Re: 48GB NUMA-Q boots, with major IO-APIC hassles

[William Lee Irwin III]

At some point in the past, I wrote:
>> (2) MAX_IO_APIC's got clobbered in the subarch cleanups.
>> 	-- CONFIG_X86_NUMA was removed, use CONFIG_X86_NUMAQ
>> 	-- this is greppable, folks...

On Wed, Jan 15, 2003 at 07:24:40AM -0800, Martin J. Bligh wrote:
> That wasn't the subarch cleanups that removed it, please be careful
> what you're saying. I plead not guilty to that one.

Eh? You aren't doing all of them. I think we both know who did this
one (with good intentions, even).

At some point in the past, I wrote:
>> (4) PCI bridges get misnumbered children.
>> 	-- Brew up a PCI hook for giving child buses their bus numbers.
>> 	-- Basically, fwd port mbligh's fix for 2.4.x more cleanly.
>> 	-- Okay, not IO-APIC-related, but it annoys me greatly.
>> 	-- ink is at least trying to steer me in the right direction here.

On Wed, Jan 15, 2003 at 07:24:40AM -0800, Martin J. Bligh wrote:
> Additional PCI-PCI bridges (eg starfire cards) have never been supported 
> in non-boot quads. It's not impossible, but don't be suprised if it 
> doesn't work.

It should be fine once the bus numbering, io resources, and IO-APIC's
are dealt with. The bus numbering stuff is out there, io resource stuff
is an open question, and IO-APIC stuff looks uglier than sin (as usual).
Basically, a good chunk of rotorooting appears to be necessary to
assign deal with a number of IRQ sources large enough to make
assign_irq_vector() wrap current_vector, possibly something as
invasive as supporting non-unique vectors for irq_desc's.

At some point in the past, I wrote:
>> (5) Booting with notsc panic()'s.
>> 	-- Remove tsc_disable assignment in the __setup() call.
>> 	-- I'd be much obliged if the SMP TSC issues were at long
>> 	-- last conclusively dealt with. Not IO-APIC-related either,
>> 	-- but also very annoying.

On Wed, Jan 15, 2003 at 07:24:40AM -0800, Martin J. Bligh wrote:
> You don't have PIT support compiled in, and you turned off TSC support,
> leaving yourself with no timer. There's a patch in my tree to force on
> PIT support for NUMA-Q.

Sounds like a conclusive answer to the TSC for me.

Cheers,
Bill