Virtualization
Revision as of 12:41, 8 November 2021 by Chatcannon (talk | contribs) (→Running 64k guests on 4k hosts: Add reference to describe libvirt XML section)
Running 64k guests on 4k hosts
When trying to start a VM on a host running with 4k pages, you might see the following error message:
qemu-system-ppc64: Can't support 64 kiB guest pages with 4 kiB host pages with this KVM implementation
There is an easy workaround for this. If running QEMU directly, add the argument -machine pseries,cap-hpt-max-page-size=4096. If running QEMU via libvirt, add the following section[1] to the guest's libvirt XML (via virsh edit [guest name] or the XML tab in virt-manager):
<features>
<hpt>
<maxpagesize unit='KiB'>4</maxpagesize>
</hpt>
</features>
