Re: [Xen-devel] Design session report: Live-Updating Xen

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
[snip]
> 
> Longer term vision:
> 
> * Have a tiny hypervisor between Guest and Xen that handles the common cases
>       -> this enables (almost) zero downtime for the guest
>       -> the tiny hypervisor will maintain the guest while the underlying xen 
> is kexecing into new
> build
> 

This sounds very much more like a KVM system... The majority of Xen becomes the 
'kernel and QEMU' part (i.e. it's the part that boot-straps the system, deals 
with IOMMU, APICs, etc. and incorporates the scheduler) and the tiny hypervisor 
is the 'kvm.ko' (deals with basic I/O and instruction emulation traps). Is that 
the general split you envisage?

  Paul

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