[Xen-cim] Re: Removing pcpus from the scheduling pool

[Keir Fraser <keir@xxxxxxxxxxxxx>]

On 19/12/06 15:01, "Subrahmanian, Raj" <raj.subrahmanian@xxxxxxxxxx> wrote:

>> * Support for ResourcePoolConfigurationService on some pool types,
>> e.g. ProcessorPool.This functionality will support for example
>> removing PCPUs from the pool and dedicate to management domain, thus
>> restricting set of PCPUs available for consumption by VMs.  Does xen
> support 
>> this?  Can we mask PCPUs such that they are not available to VMs?
> End quote.
> 
> What needs to be done to add this functionality to the current
> scheduler? 

The scheduler supports this already: it will simply be necessary to remove
the PCPUs removed from the pool from every domain's affinity map. All this
requires is for the tool stack on the box to remember which PCPUS are in the
pool and apply that as a mask to the affinity map of every guest.

 -- Keir


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