Determine which guest is running on XEN: HVM or PV guest

最新推荐文章于 2024-03-21 22:30:05 发布

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最新推荐文章于 2024-03-21 22:30:05 发布

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本文详细介绍了Xen虚拟化环境中三种不同的运行模式：HVM、PV-HVM及PV，并通过具体的命令行操作示例展示了如何判断当前系统所处的虚拟化模式。了解这些模式有助于更高效地管理和配置Xen虚拟机。

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A quick note, there are actually 3 modes, not two when it comes to the drivers in use:

HVM: unmodified kernel and drivers using software emulated devices
PV-HVM: unmodified kernel with paravirtualized (Xen specific) disk and network drivers
PV: modified kernel and drivers
For a Xen guest/DomU you can do a very basic uname and lsmod with a grep to list the modules in use:

uname -a
lsmod | grep xen
If uname -a lists a kernel with the string “xen” in it, then you have a modified kernel and it’s likely a PV guest, and you will see output from the lsmod command to confirm it. If you have output from the grep on lsmod but no sign of a modified kernel then you are PV-HVM. Without any sign of either, it’s a straight HVM.

Note: Generally you can do more with VMs that have the PV tools installed, so that can be quite an obvious pointer, however you can fake the presence of the PV tools to allow suspend/resume etc. so you cannot rely on that in general.