[Xen-devel] how page faults are handled in paravirtualized xen guests?

[weiming <zephyr.zhao@xxxxxxxxx>]

Hi,

I got contradicted information about the path of page fault handling under para-virtualized linux:

1) From some web resources: page fault interruption is trapped by xen hypervisor and it then dispatches to corresponding guest OS
2) From the book "a definitive guide to xen hypervisor": when a guest is scheduled to run by hypervisor, hypervisor installes the guest's IDT (except for special interrupts like timer) to CPU. So almost all interrupts are handled by guest OS directly, bypassing the xen hypervisor.

Which one is correct? (My guess is second one because it's more efficient)

Thanks
Weiming
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