[clug] KVM

Bob Edwards bob at cs.anu.edu.au
Fri Sep 29 02:09:32 UTC 2017

On 29/09/17 10:32, George at Clug via linux wrote:
> Does anyone run a KVM hypervisor?

Yes - several.

> ​Does anyone run a KVM hypervisor on an AMD CPU?

No - not yet.

> ​Does anyone run KVM hypervisors on both AMD and Intel CPUs?


> ​Does anyone run a KVM hypervisor on an AMD Ryzen Threadripper [1]
> CPU?


> If so what Linux Distribution is your KVM hypervisor running on?

Debian Jessie and Stretch.

> So far I have only used Intel CPUs for KVM hypervisor builds. I read
> Red Hat doco suggests you can live migrate Intel based hypervisor
> Virtual Machines to ADM based hypervisors (and back again). Not sure
> what this really means in terms of what CPU configuration the Virtual
> Machine requires for this to work.

For "standard" workloads, I can't see why this might be an issue,
provided both CPUs support the word width (32-bit/64-bit) of the VM.

If the VM is using instruction set extensions particular to one CPU
family or another, then it may well be a problem for live migrations.


Bob Edwards.

> Links:
> ------
> [1] https://www.newegg.com/Product/Product.aspx?Item=N82E16819113447

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