[Pkg-xen-devel] Several xen problems in Debian Etch

Ian Jackson Ian.Jackson at eu.citrix.com
Tue Nov 27 14:08:43 UTC 2007


Henning Sprang writes ("Re: [Pkg-xen-devel] Several xen problems in Debian Etch"):
> I think it is definitely a mistake fo (upstream) Xen to handle a
> shutdown as destroy, just because the expected/intended behaviour cannot
> be done in HVM.
> 
> "normally", it should return with some "MethodNotImplemented - use
> destroy or shutdown your system from inside" Exception.

Yes, indeed.

> Then again, are you sure that using a PV disk/net IO driver (the primary
> purpose of those is to get better performance and circumvent the need
> for qemu emulation of some devices) in a HVM domU makes it possible to
> send the shutdown command to the guest?

I haven't investigated this area in detail but the code has obviously
been written to assume a `kit' of PV drivers in the guest.  Any PV
driver in the guest capable of discovering offered network and block
devices would necessarily have the capability to talk over xenbus to
the dom0 xenstored, and once that facility is available it's quite
simple to look for the shutdown request.

Ian.



More information about the Pkg-xen-devel mailing list