Re: KVM and VMware

[Avi Kivity <avi@redhat.com>]

Manfred_Knick wrote:
> I have successfully enjoyed KVM for para-virtualized Linux guests :))
>
>
> Unfortunately I have to maintain some SW for a customer
> which is running on a specialized HW,
> so I only have the chance to maintain that in customer-supplied VMware
> virtual machines.
>
> Trying to emerge (Gentoo on amd64) VMware Workstation in addition,
> I ran into
>
> ==> "You cannot install on a system with KVM enabled."
>
> Digging, I found
>
> --> http://communities.vmware.com/thread/188359 :
>
> ksc:
> "VMware switches in and out of root mode each time so as to not conflict
> with other virtualization software.
> KVM likes to hang onto the virtualization root mode aggressively for a
> minor performance gain.  (*)
> For comparison, Parallels hangs on to the root mode but detects other
> virtualization software and lets go when it detects a conflict.
> Until KVM becomes more compatible with other software, our installer
> will detect KVM and actively try to prevent you from getting into this
> situtation."
>
> CharlieM:
> "IIRC, there was an issue where unloading the KVM module was not enough,
> as it forgot to 'let go' of root mode when it was unloaded. I don't
> think that bug lasted long, but it's something to watch for; just be
> sure your distro is up to date."
>
>
>
> A) Is (*) correct?
>   

Yes.

> B) Any chance to solve this problem?

'rmmod kvm-intel; rmmod kvm' should work.

-- 
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