[CentOS] Re: smp falls back to up mode on quad core

[Scott Silva]

on 5-28-2008 8:09 AM Julian Echave spake the following:
> Solved it!
> After quite a lot of messing around...
> It turns out i was booting with the acpi=off option, but for the BIOS to 
> see the 4 processors acpi has to be on.
> The problem was that with acpi=on, boot hangs, unless pci=nommconf is 
> added to the boot options.
> 
> To summarize,
> 
> I now boot using the options
> 
> acpi = on pci=nommconf
> 
> Thanks.
> 
> Julian.
Doesn't acpi default to on? So you "should" be able to just have pci=nommconf.


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