Re: [Xen-devel] [PATCH] Export Multicore information

[Keir Fraser <keir@xxxxxxxxxxxxx>]

On 15/12/06 11:18 pm, "Kamble, Nitin A" <nitin.a.kamble@xxxxxxxxx> wrote:

> 2. Temporary altering vcpu-pcpu binding: To get information for all cpus
> in the guest_land.
>   One issue with this approach is, if the admin has giving fewer than
> total cpus to dom0, and it has hard bound the dom0 vpcus to pvcpus, then
> this will not work.

There is no such hard binding. You can always re-bind a dom0 vcpu to some
other pcpu if you really want to. If we do add hard binding for dom0 then it
will be because we want a 1:1 relationship between vcpus and pcpus -- if
this is added we'll provide a way for the application to detect and switch
to a different mode of operation (where it switches affinity among vcpus,
rather than sitting on one vcpu and switching among pcpus).

We don't want any more hypercall interfaces, and we probably don't want any
more sysfs interfaces. This can all be coded in userland.

 -- Keir


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