Nested VT-x crash with KVM

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Nested VT-x crash with KVM

Postby Technologov » 24. Sep 2019, 19:55

Level0 = Win 10, 64-bit, VBox 6.1.0-BETA1, Core i7 6600U
Level1 = Debian Linux 9, 64-bit + Linux-KVM. (Qemu/KVM is standard version from Debian 9)
Level2 = empty VM with Linux-KVM. Crash.
Attachments
Nested VT-x KVM.png
KVM crash screenshot.
Nested VT-x KVM.png (112.44 KiB) Viewed 1025 times
Debian 9 Workstation-2019-09-24-20-50-54.zip
Level0, Debian 9, vbox.log
(19.64 KiB) Downloaded 19 times
Technologov
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Re: Nested VT-x crash with KVM

Postby socratis » 24. Sep 2019, 20:18

Technologov,

There's no point in trying different exotic scenarios. Currently only VirtualBox (current) on VirtualBox (current) is supported AFAIK.
Do NOT send me Personal Messages (PMs) for troubleshooting, they are simply deleted.
Do NOT reply with the "QUOTE" button, please use the "POST REPLY", at the bottom of the form.
If you obfuscate any information requested, I will obfuscate my response. These are virtual UUIDs, not real ones.
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Re: Nested VT-x crash with KVM

Postby Technologov » 24. Sep 2019, 20:22

>There's no point in trying different exotic scenarios. Currently only VirtualBox (current) on VirtualBox (current) is supported.

1. Running KVM in a Linux guest is not exotic at all. (just like running Hyper-V in a Windows guest is not exotic, and expected to work)
2. Where is it written that only this or that is supported ? Oracle claimed 'Nested VT-x is working and stable', not even experimental label. (reading chapter 14.1. Experimental Features)
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Re: Nested VT-x crash with KVM

Postby socratis » 24. Sep 2019, 20:29

By exotic I mean your previous post as well:
VirtualBox 4.1.6 r74713 win.x86 (Nov  4 2011 13:40:24) release log


Technologov wrote:Where is it written that only this or that is supported ?
Rumors, from the horse's mouth...

Technologov wrote:Oracle claimed 'Nested VT-x is working and stable', not even experimental label
If anything, it's not stable and working. I've yet to see a working example. If you can point me to one, I'd appreciate it...

As I said, if you don't want to waste your time, stick with current VirtualBox on current VirtualBox... For the beginning at least.
Do NOT send me Personal Messages (PMs) for troubleshooting, they are simply deleted.
Do NOT reply with the "QUOTE" button, please use the "POST REPLY", at the bottom of the form.
If you obfuscate any information requested, I will obfuscate my response. These are virtual UUIDs, not real ones.
socratis
Site Moderator
 
Posts: 27690
Joined: 22. Oct 2010, 11:03
Location: Greece
Primary OS: Mac OS X other
VBox Version: PUEL
Guest OSses: Win(*>98), Linux*, OSX>10.5

Re: Nested VT-x crash with KVM

Postby Technologov » 24. Sep 2019, 20:34

'VirtualBox 4.1.6' -- yes, may sound exotic, but I took it for few reasons:
1. it officially supports 32-bit and Windows XP hosts.
2. It is _very well_ tested by me on various Intel CPUs and OSes (guest and host), and found to be stable version. So I know what to expect and how it worked on real hardware almost a decade ago...
3. I have it in my personal offline repository :)
Technologov
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