Qemu vs VMWare

[Tony Nelson]

On 09-10-26 08:12:45, Marko Vojinovic wrote:
> On Monday 26 October 2009 04:15:34 Tony Nelson wrote:
> > The way recommended by QEMU developers is to use KVM, purchasing 
> > new hardware that supports KVM if necessary, in which case you 
> > won't need to use much of QEMU.
 ...
> > Good performance on other hardware requires the
> > kernel module kqemu.  The QEMU developers have deprecated kqemu and
> > are removing it from the next version (.12 IIRC), but you can 
> > currently still use kqemu if you build QEMU with kqemu enabled.
 ...
> Ok, so I did a yum search and a yum install kqemu, which pulled in
> appropriate kmod packages and all. Then I started the qemu guest to 
> see what happens. But the module did not get loaded (lsmod doesn't 
> report it). I shutdown the guest, loaded the module manually via 
> modprobe (which worked), checked that it is loaded, started the guest 
> again, and went to see if there is any performance difference. But 
> there wasn't.
> 
> So I wonder how to use the kqemu module? Or rather, how to explain to
> qemu that there is a module loaded and that it should use it? There 
> is nothing obvious in the GUI about this, where do I set it up?

As I said, you need to build QEMU with kqemu support.


> If default Fedora rpm version of qemu is *not* built with kqemu
> enabled, then that is very unfotunate, since I don't want to 
> recompile the whole qemu in order to avoid recompiling vmware 
> modules. That would defeat the whole point f using it in the first 
> place.

Support for kqemu was removed from QEMU when KVM support was added, and 
kqemu itself will be removed soon.  You should use some other product, 
either VirtualBox or VMWare.


> So can you tell me how to get the kqemu module to work?
 ...

Rebuild QEMU with the patches in 
<https://bugzilla.redhat.com/show_bug.cgi?id=520284>, using a version 
of QEMU that still has kqemu in it (version < .12, I think).

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