[libvirt] [Question] Will we support to set boot order online?

Jiri Denemark jdenemar at redhat.com
Mon Mar 3 13:31:00 UTC 2014


On Mon, Mar 03, 2014 at 09:58:40 +0000, Daniel Berrange wrote:
> On Mon, Mar 03, 2014 at 08:22:13AM +0000, Wangyufei (James) wrote:
> > Hello,
> >     I find that QEMU supports to set boot(QMP command "boot_set") order
> > online, namely the virtual machine  can be reboot in appointed order,
> > but libvirt had no corresponding interface. So, I want to know if libvirt
> > intend to  support to set boot order online. If the answer is yes, I'll
> > try to apply the patch. If no, why?
> 
> AFAIK, no one has looked at this.
> 
> NB, this will only work for guests actually using the old style boot
> order. Any guests using per-device boot indexes for ordering won't
> work with this command.

Hmm, looks like it's quite useless because libvirt uses per-device boot
indexes whenever it is possible even if the domain XML used the old way
of specifying boot order. Thus, it's very likely any domain running in a
QEMU which is not ancient will be using per-device boot order.

Jirka




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