Re: [patch] enabling APIC and NMI watchdog on UP systems

[Keir Fraser]

> what is wrong with clearing the first performance counter before using it?
> The NMI oopser is completely nonintrusive.
> 
> so on UP systems you'll have to choose between the NMI oopser and other
> uses of the first counter. You can save/restore the contents of the first
> counter if you want to reactivate the NMI oopser. This is all user-space
> policy, the kernel doesnt mind.

Thanks for the info: I'd entirely forgotten about the inter-APIC comms
bus. That given, I have no problem with clearing the perfctr before
use. The NMI oopser has saved my bacon on more than one occasion :)

 -- Keir
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