Re: [Xen-devel] Re: [Qemu-devel] [PATCH 05/13] xen: groundwork for xen support

[Gerd Hoffmann]

Daniel P. Berrange wrote:
> Probing for whether a domain ID exists in the hypervisor, and if not, then
> creating it, has a nasty race condition, where XenD could launch QEMU
> and then (for whatever reason) decide to kill off the domain, but QEMU
> then re-creates it during its startup procedure.

Oops.  Yes, that needs to be addressed.

> If we want QEMU to explicitly created Xen domains from scratch, rather than
> attaching to an existing one, then there needs to be a way to reliably 
> specify this behaviour via the CLI.

So we are scoring at three options for xen now:

  -xen-domid <nr>  specify xen domain id.
  -xen-create      ask qemu to create the domain.
  -xen-emulate     force xen emulation mode.

I'll go add these for the next round.

cheers,
  Gerd