Gleb Natapov wrote:
There may not be a next entry if the guest is in a tight loop. Given NMIs are used for watchdogs, that's not good.

We don't exit a guest after kvm time slice ends?

There are no time slices any more. If there's only once thread for a vcpu, you might have no exits at all with a tickless kernel.

--
Do not meddle in the internals of kernels, for they are subtle and quick to 
panic.

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