JP Vossen on 24 Nov 2010 12:09:50 -0800

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Re: [PLUG] Virtualization for small system?

Date: Wed, 24 Nov 2010 04:33:18 -0500
From: Richard Freeman<>

On 11/23/2010 08:16 AM, Art Alexion wrote:
>      1. VBox will run a 64 bit windows guest on a 32 bit Linux host ...
>         but very poorly.  Don't bother with it.

One more that I'll add - I can't vouch for 32-bit hosts, but virtualbox
will not run 64-bit guests on a 64-bit host unless it has hardware
virtualization support.  Most CPUs sold in the last few years have this,
but if you have an older system you're probably out of luck.

And even when the CPU supports it, the BIOS has to a) support it and b) be enabled. I've seen various forum posts that claim the former, and I've run into the latter, where a brand new box had it disabled in the BIOS out-of-the-box. I simple reboot and BIOS tweak fixed it, but ruined my uptime. :-)

* Is my CPU VT capable
$ egrep '^flags.*(vmx|svm)' /proc/cpuinfo
### Any output = yes

* Is my CPU 64-bit (64bit)
$ [ "$(grep flags /proc/cpuinfo | grep -wo 'lm' | sort -u)" = 'lm' ] && { echo '64-bit'; } || { echo '32-bit'; }

JP Vossen, CISSP            |:::======|
My Account, My Opinions     |=========|
"Microsoft Tax" = the additional hardware & yearly fees for the add-on
software required to protect Windows from its own poorly designed and
implemented self, while the overhead incidentally flattens Moore's Law.
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