Re: [PATCH v7 00/22] Support SDEI Virtualization

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On Tue, Jul 05, 2022, Paolo Bonzini wrote:
> That said: Peter, Sean, Google uses or used postcopy extensively on GCE
> (https://dl.acm.org/doi/pdf/10.1145/3296975.3186415).  If it doesn't use it
> on x86, do you have any insights on why?

We still use postcopy, but we don't use async #PF.  Async #PF is disabled (mostly?)
because the x86 implementation was such a mess prior to switching to IRQ-based
delivery and AFAIK we haven't re-evaluated it since that update.
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