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Linux - Virtualization and Cloud This forum is for the discussion of all topics relating to Linux Virtualization and Linux Cloud platforms. Xen, KVM, OpenVZ, VirtualBox, VMware, Linux-VServer and all other Linux Virtualization platforms are welcome. OpenStack, CloudStack, ownCloud, Cloud Foundry, Eucalyptus, Nimbus, OpenNebula and all other Linux Cloud platforms are welcome. Note that questions relating solely to non-Linux OS's should be asked in the General forum.

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Old 01-15-2010, 07:31 PM   #1
tuxgirl
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Virtualbox - 64-bit or 32-bit guests?


I've got an ubuntu 64-bit host running virtualbox. I want to setup several linux guests which will only have 1 or 2 GB of RAM. Is there any reason to to install the guests with a 64-bit OS, or can I install 32-bit and not notice any difference?

Thanks in advance!
 
Old 01-15-2010, 08:50 PM   #2
kirukan
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64bit hardware will support 32bit operating system, hope you can run 32bit guest operating systems
 
Old 01-15-2010, 08:58 PM   #3
GrapefruiTgirl
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@ tuxgirl -- I've moved your thread to the "Virtualization" area, as it seems to fit better here.

Sasha
 
Old 01-16-2010, 01:26 AM   #4
lupusarcanus
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Virtualbox has it's own set of drivers and firmware that the host OS uses to virtualize guests. These virtual drivers support 64-BIT OS'es but can just as easily support 32-BIT as well. Just like you can on a real computer.
 
Old 01-17-2010, 03:18 PM   #5
tuxgirl
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Thank you for the response, but that wasn't quite what I was after. I can run 32-bit guests.

What I'm looking for is what sort of performance difference would I see, if my guest is only using 1GB or less of RAM, running a 32-bit guest versus a 64-bit guest.

I had previously setup the BIOS for 64-bit virtualization, but it still doesn't seem to work, despite being able to grep vmx in /proc/cpuinfo. It tells me "This kernel requires an x86-64 CPU, but only detected an i686 CPU. Unable to boot - please use a kernel appropriate for your CPU."
uname -a: Linux foo 2.6.28-17-server #58-Ubuntu SMP Tue Dec 1 22:13:36 UTC 2009 x86_64 GNU/Linux

I suspect that I need to turn the computer off for a bit rather than just rebooting. As it is very difficult (though not impossible) to access the BIOS again to troubleshoot anything, I am wondering how much of a difference running a 32-bit guest (ubuntu server w/apache) would make versus 64-bit, any?

Thanks!
 
Old 01-17-2010, 07:14 PM   #6
lupusarcanus
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Quote:
Originally Posted by tuxgirl View Post
Thank you for the response, but that wasn't quite what I was after. I can run 32-bit guests.

What I'm looking for is what sort of performance difference would I see, if my guest is only using 1GB or less of RAM, running a 32-bit guest versus a 64-bit guest.

I had previously setup the BIOS for 64-bit virtualization, but it still doesn't seem to work, despite being able to grep vmx in /proc/cpuinfo. It tells me "This kernel requires an x86-64 CPU, but only detected an i686 CPU. Unable to boot - please use a kernel appropriate for your CPU."
uname -a: Linux foo 2.6.28-17-server #58-Ubuntu SMP Tue Dec 1 22:13:36 UTC 2009 x86_64 GNU/Linux

I suspect that I need to turn the computer off for a bit rather than just rebooting. As it is very difficult (though not impossible) to access the BIOS again to troubleshoot anything, I am wondering how much of a difference running a 32-bit guest (ubuntu server w/apache) would make versus 64-bit, any?

Thanks!
Unless your guest is going to have more than 4 GB of RAM, you will see no difference in performance.
 
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Old 08-30-2011, 12:58 AM   #7
asifh.sayed
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Vm installation

Hello sir,

i getting the error when i installation of VM box in xp (This kernal requires an x86-64 cpu, but only detected an i686 cpu unable to boot- please use a kernal appropriate for your cpu ls help me what i do now

please use kernel appropriate for your cpu in xp
 
Old 08-30-2011, 01:02 AM   #8
asifh.sayed
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Hello sir,

i getting the error when i installation of VM box in xp (This kernal requires an x86-64 cpu, but only detected an i686 cpu unable to boot- please use a kernal appropriate for your cpu ls help me what i do now
 
Old 08-30-2011, 04:02 PM   #9
jefro
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You should post new questions instead of confusing old topics maybe.

Get the 32 bit app.

Last edited by jefro; 08-30-2011 at 04:03 PM.
 
  


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