On Sun, Sep 19, 2010 at 05:37:18PM +0200, Conrad Wood wrote:
>
> > > I need to know if a cpu is currently inserted or ejected.
> > >
> > The only way to do that currently is to track it in your management app.
>
> The Management App does know which one should be inserted or ejected.
> I see now way of enforcing it though.
>
> This is what I had in mind: (simplified)
>
> 1. Management App increase cpus
> 2. kvm (as instructed by app): insert cpu x
> 3. guest os: online cpu x
> 4. do some stuff in the guest...
> 5. guest os: offline cpu x
> 6. Management App decrease cpus
> 7. kvm (as instructed by app): eject cpu x
>
> However after step 7 the guest can turn the cpu online again by issuing
> echo 1 >/sys/devices/.../cpuX/online
There will be no /sys/devices/.../cpuX/online in guest after step 7.
> If the guest does so, the Management App has no way of knowing and thus
> cannot provide accurate logs - that is why it is so important.
>
> Conrad
>
>
--
Gleb.
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