Re: 2.6.9-rc4 No local APIC present or hardware disabled

[Mikael Pettersson]

Maciej W. Rozycki writes:
 > > I agree with Alan that accusing the BIOS of being buggy is unwarranted.
 > 
 >  I disagree.  If the firmware performs any actions on hardware without
 > asking the OS for permission, it *must* be prepared for it to be in any
 > possible state and handle it correctly, including any transitional states
 > (as it does respect spinlocks).  Otherwise it's buggy.

But in this case the BIOS explicitly disabled the local APIC. It may
have a legitimate reason for doing so (e.g. old #SMM code), so if the
Linux kernel overrides that disablement and things break, it really is
the kernel's fault not the BIOS'.

 > patch-2.6.9-lapic-7

I'm Ok with this patch.

/Mikael
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