lkml.org 
[lkml]   [2004]   [Apr]   [13]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: IO-APIC on nforce2
FromLen Brown <>
Date13 Apr 2004 01:08:34 -0400
On Mon, 2004-04-12 at 21:17, Ross Dickson wrote:

> I am working with 2.4.26-rc2 and have noticed a change with the the recent acpi?
> update. The recent fix to stop unnecessary ioapic irq routing entries puts the 
> following if statement into io_apic.c, io_apic_set_pci_routing()
> 
> 	/*
> 	 * IRQs < 16 are already in the irq_2_pin[] map
> 	 */
> 	if (irq >= 16)
> 		add_pin_to_irq(irq, ioapic, pin);
> 
> which prevents my io-apic patch from using that function to reprogram the
> io-apic pin on irq0 from pin2 to pin0. 
> 
> As a quick fix you could drop the "if (irq >= 16)".
> I don't know what harm if any that would do other than create unwanted
> irq mapping entries as in the past.

I made that change -- sorry I broke your patch.
No, I doubt it would matter if you hacked out "if (irq >=16)"
for the time being.
I haven't been following this thread closely, but
http://bugme.osdl.org/show_bug.cgi?id=1203 says I should;-)

I understand that these boards have the timer attached to pin0
in APIC mode, but that the BIOS says it is connected to pin2:

ACPI: INT_SRC_OVR (bus[0] irq[0x0] global_irq[0x2] polarity[0x0]
trigger[0x0])

Wouldn't it be a simpler patch to recognize this board and simply
disable this bogus BIOS INT_SRC_OVR?

Also, what is the symptom of the XT-PIC timer?  Is it the source
of the nForce2 hangs, or something else?  The latest message
suggested that it caused a backround load on the system, but
I don't recall hearing that one on this thread before.

thanks,
-Len


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 14:02    [from the cache]
©2003-2008