Juergen Gross writes ("Re: [Xen-devel] [PATCH 3/3] xen: Document
XEN_SYSCTL_CPUPOOL_OP_RMCPU anomalous EBUSY result"):
> Just saw there are still two cases left where EBUSY will be returned:
>
> - when trying to remove the last cpu from a cpupool with active domains
> (EBUSY seems appropriate)
The problem is that EBUSY here might mean "this operation can't be
done because it amounts to a request for a configuration which
violates an invariant" or "this operation can't be done for temporary
reasons and you should retry it".
Ian.
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