Re: [PATCH] Intel Alder IOAPIC fix

[Linus Torvalds]

On Sun, 11 Jan 2004, James Bottomley wrote:
>
> The intel alder motherboard really dislikes the way the current kernel
> reassigns all PCI resources.  It exports 6 memory bars from its Extended
> Express System Support Controller, but if the system touches any of
> them, it disables the secondary IO-APIC.
> 
> The system is bootable if you disable all IO-APICs apart from the
> primary, but it does become a bit crowded in interrupt space.  The patch
> fixes the problem by adding a quirk to clear the first six memory bars.

What are the BAR contents? In particular, maybe the right fix is to add a 
flag to say "don't touch" - but leave the BAR contents there, so that 
the resource manager can actually see what the resources actually are..

		Linus
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