Difference between revisions of "Virtualization"
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↑ https://gitlab.com/libvirt/libvirt/-/issues/227#note_705948269
Chatcannon (talk | contribs) (Add links to more documentation) |
Chatcannon (talk | contribs) m (→Running 64k guests on 4k hosts: Add reference to describe libvirt XML section) |
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<nowiki>qemu-system-ppc64: Can't support 64 kiB guest pages with 4 kiB host pages with this KVM implementation</nowiki> | <nowiki>qemu-system-ppc64: Can't support 64 kiB guest pages with 4 kiB host pages with this KVM implementation</nowiki> | ||
| − | There is an easy workaround for this. If running QEMU directly, add the argument <code>-machine pseries,cap-hpt-max-page-size=4096</code>. If running QEMU via libvirt, add the following section to the guest's libvirt XML (via <code>virsh edit [guest name]</code> or the XML tab in virt-manager): | + | There is an easy workaround for this. If running QEMU directly, add the argument <code>-machine pseries,cap-hpt-max-page-size=4096</code>. If running QEMU via libvirt, add the following section<ref>https://gitlab.com/libvirt/libvirt/-/issues/227#note_705948269</ref> to the guest's libvirt XML (via <code>virsh edit [guest name]</code> or the XML tab in virt-manager): |
<nowiki> | <nowiki> | ||
<features> | <features> | ||
Revision as of 12:41, 8 November 2021
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>
