[vbox-dev] Virtualbox without VT-x crashes when running Android

Alexey Eromenko al4321 at gmail.com
Thu Oct 24 14:35:31 UTC 2013


Actually with Android, I don't get a VirtualBox crash, but I _do_ get
a kernel panic in software VT.
It works with hardware VT-x.

And yes, hardware VT on early Core/Core2 series can perform slower
than software VT in rare cases.

Host: Windows 7 x64, VBox 4.3.0, Core i7 2600K
Guest: Android 4.3 (link:
https://android-x86.googlecode.com/files/android-x86-4.3-20130725.iso)

-Technologov

On Thu, Oct 24, 2013 at 4:24 PM, Alexey Eromenko <al4321 at gmail.com> wrote:
>>I have another question. I searched in FAQ and saw someone reported that virtualbox could run faster when hardware VT-x was disabled. Not sure what guest did they run. If software virtualization is incomplete, how can software virtualization run faster than the hardware virtualization?
>
> In my own experience, the typical desktop performance is about the
> same. VT-x on or off.
> Just some rare commands are not done correctly in software VT mode, so
> some OSes do not like it. (IBM OS/2, Mac OS X, OpenBSD, ancient
> versions of Linux such as Red Hat Linux 7, from year-2000, etc...)
> The "incomplete" part is only about the commands it supports, but if
> it works, it is super-fast.
>
>
> On Thu, Oct 24, 2013 at 12:02 PM, Knut St. Osmundsen
> <knut.osmundsen at oracle.com> wrote:
>> Hi Louis,
>>
>> could you provide us with steps how to reproduce this, please?
>> Alternatively, a core dump might be helpful if it's difficult to reproduce
>> without your ARM app.
>>
>> Kind Regards,
>>  bird.
>>
>> On 10/23/2013 7:35 AM, Louis Luo wrote:
>>
>> Hi VBox developers,
>>
>> We are experiencing some crashes when we run Android X86 with VBox on a
>> system without VT-x. The App we run contains ARM code, so we add libhoudini
>> to the VM (just like what AndroidVM does). When we start the App, VBox
>> crashes. If we turn on VT-x, it seems everything is just fine. Can anyone
>> explain what happened here?
>>
>> Thanks,
>> Louis
>>
>>
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>>
>>
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>
>
>
> --
> -Alexey Eromenko "Technologov"



-- 
-Alexey Eromenko "Technologov"



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