Viewing profile — blitzclone

This is super nice, because I heard the normal VirtualBox has pretty buggy nested virtualization.

Yes, this is indeed nice. I have a Chromebook as well and the integration with Linux apps is super seamless. The major usecase for VBox is mostly Windows, though.

We're offering commercial support. We can also help with graphics virtualization and other topics (e.g. performance tuning and automated testing in real world scenarios).

Not yet. Nesting support is on our list. But the performance will not be great.

Yes!

Haha. I understand the sentiment. That's a pretty large effort though and needs some funding as well.

We have used this with recent Intel GPUs that support SR-IOV. This is what you see in the video on the cyberus website. Intel hasn't managed to upstream the drivers for this yet an…

That's already b0rken in the Oracle sources.

Ok. We'll try to clarify the situation in the README. Thanks for the feedback!

Thank you!

>How does this work in licensing terms? If VB foss enough? It's as FOSS as the VirtualBox open source edition. > Do you expect Oracle to merge this? That would be nice, but I would…

Ooops. Will fix. :) Thanks!

You can also setup VFIO in VirtualBox/KVM. We haven't polished it yet though. You can check the video here to see GPU virtualization in action: https://www.cyberus-technology.de/pr…

It depends on your setup and workload. On a recent Intel CPU, our performance dashboard shows +10% for some benchmarks. It's hard to make a general statement though.

The KVM backend in vanilla VBox cannot be activated without changing the code. If you tried it, you tried the vanilla VBox hypervisor (vboxdrv) instead of KVM.

Well, KVM is used by Google and AWS and others for their clouds. As such, there are a lot of eyes on KVM code. The vboxdrv kernel module that provides the same functionality in van…

The KVM backend doesn't have nesting enabled just yet. We're on it.

The name KVM is a bit confusing. It doesn't do anything fundamental different than VirtualBox. The difference is that KVM comes by default with any Linux. VirtualBox ships it's own…

Yes.

There is no real connection to UML here. Hardware virtualization (Intel VT, AMD-V) are much faster in practice and also don't require the guest operating system to be heavily modif…

Yes, we are switching between vanilla VBox and KVM VBox during development quite often and the VMs are fine with it.

Great! What guests do you typically run where you see better performance with libvirt/kvm?

Oracle already had an unfinished and broken KVM backend in the code that was not exposed. Whether they incorporate this polished KVM backend is anyone's guess at this point.

The intention is to have this under the same license as the VBox open source release. If there is a way to clarify this more on the Github page, please advise. :)

The out-of-the-box performance of Windows in VirtualBox is very good and usually better than virt-manager (Qemu). You can tune Qemu to great performance as well, but it takes some …