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xen-devel
Re: [Xen-devel] [Patch] use full-size cpumask for vcpu-pin
On 10/08/2010 15:11, "Ian Jackson" <Ian.Jackson@xxxxxxxxxxxxx> wrote:
> Juergen Gross writes ("[Xen-devel] [Patch] use full-size cpumask for
> vcpu-pin"):
>> The reason is the allocation of the cpumap for pinning: the size is only for
>> the ACTUAL number of physical cpus in the system, not the possible number.
>> The solution is to allocate a cpumap for up to NR_CPUS.
>
> Thanks for this patch. However, this doesn't seem to be even slightly
> backwards-compatible, because it changes the layout of the physinfo
> sysctl response.
The domctl and sysctl hypercalls do not need to be backward compatible
across major Xen releases. All other hypercalls absolutely do.
-- Keir
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