kvm mmu notifier

[Hu Yaohui]

Hi All,
If the host system decides that it wants to push a given page out to
swap, the host will notify the host through registered mmu notifier to
inform the guest. I am wondering if there any other situations, other
than swapping, which will trigger the mmu notifier to inform host page
change to the guest?
Thanks for your time!

Best Wishes,
Yaohui Hu
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