Re: [Xen-devel] Cpu pools discussion

[Juergen Gross <juergen.gross@xxxxxxxxxxxxxx>]

Keir Fraser wrote:
> CPU hotplug raises a question in relation to cpupools, by the way. What pool
> does a cpu get added to when it is brought online? And what do you do when
> someone offlines a CPU (e.g., especially when it is the last in its pool)?
> In that latter case, have you not considered it, or do you refuse the
> offline, or do you somehow break the pool affinity so that domains belonging
> to it can run elsewhere?

These cases are already covered by my patch.
A new cpu is always added to the "free pool". It can then be assigned to any
pool. Perhaps it would be better to add it to pool 0, but that's a minor
detail, I think.
Offlining the last cpu of a pool with active domains is refused.


Juergen

-- 
Juergen Gross                 Principal Developer Operating Systems
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Fujitsu Technolgy Solutions               e-mail: juergen.gross@xxxxxxxxxxxxxx
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