Re: [PATCH] x86: enable x2apic early at the first point

[Ingo Molnar]

* Gleb Natapov <gleb@xxxxxxxxxx> wrote:

> > > I will post couple of patches, which revert's Gleb's patch 
> > > and another fix for the early boot failure issue, 
> > > tomorrow.
> 
> If you'll revert my patch it will not be possible to use 
> x2apic in KVM (at least without KVM implementing interrupt 
> remapping which is unneeded otherwise) and x2apic interface is 
> much better for vitalization. Instead of reverting the patch 
> it will be better to add check if x2apic can be used without 
> intr-remmaping (all CPUs belong to cluster 0) or allow 
> enabling of x2apic without IR if running as a guest.

yep, that would be required - because your patch can break real 
systems right now. Mind sending me a fix for it?

I've applied Yinghai's fix as well, so please base it on latest 
tip:master.

	Ingo
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