Re: [PATCH RFC V10 15/18] kvm : Paravirtual ticketlocks support forlinux guests running on KVM hypervisor

[Peter Zijlstra]

On Tue, Jul 16, 2013 at 09:02:15AM +0300, Gleb Natapov wrote:
> BTW can NMI handler take spinlocks? 

No -- that is, yes you can using trylock, but you still shouldn't.

> If it can what happens if NMI is
> delivered in a section protected by local_irq_save()/local_irq_restore()?

You deadlock.
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