Re: [RFC][PATCH v2 4/7] taskstats: Add per task steal time accounting

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On 11/16/2010 06:43 PM, Peter Zijlstra wrote:

No.  Hypercalls are voluntary and known, but most exits are involuntary
and unknown to the guest.  Any memory access can generate a page fault,
and any host interrupt will exit the guest.
Right, but we could not make the guest jump to a special stub on vcpu
enter? I guess we could simply because we have the hypervisor under
control.

No, some entries inject an interrupt or exception, so the next rip value is unknown (without doing a lot of extra slow calculations).
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