must use VMware sometimes
I must use VMware sometimes for colaboration projects where others are using VMware. And also a situation where I have a VERY old development environment perfectly tweaked on Win98. I have to do one of these say 10% of the time.
100% of the time I'd like to use KVM (or Xen). I'd like to not have to close KVM VMs and unload the modules just so I can do a little work in VMware.
Is this possible? Or will it ever be possible? Initially I thought since VMware (workstation) didn't use any VM extensions of processors, it would not interfere with the KVM or Xen... but I seem to be wrong.
Tell me... use VMware basically prohibits me from using KVM or Xen?
Thanks,
Scott Serr
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I'm sure the developers will be more than happy to answer your question, for which I sadly don't know the answer.
But perhaps I can speculate/think aloud....
What would be needed for these instances is for Virtualization software makers to agree on an EXTERNAL API shared by all the VMs, so that when you launch another virtualization software, the other is "put to sleep" so to speak (call it "hibernate the VM" call it whatever you want), so the new Virtualization app just loaded kicks in. When this one is closed, the other resumes operation just as if the user had manually closed and then re-opened it.
Think this is doable? After all, if the industry sat together apparently to agree on a common file format...
File standard coming to virtualization products
http://news.zdnet.com/2100-9584_22-6206963.html?tag=nl.e550
FC
Quoted 29 lines · Scott Serr
I must use VMware sometimes for colaboration projects where others are using VMware. And also a situation where I have a VERY old development environment perfectly tweaked on Win98. I have to do one of these say 10% of the time.
100% of the time I'd like to use KVM (or Xen). I'd like to not have to close KVM VMs and unload the modules just so I can do a little work in VMware.
Is this possible? Or will it ever be possible? Initially I thought since VMware (workstation) didn't use any VM extensions of processors, it would not interfere with the KVM or Xen... but I seem to be wrong.
Tell me... use VMware basically prohibits me from using KVM or Xen?
Thanks,
Scott Serr-------------------------------------------------------------------------
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Well, there is discussion on VirtualBox about this topic as well, but no solution.
http://www.virtualbox.org/ticket/317
Ideally Linux needs some mechanism to "share" VMX across different virtualizers. But it doesn't exists, and not even planned.
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Quoted 9 lines · Scott Serr
I must use VMware sometimes for colaboration projects where others are using VMware. And also a situation where I have a VERY old development environment perfectly tweaked on Win98. I have to do one of these say 10% of the time.
100% of the time I'd like to use KVM (or Xen). I'd like to not have to close KVM VMs and unload the modules just so I can do a little work in VMware.
Quoted 6 lines
Is this possible? Or will it ever be possible? Initially I thought since VMware (workstation) didn't use any VM extensions of processors, it would not interfere with the KVM or Xen... but I seem to be wrong.
Tell me... use VMware basically prohibits me from using KVM or Xen?
I believe VMware uses real mode transiently, which is not possible when vmx extensions are enabled. So using VMware and kvm concurrently is not possible.
Maybe one of the following will suit:
- run the Windows 98 image in qemu (without kvm). This will have lower performance, but may be adequate.
- run VMware within a kvm VM, and run Windows 98 within that.
- unload the modules. This isn't a lot of fun and prevents concurrent operation.
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Quoted 22 lines · Avi Kivity
Quoted 9 lines · Scott Serr
I must use VMware sometimes for colaboration projects where others are using VMware. And also a situation where I have a VERY old development environment perfectly tweaked on Win98. I have to do one of these say 10% of the time.
100% of the time I'd like to use KVM (or Xen). I'd like to not have to close KVM VMs and unload the modules just so I can do a little work in VMware.
Quoted 7 lines
Is this possible? Or will it ever be possible? Initially I thought since VMware (workstation) didn't use any VM extensions of processors, it would not interfere with the KVM or Xen... but I seem to be wrong.
Tell me... use VMware basically prohibits me from using KVM or Xen?
I believe VMware uses real mode transiently, which is not possible when vmx extensions are enabled. So using VMware and kvm concurrently is not possible.
Quoted 7 lines
Maybe one of the following will suit:
- run the Windows 98 image in qemu (without kvm). This will have lower performance, but may be adequate.
- run VMware within a kvm VM, and run Windows 98 within that.
- unload the modules. This isn't a lot of fun and prevents concurrent operation.
Thanks Avi,
#2 sounds good to me "run VMware within a kvm VM, and run Win98 within that." I've gone all the way down this path with Xen but ended at a road block. VMware Workstation says it can run in a Xen VM and halts. If you grab VMware Server it lets you go, but during an install of CentOS early on, it freezes.
I'm not sure #2 is possible with KVM. Can someone comment if they are doing this reliably?
Thanks,
-Scott
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Quoted 14 lines · Scott Serr
Quoted 5 lines
I believe VMware uses real mode transiently, which is not possible when vmx extensions are enabled. So using VMware and kvm concurrently is not possible.
Quoted 7 lines
Maybe one of the following will suit:
- run the Windows 98 image in qemu (without kvm). This will have lower performance, but may be adequate.
- run VMware within a kvm VM, and run Windows 98 within that.
- unload the modules. This isn't a lot of fun and prevents concurrent operation.Thanks Avi,
Quoted 9 lines
#2 sounds good to me "run VMware within a kvm VM, and run Win98 within that." I've gone all the way down this path with Xen but ended at a road block. VMware Workstation says it can run in a Xen VM and halts. If you grab VMware Server it lets you go, but during an install of CentOS early on, it freezes.
I'm not sure #2 is possible with KVM. Can someone comment if they are doing this reliably?
Ryan Harper reported that it can be made to work, and I've included his patch in kvm-44.
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