客户操作系统中的非分页 memory 可以在 Windows Hyper-V 中分页吗？

Question

Say I am writing a kernel driver and it is running in Windows in a Hyper-V child partition, there are some buffers from non-paged pool. Is this buffer guaranteed to be locked in physical memory of the host?

The background is that I would like to initiate DMA involving this buffer and I don't want the host to page it out.

Answer 1

Answering my own question. Based on an answer I got from someone on the Hyper-V team, he said the following:

Generally speaking, memory that is non-paged from a guest's perspective can be paged out by the host. However, if the guest has access to a physical device, the host will not page guest memory to avoid causing a DMA fault at the IOMMU. Whether the guest is Windows or Linux (or something else) is not a factor in this behavior.