Xen devel - Sep 2008 - Page fault handler preemptable?

Sorry for such a basic question... but is the page fault handler
routine in the hypervisor preemptable?  For example, let''s say guest
domain A is being live migrated.  As it''s running, a page fault
occurs.  Can the page fault handler be preempted in the middle by say
the live migration process in dom0?

Thanks,
Mike

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>From: Mike Sun
>Sent: 2008年9月24日 5:04
>
>Sorry for such a basic question... but is the page fault handler
>routine in the hypervisor preemptable?  For example, let's say guest
>domain A is being live migrated.  As it's running, a page fault
>occurs.  Can the page fault handler be preempted in the middle by say
>the live migration process in dom0?
>
No. Xen itself is not preemptive, and schedule only happens in
the boundary just before returning to guest context.

Thanks,
Kevin

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