Re: [Xen-devel] Cpu pools discussion

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 28/07/2009 06:40, "Juergen Gross" <juergen.gross@xxxxxxxxxxxxxx> wrote:

> BTW: continue_hypercall_on_cpu() exists on x86 only and it isn't really much
> better than my usage of it:
> - remember old pinning state of current vcpu
> - pin it temporarily to the cpu it should continue on
> - continue the hypercall
> - remove temporary pinning
> - re-establish old pinning (if any)
> Pretty much the same as my solution above ;-)

If your solution locks the pinning, as we do already, so that it cannot be
changed while the continue_hypercall_on_cpu() is running, then that is fine.
If it's not locked then it's not safe.

 -- Keir



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