux-kernel@...r.kernel.org
Subject: Re: x86: meaning of nolapic command line option
* Jan Beulich <jbeulich@...ell.com> wrote:
> Shouldn't that option imply that all APIC related activity, including
> that relating to IO-APICs or PCI MSI, should be circumvented? I'm
> finding that MSI must be disabled separately, and while most of the
> IO-APIC stuff is indeed not happening, acpi_get_override_irq() only
> checks skip_ioapic_setup, but that doesn't normally set without the
> noapic command line option.
>
> Is there any reason pci_no_msi() and disable_ioapic_setup() shouldn't be
> called when !cpu_has_apic at the end of identify_cpu()?
Yes, both depend on a lapic and they might limp on with whatever the BIOS
gave us, you are right that it should be disabled explicitly. Mind sending
a patch?
Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists