Re: [Qemu-devel] pvpanic device should not be automatically included as an internal device

[Michael S. Tsirkin]

On Thu, Aug 01, 2013 at 04:08:57PM +0300, Marcel Apfelbaum wrote:
> Hi,
> 
> The problem with pvpanic being an internal device is that VMs running
> operating systems without a driver for this device will have problems
> when qemu will be upgraded (from qemu without this pvpanic).
> 
> The outcome may be, for example: in Windows(let's say XP) the Device manager
> will open a "new device" wizard and the device will appear as an unrecognized 
> device.
> Now what will happen on a cluster with hundreds of such VMs? If that cluster 
> has a health
> monitoring service it may show all the VMs in a "not healthy" state.
> 
> My point is that a device that requires a driver that is not "inbox", should 
> not
> be present by default.
> One possible solution is to add it manually with -device from command line.
> 
> Any thoughts?
> Marcel

Interesting. You are basically saying we should have a rule
that no new builtin devices should be added
without an explicit request from management interface?


-- 
MST