blitzclone

11 ms·

1.
by blitzclone 2y ago
This is super nice, because I heard the normal VirtualBox has pretty buggy nested virtualization.
2.
by blitzclone 3y ago
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.
3.
by blitzclone 3y ago
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).
4.
by blitzclone 3y ago
Not yet. Nesting support is on our list. But the performance will not be great.
5.
by blitzclone 3y ago
Yes!
6.
by blitzclone 3y ago
Haha. I understand the sentiment. That's a pretty large effort though and needs some funding as well.
7.
by blitzclone 3y ago
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 and you have to piece together things, which is very unpl
8.
by blitzclone 3y ago
That's already b0rken in the Oracle sources.
9.
by blitzclone 3y ago
Ok. We'll try to clarify the situation in the README. Thanks for the feedback!
10.
by blitzclone 3y ago
Thank you!
11.
by blitzclone 3y ago
>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 wouldn't hold my breath. Oracle gonna Oracle. &gt
12.
by blitzclone 3y ago
Ooops. Will fix. :) Thanks!
13.
by blitzclone 3y ago
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/products/hypervisor (Don'
14.
by blitzclone 3y ago
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.
15.
by blitzclone 3y ago
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.
16.
by blitzclone 3y ago
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 vanilla VBox definitely has fewer people looking at it. It also
17.
by blitzclone 3y ago
The KVM backend doesn't have nesting enabled just yet. We're on it.
18.
by blitzclone 3y ago
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 Linux kernel module for that. That has drawbacks.
19.
by blitzclone 3y ago
Yes.
20.
by blitzclone 3y ago
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 modified. So besides as curiosity or test vehicle, approache
21.
by blitzclone 3y ago
Yes, we are switching between vanilla VBox and KVM VBox during development quite often and the VMs are fine with it.
22.
by blitzclone 3y ago
Great! What guests do you typically run where you see better performance with libvirt/kvm?
23.
by blitzclone 3y ago
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.
24.
by blitzclone 3y ago
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. :)
25.
by blitzclone 3y ago
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 fiddling. VirtualBox is in general very user friendly. Guest