RE: [Xen-users] Config: Paravirtualization and Full Virtualization

[MJang <mike@xxxxxxxxxxxxxx>]

On Wed, 2007-01-31 at 11:54 +0200, Graeme Gerber wrote:
> Where's the difference in the guest installation (or maybe in the host
> installation?) when you install a Linux in paravirtualization mode, or
> in full virtualization mode (VT or pacifica)?
> 
> g>> Full gives better performance from what I hear.  Your hardware
> should be suitable and the bios option enabled.
> If you know anything about bios pls do let me know as Sony have
> disabled this option in there bios.

Full gives better performance for the Xen client - but since Para does
not require complete hardware emulation (and requires optimized Xen
kernels), it results in better performance overall, especially if you
have multiple Xen clients.
> 
Many laptop mfrs disable VT, even if the Intel CPU supports it (AMD
VT-capable systems can't have VT disabled). There's a long HP thread on
the topic (which is also covered in /.)
http://forums.itrc.hp.com/service/forums/bizsupport/questionanswer.do?threadId=1051601

There are also interesting Wikis on the topic
http://wiki.xensource.com/xenwiki/IntelVT
http://wiki.xensource.com/xenwiki/HVM_Compatible_Notebooks

Thanks,
Mike


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