On Fri, Oct 24, 2014 at 03:43:55PM +0200, Kashyap Chamarthy wrote:
> Versions:
>
> $ rpm -q libvirt-daemon-kvm qemu-system-x86
> libvirt-daemon-kvm-1.2.9-3.fc21.x86_64
> qemu-system-x86-2.1.2-4.fc21.x86_64
>
>
> When I attempt to revert to an internal snapshot:
>
> $ virsh snapshot-list node1
> Name Creation Time State
> ------------------------------------------------------------
> snap1 2014-06-03 14:07:28 -0400 running
>
> $ virsh snapshot-revert node1 snap1
> error: XML error: Non-empty feature list specified without CPU model
>
>
> Contextual guest XML:
>
> $ virsh dumpxml node1 | grep features -A3
> <features>
> <acpi/>
> <apic/>
> <pae/>
> </features>
> <cpu mode='host-passthrough'>
> </cpu>
> <clock offset='utc'>
>
>
> I see it's thrown from here, src/conf/cpu_conf.c, from function:
> virCPUDefParseXML:371
>
> [. . .]
> 367 if (n > 0) {
> 368 if (!def->model && def->mode != VIR_CPU_MODE_HOST_MODEL) {
> 369 virReportError(VIR_ERR_XML_ERROR, "%s",
> 370 _("Non-empty feature list specified without "
> 371 "CPU model"));
> 372 goto error;
> 373 }
> [. . .]
>
>
> I can manually revert this snapshot via `qemu-img`, but wondering if
> this error from libvirt expected in this case?
Forgot, there's an existing old bug report that I tested and confirmed
here:
https://bugzilla.redhat.com/show_bug.cgi?id=1030793 --
snapshot-revert fails if cpu mode=passthrough -- XML error:
Non-empty feature list specified without CPU model
Comment from Eric Blake on IRC: Sounds like yet another incarnation of
us not outputting correct information in our dumpxml output.
--
/kashyap
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