5.4=>6.1 regression: nforce2 vs. APIC [+fix]

John Baldwin jhb at freebsd.org
Fri May 19 08:16:43 PDT 2006

On Friday 19 May 2006 10:27, Andriy Gapon wrote:
> [Disclaimer, just in case: I do mean APIC, not ACPI]
> This is a good lesson for me for not trying any RCs or BETAs in due time.
> Short description of my system: nforce2 based motherboard NF-7 v2 with
> the latest BIOS (v2.7), CPU is Athlon XP.
> ...
> Based on that info and the linux patch in that thread I came up with the
> following PCI fixup. Now I am running 6.1 with both APIC and "C1
> disconnect" enabled for 2 days without any problems.

Good find!  The patch looks good.  I've modified it slight to expand
the comment and to make it more paranoid and only trigger for 
bus/slot/function 0/0/0 like the post mentions along with a minor
tweak to the printf.  Can you test to make sure I didn't break anything in the 

John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org

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