Re: [Xen-devel] [PATCH 1/2] hvmloader: limit CPUs exposed to guests

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 16/06/16 10:40, Jan Beulich wrote:
> Various Linux versions allocate (partial) per-CPU data for all of them,
> as there is no indication in MADT whether they're hotpluggable. That's
> a little wasteful in terms of resource consumption especially for
> - guests with not overly much memory assigned,
> - 32-bit guests not having overly much address space available.
> Therefore limit what we put into MADT to the "maxvcpus" value, and make
> sure AML doesn't touch memory addresses corresponding to CPUs beyond
> that value (we can't reasonably make the respective processor objects
> disappear).
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

I don't feel that I know AML well enough to review, but the C looks ok
and this seems like a sensible change.

Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

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