[libvirt-users] [RFC] per-device metadata

[Peter Krempa]

On Thu, Mar 16, 2017 at 14:52:47 +0000, Daniel Berrange wrote:
> On Thu, Mar 16, 2017 at 03:50:51PM +0100, Peter Krempa wrote:
> > On Thu, Mar 16, 2017 at 14:42:30 +0000, Daniel Berrange wrote:
> > > On Thu, Mar 16, 2017 at 01:46:38PM +0100, Peter Krempa wrote:
> > > > On Mon, Feb 27, 2017 at 16:41:28 +0100, Francesco Romani wrote:

[...]

> The scenario where device attach fails is not the problem - you can
> get the same level of reliabilty to that by simply updating the
> global metadata before & after hotplug in the same way. What is
> difficult is when libvirt fails to persist the XML config on disk
> or when libvirt crashes part way through the operation, and other
> akward failure scenarios unrelated to QEMU itself.

In that case you lose the device definition too, since saving the XML is
the integral part of the hotplug operation.
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