Messages in this thread | | | Date | Thu, 8 Aug 2013 20:15:22 +0100 | From | "Richard W.M. Jones" <> | Subject | Re: [QUERY] lguest64 |
| |
On Wed, Jul 31, 2013 at 12:39:23PM +0300, Mike Rapoport wrote: > On Tue, Jul 23, 2013 at 4:28 AM, Rusty Russell <rusty@rustcorp.com.au> wrote: > > Yes, the subset of x86-64 machines for which there isn't hardware > > virtualization support is pretty uninteresting. > > There are plenty virtual machines in EC2, Rackspace, HP and other > clouds that do not have hardware virtualization. I believe that > running a hypervisor on them may be pretty interesting.
[Jumping in rather late]
The problem with basing this on lguest is that you would need to implement a whole lot of stuff from qemu to make lguest really useful as a modern hypervisor. eg. qcow2 and a variety of other block devices, kvmclock, virtio{-scsi,-net}. Probably more, but just implementing those will keep you going for a while. It might also be feasible to add lguest support to qemu.
However I think it's best to do nothing and use TCG mode in qemu. TCG is a bit slower than lguest or UML, but definitely not unusable. It's a drop-in replacement for qemu/KVM with all the same features, and it works today.
We use and support TCG to make libguestfs work on EC2.
Rich.
-- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Fedora Windows cross-compiler. Compile Windows programs, test, and build Windows installers. Over 100 libraries supported. http://fedoraproject.org/wiki/MinGW
| |