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Re: [Xen-devel] Clock interrupts + hypervisor calls

On 21 Feb 2006, at 07:39, sowmya dayanand wrote:

Hi All,
I wanted to know if a clock interrupt from any of the guest OS  interrupt/preempt a hypervisor call in xen?
Eg: say the disk access hy per call is in progress and a guest OS on another domain generates a clock interrupt, can this interrupt be handled in the middle of the hypervisor call or does it have to wait?

There is no disc access hypercall as Xen does not do I/O itself. Long-lived hypercalls can be voluntarily preempted by events. The hypercall is resumed without the guest needing to do anything special.

 -- Keir

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