From: Chris Lawrence <cnlawren-otVW4P3Rl+RCuWAPc0MYQg@public.gmane.org>
To: Jan Rychter <jan-JAsPCFd0eodBDgjK7y7TUQ@public.gmane.org>
Cc: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: Re: Toshiba Dynabook S7 ACPI problems
Date: 22 Jul 2003 22:06:18 -0400 [thread overview]
Message-ID: <1058925977.1255.7.camel@satellite> (raw)
In-Reply-To: <m2wuem8g1i.fsf-dTJq59+VGzkkCw8IV3R6h0EOCMrvLtNR@public.gmane.org>
On Sun, 2003-07-13 at 13:58, Jan Rychter wrote:
> 4. I don't know if this is ACPI's fault, but it seems all devices want to
> sit on the same IRQ:
>
> ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 10 *11)
> ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 10 *11)
> ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 7 10 *11)
> ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 7 10 *11)
> ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 10 *11)
> ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 7 10 *11)
> ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 7 10 *11)
> ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 7 10 *11)
This is common on systems that are (mostly) legacy-free like my Toshiba
laptop; the ACPI IRQ balancing code tries to avoid putting PCI
interrupts on lines that legacy ISA devices use. If you modify
drivers/acpi/pci_link.c (look for the "penalty" table) you can make the
IRQ allocation saner (there probably ought to be a kernel argument to
adjust the penalty table, or at least something that will de-penalize
legacy system IRQs).
Chris
--
Chris Lawrence <cnlawren-otVW4P3Rl+RCuWAPc0MYQg@public.gmane.org>
Department of Physics and Astronomy, University of Mississippi
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prev parent reply other threads:[~2003-07-23 2:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-13 17:58 Toshiba Dynabook S7 ACPI problems Jan Rychter
[not found] ` <m2wuem8g1i.fsf-dTJq59+VGzkkCw8IV3R6h0EOCMrvLtNR@public.gmane.org>
2003-07-23 2:06 ` Chris Lawrence [this message]
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